KDMX [030357]: Preliminary Local Storm Report

NWUS53 KDMX 030357
LSRDMX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1057 PM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

1040 PM TSTM WND DMG 2 S HUBBARD 42.28N 93.30W
09/02/2011 HARDIN IA NWS EMPLOYEE

SEVERAL BRANCHES DOWNED...SOME 10 INCHES IN DIAMETER.

&&

$$

DEITSCH

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KTFX [030349]: Preliminary Local Storm Report...summary

NWUS55 KTFX 030349
LSRTFX

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE GREAT FALLS MT
949 PM MDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

1108 AM NON-TSTM WND GST 3 SW CUT BANK 48.61N 112.38W
09/02/2011 M47 MPH GLACIER MT ASOS

1230 PM NON-TSTM WND GST 4 W HAVRE 48.54N 109.76W
09/02/2011 M45 MPH HILL MT ASOS

1233 PM NON-TSTM WND GST MALMSTROM AFB 47.51N 111.18W
09/02/2011 M46 MPH CASCADE MT ASOS

1236 PM NON-TSTM WND GST 5 WSW GREAT FALLS 47.47N 111.38W
09/02/2011 M49 MPH CASCADE MT ASOS

0218 PM NON-TSTM WND GST 13 S FORT BELKNAP 48.30N 108.72W
09/02/2011 M54 MPH BLAINE MT MESONET

&&

$$

BLANK

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WATCHES: Severe Thunderstorm Watch Number 824

WWUS20 KWNS 030325
SEL4
SPC WW 030325
IAZ000-030900-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 824
NWS STORM PREDICTION CENTER NORMAN OK
1025 PM CDT FRI SEP 2 2011

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

CENTRAL AND EAST CENTRAL IOWA

EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 1025 PM
UNTIL 400 AM CDT.

HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 40
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 70 MILES WEST OF DES
MOINES IOWA TO 50 MILES EAST NORTHEAST OF CEDAR RAPIDS IOWA. FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU4).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

DISCUSSION...THERE WILL BE SOME RISK FOR THE CONVECTIVE CLUSTERS
MOVING INTO W CENTRAL/CENTRAL IA TO PERSIST FOR A FEW MORE
HOURS...WITH AN ATTENDANT RISK FOR DAMAGING WINDS. THE ENVIRONMENT
IS SUPPORTIVE OF STRONG DOWNDRAFTS WITH STEEP MIDLEVEL LAPSE RATES
AND LARGE DCAPE/MODERATE CAPE...AS WELL AS EFFECTIVE BULK SHEAR
AROUND 35 KT TO MAINTAIN ORGANIZED CONVECTIVE STRUCTURES. THE
UNCERTAINTY CENTERS ON INCREASING CONVECTIVE INHIBITION AND RATHER
MODEST FORCING FOR ASCENT ALONG THE WSW-ENE SURFACE FRONT IN IA.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION
VECTOR 26035.

...THOMPSON

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KAPX [030322]: Preliminary Local Storm Report

NWUS53 KAPX 030322
LSRAPX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GAYLORD MI
1122 PM EDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

1210 PM MARINE TSTM WIND 1 WNW MANISTEE 44.25N 86.35W
09/02/2011 M48 MPH MANISTEE MI C-MAN STATION

MEASURED AT MANISTEE HARBOR. PEAK WIND OF 56 MPH OCCURRED
AT 1220 PM.

&&

$$

HALBLAUB

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KPUB [030311]: Preliminary Local Storm Report

NWUS55 KPUB 030311
LSRPUB

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PUEBLO CO
911 PM MDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0905 PM HEAVY RAIN 4 NE AIR FORCE ACADEMY 39.03N 104.81W
09/02/2011 M0.92 INCH EL PASO CO TRAINED SPOTTER

0.92 INCHES OF RAIN IN 12 MINUTES.

&&

$$

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KPUB [030308]: Preliminary Local Storm Report

NWUS55 KPUB 030308
LSRPUB

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PUEBLO CO
908 PM MDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0905 PM HEAVY RAIN 5 NE AIR FORCE ACADEMY 39.03N 104.80W
09/02/2011 M0.87 INCH EL PASO CO TRAINED SPOTTER

0.87 INCHES OF RAIN IN APPROXIMATELY 14 MINUTES...FROM
851 PM TO 905 PM. LARGEST HAIL SIZE WAS 3/8 INCH IN
DIAMETER...WHILE STRONGEST WIND GUST WAS 38 MPH.
PRECIPITATION HAS NOW ENDED.

&&

$$

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KOAX [030306]: Preliminary Local Storm Report

NWUS53 KOAX 030306
LSROAX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1006 PM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0947 PM TSTM WND GST HARLAN 41.65N 95.33W
09/02/2011 M83 MPH SHELBY IA AWOS

&&

$$

BKERN

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MESO: Mesoscale Discussion 2099

ACUS11 KWNS 030305
SWOMCD
SPC MCD 030304
IAZ000-030430-

MESOSCALE DISCUSSION 2099
NWS STORM PREDICTION CENTER NORMAN OK
1004 PM CDT FRI SEP 02 2011

AREAS AFFECTED...IA

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 030304Z - 030430Z

DAMAGING WINDS AS WELL AS SEVERE HAIL WILL REMAIN A CONCERN THROUGH
LATE EVENING WITHIN A WSW-ENE CORRIDOR ACROSS IA. IF INCREASING
CONVECTIVE TRENDS CONTINUE...A WATCH COULD BE NEEDED.

SEVERAL SMALL CLUSTERS OF STORMS HAVE EVOLVED/INCREASED FROM EXTREME
EASTERN NEB INTO SOUTHWEST/CENTRAL IA THIS EVENING...WITH ONE OF
THESE CLUSTERS NEAR I-80 BETWEEN OMAHA/DES MOINES PARTICULARLY
EXHIBITING RECENT ORGANIZATION/UPSCALE GROWTH. WITH SOME ADDITIONAL
UPSCALE GROWTH POSSIBLE...THIS ACTIVITY WILL CONTINUE TO FAVOR A
WSW-ENE NEAR-EFFECTIVE FRONTAL CORRIDOR ACROSS IA...WHERE A
RELATIVELY MOIST/UNSTABLE AND STRONG SHEARED ENVIRONMENT RESIDES
EVEN IN THE PRESENCE OF SLOWLY INCREASING NEAR-SURFACE CINH.
DAMAGING WIND POTENTIAL COULD REACH THE DES MOINES VICINITY AND
OTHER CENTRAL IA AREAS BY AROUND 04Z-0430Z.

..GUYER.. 09/03/2011

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...DVN...DMX...OAX...

LAT...LON 41069529 41889526 42659310 42529115 41669157 40969442
41069529

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KRNK [030241]: Preliminary Local Storm Report

NWUS51 KRNK 030241
LSRRNK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1041 PM EDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0320 PM HAIL PILOT MOUNTAIN 36.38N 80.47W
09/02/2011 E1.00 INCH SURRY NC PUBLIC

QUARTER HAIL AT FAMILY DOLLAR STORE AT 608 SOUTH KEY
STREET.

&&

$$

WERT

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KRNK [030239]: Preliminary Local Storm Report

NWUS51 KRNK 030239
LSRRNK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1038 PM EDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0630 PM NON-TSTM WND DMG 4 WSW INDEPENDENCE 36.58N 81.21W
09/02/2011 GRAYSON VA PUBLIC

NUMEROUS TREES...LARGE TREE LIMBS...AND POWER LINES DOWN
AT 27 DUCK ROOST LANE AND ON RIVER BEND ROAD AND COXS
CHAPPEL ROAD.

0320 PM TSTM WND DMG PILOT MOUNTAIN 36.38N 80.47W
09/02/2011 SURRY NC PUBLIC

LARGE BILLBORAD AND ROAD SIGNS BLOWN DOWN AT AND NEAR THE
FAMILY DOLLAR STORE AT 608 SOUTH KEY STREET.

&&

$$

WERT

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KOAX [030236]: Preliminary Local Storm Report

NWUS53 KOAX 030236
LSROAX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
936 PM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0932 PM TSTM WND GST SHELBY 41.51N 95.45W
09/02/2011 E60 MPH SHELBY IA TRAINED SPOTTER

&&

$$

JBRAND

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KGSP [030200]: Preliminary Local Storm Report

NWUS52 KGSP 030200
LSRGSP

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1000 PM EDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0806 PM TSTM WND DMG 4 S BANNER ELK 36.10N 81.87W
09/02/2011 AVERY NC LAW ENFORCEMENT

A FEW TREES BLOWN DOWN.

&&

$$

KRENTZ

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KDDC [030155]: Preliminary Local Storm Report...summary

NWUS53 KDDC 030155
LSRDDC

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DODGE CITY KS
854 PM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0440 PM TSTM WND GST 2 NW ULYSSES 37.60N 101.38W
09/02/2011 M60.00 MPH GRANT KS MESONET

0515 PM TSTM WND DMG 4 NW HICKOK 37.60N 101.29W
09/02/2011 GRANT KS TRAINED SPOTTER

SPOTTER REPORTED A SNAPPED POWER POLE 3 MILES EAST OF
ULYSSES ON ROAD M JUST OFF OF HIGHWAY 160.

0611 PM HAIL 6 SE JOHNSON CITY 37.50N 101.69W
09/02/2011 E1.00 INCH STANTON KS PUBLIC

0700 PM HAIL 9 S MANTER 37.39N 101.89W
09/02/2011 E1.00 INCH STANTON KS PUBLIC

&&

$$

MSCOTT

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KRNK [030117]: Preliminary Local Storm Report...summary

NWUS51 KRNK 030117
LSRRNK

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE BLACKSBURG VA
917 PM EDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0236 PM TSTM WND DMG 3 SSE MC DONALDS MILL 37.26N 80.26W
09/02/2011 MONTGOMERY VA 911 CALL CENTER

POWER LINES DOWN ALONG BRADSHAW ROAD.

0249 PM TSTM WND DMG 6 NNE SHAWSVILLE 37.24N 80.22W
09/02/2011 MONTGOMERY VA 911 CALL CENTER

TREE BLOWN DOWN ONTO POWER LINES ALONG NORTH FORK ROAD.

0316 PM TSTM WND DMG PILOT MOUNTAIN 36.38N 80.47W
09/02/2011 SURRY NC 911 CALL CENTER

SEVERAL POWER LINES DOWN NEAR THE PILOT MOUNTAIN FIRE
DEPARTMENT.

0320 PM TSTM WND DMG 1 WSW PILOT MOUNTAIN 36.38N 80.48W
09/02/2011 SURRY NC PUBLIC

LARGE STORE SIGN BLOWN DOWN AS WELL AS OUTDOOR STORE
RACKS BLOWN AWAY. TREE ALSO DOWN IN THE AREA.

0320 PM HAIL 1 WSW PILOT MOUNTAIN 36.38N 80.48W
09/02/2011 E1.00 INCH SURRY NC PUBLIC

0324 PM TSTM WND DMG ESE PILOT MOUNTAIN 36.38N 80.47W
09/02/2011 SURRY NC 911 CALL CENTER

TREE DOWN ON E. PINE STREET.

0335 PM TSTM WND DMG 2 W SALEM CITY 37.29N 80.09W
09/02/2011 CITY OF SALEM VA TRAINED SPOTTER

PART OF LARGE SIGN BLOWN OUT BY THE WIND. ALSO HAD DIME
SIZED HAIL.

0339 PM HAIL 2 W SALEM CITY 37.29N 80.09W
09/02/2011 E1.00 INCH CITY OF SALEM VA PUBLIC

QUARTER SIZE HAIL COVERING THE GROUND.

0341 PM TSTM WND DMG 4 SE ARARAT 36.56N 80.47W
09/02/2011 PATRICK VA 911 CALL CENTER

SEVERAL TREES DOWN IN THE CLAUDVILLE HIGHWAY AND HATCHERS
CHAPEL ROAD AREA.

0346 PM TSTM WND DMG SANDY RIDGE 36.50N 80.12W
09/02/2011 STOKES NC 911 CALL CENTER

NUMEROUS TREES DOWN.

0350 PM TSTM WND DMG 2 WSW PILOT MOUNTAIN 36.38N 80.51W
09/02/2011 SURRY NC 911 CALL CENTER

TREE DOWN NEAR THE INTERSECTION OF DODSON MILL ROAD AND
WHITAKER CHAPEL ROAD.

0355 PM HAIL 5 WNW ROANOKE 37.30N 80.05W
09/02/2011 E1.00 INCH CITY OF SALEM VA PUBLIC

QUARTER SIZE HAIL FELL IN THE 400 BLOCK OF HIGH STREET.

0359 PM TSTM WND DMG 3 ESE LEVEL CROSS 36.34N 80.57W
09/02/2011 SURRY NC 911 CALL CENTER

TREE DOWN ON STANFORD CHURCH ROAD.

0359 PM TSTM WND DMG 1 ENE LEVEL CROSS 36.35N 80.62W
09/02/2011 SURRY NC 911 CALL CENTER

TREE DOWN ALONG PRATT ROAD.

0400 PM TSTM WND DMG 6 W ROANOKE 37.29N 80.06W
09/02/2011 CITY OF SALEM VA PUBLIC

MARBLE SIZE HAIL AND SEVERAL LARGE LIMBS DOWN ON WEST 4TH
STREET.

0401 PM TSTM WND DMG ENE LEVEL CROSS 36.35N 80.63W
09/02/2011 SURRY NC 911 CALL CENTER

POWER LINE DOWN ALONG GREENE ROAD.

0403 PM TSTM WND DMG 6 W PILOT MOUNTAIN 36.37N 80.57W
09/02/2011 SURRY NC 911 CALL CENTER

TREE DOWN ON ELDORA ROAD.

0405 PM TSTM WND DMG 5 WNW ROANOKE 37.30N 80.05W
09/02/2011 CITY OF SALEM VA POST OFFICE

DAMAGING THUNDERSTORM WINDS BLEW TWO TREES DOWN AND
BROUGHT DOWN MANY LIMBS...SOME UP TO EIGHT INCHES IN
DIAMETER...IN THE 400 BLOCK OF HIGH STREET.

0405 PM TSTM WND DMG 4 WSW PILOT MOUNTAIN 36.37N 80.55W
09/02/2011 SURRY NC 911 CALL CENTER

SEVERAL TREES DOWN IN THE BRYANT MILL ROAD AREA.

0408 PM TSTM WND GST 5 W ROANOKE 37.28N 80.04W
09/02/2011 M66.00 MPH CITY OF SALEM VA MESONET

AT SALEM CIVIC CENTER.

0409 PM TSTM WND DMG 1 WSW ARARAT 36.40N 80.59W
09/02/2011 SURRY NC 911 CALL CENTER

TREE DOWN ON HOMEPLACE PARK ROAD.

0411 PM TSTM WND DMG 3 NNW SILOAM 36.33N 80.58W
09/02/2011 SURRY NC 911 CALL CENTER

TREE DOWN ON JAY MAX LANE.

0420 PM TSTM WND DMG SSE LEVEL CROSS 36.34N 80.63W
09/02/2011 SURRY NC 911 CALL CENTER

TREE DOWN ALONG HIGHWAY 268.

0424 PM HAIL HOLLINS 37.34N 79.95W
09/02/2011 E1.00 INCH ROANOKE VA PUBLIC

0424 PM TSTM WND DMG 4 S DOBSON 36.33N 80.72W
09/02/2011 SURRY NC 911 CALL CENTER

TREE DOWN NEAR THE INTERSECTION OF HIGHWAY 268 AND U.S.
601.

0424 PM TSTM WND DMG 3 N SILOAM 36.32N 80.57W
09/02/2011 SURRY NC 911 CALL CENTER

TREE DOWN ON QUAKER CHURCH ROAD.

0425 PM HAIL 2 NNW ROANOKE 37.31N 79.98W
09/02/2011 M1.00 INCH CITY OF ROANOKE VA BROADCAST MEDIA

0437 PM TSTM WND DMG 5 NNW ARARAT 36.67N 80.55W
09/02/2011 CARROLL VA 911 CALL CENTER

TREE DOWN ON KENO RD IN LAUREL FORK AREA

0437 PM TSTM WND DMG 3 NNW BOONVILLE 36.27N 80.73W
09/02/2011 SURRY NC 911 CALL CENTER

TREE DOWN ALONG U.S. 601.

0438 PM HAIL 1 SSW ROANOKE 37.26N 79.97W
09/02/2011 E1.00 INCH CITY OF ROANOKE VA PUBLIC

QUARTER SIZE HAIL AND A LARGE LIMB DOWN ON WINDSOR
AVENUE.

0445 PM TSTM WND DMG 4 WSW SPENCER 36.59N 80.09W
09/02/2011 PATRICK VA 911 CALL CENTER

TREE DOWN ON GOLF COURSE ROAD.

0500 PM TSTM WND DMG YADKINVILLE 36.13N 80.66W
09/02/2011 YADKIN NC 911 CALL CENTER

TREES DOWN ON A POWER LINE ON HOOTS ROAD...WHICH THEN
FELL ON A HOUSE AND HAS TRAPPED PEOPLE INSIDE.

0502 PM TSTM WND DMG 6 NE DANBURY 36.46N 80.13W
09/02/2011 STOKES NC DEPT OF HIGHWAYS

TREE DOWN ON TOM SHELTON ROAD.

0505 PM TSTM WND DMG 5 SSE YADKINVILLE 36.06N 80.63W
09/02/2011 YADKIN NC 911 CALL CENTER

SEVERAL TREES DOWN IN THE COURTNEY AREA

0508 PM TSTM WND DMG 2 WSW FRANCISCO 36.48N 80.40W
09/02/2011 STOKES NC 911 CALL CENTER

TREE BLOWN DOWN ONTO POWER LINE.

0511 PM TSTM WND DMG 6 N PILOT MOUNTAIN 36.46N 80.46W
09/02/2011 SURRY NC 911 CALL CENTER

POWER LINES DOWN.

0515 PM TSTM WND DMG 5 NNW PILOT MOUNTAIN 36.45N 80.50W
09/02/2011 SURRY NC 911 CALL CENTER

TREE DOWN ON COOK SCHOOL ROAD.

0524 PM TSTM WND DMG 3 W PILOT MOUNTAIN 36.39N 80.53W
09/02/2011 SURRY NC 911 CALL CENTER

TREE DOWN ON TOMS CREEK ROAD.

0524 PM TSTM WND DMG 1 SSW BOTTOM 36.47N 80.78W
09/02/2011 SURRY NC 911 CALL CENTER

TREE DOWN ON NEAL ROAD.

0524 PM TSTM WND DMG 5 W PILOT MOUNTAIN 36.39N 80.56W
09/02/2011 SURRY NC 911 CALL CENTER

TREE DOWN ON CHILTON ROAD.

0524 PM TSTM WND DMG 2 WSW ARARAT 36.39N 80.60W
09/02/2011 SURRY NC 911 CALL CENTER

TREE DOWN ON KEY ROAD.

0528 PM TSTM WND DMG 4 WSW PILOT MOUNTAIN 36.36N 80.54W
09/02/2011 SURRY NC 911 CALL CENTER

TREE DOWN ON PILOT POWER DAM ROAD.

0530 PM TSTM WND DMG 2 SSE GALAX CITY 36.64N 80.91W
09/02/2011 GRAYSON VA TRAINED SPOTTER

SEVERAL TREES AND POWER LINES DOWN ON PIPERS GAP ROAD
BETWEEN ROUTE 89 AND TOWER ROAD. TWO POWER POLES ALSO
SNAPPED.

0532 PM TSTM WND DMG 1 SE MOUNT AIRY 36.49N 80.60W
09/02/2011 SURRY NC 911 CALL CENTER

TREE DOWN ON POND VALLEY ROAD.

0540 PM TSTM WND DMG GALAX CITY 36.67N 80.92W
09/02/2011 CITY OF GALAX VA FIRE DEPT/RESCUE

NUMEROUS TREES DOWN NEAR THE INTERSECTION OF GLENDALE
ROAD AND COUNTRY CLUB LANE AND THE INTERSECTION OF WEST
STUART AND MOUNTAIN VIEW ROADS.

0545 PM TSTM WND DMG 3 N KING 36.32N 80.35W
09/02/2011 STOKES NC 911 CALL CENTER

TREE DOWN ON CHESTNUT GROVE ROAD AND YMCA CAMP ROAD.

0550 PM TSTM WND DMG 1 SE TRAPHILL 36.34N 81.02W
09/02/2011 WILKES NC 911 CALL CENTER

TREE DOWN AT THE 10000 BLOCK OF AUSTIN TRAPHILL ROAD.

0550 PM TSTM WND DMG 3 W RONDA 36.22N 81.00W
09/02/2011 WILKES NC 911 CALL CENTER

TREE DOWN ON WHITE PLAINS ROAD.

0605 PM TSTM WND DMG 5 ENE BOOMER 36.10N 81.18W
09/02/2011 WILKES NC 911 CALL CENTER

TREE DOWN ON CEMETARY ROAD.

0610 PM TSTM WND DMG 3 SW TRAPHILL 36.31N 81.07W
09/02/2011 WILKES NC 911 CALL CENTER

TREE DOWN AT THE 7000 BLOCK OF TRAPHILL ROAD.

0610 PM TSTM WND DMG MULBERRY 36.23N 81.17W
09/02/2011 WILKES NC 911 CALL CENTER

TREE DOWN

0615 PM TSTM WND DMG 4 SW RONDA 36.18N 80.99W
09/02/2011 WILKES NC 911 CALL CENTER

TREE DOWN ON RED WHITE AND BLUE ROAD.

0632 PM TSTM WND DMG 5 ESE MOUTH OF WILSON 36.55N 81.24W
09/02/2011 ALLEGHANY NC TRAINED SPOTTER

TREE DOWN BLOCKING HIGHWAY 93.

0636 PM TSTM WND DMG TWIN OAKS 36.53N 81.17W
09/02/2011 ALLEGHANY NC PUBLIC

TREES DOWN.

0636 PM TSTM WND DMG 3 SE MOUTH OF WILSON 36.55N 81.30W
09/02/2011 ALLEGHANY NC TRAINED SPOTTER

TREE DOWN BLOCKING HIGHWAY 113 IN PINEY CREEK.

0648 PM TSTM WND DMG 3 N LAUREL SPRINGS 36.46N 81.27W
09/02/2011 ALLEGHANY NC TRAINED SPOTTER

TREES DOWN ON NEW HOPE CHURCH ROAD.

0650 PM TSTM WND DMG 5 S MOUTH OF WILSON 36.51N 81.35W
09/02/2011 ASHE NC 911 CALL CENTER

TREE DOWN AT 900 GEORGE MCMILAN ROAD BLOCKING THE ROAD.

&&

$$

CHENARD

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KGSP [030118]: Preliminary Local Storm Report

NWUS52 KGSP 030118
LSRGSP

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
917 PM EDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0646 PM TSTM WND DMG ELLENDALE 35.93N 81.28W
09/02/2011 ALEXANDER NC 911 CALL CENTER

MANY TREES DOWN.

&&

$$

KRENTZ

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KGSP [030114]: Preliminary Local Storm Report

NWUS52 KGSP 030114
LSRGSP

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
914 PM EDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0820 PM TSTM WND DMG 1 SW TERRELL 35.58N 80.99W
09/02/2011 CATAWBA NC BROADCAST MEDIA

MATURE HARDWOODS SNAPPED. PUBLIC REPORT RELAYED FROM
MEDIA.

&&

$$

CSH

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KGSP [030106]: Preliminary Local Storm Report

NWUS52 KGSP 030106
LSRGSP

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
905 PM EDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0753 PM TSTM WND DMG BANNER ELK 36.16N 81.87W
09/02/2011 AVERY NC 911 CALL CENTER

ONE TREE DOWN

&&

$$

KRENTZ

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KARX [021336]: Preliminary Local Storm Report

NWUS53 KARX 021336
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
836 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0750 AM TSTM WND DMG COON VALLEY 43.70N 91.01W
09/02/2011 VERNON WI LAW ENFORCEMENT

LOTS OF DOWNED TREES AND POWER LINES AND ALSO IN
CHASEBURG AND STODDARD.

0821 AM TSTM WND DMG 10 N MAUSTON 43.95N 90.08W
09/02/2011 JUNEAU WI TRAINED SPOTTER

TREES DOWN NEAR SANDSTONE ESTATES. ONE FELL ON TRAILER IN
TRAILER PARK.

&&

$$

SHEA

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KARX [021335]: Preliminary Local Storm Report

NWUS53 KARX 021335
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
835 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0718 AM TSTM WND DMG TREMPEALEAU 44.01N 91.44W
09/02/2011 TREMPEALEAU WI PUBLIC

LARGE TREES DOWN ACROSS ROADWAYS AND ON POWER LINES

&&

$$

ZT

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KARX [021327]: Preliminary Local Storm Report

NWUS53 KARX 021327
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
827 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0820 AM TSTM WND DMG 2 S NECEDAH 44.00N 90.07W
09/02/2011 JUNEAU WI TRAINED SPOTTER

JACK PINES SNAPPING FROM WIND GUSTS ESTIMATED AT 50 MPH.

0825 AM TSTM WND DMG DELLWOOD 43.97N 89.96W
09/02/2011 ADAMS WI AMATEUR RADIO

SIX INCH TREES BLOWING DOWN FROM WINDS ESTIMATED AT 60
MPH IN WESTERN ADAMS COUNTY NEAR CASTLE ROCK PARK.

&&

$$

SHEA

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KDMX [021322]: Preliminary Local Storm Report

NWUS53 KDMX 021322
LSRDMX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
818 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0544 AM TSTM WND DMG 4 ENE NORTHWOOD 43.47N 93.14W
09/02/2011 WORTH IA TRAINED SPOTTER

TREES AND POWERLINES DOWN. WINDS ESTIMATED AT 60 MPH.
PENNY SIZED HAIL ALSO OBSERVED.

&&

$$

SKOW

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KARX [021320]: Preliminary Local Storm Report

NWUS53 KARX 021320
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
820 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0810 AM TSTM WND GST VOLK FIELD 43.93N 90.27W
09/02/2011 M52 MPH JUNEAU WI AWOS

&&

$$

SHEA

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KARX [021314]: Preliminary Local Storm Report

NWUS53 KARX 021314
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
814 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0630 AM TSTM WND GST CHESTER 43.49N 92.36W
09/02/2011 E70 MPH HOWARD IA FIRE DEPT/RESCUE

POWERLINES DOWN SOUTHSIDE OF CHESTER.

&&

$$

ZT

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KARX [021313]: Preliminary Local Storm Report

NWUS53 KARX 021313
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
813 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0759 AM TSTM WND DMG 3 SW NORWALK 43.80N 90.67W
09/02/2011 MONROE WI TRAINED SPOTTER

TREE DOWN ON MOBILE HOME

&&

$$

SHEA

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KARX [021309]: Preliminary Local Storm Report

NWUS53 KARX 021309
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
809 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0802 AM TSTM WND GST TOMAH 43.99N 90.50W
09/02/2011 E60 MPH MONROE WI TRAINED SPOTTER

&&

$$

SHEA

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KARX [021307]: Preliminary Local Storm Report

NWUS53 KARX 021307
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
807 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0752 AM TSTM WND DMG 4 E CATARACT 44.09N 90.75W
09/02/2011 MONROE WI TRAINED SPOTTER

SEVERAL LARGE TREES DOWN ALONG COUNTY ROAD II

&&

$$

SHEA

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KARX [021307]: Preliminary Local Storm Report

NWUS53 KARX 021307
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
807 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0740 AM TSTM WND DMG 3 SE LA CROSSE 43.80N 91.19W
09/02/2011 LA CROSSE WI NWS EMPLOYEE

MULTIPLE TREES DOWN ON 16TH AND SOUTH AVE AND AREAS
NORTHWARD. MOST ARE 1 TO 2 FOOT DIAMETER

&&

$$

ZT

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KARX [021300]: Preliminary Local Storm Report

NWUS53 KARX 021300
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
800 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0756 AM TSTM WND GST 4 E CATARACT 44.09N 90.75W
09/02/2011 E60 MPH MONROE WI TRAINED SPOTTER

0756 AM TSTM WND GST FORT MC COY 44.02N 90.68W
09/02/2011 E45 MPH MONROE WI TRAINED SPOTTER

ALONG JACKSON PASS ON HIGHWAY 16

&&

$$

SHEA

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 021257
SWODY1
SPC AC 021255

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0755 AM CDT FRI SEP 02 2011

VALID 021300Z - 031200Z

...THERE IS A SLGT RISK OF SVR TSTMS FROM NEB AND IA ENE INTO
WI...NRN IL...AND MI...

...SYNOPSIS...
BROAD CYCLONIC FLOW WILL PREVAIL FROM SW CANADA AND THE NRN RCKYS
EWD INTO ONT...WRN QUE...AND THE UPR GRT LKS THROUGH EARLY
SAT...POLEWARD OF UPR HIGH CENTERS OVER THE SRN RCKYS AND THE OH
VLY. TWO IMPULSES IN THE CYCLONIC FLOW...ONE NOW OVER NRN MN AND
THE OTHER OVER NW MT...WILL IMPACT STRONG TO POTENTIALLY SVR TSTM
DEVELOPMENT THIS PERIOD.

BETWEEN THE ANTICYCLONES...UPR LOW NOW OVER THE NWRN GULF OF MEXICO
SHOULD REMAIN MORE OR LESS STNRY NEAR THE SW LA CST. THE LOW WILL
INTERACT WITH T.D. 13 THAT...ATTM...REMAINS LOOSELY ORGANIZED OVER
THE GULF S OF THE CNTRL LA CST.

AT THE SFC...COLD FRONT ASSOCIATED WITH MN IMPULSE SHOULD WEAKEN AS
IT SETTLES FARTHER SE ACROSS THE MID MS VLY/UPR GRT LKS LATER TODAY.
A NEW...STRONGER COLD FRONT WILL REACH WRN ND EARLY TNGT...IN
ADVANCE OF MT UPR DISTURBANCE. THIS FRONT SHOULD CONTINUE E/SE
ACROSS THE NRN HALF OF THE PLNS AND UPR MS VLY BY 12Z SAT.
...NEB/IA INTO WI/IL/MI TODAY THROUGH TNGT...
SEVERAL ROUNDS OF STRONG TO OCCASIONALLY SVR TSTMS EXPECTED TO
PERSIST INVOF STALLING FRONTAL ZONE FROM THE CNTRL PLNS ENE INTO
WI/IL/MI THIS PERIOD AS MOIST AXIS /PW AOA 1.75 INCHES/ PERSISTS
BENEATH BELT OF ENHANCED WSW FLOW IMMEDIATELY TOPPING OH VLY RIDGE.

IN THE NEAR TERM...IT APPEARS THAT ONGOING STRONG/SVR TSTM CLUSTER
NOW IN SW WI WILL CONTINUE TO BE ENHANCED BY ASCENT ASSOCIATED WITH
NRN MN UPR IMPULSE. THE STORMS MAY REMAIN STG/SVR ENEWD ACROSS THE
REMAINDER OF WI.

AS THE MN DISTURBANCE CONTINUES NEWD INTO ONT LATER TODAY...LARGE
SCALE FORCING WILL DIMINISH OVER THE MID/UPR MS AND MID MO VLYS.
BUT SFC HEATING AND CONTINUING PRESENCE OF FAIRLY STEEP MID LVL
LAPSE RATES/LOW LVL MOISTURE PLUME SHOULD SUPPORT SCTD AREAS OF
STORMS BY MID TO LATE AFTN ON SRN FRINGE OF FRONTAL BAND
CLOUDS...AND/OR ALONG OUTFLOW BOUNDARIES FROM OVERNIGHT
ACTIVITY...FROM ERN NEB ENE INTO IA/SRN WI AND NRN IL. GIVEN 25-30
KT WSWLY MEAN CLOUD LAYER FLOW AND SBCAPE RANGING FROM 2500-3500
J/KG...SETUP MAY SUPPORT A FEW BOWING SEGMENTS/SUSTAINED STORMS WITH
LOCALLY SVR WIND/HAIL. ADDITIONAL SPORADIC ROUNDS OF STRONG TO
POSSIBLY SVR STORMS MAY PERSIST INTO THE OVERNIGHT ACROSS MUCH THE
SAME REGION AS LLJ STRENGTHENS BOTH DIURNALLY..AND IN RESPONSE TO
THE APPROACH OF MT/ND UPR TROUGH.

...CNTRL HI PLNS THIS AFTN/EVE...
MODERATE INSTABILITY /MUCAPE TO 1500 J PER KG/ WILL DEVELOP TODAY
OVER PARTS OF THE CNTRL HI PLNS...ALONG AND N OF LEAD COLD FRONT AS
THAT BOUNDARY BECOMES STNRY AND WEAKENS OVER NW KS/ERN CO.
POST-FRONTAL MOISTURE ADVECTION/UPSLOPE FLOW...AND STRONG SFC
HEATING...SHOULD SUPPORT ISOLD TO WDLY SCTD AFTN STORMS. WEAK
NEAR-SFC WINDS WILL LIMIT MAGNITUDE OF LOW-LEVEL SPEED/DIRECTIONAL.
BUT ERN CO WILL LIE BENEATH BELT OF ENHANCED FLOW TOPPING THE SRN
RCKYS UPR RIDGE...SUPPORTING UP TO 30-40 KTS WLY CLOUD LAYER SHEAR.
THIS SETUP MAY YIELD A FEW MULTICELLS AND MARGINAL SUPERCELLS WITH
SVR HAIL AND...GIVEN DEEPLY MIXED PBL...DMGG WIND GUSTS.

...CNTRL APPALACHIANS AND ADJACENT PIEDMONT THIS AFTN/EVE...
WDLY SCTD TO SCTD TSTMS EXPECTED TO FORM WITH SFC HEATING THIS AFTN
OVER THE HIGHER TERRAIN OF THE CNTRL APPALACHIANS. DEVELOPMENT MAY
BE AUGMENTED BY CONVERGENCE ALONG WEAK WARM/STNRY FRONT STALLED OVER
THE REGION. THE STORMS SHOULD MOVE GENERALLY S WITHIN MODERATE NLY
FLOW ON WRN FRINGE OF OFFSHORE UPR TROUGH. RELATIVELY STEEP MID LVL
LAPSE RATES AND SEASONABLY STRONG MEAN FLOW MAY SUPPORT ORGANIZATION
INTO A FEW SMALL CLUSTERS CAPABLE OF LOCALLY DMGG WIND AND PERHAPS
MARGINALLY SVR HAIL THROUGH EARLY THIS EVE.

...CNTRL GULF CST LATER TODAY THROUGH TNGT...
MOIST...CYCLONICALLY CURVED LLJ SHOULD GRADUALLY STRENGTHEN OVER THE
CNTRL GULF CST REGION AS T.D. 13 GRADUALLY MOVES NWD TOWARD THE
CNTRL LA CST PER NHC. GRADUALLY ENLARGING HODOGRAPHS MAY ULTIMATELY
YIELD A CONDITIONAL TORNADO POTENTIAL GIVEN THE PRESENCE OF
SUSTAINED DISCRETE SHOWERS/STORMS. WHILE CLOUD COVER WILL LIMIT LOW
LVL DESTABILIZATION...INSTABILITY MAY BE ENHANCED BY PROXIMITY OF
UPR LOW IN THE NWRN GULF. WHILE THE TORNADO
THREAT ATTM APPEARS TOO ISOLD/CONDITIONAL FOR INTRODUCTION OF A
CATEGORICAL SVR OTLK...AN UPGRADE MAY BE NEEDED IF THE PROSPECTS FOR
DISCRETE STORMS AND SUBSTANTIAL STRENGTHENING OF T.D. 13 BECOME
APPARENT LATER TODAY.

...NRN PLNS...
ISOLD STORMS WITH A POTENTIAL FOR LOCALLY DMGG WIND MAY DEVELOP LATE
THIS AFTN THROUGH EARLY TNGT OVER WRN/NRN ND AS FORCING FOR ASCENT
INCREASES INVOF OF STRAIGHTENING COLD FRONT AHEAD OF MT TROUGH.
WHILE MOISTURE WILL BE LIMITED...STEEP LOW TO MID LVL LAPSE RATES
WILL YIELD AMPLE STATIC INSTABILITY FOR STRONG UPDRAFTS/DOWNDRAFTS.

..CORFIDI/GARNER.. 09/02/2011

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KARX [021257]: Preliminary Local Storm Report

NWUS53 KARX 021257
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
757 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0726 AM TSTM WND GST ONALASKA 43.89N 91.22W
09/02/2011 M62 MPH LA CROSSE WI PUBLIC

&&

$$

ZT

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KARX [021254]: Preliminary Local Storm Report

NWUS53 KARX 021254
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
754 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0740 AM TSTM WND DMG STODDARD 43.66N 91.22W
09/02/2011 VERNON WI LAW ENFORCEMENT

NUMEROUS REPORTS OF TREES DOWN AND POWER OUTAGES. DAMAGE
ALSO REPORTED BETWEEN STODDARD AND GENOA.

&&

$$

SHEA

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WATCHES: Severe Thunderstorm Watch Number 822

WWUS20 KWNS 021251
SEL2
SPC WW 021251
WIZ000-LMZ000-021600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 822
NWS STORM PREDICTION CENTER NORMAN OK
750 AM CDT FRI SEP 2 2011

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

SOUTHERN AND CENTRAL WISCONSIN
LAKE MICHIGAN

EFFECTIVE THIS FRIDAY MORNING FROM 750 AM UNTIL 1100 AM CDT.

HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 40
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 85 MILES WEST OF
OSHKOSH WISCONSIN TO 35 MILES EAST OF OSHKOSH WISCONSIN. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU2).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 821...

DISCUSSION...SMALL FAST MOVING MCS CLUSTER WILL CONTINUE TO POSE A
THREAT FOR ISOLATED WIND DAMAGE AS IT ADVANCES THROUGH THE
MODERATELY UNSTABLE ENVIRONMENT WITH STEEP LOW-MID LEVEL LAPSE RATES
ACROSS CNTRL AND SRN WI EARLY THIS MORNING.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 26050.

...DIAL

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KARX [021249]: Preliminary Local Storm Report

NWUS53 KARX 021249
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
749 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0747 AM TSTM WND GST SPARTA 43.94N 90.81W
09/02/2011 E45 MPH MONROE WI TRAINED SPOTTER

&&

$$

SHEA

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KARX [021248]: Preliminary Local Storm Report

NWUS53 KARX 021248
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
747 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0730 AM TSTM WND DMG DECORAH 43.31N 91.79W
09/02/2011 WINNESHIEK IA LAW ENFORCEMENT

NUMEROUS BRANCHES AND SMALL TREES DOWN IN AND NEAR
DECORAH. SEVERAL LARGE TREES DOWN ACROSS HIGHWAY 139 NEAR
KENDALLVILLE

&&

$$

DAS

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KARX [021246]: Preliminary Local Storm Report

NWUS53 KARX 021246 CCA
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
743 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0726 AM TSTM WND GST 4 N LA CROSSE 43.88N 91.23W
09/02/2011 M63 MPH LA CROSSE WI ASOS

MEASURED AT LA CROSSE AIRPORT.

&&

$$

ZT

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KARX [021244]: Preliminary Local Storm Report

NWUS53 KARX 021244
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
743 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0738 AM TSTM WND GST 4 N LA CROSSE 43.88N 91.23W
09/02/2011 M63 MPH LA CROSSE WI ASOS

MEASURED AT LA CROSSE AIRPORT.

&&

$$

ZT

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KARX [021239]: Preliminary Local Storm Report

NWUS53 KARX 021239
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
739 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0730 AM TSTM WND GST 3 E LA CROSSE 43.83N 91.17W
09/02/2011 M52 MPH LA CROSSE WI CO-OP OBSERVER

MEASURED AT NWS LA CROSSE OFFICE

&&

$$

SHEA

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KARX [021238]: Preliminary Local Storm Report

NWUS53 KARX 021238
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
738 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0728 AM TSTM WND DMG LA CROSSE 43.83N 91.23W
09/02/2011 LA CROSSE WI NWS EMPLOYEE

TREES AND POWER LINES DOWN ON LOSEY BLVD/MAIN

&&

$$

ZT

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KARX [021237]: Preliminary Local Storm Report

NWUS53 KARX 021237
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
736 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0728 AM TSTM WND GST ONALASKA 43.89N 91.22W
09/02/2011 E65 MPH LA CROSSE WI PUBLIC

&&

$$

ZT

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KARX [021235]: Preliminary Local Storm Report

NWUS53 KARX 021235
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
735 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0733 AM TSTM WND GST WEST SALEM 43.90N 91.08W
09/02/2011 E60 MPH LA CROSSE WI NWS EMPLOYEE

&&

$$

SHEA

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KARX [021234]: Preliminary Local Storm Report

NWUS53 KARX 021234
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
734 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0731 AM TSTM WND GST GALESVILLE 44.08N 91.36W
09/02/2011 E60 MPH TREMPEALEAU WI EMERGENCY MNGR

0719 AM TSTM WND GST PICKWICK 43.98N 91.60W
09/02/2011 E60 MPH WINONA MN EMERGENCY MNGR

0726 AM TSTM WND GST 4 N LA CROSSE 43.88N 91.23W
09/02/2011 M63 MPH LA CROSSE WI ASOS

&&

$$

SHEA

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KARX [021231]: Preliminary Local Storm Report

NWUS53 KARX 021231
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
731 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0715 AM TSTM WND DMG 8 NE CALEDONIA 43.72N 91.39W
09/02/2011 HOUSTON MN LAW ENFORCEMENT

TREES REPORTED DOWN ALONG STATE HIGHWAY 16.

&&

$$

SHEA

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MESO: Mesoscale Discussion 2094

ACUS11 KWNS 021229
SWOMCD
SPC MCD 021229
WIZ000-IAZ000-MNZ000-021330-

MESOSCALE DISCUSSION 2094
NWS STORM PREDICTION CENTER NORMAN OK
0729 AM CDT FRI SEP 02 2011

AREAS AFFECTED...EXTREME SERN MN...NERN IA AND SRN MN

CONCERNING...SEVERE THUNDERSTORM WATCH 821...

VALID 021229Z - 021330Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 821
CONTINUES.

PRIMARY SEVERE THREAT IS EXPECTED TO REMAIN WITH LEADING STORM NOW
MOVING INTO WRN WI. THIS STORM MAY CONTINUE TO POSE A THREAT FOR A
NARROW CORRIDOR OF WIND DAMAGE AND HAIL AS IT MOVES THROUGH SRN WI
DURING THE EARLY MORNING. THIS STORM WILL MOVE EAST OF WW 821 AFTER
13Z. WW 821 MAY NEED TO BE REPLACED BY ANOTHER SEVERE THUNDERSTORM
WATCH FOR SRN WI BY 1230-1245Z.

NUMEROUS ELEVATED STORMS CONTINUE FROM NERN NEB...NRN IA AND SRN MN.
MUCH OF THE CONVECTION IS DEVELOPING WITHIN A ZONE OF POST FRONTAL
ASCENT AND SWD PROPAGATING GRAVITY WAVE. LEADING FORWARD PROPAGATING
CELL OVER EXTREME SE MN IS NEAR THE SURFACE FRONT AND MOVING EAST AT
45-50 KT. THE LLJ HAS VEERED TO WLY ACROSS SRN WI AS THE SHORTWAVE
TROUGH SHIFTS EWD TOWARD THE GREAT LAKES AND SWRN ONTARIO.
HOWEVER...THE LEADING STORM WILL CONTINUE THROUGH A MODERATELY
UNSTABLE /1500-2000 J/KG MUCAPE/ ENVIRONMENT OVER SRN WI WITH 30-35
KT EFFECTIVE SHEAR AS IT ADVANCES EWD...AND GIVEN THE STEEP LAPSE
RATES BETWEEN 900-700 MB...ACTIVITY MAY REMAIN CAPABLE OF ISOLATED
WIND DAMAGE NEXT FEW HOURS.

..DIAL.. 09/02/2011

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...GRB...MKX...ARX...

LAT...LON 43829153 44389038 44448831 44168775 43388834 43319126
43829153

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KARX [021228]: Preliminary Local Storm Report

NWUS53 KARX 021228
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
728 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0727 AM TSTM WND GST LA CROSSE 43.83N 91.23W
09/02/2011 M54 MPH LA CROSSE WI AMATEUR RADIO

MEASURED AT RADIO STATION DOWNTOWN.

&&

$$

SHEA

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KARX [021215]: Preliminary Local Storm Report

NWUS53 KARX 021215
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
715 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0710 AM TSTM WND GST 4 SW WINONA 44.01N 91.71W
09/02/2011 E60.00 MPH WINONA MN TRAINED SPOTTER

&&

$$

ZT

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KARX [021209]: Preliminary Local Storm Report

NWUS53 KARX 021209
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
709 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0700 AM TSTM WND GST 2 NE NEWBURG 43.59N 91.80W
09/02/2011 E60 MPH FILLMORE MN TRAINED SPOTTER

SEVERAL BRANCHES DOWN. OUTSIDE FURNITURE BLOWN AROUND.

&&

$$

ZT

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KARX [021207]: Preliminary Local Storm Report

NWUS53 KARX 021207
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
707 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0635 AM TSTM WND DMG SPRING VALLEY 43.69N 92.39W
09/02/2011 FILLMORE MN AMATEUR RADIO

LARGE BRANCHES DOWN IN TOWN AND ONE TREE DOWN OVER COUNTY
ROAD 1.

&&

$$

SHEA

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KARX [021202]: Preliminary Local Storm Report

NWUS53 KARX 021202
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
702 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0558 AM TSTM WND DMG ST. ANSGAR 43.38N 92.92W
09/02/2011 MITCHELL IA TRAINED SPOTTER

8-10 INCH BRANCHES DOWN. ABOVE GROUND POOL FLIPPED OVER.

&&

$$

ZT

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KARX [021146]: Preliminary Local Storm Report

NWUS53 KARX 021146
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
646 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0624 AM TSTM WND DMG CHESTER 43.49N 92.36W
09/02/2011 HOWARD IA EMERGENCY MNGR

SEVERAL POWER LINES DOWN

&&

$$

ZT

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KARX [021131]: Preliminary Local Storm Report

NWUS53 KARX 021131
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
631 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0558 AM TSTM WND DMG OSAGE 43.28N 92.81W
09/02/2011 MITCHELL IA LAW ENFORCEMENT

TREE DOWN ON HOUSE.

&&

$$

ZT

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KARX [021114]: Preliminary Local Storm Report

NWUS53 KARX 021114
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
614 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0601 AM HAIL LYLE 43.51N 92.94W
09/02/2011 E0.75 INCH MOWER MN PUBLIC

&&

$$

ZT

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KDMX [021036]: Preliminary Local Storm Report

NWUS53 KDMX 021036
LSRDMX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
536 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0525 AM TSTM WND GST 1 SE FOREST CITY 43.25N 93.62W
09/02/2011 M61 MPH HANCOCK IA AWOS

FOREST CITY AWOS MEASURED A WIND GUST OF 61 MPH AT 525
AM.

&&

$$

LEE

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KDMX [020943]: Preliminary Local Storm Report

NWUS53 KDMX 020943
LSRDMX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
443 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0431 AM HAIL 2 SSE MALLARD 42.91N 94.67W
09/02/2011 E1.50 INCH PALO ALTO IA TRAINED SPOTTER

TRAINED SPOTTER REPORTS QUARTER TO PING PONG BALL SIZED
HAIL.

&&

$$

LEE

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DAY48SVR: Nws Storm Prediction Center Norman Ok

ACUS48 KWNS 020853
SWOD48
SPC AC 020853

DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0353 AM CDT FRI SEP 02 2011

VALID 051200Z - 101200Z

MEDIUM RANGE MODEL FORECASTS START OUT THE DAY 4 TO 8 PERIOD WITH AN
UPPER-LEVEL TROUGH IN THE OH AND MS VALLEYS AND AN UPPER-LEVEL RIDGE
OVER THE ROCKIES. THE UPPER-LEVEL TROUGH AND ASSOCIATED UPPER-LEVEL
LOW IS FORECAST TO MOVE VERY SLOWLY EWD ACROSS THE GULF COAST STATES
IN THE EARLY TO MID-WEEK TIMEFRAME. AHEAD OF THE SYSTEM...STRONG
LOW-LEVEL FLOW AND ABUNDANT MOISTURE IS FORECAST IN THE ERN GULF
COAST STATES AND SC WHERE STRONG THUNDERSTORM DEVELOPMENT WILL BE
POSSIBLE EACH DAY FROM MONDAY/DAY 4 TO THURSDAY/DAY 7. IN SPITE OF
THE POSSIBILITY OF AN ISOLATED SEVERE THREAT EACH AFTERNOON AND
EVENING...PREDICTABILITY CONCERNING AN ENHANCED SEVERE THREAT
REMAINS LOW.

..BROYLES.. 09/02/2011

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WATCHES: Severe Thunderstorm Watch Number 821

WWUS20 KWNS 020851
SEL1
SPC WW 020851
IAZ000-MNZ000-WIZ000-021600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 821
NWS STORM PREDICTION CENTER NORMAN OK
350 AM CDT FRI SEP 2 2011

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

NORTHERN IOWA
SOUTH CENTRAL AND SOUTHEASTERN MINNESOTA
SOUTHWEST WISCONSIN

EFFECTIVE THIS FRIDAY MORNING FROM 350 AM UNTIL 1100 AM CDT.

HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 45
STATUTE MILES EITHER SIDE OF A LINE FROM 10 MILES SOUTH SOUTHWEST
OF SPENCER IOWA TO 45 MILES EAST SOUTHEAST OF LA CROSSE
WISCONSIN. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

DISCUSSION...CLUSTER OF TSTMS THAT HAS FORMED/STRENGTHENED OVER NW
IA IN THE PAST HOUR LIKELY IS ROOTED AROUND 800 MB...ABOVE SHALLOW
POST-COLD FRONTAL INVERSION. NEVERTHELESS...GIVEN FACT THAT CLUSTER
IS EMBEDDED IN 35 KT MEAN...DEEP...UNIDIRECTIONAL WSW FLOW...AND
WILL HAVE ACCESS TO INCREASINGLY RICH MOISTURE WITH EWD EXTENT /PW
AOA 1.50 IN/...SETUP COULD SUPPORT SMALL BOWING SEGMENTS WITH HIGH
WIND. THE STORMS SHOULD CONTINUE TO MOVE/DEVELOP E/ENE ACROSS NRN
IA AND PERHAPS SRN MN/SW WI ALONG ZONE OF INCREASING
FRONTOGENESIS/ASCENT ON S SIDE OF ND UPR IMPULSE.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 26030.

...CORFIDI

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MESO: Mesoscale Discussion 2093

ACUS11 KWNS 020827
SWOMCD
SPC MCD 020827
IAZ000-MNZ000-021000-

MESOSCALE DISCUSSION 2093
NWS STORM PREDICTION CENTER NORMAN OK
0327 AM CDT FRI SEP 02 2011

AREAS AFFECTED...NRN IA THROUGH EXTREME S-CNTRL AND SERN MN

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 020827Z - 021000Z

STORMS DEVELOPING ACROSS NRN IA AND POSSIBLY EVENTUALLY INTO SRN MN
MAY REMAIN CAPABLE OF PRODUCING ISOLATED STRONG TO DAMAGING WIND
GUSTS AND SOME HAIL NEXT 2-3 HOURS. TRENDS ARE BEING MONITORED FOR A
POSSIBLE WW.

COLD FRONT EXTENDS FROM EXTREME WRN WI SWWD THROUGH NWRN IA INTO
E-CNTRL AND SWRN NEB WHERE IT IS SURGING SWD. ELEVATED STORMS ARE
DEVELOPING WITHIN ZONE OF DEEPER POST FRONTAL ASCENT FROM NERN
NEB...SERN SD AND NWRN IA. SWLY LLJ WILL GRADUALLY SHIFT EWD THROUGH
THE UPPER MS VALLEY TONIGHT IN ASSOCIATION WITH PROGRESSIVE
SHORTWAVE TROUGH MOVING THROUGH ND. THIS FEATURE WILL HELP MAINTAIN
ISENTROPIC LIFT AND MOIST INFLOW FROM WARM SECTOR INTO THE FRONTAL
ZONE NEXT FEW HOURS. DESPITE BEING ELEVATED...STORMS ARE DEVELOPING
ALONG NRN FRINGE OF STEEP LAPSE RATE PLUME WHICH IN ADDITION TO
35-40 KT EFFECTIVE SHEAR WILL SUPPORT POTENTIAL FOR STRONGER
UPDRAFTS...ESPECIALLY AS ACTIVITY CONTINUES EAST THROUGH AXIS OF
STRONGER /1500-2000 J/KG/ MUCAPE NEXT COUPLE HOURS.

..DIAL.. 09/02/2011

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...ARX...MPX...DMX...FSD...

LAT...LON 43039614 43559467 44029302 43969199 43279154 42579502
43039614

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KFSD [020816]: Preliminary Local Storm Report

NWUS53 KFSD 020816
LSRFSD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
316 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0255 AM HAIL BRUNSVILLE 42.81N 96.27W
09/02/2011 E1.00 INCH PLYMOUTH IA TRAINED SPOTTER

&&

$$

BT

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KFSD [020804]: Preliminary Local Storm Report

NWUS53 KFSD 020804
LSRFSD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
304 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0255 AM TSTM WND GST BRUNSVILLE 42.81N 96.27W
09/02/2011 E60 MPH PLYMOUTH IA TRAINED SPOTTER

SUSTAINED WINDS OF 40 MPH AND NICKEL SIZED HAIL

&&

$$

BT

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KLBF [020734]: Preliminary Local Storm Report

NWUS53 KLBF 020734
LSRLBF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
234 AM CDT FRI SEP 02 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0215 AM TSTM WND GST 1 WNW ONEILL 42.47N 98.66W
09/02/2011 M53 MPH HOLT NE AWOS

&&

$$

BTAYLOR

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DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 020718
SWODY3
SPC AC 020716

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0216 AM CDT FRI SEP 02 2011

VALID 041200Z - 051200Z

...NERN STATES/OH VALLEY...
AN UPPER-LEVEL TROUGH IS FORECAST TO MOVE ACROSS THE UPPER MS VALLEY
SUNDAY AS A COLD FRONT ADVANCES SEWD INTO THE CNTRL AND NRN
APPALACHIAN MTNS. NUMEROUS THUNDERSTORMS ARE FORECAST TO INITIATE
ALONG THE BOUNDARY SUNDAY AFTERNOON FROM THE HUDSON RIVER VALLEY OF
ERN NY SWWD ACROSS WRN PA TO NEAR THE OH RIVER. FORECAST SOUNDINGS
ALONG THIS CORRIDOR AT 21Z SUNDAY SHOW SFC DEWPOINTS FROM 65 TO 70
F...MODERATE INSTABILITY AND ABOUT 30 KT OF DEEP LAYER SHEAR. THIS
ENVIRONMENT MAY BE SUFFICIENT FOR A SEVERE THREAT WITH THE BETTER
ORGANIZED LINE-SEGMENTS. HOWEVER...LARGE-SCALE ASCENT AND LAPSE
RATES SHOULD BE WEAK SUGGESTING ANY SEVERE THREAT SHOULD REMAIN
MARGINAL. THE STRONGEST LOW-LEVEL FLOW IS FORECAST ACROSS NEW YORK
AND NEW ENGLAND SUGGESTING THE GREATEST SEVERE THREAT MAY EXIST
THERE SUNDAY AFTERNOON.

...CNTRL GULF COAST...
THE NATIONAL HURRICANE CENTER IS FORECASTING TROPICAL DEPRESSION 13
TO BECOME A TROPICAL STORM AND MOVE INTO SRN LA SUNDAY. SOME
ROTATING STORMS WILL BE POSSIBLE EAST AND NORTHEAST OF THE TROPICAL
STORM CENTER ACROSS THE MS DELTA REGION BUT THIS IS LARGELY
DEPENDENT UPON THE TIMING OF LANDFALL. STRONG LOW-LEVEL SHEAR SHOULD
BE SUFFICIENT FOR STORM ROTATION WITH THE MORE DISCRETE CELLS
EMBEDDED IN THE RAINBANDS. ALTHOUGH A MARGINAL TORNADO THREAT COULD
EXIST SUNDAY ACROSS THE CNTRL GULF COAST...THE THREAT IS CONDITIONAL
UPON MANY FACTORS. WILL NOT INCLUDE A LOW-END PROBABILITY AT THIS
TIME.

..BROYLES.. 09/02/2011

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DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 020555
SWODY2
SPC AC 020555

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1255 AM CDT FRI SEP 02 2011

VALID 031200Z - 041200Z

...THERE IS A SLGT RISK OF SVR TSTMS ACROSS THE UPPER MS VALLEY AND
SRN GREAT LAKES...

...UPPER MS VALLEY/SRN GREAT LAKES...
AN UPPER-LEVEL TROUGH WILL MOVE INTO THE UPPER MS VALLEY SATURDAY AS
A COLD FRONT ADVANCES QUICKLY SEWD INTO THE GREAT LAKES REGION
SATURDAY AFTERNOON. A MOIST AXIS SHOULD BE IN PLACE ALONG AND TO THE
NORTHWEST OF THE FRONT FROM THE MID-MO VALLEY NEWD INTO SRN LOWER MI
WHERE MODERATE INSTABILITY IS FORECAST BY MID-AFTERNOON. SFC HEATING
AND LOW-LEVEL CONVERGENCE SHOULD RESULT IN THE INITIATION OF
NUMEROUS THUNDERSTORMS ALONG AND NORTHWEST OF THE BOUNDARY WITH A
LINE OF STORMS POSSIBLY MOVING SEWD ACROSS THE SLIGHT RISK AREA
DURING THE LATE AFTERNOON. FORECAST SOUNDINGS AT 00Z SUNDAY ALONG
THE MOIST AXIS SHOW MLCAPE VALUES FROM 1500 TO 2500 J/KG AND 30 TO
40 KT OF DEEP LAYER SHEAR SUGGESTING A SEVERE THREAT WILL EXIST AS
STORMS INCREASE IN COVERAGE. BECAUSE THE STRONGEST LOW-LEVEL
CONVERGENCE ASSOCIATED WITH THE FRONT SHOULD BE SOUTH OF THE
INSTABILITY AXIS...THE SEVERE THREAT MAY REMAIN MORE ISOLATED. A
LINEAR MODE WOULD FAVOR WIND DAMAGE AS THE MAIN THREAT.

...CNTRL HIGH PLAINS...
A COLD FRONT WILL MOVE SWD ACROSS THE CNTRL HIGH PLAINS SATURDAY AND
SHOULD BE LOCATED IN NERN NM...THE NRN TX PANHANDLE AND SW KS BY
LATE AFTERNOON. THUNDERSTORMS ARE FORECAST TO DEVELOP ALONG THE
BOUNDARY WITH THE STRONGEST CONVECTION REMAINING CLOSE TO THE HIGH
TERRAIN IN SE CO AND NE NM WHERE MID-LEVEL LAPSE RATES WILL BE
STEEPER THAN AREAS TO THE EAST. FORECAST SOUNDINGS IN SE CO AND NERN
NM AT 00Z SUNDAY SHOW 1000 J/KG OF MLCAPE AND 35 KT OF 0-6 KM SHEAR
SUGGESTING A HAIL AND ISOLATED WIND DAMAGE THREAT WILL BE POSSIBLE.
HOWEVER...LIMITED LARGE-SCALE ASCENT SHOULD REDUCE THE THREAT
SOMEWHAT.

...CNTRL GULF COAST...
THE NATIONAL HURRICANE CENTER IS FORECASTING TROPICAL STORM 13 TO
BECOME A TROPICAL STORM AND MOVE NWD TOWARD THE COAST OF SRN LA
SATURDAY. HEAVY RAINBANDS SHOULD EXTEND NEWD AND EWD FROM THE STORM
CENTER ACROSS THE MS DELTA REGION. FORECAST SOUNDINGS SATURDAY IN
THE MS DELTA REGION SHOW STRONG LOW-LEVEL SHEAR WHICH SHOULD ENABLE
STORM ROTATION WITH THE STRONGER CELLS EMBEDDED IN THE RAINBANDS. A
MARGINAL TORNADO THREAT COULD DEVELOP ACROSS THE MS DELTA REGION BUT
THE THREAT COULD DEPEND ON WHETHER DISCRETE STORMS CAN DEVELOP. DUE
TO THE ABUNDANT CLOUD COVER AND WIDESPREAD RAINFALL...INSTABILITY IS
FORECAST TO REMAIN RELATIVELY WEAK KEEPING ANY TORNADO THREAT
MARGINAL.

..BROYLES.. 09/02/2011

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 020554
SWODY1
SPC AC 020552

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1252 AM CDT FRI SEP 02 2011

VALID 021200Z - 031200Z

...THERE IS A SLGT RISK OF SVR TSTMS PORTIONS ERN NEB TO WI SHORE OF
LM...

...SYNOPSIS...
IN MID-UPPER LEVELS...GEN REGIME OF NRN-STREAM TROUGHING OVER NRN
PLAINS WILL CONTINUE...AS SHORTWAVE TROUGHS MOVE THROUGH CYCLONIC
FLOW FIELD. POSITIVELY TILTED SHORTWAVE TROUGH NOW OVER ERN MT IS
EXPECTED TO EJECT NEWD FROM NRN MN ACROSS NRN ONT EARLY IN
PERIOD...WHILE DEAMPLIFYING. MEANWHILE...UPSTREAM SHORTWAVE TROUGH
-- NOW EVIDENT IN MOISTURE CHANNEL IMAGERY OVER CANADIAN ROCKIES
SHOULD EVOLVE NEARLY CLOSED 500-MB LOW OVER S-CENTRAL/SWRN SK BY
3/00Z...WITH TROUGH SWD OVER ERN MT. BY END OF PERIOD...TROUGH
SHOULD REACH SRN MB...WRN/CENTRAL ND AND NERN WY/WRN SD REGION.

AT SFC...COLD FRONT ASSOCIATED WITH FIRST NRN-STREAM SHORTWAVE
TROUGH IS EXPECTED TO CROSS UPPER MS VALLEY...MOVING TO NRN LOWER
MI...SWRN WI...CENTRAL IA..AND CENTRAL/SWRN KS BY 3/00Z. FRONT
SHOULD WEAKEN AND BECOME QUASISTATIONARY FROM NRN IL TO CENTRAL-WRN
KS BY END OF PERIOD. MEANWHILE...STRENGTHENING COLD
FRONT...PRECEDING SECOND NRN-STREAM SHORTWAVE...WILL MOVE SEWD
ACROSS NRN PLAINS TO NEAR ERN DAKOTAS...WRN NEB AND NERN CO BY
3/12Z.

...NEB TO UPPER GREAT LAKES...
CATEGORICAL OUTLOOK AREA REPRESENTS RELATIVELY DENSE CONCENTRATION
OF FCST CONVECTION JUXTAPOSED WITH FRONTAL LIFT AND LARGE BUOYANCY.
DOMINANT MODE SHOULD BE MULTICELLULAR...WITH DAMAGING GUSTS AND
LARGE HAIL BEING MAIN CONCERNS. SCATTERED TO LOCALLY NUMEROUS TSTMS
SHOULD DEVELOP IN THIS SWATH THIS AFTERNOON...AS SFC COLD FRONT
IMPINGES UPON CORRIDOR OF STG SFC HEATING AND FAVORABLE LOW-LEVEL
MOISTURE. VEERED AND RATHER WEAK SFC FLOW IN ADJOINING WARM-SECTOR
WILL LIMIT SHEAR THROUGH 0-1...0-3 AND 0-6 KM AGL LAYERS.
HOWEVER...BACKED/NELY WINDS ON IMMEDIATE N SIDE OF FRONT MAY
COINCIDE WITH SFC-BASED EFFECTIVE INFLOW PARCELS ENOUGH TO LENGTHEN
CONVECTIVELY ACCESSIBLE HODOGRAPHS AND DEEP-LAYER SHEAR
VECTORS...CONTRIBUTING TO POTENTIAL TSTM ORGANIZATION. WEAKER
MOISTURE MAKES SVR POTENTIAL MORE ISOLATED/CONDITIONAL FARTHER
W...WHILE LOWER MAGNITUDES OF BUOYANCY AND CONVERGENCE ARE EXPECTED
FROM LM ENEWD.

...CENTRAL HIGH PLAINS...
POSTFRONTAL ADVECTION OF MOIST AIR ATOP HIGHER TERRAIN...JUXTAPOSED
WITH STG SFC DIABATIC HEATING....SHOULD SUPPORT DEVELOPMENT OF
ISOLATED TO WIDELY SCATTERED TSTMS THIS AFTERNOON. WEAK NEAR-SFC
WINDS WILL LIMIT LOW-LEVEL HODOGRAPH SIZE AND BULK SHEAR.
HOWEVER...ERN CO WILL BE IN SRN FRINGES OF FAVORABLE WINDS
ALOFT...WITH 30-40 KT EFFECTIVE SHEAR MAGNITUDES POSSIBLE. AS
SUCH...ORGANIZED MULTICELLULAR TO MRGL SUPERCELLULAR TSTM MODES ARE
PSBL...WITH RISK OF HAIL. WELL-MIXED SUBCLOUD LAYER ALSO MAY
ENHANCE LOCALIZED POTENTIAL FOR STG-DAMAGING GUSTS.

...CENTRAL APPALACHIANS/PIEDMONT...
WIDELY SCATTERED TO SCATTERED TSTMS SHOULD DEVELOP THIS
AFTERNOON...MOVING GENERALLY SWD-SSWWD WITH POTENTIAL FOR ISOLATED
DAMAGING GUSTS AND HAIL NEAR SVR LIMITS. CONVECTION THEN SHOULD
WEAKEN AFTER DARK AS NEAR-SFC LAYER DIABATICALLY STABILIZES. SFC
DEW POINTS MID 60S TO LOW 70S F WILL CONTRIBUTE TO MLCAPE 1500-2500
J/KG MID-LATE AFTERNOON. ORGANIZATION OF SVR POTENTIAL WILL BE
LIMITED BY LACK OF MORE ROBUST DEEP-LAYER WIND FIELDS...ALTHOUGH STG
DIRECTIONAL SHEAR WILL OCCUR BENEATH MID-UPPER LEVEL NLYS.

...LA COAST...
PERIPHERAL AND CYCLONICALLY CURVING LLJ IS EXPECTED E-N OF CENTER OF
T.D. 13...AS LATTER DRIFTS NWWD TO NWD ACROSS NRN GULF PER NHC FCST.
THIS LLJ...ALREADY BEING SAMPLED BY LIX VWP...WILL CONTRIBUTE TO
ENLARGING HODOGRAPHS AND MRGL/CONDITIONAL TORNADO POTENTIAL
GENERALLY FROM CENTRAL LA COAST AND LOWER ATCHAFALAYA BASIN EWD TO
IMMEDIATE MS COAST. LOCALIZED CONVECTIVE MODE -- NAMELY DEVELOPMENT
OF SUSTAINED MINI-SUPERCELLS WITHIN ELONGATED PRECIP PLUME--WILL BE
KEY FACTOR IN ANY TORNADO THREAT. OTHER LIMITING FACTORS INCLUDE
EXTENSIVE COVERAGE OF CLOUDS/PRECIP ACTING TO RESTRICT AREAS OF
FAVORABLE DIABATIC DESTABILIZATION NEAR COAST. LOW-LEVEL
WINDS/SHEAR WILL WEAKEN WITH SUBSTANTIAL EXTENT INLAND. TORNADO
THREAT IS TOO ISOLATED/CONDITIONAL FOR CATEGORICAL OUTLOOK
ATTM...BUT MAY NEED UPGRADE IF CYCLONE WIND FIELDS SUBSTANTIALLY
STRENGTHEN IN MOST FAVORABLE LOW-LEVEL SHEAR SECTOR.

..EDWARDS/HURLBUT.. 09/02/2011

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