KDVN [130238]: Preliminary Local Storm Report

NWUS53 KDVN 130238
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
837 PM CST SAT DEC 12 2009

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

0837 PM FREEZING RAIN 1 SSE CEDAR RAPIDS 41.95N 91.66W
12/12/2009 U0.00 INCH LINN IA TRAINED SPOTTER

LIGHT GLAZE FROM FREEZING DRIZZLE ON PAVEMENT. SLICK
CONDITIONS.

&&

$$

ERVIN

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KMKX [130237]: Preliminary Local Storm Report

NWUS53 KMKX 130237
LSRMKX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
836 PM CST SAT DEC 12 2009

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

0830 PM FREEZING RAIN 5 SW MADISON 43.03N 89.45W
12/12/2009 E0.01 INCH DANE WI TRAINED SPOTTER

LIGHT GLAZE OF ICE ON SNOWBOARD...DRIVEWAY SLICK IN A FEW
SPOTS. TEMPERATURE OF 31 DEGREES.

&&

$$

FRANKS

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KMOB [130232]: Preliminary Local Storm Report

NWUS54 KMOB 130232
LSRMOB

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOBILE AL
832 PM CST SAT DEC 12 2009

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

0445 PM FLOOD WEST BEND 31.82N 88.13W
12/12/2009 CLARKE AL EMERGENCY MNGR

TROTTERS ROAD FLOODED NEAR WEST BEND.

0445 PM FLASH FLOOD 6 NW JACKSON 31.57N 87.97W
12/12/2009 CLARKE AL EMERGENCY MNGR

WATER COVERING BETHLEHEM ROAD BETWEEN HWY 69 AND WINN
ROAD NEAR MAYS CROSSROADS.

0445 PM FLOOD 1 S JACKSON 31.49N 87.89W
12/12/2009 CLARKE AL EMERGENCY MNGR

HEAVY RAIN CAUSED MUDSLIDE NEAR COUNTY ROAD 15 WHICH WAS
UNDERMINING THE ROADWAY.

0530 PM FLOOD LEROY 31.51N 87.98W
12/12/2009 WASHINGTON AL PUBLIC

ST MARTIN ROAD FLOODED IN LEROY.

0655 PM FLASH FLOOD GAINESTOWN 31.45N 87.69W
12/12/2009 CLARKE AL EMERGENCY MNGR

WATER COVERING GAINESTOWN ROAD AT CHESTANG HILL.

0655 PM FLASH FLOOD 5 NE JACKSON 31.56N 87.83W
12/12/2009 CLARKE AL EMERGENCY MNGR

OVER 2 FEET OF WATER COVERING A PORTION OF CAMP MAUBILA
ROAD IN ANTIOCH.

0655 PM FLASH FLOOD 10 NE JACKSON 31.61N 87.77W
12/12/2009 CLARKE AL EMERGENCY MNGR

WATER COVERS ALLEN WALKER ROAD NEAR ALLEN ROAD.

&&

$$

CACERES

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KLOX [130228]: Preliminary Local Storm Report

NWUS56 KLOX 130228
LSRLOX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OXNARD CA
628 PM PST SAT DEC 12 2009

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

0330 PM FLASH FLOOD 4 N ALTADENA 34.25N 118.14W
12/12/2009 LOS ANGELES CA LAW ENFORCEMENT

MUD AND DEBRIS FLOW REPORTED ON ANGELES CREST HIGHWAY
FROM MILE MARKER 27 TO 42. APPROXIMATELY 60 VEHICLES
STUCK IN ONE LOCATION...WITH AN ADDITIONAL 30 VEHICLES
REPORTED STUCK IN A SECOND LOCATION. NO INJURIES REPORTED
OR HOMES DAMAGED.

0500 PM NON-TSTM WND GST 13 SW LANCASTER 34.56N 118.34W
12/12/2009 M68.00 MPH LOS ANGELES CA MESONET

SUSTAINED WINDS OF 41 MPH WITH GUSTS TO 68 MPH OUT OF THE
SOUTH AT GRASS MOUNTAIN RAWS...ELEVATION 4625 FEET.

&&

$$

MEIER

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KDVN [130225]: Preliminary Local Storm Report

NWUS53 KDVN 130225
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
825 PM CST SAT DEC 12 2009

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

0818 PM FREEZING RAIN WNW BELLE PLAINE 41.90N 92.28W
12/12/2009 U0.00 INCH BENTON IA TRAINED SPOTTER

LIGHT FREEZING DRIZZLE.

&&

$$

WE

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KSGF [130211]: Preliminary Local Storm Report

NWUS53 KSGF 130211
LSRSGF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
811 PM CST SAT DEC 12 2009

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

0803 PM HAIL BUFFALO 37.64N 93.09W
12/12/2009 E0.75 INCH DALLAS MO LAW ENFORCEMENT

&&

$$

HATCH

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KLOT [130209]: Preliminary Local Storm Report

NWUS53 KLOT 130209
LSRLOT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
808 PM CST SAT DEC 12 2009

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

0800 PM FREEZING RAIN SYCAMORE 41.98N 88.70W
12/12/2009 U0.00 INCH DE KALB IL TRAINED SPOTTER

STREETS AND SIDEWALKS BECOMING GLAZED OVER.

&&

$$

RODRIGUEZ

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KLSX [130207]: Preliminary Local Storm Report

NWUS53 KLSX 130207
LSRLSX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
807 PM CST SAT DEC 12 2009

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

0805 PM HAIL 1 N MAPAVILLE 38.26N 90.49W
12/12/2009 E0.25 INCH JEFFERSON MO TRAINED SPOTTER

LASTED A FEW MINUTES.

&&

EVENT NUMBER LSX0900412

$$

SIPPRELL

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KDVN [130144]: Preliminary Local Storm Report

NWUS53 KDVN 130144
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
744 PM CST SAT DEC 12 2009

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

0743 PM FREEZING RAIN DAVENPORT MUNICIPAL AIR 41.62N 90.58W
12/12/2009 U0.00 INCH SCOTT IA NWS EMPLOYEE

FREEZING DRIZZLE CREATING SLICK PAVEMENT AND SIDEWALK.

&&

$$

ERVIN

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KILX [130141]: Preliminary Local Storm Report

NWUS53 KILX 130141
LSRILX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
741 PM CST SAT DEC 12 2009

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

0730 PM FREEZING RAIN 3 NE BLOOMINGTON 40.51N 88.93W
12/12/2009 U0.00 INCH MCLEAN IL NWS EMPLOYEE

LIGHT GLAZE ON DRIVEWAY...SIDEWALK...AND ELEVATED
SURFACES. MAIN ROADS OK.

&&

$$

25

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KDVN [130137]: Preliminary Local Storm Report

NWUS53 KDVN 130137
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
737 PM CST SAT DEC 12 2009

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

0734 PM FREEZING RAIN ANAMOSA 42.11N 91.28W
12/12/2009 U0.00 INCH JONES IA CO-OP OBSERVER

LIGHT GLAZE ON ROADS.

&&

$$

WE

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KILX [130132]: Preliminary Local Storm Report

NWUS53 KILX 130132
LSRILX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
732 PM CST SAT DEC 12 2009

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

0702 PM FREEZING RAIN 1 N ABINGDON 40.82N 90.40W
12/12/2009 E0.10 INCH KNOX IL MESONET

GLAZE OF ICE COATING OUTDOOR SURFACES. ESTIMATED TENTH
INCH IN PAST THREE HOURS. SWOP REPORT.

&&

$$

25

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KLOT [130122]: Preliminary Local Storm Report

NWUS53 KLOT 130122
LSRLOT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
722 PM CST SAT DEC 12 2009

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

0716 PM FREEZING RAIN 1 W MAPLE PARK 41.91N 88.61W
12/12/2009 E0.00 INCH DEKALB IL TRAINED SPOTTER

RAIN FREEZING ON CAR.

0715 PM FREEZING RAIN MAPLE PARK 41.91N 88.59W
12/12/2009 E0.00 INCH KANE IL TRAINED SPOTTER

RAIN FREEZING ON CAR WHILE DRIVING WEST FROM MAPLE PARK.

&&

$$

RATZER

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KGJT [130120]: Preliminary Local Storm Report

NWUS55 KGJT 130120
LSRGJT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
619 PM MST SAT DEC 12 2009

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

0304 PM HEAVY SNOW 3 SSE RICO 37.65N 108.02W
12/12/2009 M7.0 INCH DOLORES CO OTHER FEDERAL

24 HOUR SNOWFALL AMOUNT ENDING SAT MORNING FROM SCOTCH
CREEK. SWE OF 0.5

&&

EVENT NUMBER GJT0900182

$$

MALEKSA

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KGJT [130118]: Preliminary Local Storm Report

NWUS55 KGJT 130118
LSRGJT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
618 PM MST SAT DEC 12 2009

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

0304 PM HEAVY SNOW 2 WNW TROUT LAKE 37.81N 107.91W
12/12/2009 M10.0 INCH SAN MIGUEL CO OTHER FEDERAL

24 HOUR SNOWFALL AMOUNT ENDING SAT MORNING FROM LIZARD
HEAD PASS. SWE OF 0.6

&&

EVENT NUMBER GJT0900181

$$

MALEKSA

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KLIX [130106]: Preliminary Local Storm Report

NWUS54 KLIX 130106
LSRLIX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
706 PM CST SAT DEC 12 2009

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

0601 PM FLASH FLOOD BOUTTE 29.90N 90.40W
12/12/2009 ST. CHARLES LA EMERGENCY MNGR

FLOODING OF ONE HOME ON EAST BANK AND FOUR HOMES ON WEST
BANK OF PARISH.

0700 PM FLASH FLOOD METAIRIE 30.00N 90.18W
12/12/2009 JEFFERSON LA EMERGENCY MNGR

DOZENS OF HOMES ON EAST BANK HAVE FLOODED.

&&

$$

TDESTRI

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KLSX [130102]: Preliminary Local Storm Report

NWUS53 KLSX 130102
LSRLSX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
702 PM CST SAT DEC 12 2009

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

0655 PM HAIL 5 SE WASHINGTON 38.50N 90.95W
12/12/2009 E0.25 INCH FRANKLIN MO TRAINED SPOTTER

&&

EVENT NUMBER LSX0900411

$$

SIPPRELL

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 130100
SWODY1
SPC AC 130059

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0659 PM CST SAT DEC 12 2009

VALID 130100Z - 131200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
BROAD BELT OF NEARLY ZONAL FLOW PREVAILS ACROSS MOST OF CONUS FROM
SWRN DESERTS TO ATLANTIC COAST...PERTURBED MOST STRONGLY BY
SHORTWAVE TROUGH NOW LOCATED JUST OFFSHORE NRN/CENTRAL CA COAST.
THIS TROUGH WILL MOVE INLAND OVERNIGHT TO NWRN NV AND S-CENTRAL CA.
FARTHER DOWNSTREAM...MOISTURE CHANNEL IMAGERY INDICATES SUBTLE
TROUGH MOVING NEWD ACROSS PORTIONS KS/OK...FCST TO REACH MID MS
VALLEY REGION BY 12Z.

AT SFC...HIGH LEFT BEHIND PRIOR FROPA -- INITIALLY INVOF COASTAL
DELMARVA REGION -- IS FCST TO CONTINUE RETREATING NEWD AND OFFSHORE.
AS THIS OCCURS...MARINE AIR MASS WILL APCH LA/AL/MS GULF COASTS IN
ADVANCE OF WEAK FRONTAL-WAVE LOW NOW ANALYZED JUST OFFSHORE BPT
AREA. WARM FRONT IS ANALYZED TO ITS E...JUST OFFSHORE LA
COAST...THEN SPLITTING INTO DOUBLE-STRUCTURED FRONTAL ZONE -- ONE
BRANCH EWD ACROSS N-CENTRAL FL AND ANOTHER SEWD OVER E-CENTRAL GULF.
SRN BRANCH REPRESENTS MORE PURE MARITIME/TROPICAL AIR MASS...WHILE
NRN BRANCH MARKS SRN PERIPHERY OF RESIDUAL/STABLE POLAR AIR MASS
ASSOCIATED WITH ANTICYCLONE.

REGIMES OF LOW LEVEL WAA AND MOISTURE TRANSPORT...SUPPORTING
CLUSTERS OF CONVECTION FROM LOWER MS DELTA TO SRN MO -- ARE EXPECTED
TO SHIFT ENEWD THROUGH REMAINDER PERIOD. THIS WILL LEAD TO
INCREASING THETAE ABOVE RELATIVELY COOL/STABLE BOUNDARY LAYER...AND
BUOYANCY FAVORABLE FOR TSTMS DEVELOPING OVER LOWER OH
VALLEY...PORTIONS TN VALLEY REGION AND CORRIDOR FROM SRN MS/AL TO
COASTAL SC.

...LOWER DELTA REGION TO MS/AL COASTS...
SRN BRANCH OF WARM FRONT WILL MERGE FROM W-E WITH NRN BRANCH OVER
NRN GULF AND NEAR MOUTH OF MS RIVER...BRINGING NEARLY SFC-BASED
LIFTED PARCELS ACROSS COASTAL MARSHES OF EXTREME SERN LA. THIS AIR
MASS MAY REACH COASTAL MS/AL/WRN FL PANHANDLE...BUT PROBABLY NOT
VERY FAR INLAND...IF AT ALL...BEFORE END OF PERIOD. SOME CONVECTION
MAY PRODUCE STG GUSTS...WITH MLCAPE 500-1000 J/KG BEING POSSIBLE
ALONG AND S OF WARM FRONT. ANOMALOUSLY LARGE MUCAPE IN LIX RAOB
APPEARS TO BE RELATED TO SPURIOUS LAYER OF AUTOCONVECTIVE LAPSE
RATES WITHIN SATURATED AIR...ATOP FRONTAL LAYER.

...MID-SOUTH TO OZARKS AND LOWER OH VALLEY REGION...
00Z SGF SOUNDING SAMPLED REGION OF LARGE-SCALE ASCENT ASSOCIATED
WITH TROUGH EJECTING FROM S-CENTRAL PLAINS...WITH ELEVATED MUCAPE TO
NEAR 1000 J/KG...BUT ONLY 15 KT EFFECTIVE SHEAR MAGNITUDE. BUOYANCY
SHOULD LESSEN WITH TIME AND NEW EXTENT AS PARENT SYSTEM
AMPLIFIES...BUT STILL SUPPORTING POTENTIAL FOR TSTMS TONIGHT FROM
OZARKS TO SRN INDIANA. VERY BRIEF/ISOLATED HAIL NEAR SVR LIMITS
CANNOT BE RULED OUT FROM MOST INTENSE CORES....HOWEVER THIS THREAT
APPEARS TOO CONDITIONAL AND WIDELY DISPERSED FOR SVR PROBABILITIES.

...CA...
ALTHOUGH POTENTIAL SHOULD DIMINISH AS MID-UPPER TROUGH MOVES INLAND
AND DIABATIC SFC COOLING OCCURS...ISOLATED TO WIDELY SCATTERED
THUNDER STILL IS POSSIBLE IN REGION OF RELATED MID-UPPER LEVEL
DESTABILIZATION/ASCENT. FCST SOUNDINGS AND MODIFIED OAK RAOB
INDICATES MUCAPE 200-400 J/KG WILL REMAIN POSSIBLE FOR A FEW MORE
HOURS AHEAD OF TROUGH.

..EDWARDS.. 12/13/2009

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KDVN [130100]: Preliminary Local Storm Report

NWUS53 KDVN 130100
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
700 PM CST SAT DEC 12 2009

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

0658 PM FREEZING RAIN 3 NE MACOMB 40.50N 90.64W
12/12/2009 E0.00 INCH MCDONOUGH IL TRAINED SPOTTER

ICE ON ROADS AND SLICK.

&&

$$

WE

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KLIX [130044]: Preliminary Local Storm Report

NWUS54 KLIX 130044
LSRLIX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
643 PM CST SAT DEC 12 2009

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

0615 PM FLASH FLOOD 4 ESE CHALMETTE 29.92N 89.91W
12/12/2009 ST. BERNARD LA PUBLIC

RELATIVE OF NWS EMPLOYEE REPORTED WIDESPREAD SIGNIFICANT
FLOODING ACROSS ST. BERNARD PARISH

&&

$$

98/SO

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KLSX [130044]: Preliminary Local Storm Report

NWUS53 KLSX 130044
LSRLSX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
643 PM CST SAT DEC 12 2009

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

0630 PM HAIL 3 E SULLIVAN 38.22N 91.11W
12/12/2009 E1.00 INCH FRANKLIN MO TRAINED SPOTTER

BRIEF PERIOD OF QUARTER SIZED HAIL WITH INTERMIXED
SMALLER HAIL AT MERAMEC STATE PARK.

&&

EVENT NUMBER LSX0900410

$$

SIPPRELL

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KDVN [130043]: Preliminary Local Storm Report

NWUS53 KDVN 130043
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
643 PM CST SAT DEC 12 2009

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

0641 PM FREEZING RAIN 1 SSE CEDAR RAPIDS 41.95N 91.66W
12/12/2009 U0.00 INCH LINN IA TRAINED SPOTTER

FREEZING DRIZZLE ACCUMULATING ON ROADS, ROADS ARE GETTING
SLICK.

&&

$$

WE

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KLIX [130029]: Preliminary Local Storm Report

NWUS54 KLIX 130029
LSRLIX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
629 PM CST SAT DEC 12 2009

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

0620 PM FLASH FLOOD BELLE CHASSE 29.85N 90.00W
12/12/2009 PLAQUEMINES LA LAW ENFORCEMENT

SIGNIFICANT STREET FLOODING IN NORTHERN PLAQUEMINES
PARISH.

&&

$$

FREVITTE

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KPQR [130029]: Preliminary Local Storm Report...corrected

NWUS56 KPQR 130029
LSRPQR

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE PORTLAND OR
428 PM PST SAT DEC 12 2009

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

0530 PM FREEZING RAIN 5 E LEBANON 44.53N 122.80W
12/11/2009 U0.00 INCH LINN OR TRAINED SPOTTER

0530 PM FREEZING RAIN 3 NE BLUE RIVER 44.18N 122.29W
12/11/2009 U0.00 INCH LANE OR BROADCAST MEDIA

FREEZING RAIN AT HARBICKI COUNTRY STORE.

0830 PM FREEZING RAIN 5 NW EUGENE 44.10N 123.18W
12/11/2009 U0.00 INCH LANE OR BROADCAST MEDIA

3 CAR ACCIDENTS ALONG RIVER BEND ROAD DUE TO FREEZING
RAIN AND ICE ON GROUND.

0925 PM SLEET SALEM 44.92N 123.02W
12/11/2009 U0.00 INCH MARION OR TRAINED SPOTTER

SLEET AT KUEBLER ROAD EXIT IN SALEM

0940 PM ICE STORM EUGENE 44.05N 123.11W
12/11/2009 LANE OR BROADCAST MEDIA

1/8 TO 1/4 INCH OF ICE ON ROADS. A LOT OF ACCIDENTS.

1000 PM FREEZING RAIN MONMOUTH 44.85N 123.23W
12/11/2009 U0.00 INCH POLK OR TRAINED SPOTTER

FREEZING RAIN GLAZED VEHCILES

1000 PM FREEZING RAIN COTTAGE GROVE 43.80N 123.06W
12/11/2009 U0.00 INCH LANE OR BROADCAST MEDIA

CAR ACCIDENTS ALONG HIGHWAY 99 DUE TO FREEZING RAIN AND
ICE ON THE GROUND.

1025 PM FREEZING RAIN EUGENE 44.05N 123.11W
12/11/2009 M1.00 INCH LANE OR BROADCAST MEDIA

FREEZING RAIN CAUSED SEVERAL ACCIDENTS ON ALL MAJOR
HIGHWAYS AND ROADS.

1055 PM FREEZING RAIN W PHILOMATH 44.54N 123.36W
12/11/2009 U0.00 INCH BENTON OR BROADCAST MEDIA

HIGHWAY 34 CLOSED TO TRAFFIC DUE TO AN ESTIMATED 30
VEHICLES HAVING TROUBLE WITH TRACTION AND STRANDED DUE TO
FREEZING RAIN.

0622 AM FREEZING RAIN 1 SSW SODAVILLE 44.47N 122.88W
12/12/2009 E0.12 INCH LINN OR TRAINED SPOTTER

BLACK ICE ON ROADS WITH 5 WRECKS IN 3 MILES LAST NIGHT
AND MANY CARS IN THE DITCH.

0819 AM FREEZING RAIN 10 W EUGENE 44.05N 123.31W
12/12/2009 U0.00 INCH LANE OR TRAINED SPOTTER

FREEZING RAIN BEGAN LATE AFTERNOON YESTERDAY. THIS
MORNING SURFACES ARE ICE COVERED.

0825 AM FREEZING RAIN 5 WSW MONMOUTH 44.83N 123.33W
12/12/2009 U0.00 INCH POLK OR TRAINED SPOTTER

1011 AM FREEZING RAIN 2 SSW PHILOMATH 44.52N 123.37W
12/12/2009 U0.00 INCH BENTON OR TRAINED SPOTTER

VERY LIGHT FREEZING RAIN.

1011 AM FREEZING RAIN 5 S PORTLAND AIRPORT 45.52N 122.60W
12/12/2009 U0.00 INCH MULTNOMAH OR NWS EMPLOYEE

1048 AM FREEZING RAIN 1 SSW SODAVILLE 44.47N 122.88W
12/12/2009 E0.12 INCH LINN OR TRAINED SPOTTER

1100 AM FREEZING RAIN AURORA 45.23N 122.76W
12/12/2009 E0.03 INCH MARION OR ASOS

1200 PM SLEET SALEM 44.92N 123.02W
12/12/2009 U0.00 INCH MARION OR ASOS

1200 PM SLEET MCMINNVILLE 45.21N 123.19W
12/12/2009 U0.00 INCH YAMHILL OR ASOS

0250 PM FREEZING RAIN 1 W SKAMANIA 45.62N 122.08W
12/12/2009 U0.00 INCH SKAMANIA WA TRAINED SPOTTER

FREEZING DRIZZLE.

0250 PM FREEZING RAIN TROUTDALE 45.54N 122.39W
12/12/2009 E0.00 INCH MULTNOMAH OR DEPT OF HIGHWAYS

I-84 CLOSED FROM TROUTDALE TO HOOD RIVER DUE TO FREEZING
RAIN AND ICY ROADS

&&

$$

TW

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KBOI [130007]: Preliminary Local Storm Report

NWUS55 KBOI 130007
LSRBOI

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOISE ID
507 PM MST SAT DEC 12 2009

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

0300 PM SNOW 2 N PINE 43.50N 115.32W
12/12/2009 M3.5 INCH ELMORE ID TRAINED SPOTTER

LAST 24 HOURS.

0457 PM SNOW 2 SE BOISE 43.59N 116.20W
12/12/2009 M0.9 INCH ADA ID OFFICIAL NWS OBS

BOISE AIRPORT REPORTED 0.9 INCHES OF NEW SNOW LAST 6
HOURS. TOTAL ACCUMULATED SNOW SINCE MIDNIGHT IS 1.3
INCHES.

&&

$$

JSMITH

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KLIX [130003]: Preliminary Local Storm Report

NWUS54 KLIX 130003
LSRLIX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
602 PM CST SAT DEC 12 2009

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

0445 PM FLASH FLOOD NEW ORLEANS 29.97N 90.08W
12/12/2009 ORLEANS LA NEWSPAPER

MEDIA REPORTS HOMES FLOODED IN THE FOUNTAINBLEU
NEIGHBOORHOOD OF ORLEANS PARISH. WIDESPREAD STREET
FLOODING CONTINUES ACROSS THE PARISH.

&&

$$

98/SO

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KRIW [122342]: Preliminary Local Storm Report

NWUS55 KRIW 122342
LSRRIW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
0401 PM MDT SAT DEC 12 2009

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

0336 PM SNOW ALTA 1NNW 43.77N 111.03W
12/12/2009 M0.50 INCHES TETON WY CO-OP OBSERVER

0339 PM HEAVY SNOW BONDURANT 43.20N 110.47W
12/12/2009 M12.00 INCHES SUBLETTE WY TRAINED SPOTTER

0345 PM SNOW JACKSON 9.9 NNW 43.60N 110.85W
12/12/2009 M5.00 INCHES TETON WY PARK/FOREST SRVC

JACKSON HOLE-RAYMER

0345 PM SNOW JACKSON 43.60N 110.75W
12/12/2009 M3.00 INCHES TETON WY CWOP

0346 PM SNOW COKEVILLE 42.08N 110.95W
12/12/2009 M2.00 INCHES LINCOLN WY TRAINED SPOTTER

0347 PM SNOW PINEDALE 1NE 42.88N 109.84W
12/12/2009 M2.00 INCHES SUBLETTE WY TRAINED SPOTTER

0347 PM SNOW STAR VALLEY RANCH 42.98N 110.95W
12/12/2009 M4.50 INCHES LINCOLN WY TRAINED SPOTTER

0347 PM SNOW ALPINE 43.18N 111.03W
12/12/2009 M4.00 INCHES LINCOLN WY TRAINED SPOTTER

0348 PM SNOW AFTON 1.5NW 42.73N 110.95W
12/12/2009 M1.00 INCHES LINCOLN WY TRAINED SPOTTER

0351 PM SNOW CANYON 1 WSW 44.72N 110.51W
12/12/2009 E2.00 INCHES PARK WY MESONET

CANYON SNOTEL

0351 PM SNOW OLD FAITHFUL 14 ESE 44.37N 110.58W
12/12/2009 E3.00 INCHES TETON WY MESONET

THUMB DIVIDE SNOTEL

0351 PM SNOW MORAN JUNCTION 25 NE 44.15N 110.22W
12/12/2009 E3.00 INCHES TETON WY MESONET

TWO OCEAN PLATEAU SNOTEL

0351 PM SNOW CLARK 21 W 44.94N 109.57W
12/12/2009 E3.00 INCHES PARK WY MESONET

BEARTOOTH LAKE SNOTEL

0351 PM SNOW WAPITI 19 WSW 44.38N 109.79W
12/12/2009 E3.00 INCHES PARK WY MESONET

BLACKWATER SNOTEL

0352 PM SNOW PAHASKA 14 NE 44.65N 109.78W
12/12/2009 E5.00 INCHES PARK WY MESONET

EVENING STAR SNOTEL

0352 PM SNOW PAHASKA 16 N 44.73N 109.91W
12/12/2009 E1.50 INCHES PARK WY MESONET

PARKER PEAK SNOTEL

0352 PM SNOW CODY 56 SW 43.93N 109.82W
12/12/2009 E3.00 INCHES PARK WY MESONET

YOUNTS PEAK SNOTEL

0352 PM SNOW THAYNE 17.2 E 42.97N 110.61W
12/12/2009 M3.00 INCHES LINCOLN WY BTAVAL

BLIND BULL SUMMIT

0353 PM SNOW AFTON 8 SE 42.65N 110.81W
12/12/2009 E3.00 INCHES LINCOLN WY MESONET

COTTONWOOD CREEK SNOTEL

0353 PM SNOW KEMMERER 26 N 42.15N 110.68W
12/12/2009 E3.00 INCHES LINCOLN WY MESONET

HAMS FORK SNOTEL

0353 PM HEAVY SNOW KEMMERER 36 N 42.30N 110.68W
12/12/2009 E6.00 INCHES LINCOLN WY MESONET

INDIAN CREEK SNOTEL

0354 PM SNOW AFTON 19 SE 42.53N 110.66W
12/12/2009 E3.00 INCHES LINCOLN WY MESONET

SPRING CREEK DIVIDE SNOTEL

0354 PM SNOW AFTON 8 NE 42.82N 110.84W
12/12/2009 E3.00 INCHES LINCOLN WY MESONET

WILLOW CREEK SNOTEL

0354 PM SNOW BIG PINEY 21 W 42.49N 110.53W
12/12/2009 E3.00 INCHES SUBLETTE WY MESONET

SNIDER BASIN SNOTEL

0354 PM SNOW BONDURANT 12 ESE 43.13N 110.20W
12/12/2009 E3.00 INCHES SUBLETTE WY MESONET

EAST RIM DIVIDE SNOTEL

0355 PM HEAVY SNOW BONDURANT 10 N 43.34N 110.43W
12/12/2009 E6.00 INCHES TETON WY MESONET

GRANITE CREEK SNOTEL

0355 PM SNOW SOUTH ENTRANCE 8 W 44.13N 110.83W
12/12/2009 E3.00 INCHES TETON WY MESONET

GRASSY LAKE SNOTEL

0355 PM HEAVY SNOW ALTA 6 ENE 43.78N 110.93W
12/12/2009 E6.00 INCHES TETON WY MESONET

GRAND TARGHEE SNOTEL

0355 PM SNOW BONDURANT 20 NE 43.39N 110.13W
12/12/2009 E4.00 INCHES TETON WY MESONET

GROS VENTRE SUMMIT SNOTEL

0356 PM SNOW DUBOIS 25 NW 43.75N 110.06W
12/12/2009 E5.00 INCHES TETON WY MESONET

TOGWOTEE PASS SNOTEL

0356 PM SNOW SNAKE RIVER STN SNOTEL 44.13N 110.67W
12/12/2009 E5.00 INCHES TETON WY MESONET

SNAKE RIVER STN SNOTEL

0356 PM SNOW BOULDER 24 ESE 42.65N 109.26W
12/12/2009 E3.00 INCHES SUBLETTE WY MESONET

BIG SANDY OPENING SNOTEL

0357 PM SNOW PINEDALE 12 NNE 43.01N 109.76W
12/12/2009 E3.00 INCHES SUBLETTE WY MESONET

ELKHART PARK G.S. SNOTEL

0357 PM SNOW BONDURANT 14 E 43.17N 110.14W
12/12/2009 E5.00 INCHES SUBLETTE WY MESONET

LOOMIS PARK SNOTEL

0357 PM SNOW CORA 12 N 43.11N 109.95W
12/12/2009 E5.00 INCHES SUBLETTE WY MESONET

NEW FORK LAKE SNOTEL

0401 PM SNOW THAYNE 1SE 42.90N 110.98W
12/12/2009 M3.50 INCHES LINCOLN WY PUBLIC

&&

$$

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KPQR [122339]: Preliminary Local Storm Report...corrected

NWUS56 KPQR 122339
LSRPQR

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE PORTLAND OR
339 PM PST SAT DEC 12 2009

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

0500 PM FREEZING RAIN ALSEA 44.40N 123.57W
12/11/2009 E0.00 INCH BENTON OR BROADCAST MEDIA

UTILITY TRUCK SLID OFF HIGHWAY 34 INTO RIVER DUE TO
FREEZING RAIN

0530 PM FREEZING RAIN 3 NE BLUE RIVER 44.18N 122.29W
12/11/2009 U0.00 INCH LANE OR BROADCAST MEDIA

FREEZING RAIN AT HARBICKI COUNTRY STORE.

0830 PM FREEZING RAIN 5 NW EUGENE 44.10N 123.18W
12/11/2009 U0.00 INCH LANE OR BROADCAST MEDIA

3 CAR ACCIDENTS ALONG RIVER BEND ROAD DUE TO FREEZING
RAIN AND ICE ON GROUND.

0940 PM ICE STORM EUGENE 44.05N 123.11W
12/11/2009 LANE OR BROADCAST MEDIA

1/8 TO 1/4 INCH OF ICE ON ROADS. A LOT OF ACCIDENTS.

1000 PM FREEZING RAIN COTTAGE GROVE 43.80N 123.06W
12/11/2009 U0.00 INCH LANE OR BROADCAST MEDIA

CAR ACCIDENTS ALONG HIGHWAY 99 DUE TO FREEZING RAIN AND
ICE ON THE GROUND.

1055 PM FREEZING RAIN W PHILOMATH 44.54N 123.36W
12/11/2009 U0.00 INCH BENTON OR BROADCAST MEDIA

HIGHWAY 34 CLOSED TO TRAFFIC DUE TO AN ESTIMATED 30
VEHICLES HAVING TROUBLE WITH TRACTION AND STRANDED DUE TO
FREEZING RAIN.

0622 AM FREEZING RAIN 1 SSW SODAVILLE 44.47N 122.88W
12/12/2009 E0.12 INCH LINN OR TRAINED SPOTTER

BLACK ICE ON ROADS WITH 5 WRECKS IN 3 MILES LAST NIGHT
AND MANY CARS IN THE DITCH.

0819 AM FREEZING RAIN 10 W EUGENE 44.05N 123.31W
12/12/2009 U0.00 INCH LANE OR TRAINED SPOTTER

FREEZING RAIN BEGAN LATE AFTERNOON YESTERDAY. THIS
MORNING SURFACES ARE ICE COVERED.

0825 AM FREEZING RAIN 5 WSW MONMOUTH 44.83N 123.33W
12/12/2009 U0.00 INCH POLK OR TRAINED SPOTTER

1011 AM FREEZING RAIN NE PORTLAND AIRPORT 45.59N 122.60W
12/12/2009 U0.00 INCH MULTNOMAH OR NWS EMPLOYEE

1011 AM FREEZING RAIN 2 SSW PHILOMATH 44.52N 123.37W
12/12/2009 U0.00 INCH BENTON OR TRAINED SPOTTER

VERY LIGHT FREEZING RAIN.

1048 AM FREEZING RAIN 1 SSW SODAVILLE 44.47N 122.88W
12/12/2009 E0.12 INCH LINN OR TRAINED SPOTTER

1100 AM FREEZING RAIN AURORA 45.23N 122.76W
12/12/2009 E0.03 INCH MARION OR ASOS

1200 PM SLEET SALEM 44.92N 123.02W
12/12/2009 U0.00 INCH MARION OR ASOS

1200 PM SLEET MCMINNVILLE 45.21N 123.19W
12/12/2009 U0.00 INCH YAMHILL OR ASOS

0250 PM FREEZING RAIN 1 W SKAMANIA 45.62N 122.08W
12/12/2009 U0.00 INCH SKAMANIA WA TRAINED SPOTTER

FREEZING DRIZZLE.

0250 PM FREEZING RAIN TROUTDALE 45.54N 122.39W
12/12/2009 E0.00 INCH MULTNOMAH OR DEPT OF HIGHWAYS

I-84 CLOSED FROM TROUTDALE TO HOOD RIVER DUE TO FREEZING
RAIN AND ICY ROADS

&&

$$

LRAMIREZ

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KLOT [122327]: Preliminary Local Storm Report

NWUS53 KLOT 122327
LSRLOT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
527 PM CST SAT DEC 12 2009

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

0523 PM SLEET 4 NNW COAL CITY 41.34N 88.31W
12/12/2009 E0.00 INCH GRUNDY IL NWS EMPLOYEE

MIX OF LIGHT SNOW AND LIGHT SLEET FALLING.

&&

$$

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KLIX [122254]: Preliminary Local Storm Report

NWUS54 KLIX 122254
LSRLIX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
454 PM CST SAT DEC 12 2009

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

0448 PM FLASH FLOOD NEW ORLEANS 29.97N 90.08W
12/12/2009 ORLEANS LA PUBLIC

SERIOUS STREET FLOODING AT ON-RAMPS AND OFF-RAMPS OF
ELYSION FIELDS AND INTERSTATE 610. CARS STALLING OUT IN
AT LEAST TWO FEET OF WATER.

0450 PM FLASH FLOOD METAIRIE 30.00N 90.18W
12/12/2009 JEFFERSON LA EMERGENCY MNGR

SERIOUS STREET FLOODING...POSSIBLY STARTING TO THREATEN
HOMES.

&&

$$

TDESTRI

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KDVN [122237]: Preliminary Local Storm Report

NWUS53 KDVN 122237
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
436 PM CST SAT DEC 12 2009

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

0430 PM FREEZING RAIN MACOMB 40.47N 90.68W
12/12/2009 M0.00 INCH MCDONOUGH IL TRAINED SPOTTER

LIGHT COATING OF FREEZING RAIN ON ELEVATED SURFACES.

&&

$$

ERVIN

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KGJT [122134]: Preliminary Local Storm Report

NWUS55 KGJT 122134
LSRGJT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
234 PM MST SAT DEC 12 2009

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

1241 PM HEAVY SNOW COAL BANK PASS 37.70N 107.78W
12/12/2009 M10.5 INCH SAN JUAN CO OTHER FEDERAL

24 HOUR SNOWFALL AMOUNT. SWE OF 0.50 INCHES

&&

EVENT NUMBER GJT0900180

$$

MALEKSA

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KGJT [122133]: Preliminary Local Storm Report

NWUS55 KGJT 122133
LSRGJT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
233 PM MST SAT DEC 12 2009

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

1241 PM HEAVY SNOW MOLAS PASS 37.73N 107.70W
12/12/2009 M7.5 INCH SAN JUAN CO OTHER FEDERAL

24 HOUR SNOWFALL AMOUNT. SWE OF .30 INCHES

&&

EVENT NUMBER GJT0900179

$$

MALEKSA

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KSGF [122056]: Preliminary Local Storm Report

NWUS53 KSGF 122056
LSRSGF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
255 PM CST SAT DEC 12 2009

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

0254 PM HAIL 3 NNW SHELL KNOB 36.67N 93.66W
12/12/2009 E1.00 INCH BARRY MO PUBLIC

&&

$$

HATCH

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KCYS [122030]: Preliminary Local Storm Report

NWUS55 KCYS 122030
LSRCYS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
130 PM MST SAT DEC 12 2009

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

0122 PM NON-TSTM WND GST 10 SE WHEATLAND 41.95N 104.82W
12/12/2009 M75 MPH PLATTE WY DEPT OF HIGHWAYS

PEAK GUST SO FAR AT THE INTERSTATE 25 BORDEAUX EXIT WAS
75 MPH. OTHER GUSTS HAVE BEEN BETWEEN 60 AND 73 MPH SINCE
1 PM. SUSTAINED WINDS WERE BETWEEN 40 AND 45 MPH.

0110 PM NON-TSTM WND GST 20 N CHEYENNE 41.43N 104.79W
12/12/2009 M56 MPH LARAMIE WY DEPT OF HIGHWAYS

PEAK WIND GUST AT THE WITTAKER INTERSTATE 25 EXIT WAS 56
MPH AT 110 PM. SUSTAINED WINDS WERE BETWEEN 40 AND 45
MPH.

&&

$$

MWEILAND

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KMFR [122008]: Preliminary Local Storm Report

NWUS56 KMFR 122008
LSRMFR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OR
1208 PM PST SAT DEC 12 2009

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

1208 PM SNOW 11 SSE SPRAGUE RIVER 42.30N 121.41W
12/12/2009 M3.5 INCH KLAMATH OR TRAINED SPOTTER

12 HOUR PERIOD

&&

$$

SUGDEN

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 121956
SWODY1
SPC AC 121955

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0155 PM CST SAT DEC 12 2009

VALID 122000Z - 131200Z

...NO SVR TSTM AREAS FORECAST...

...SERN LA/MS/AL REGION...
ONGOING FORECAST LOOKS ON TRACK AS WEAK WARM FRONT/WARM SECTOR WILL
MOVE INLAND INTO EXTREME SERN LA THIS AFTERNOON AND FURTHER INLAND
ACROSS THE MS DELTA REGION OVERNIGHT. BAND OF ONGOING CONVECTION
FROM SOUTH OF LA INTO SRN MS APPEARS TO BE ASSOCIATED WITH
CONFLUENCE ZONE SITUATED AT 850 MB. WHILE STRONGER INSTABILITY OVER
THE GULF WATERS MAY SUPPORT AN ISOLATED STRONGER STORM OR TWO IN
SERN LA THIS AFTERNOON...THE STRONGEST LOW LEVEL CONVERGENCE IS
FORECAST TO SHIFT FROM SRN/CENTRAL MS NEWD INTO WEST CENTRAL AL
BEFORE WEAKENING. THE DISLOCATION BETWEEN THE MORE MOIST BOUNDARY
LAYER AND STRONGER LIFT...ALONG WITH POOR MID LEVEL LAPSE
RATES...SUGGEST THE SEVERE POTENTIAL IS LOW.

...CA...
AT 19Z...EXTENSIVE CLOUDS AND PCPN COVERED THE CENTRAL 2/3RDS OF THE
STATE...AHEAD OF STRONG SHORTWAVE TROUGH APPROACHING THE WEST
CENTRAL COAST. WHILE NO LIGHTNING HAS BEEN OCCURRING INLAND...
LIGHTNING STRIKES WERE NOTED WITHIN CORE COLD OF UPPER TROUGH...
ROUGHLY 200 NM WEST OF SFO. EVEN AS LAPSE RATES IMPROVE DUE TO
UVV/COLDER AIR ALOFT SPREADING INTO THE STATE...THE SEVERE THREAT
WILL BE VERY LOW DUE TO LACK OF ANY APPRECIABLE HEATING AND VERY
WEAK INSTABILITY.

..IMY.. 12/12/2009

.PREV DISCUSSION... /ISSUED 1025 AM CST SAT DEC 12 2009/

...LOWER MS RIVER VALLEY INTO THE SOUTHEAST...
SURFACE FRONT WILL CONTINUE TO LIFT SLOWLY NWD AND POSSIBLY COME
ASHORE ACROSS THE MS RIVER DELTA REGION LATE TODAY/TONIGHT AS WEAK
SURFACE LOW DEVELOPS INTO CENTRAL LA. THIS WILL OCCUR AS LOW
AMPLITUDE SHORTWAVE TROUGHS EJECTS ACROSS THE CENTRAL U.S...LEAVING
BROAD VEERING LOW LEVEL WIND FIELDS EVOLVING ACROSS THE GULF COAST
REGION. LOW LEVEL WAA REGIME WILL LIKELY MAINTAIN ELEVATED MOIST
CONVECTION AND SCATTERED THUNDERSTORM DEVELOPMENT FROM FAR ERN
TX/AR/LA ENEWD THROUGH THE PERIOD. FORECAST SOUNDINGS WITHIN WEAK
WARM SECTOR OVER FAR SERN LA/CENTRAL GULF COAST INDICATE SHALLOW
STABLE LAYER TOPPED BY WEAK LAPSE RATES...DESPITE INFLUX OF NEAR 70F
SURFACE DEW POINTS. THIS COMBINED WITH THE GENERAL VEERING WIND
PROFILES/WEAKENING SHEAR SHOULD LIMIT OVERALL SEVERE THREAT.

...CENTRAL CA COAST INTO THE INTERIOR VALLEYS...
INTENSE...FAST MOVING SHORTWAVE TROUGH NOW OFF THE CENTRAL CA COAST
WILL OVERSPREAD THE REGION TODAY AS IT SHIFTS ESEWD. SHEAR WILL
REMAIN QUITE STRONG ALONG NOSE OF 80+ KT MID LEVEL JET NOSING INTO
THE CENTRAL CA VALLEYS...ALTHOUGH REGION WILL LIKELY REMAIN
SOCKED-IN WITH CLOUDS/PRECIPITATION SUGGESTING VERY LIMITED
INSTABILITY. ALTHOUGH A FEW EMBEDDED THUNDERSTORMS CAN BE
EXPECTED...ACTIVITY WILL LIKELY REMAIN ELEVATED ATOP STABLE NEAR
SURFACE LAYER WITH MINIMAL SEVERE POTENTIAL.

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KIWX [121942]: Preliminary Local Storm Report

NWUS53 KIWX 121942
LSRIWX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
242 PM EST SAT DEC 12 2009

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

0800 AM HEAVY SNOW 5 NNW DOWAGIAC 42.06N 86.15W
12/11/2009 M17.3 INCH CASS MI COCORAHS

STORM TOTAL SNOWFALL FROM LAKE EFFECT ENDING AT 800 AM
EST ON 12 11 09.

&&

EVENT NUMBER IWX0900134

$$

LASHLEY

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KPIH [121939]: Preliminary Local Storm Report

NWUS55 KPIH 121939
LSRPIH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO
1239 PM MST SAT DEC 12 2009

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

1237 PM SNOW WESTON 42.04N 111.98W
12/12/2009 M3.0 INCH FRANKLIN ID TRAINED SPOTTER

STORM TOTAL SINCE SNOW BEGAN THIS MORNING

&&

$$

JMESSICK

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KREV [121911]: Preliminary Local Storm Report

NWUS55 KREV 121911
LSRREV

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RENO NV
1111 AM PST SAT DEC 12 2009

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

0730 AM SNOW 1 NE INCLINE VILLAGE 39.26N 119.94W
12/12/2009 M4.0 INCH WASHOE NV TRAINED SPOTTER

4 INCHES SNOW PAST 24 HOURS AS OF 0730 PST

0800 AM SNOW 5 ENE CISCO 39.32N 120.45W
12/12/2009 M10.0 INCH NEVADA CA TRAINED SPOTTER

10 INCHES PAST 24 HOURS AS OF 0800 PST. 1.9 INCHES WATER
EQUIVALENT.

0800 AM SNOW 4 SSW SUSANVILLE 40.33N 120.60W
12/12/2009 M7.0 INCH LASSEN CA TRAINED SPOTTER

7 INCHES PAST 24 HOURS ENDING AT 0800.

0800 AM SNOW MAMMOTH LAKES 37.64N 118.96W
12/12/2009 M6.0 INCH MONO CA CO-OP OBSERVER

6 INCHES PAST 24 HOURS AT MAMMOTH LAKES RANGER STATION.
WATER EQUIVALENT .42 INCHES.

0830 AM SNOW PORTOLA 39.80N 120.47W
12/12/2009 M3.0 INCH PLUMAS CA CO-OP OBSERVER

3 INCHES PAST 24 HOURS AS OF 0830 PST. WATER EQUIVALENT
.51 INCHES.

0911 AM SNOW 1 N COLD SPRINGS VALLEY 39.68N 119.96W
12/12/2009 M3.0 INCH WASHOE NV TRAINED SPOTTER

OVERNIGHT TOTAL.

0958 AM SNOW 1 NE CARSON CITY 39.18N 119.75W
12/12/2009 M1.0 INCH CARSON CITY NV TRAINED SPOTTER

ONE INCH NEW SNOW OVERNIGHT WITH 0.09 INCHES WATER
EQUIVALENT. 7 INCHES OF SNOW DEPTH.

1000 AM SNOW 2 SE SPANISH SPRINGS 39.65N 119.69W
12/12/2009 M3.0 INCH WASHOE NV TRAINED SPOTTER

3 INCHES OF NEW SNOW OVERNIGHT WITH 0.28 INCHES LIQUID
EQUIVALENT.

1032 AM SNOW HEAVENLY VALLEY 38.96N 119.89W
12/12/2009 M6.0 INCH DOUGLAS NV TRAINED SPOTTER

TOTAL OVERNIGHT SNOWFALL AT HEAVENLY SKI RESORT LAKE
TAHOE.

1034 AM SNOW MOUNT ROSE SKI AREA 39.33N 119.89W
12/12/2009 M6.0 INCH WASHOE NV TRAINED SPOTTER

TOTAL OVERNIGHT SNOWFALL TOTAL AT MOUNT ROSE SKI RESORT.

1035 AM SNOW HOMEWOOD 39.08N 120.16W
12/12/2009 M8.0 INCH PLACER CA TRAINED SPOTTER

OVERNIGHT SNOWFALL TOTAL ON THE UPPER MOUNTAIN AT
HOMEWOOD SKI RESORT. 6 INCHES WAS REPORTED AT THE LOWER
MOUNTAIN.

1037 AM SNOW SQUAW VALLEY 39.20N 120.22W
12/12/2009 M8.0 INCH PLACER CA TRAINED SPOTTER

OVERNIGHT SNOWFALL TOTAL AT 8200 FEET AT SQUAW VALLEY USA
SKI RESORT. 6 INCHES WAS REPORTED AT 6200 FEET.

1038 AM SNOW NORTHSTAR 39.28N 120.12W
12/12/2009 M8.0 INCH PLACER CA TRAINED SPOTTER

OVERNIGHT SNOWFALL TOTAL REPORTED AT NORTHSTAR AT TAHOE
SKI RESORT.

1045 AM SNOW BOCA RESERVOIR 39.40N 120.09W
12/12/2009 M3.0 INCH NEVADA CA CO-OP OBSERVER

OVERNIGHT SNOWFALL TOTAL WITH 10 INCHES ON THE GROUND.

1046 AM SNOW BRIDGEPORT 38.26N 119.22W
12/12/2009 M3.5 INCH MONO CA CO-OP OBSERVER

OVERNIGHT SNOWFALL TOTAL WITH 8 INCHES ON THE GROUND
REPORTED.

1047 AM SNOW LEE VINING 37.96N 119.12W
12/12/2009 M2.0 INCH MONO CA CO-OP OBSERVER

OVERNIGHT SNOWFALL TOTAL WITH 3 INCHES ON THE GROUND
REPORTED.

1048 AM SNOW MINDEN 38.96N 119.77W
12/12/2009 M1.0 INCH DOUGLAS NV CO-OP OBSERVER

OVERNIGHT SNOWFALL TOTAL WITH 2 INCHES ON THE GROUND
REPORTED.

1049 AM SNOW RENO 39.54N 119.82W
12/12/2009 M3.0 INCH WASHOE NV CO-OP OBSERVER

OVERNIGHT SNOWFALL TOTAL WITH 7 INCHES ON THE GROUND
REPORTED AT THE RENO TAHOE INTERNATIONAL AIRPORT.

1050 AM SNOW 5 N RENO 39.61N 119.82W
12/12/2009 M4.0 INCH WASHOE NV OFFICIAL NWS OBS

OVERNIGHT SNOWFALL TOTAL WITH 11 INCHES ON THE GROUND AT
THE NATIONAL WEATHER SERVICE FORECAST OFFICE.

1053 AM SNOW SPANISH SPRINGS 39.62N 119.72W
12/12/2009 M3.0 INCH WASHOE NV CO-OP OBSERVER

OVERNIGHT SNOWFALL TOTAL WITH 11 INCHES CURRENTLY ON THE
GROUND.

1054 AM SNOW SOUTH LAKE TAHOE 38.94N 119.98W
12/12/2009 M3.0 INCH EL DORADO CA CO-OP OBSERVER

OVERNIGHT SNOWFALL TOTAL WITH 9 INCHES ON THE GROUND
REPORTED AT THE TAHOE VALLEY AIRPORT.

1103 AM SNOW 2 NE TAHOE CITY 39.19N 120.11W
12/12/2009 M3.0 INCH PLACER CA CO-OP OBSERVER

OVERNIGHT SNOWFALL TOTAL WITH 16 INCHES REPORTED ON THE
GROUND AT THE USCG STATION LAKE TAHOE.

1104 AM SNOW TRUCKEE 39.33N 120.20W
12/12/2009 M3.0 INCH NEVADA CA CO-OP OBSERVER

OVERNIGHT SNOWFALL TOTAL WITH 12 INCHES REPORTED ON THE
GROUND AT THE TAHOE TRUCKEE AIRPORT. OBSERVER REPORTED
0.30 INCHES OF PRECIPITATION.

1108 AM SNOW VIRGINIA CITY 39.31N 119.64W
12/12/2009 M3.0 INCH STOREY NV CO-OP OBSERVER

OVERNIGHT SNOWFALL TOTAL WITH 12 INCHES REPORTED ON THE
GROUND.

&&

$$

MCGUIRE

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KBOI [121855]: Preliminary Local Storm Report

NWUS55 KBOI 121855
LSRBOI

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOISE ID
1155 AM MST SAT DEC 12 2009

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

0530 AM SNOW 1 SSE KUNA 43.48N 116.41W
12/12/2009 M0.6 INCH ADA ID COCORAHS

0600 AM SNOW 2 E NAMPA 43.58N 116.52W
12/12/2009 M0.4 INCH CANYON ID COCORAHS

0700 AM SNOW 6 SE BOISE 43.55N 116.14W
12/12/2009 M0.4 INCH ADA ID COCORAHS

0700 AM SNOW 9 SSE MCCALL 44.79N 116.04W
12/12/2009 M0.7 INCH VALLEY ID COCORAHS

0700 AM SNOW 6 SSE BUHL 42.52N 114.72W
12/12/2009 M0.3 INCH TWIN FALLS ID COCORAHS

0700 AM SNOW 5 NE BOISE 43.66N 116.16W
12/12/2009 M0.4 INCH ADA ID COCORAHS

0700 AM SNOW 4 WNW BOISE 43.63N 116.30W
12/12/2009 M0.5 INCH ADA ID COCORAHS

0700 AM SNOW 3 N CALDWELL 43.70N 116.68W
12/12/2009 M0.5 INCH CANYON ID COCORAHS

0700 AM SNOW 3 NNE MIDDLETON 43.75N 116.60W
12/12/2009 M0.6 INCH CANYON ID COCORAHS

0700 AM SNOW 8 NNW BOISE 43.71N 116.29W
12/12/2009 M0.4 INCH ADA ID COCORAHS

0700 AM SNOW 2 NNE PAYETTE 44.10N 116.91W
12/12/2009 M0.5 INCH PAYETTE ID COCORAHS

0700 AM SNOW 7 NNW CALDWELL 43.75N 116.73W
12/12/2009 M0.0 INCH CANYON ID COCORAHS

ONLY A TRACE OF NEW SNOW.

0715 AM SNOW 1 N GLENNS FERRY 42.97N 115.30W
12/12/2009 M0.6 INCH ELMORE ID COCORAHS

0800 AM SNOW S HALFWAY 44.87N 117.11W
12/12/2009 M1.0 INCH BAKER OR TRAINED SPOTTER

0800 AM SNOW 4 WSW TWIN FALLS 42.54N 114.54W
12/12/2009 M0.5 INCH TWIN FALLS ID COCORAHS

0900 AM SNOW 3 NNW MERIDIAN 43.65N 116.42W
12/12/2009 M0.2 INCH ADA ID NWS EMPLOYEE

1100 AM SNOW 3 SSE BOISE 43.57N 116.20W
12/12/2009 M0.4 INCH ADA ID OFFICIAL NWS OBS

BOISE AIRPORT REPORTED 0.4 INCHES OF NEW SNOW SINCE
MIDNIGHT.

1118 AM SNOW 7 NW MCCALL 44.99N 116.21W
12/12/2009 M1.0 INCH ADAMS ID PUBLIC

BUNDAGE SNOW STAKE CAM SHOWED 1 INCH OF NEW SNOW SINCE
MIDNIGHT.

1120 AM SNOW 12 NE BOISE 43.73N 116.06W
12/12/2009 E0.5 INCH BOISE ID PUBLIC

BOGUS BASIN SNOW STAKE SHOWED 0.5 INCHES OF NEW SNOW
SINCE MIDNIGHT.

1153 AM SNOW 2 S MARSING 43.52N 116.81W
12/12/2009 M1.0 INCH OWYHEE ID TRAINED SPOTTER

&&

$$

JSMITH

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DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 121722
SWODY2
SPC AC 121721

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1121 AM CST SAT DEC 12 2009

VALID 131200Z - 141200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
ALTHOUGH BROAD LONGWAVE TROUGH IS SITUATED OVER THE WRN TWO-THIRDS
OF NORTH AMERICA...PRIMARILY STRONG ZONAL FLOW WILL PERSIST OVER THE
CONUS THROUGH SUNDAY. HEIGHTS WILL RISE SLIGHTLY OVER THE SERN
STATES/MID ATLANTIC REGION DURING THE DAY...AS A SHORTWAVE TROUGH
MOVES EWD THROUGH THE OH VALLEY AND OFF THE NRN ATLANTIC COAST
SUNDAY NIGHT. INCREASING SLY LOW LEVEL WINDS WILL AID IN LIFTING A
SURFACE BOUNDARY NWD FROM THE GULF...AND SHOULD EXTEND ROUGHLY FROM
SRN MS/LA NEWD INTO THE ERN SC/NC DURING MUCH OF THE FORECAST
PERIOD.

FURTHER WEST...ANOTHER IMPULSE IS FORECAST TO SHIFT EWD FROM THE SRN
GREAT BASIN INTO THE SRN ROCKIES...AHEAD OF A STRONGER IMPULSE
DROPPING SEWD FROM CANADA INTO THE NRN ROCKIES. HOWEVER...SWD PUSH
OF ARCTIC AIR THROUGH THE PLAINS STATES INTO AN ALREADY STABLE AIR
MASS WILL INHIBIT CONVECTIVE DEVELOPMENT WITH THESE SYSTEMS.

...ERN CAROLINAS...
UPPER WAVE MOVING THROUGH THE OH VALLEY MAY INDUCE A WEAK WAVE ALONG
THE BOUNDARY IN THE ERN CAROLINAS SUNDAY MORNING/EARLY AFTERNOON.
SOUTH OF THIS BOUNDARY...MODIFIED GULF MOISTURE RETURN IS
EXPECTED...WITH DEWPOINTS IN THE LOWER TO MID 60S. SINCE THE
STRONGER LARGE SCALE ASCENT WILL BE LOCATED WELL NORTH OF THE
BOUNDARY...MOST PCPN WILL BE OCCUR IN THE COLD SECTOR. WHILE
CONVECTION IS POSSIBLE IN WARM SECTOR...DURING THE MORNING...
FORECAST SOUNDINGS SHOW TREMENDOUS LOW/DEEP LAYER SHEAR...BUT
UPDRAFTS ROOTED AROUND 850 MB. A WARMING BOUNDARY LAYER MAY RESULT
IN ANY STORM UPDRAFTS INGESTING SURFACE BASED PARCELS LATER IN THE
DAY. HOWEVER...VEERING LOW LEVEL WINDS/WEAKENING SHEAR...COMBINED
WITH NEUTRAL OR SLIGHTLY RISING HEIGHTS SUGGEST STRONGER
CONVERGENCE/STORMS WILL BE LOCATED EAST OF THE INLAND AREAS IN THE
ATLANTIC. THEREFORE...OVERALL SEVERE THREAT APPEARS LIMITED.

...GULF COAST THROUGH NRN FL...
WHILE WEAK INSTABILITY IS EXPECTED IN THE WARM SECTOR...VEERING LOW
LEVEL WINDS AND MASS CONVERGENCE...ALONG WITH NEUTRAL TO SLIGHTLY
RISING 500 MB HEIGHTS SHOULD DAMPEN THE THREAT FOR SEVERE STORMS.

..IMY.. 12/12/2009

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KMFR [121634]: Preliminary Local Storm Report

NWUS56 KMFR 121634
LSRMFR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OR
834 AM PST SAT DEC 12 2009

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

0833 AM ICE STORM 2 SE CAVE JUNCTION 42.15N 123.62W
12/12/2009 JOSEPHINE OR TRAINED SPOTTER

BLACK ICE ON HWY 46. TRAFFIC MOVING SLOWLY.

&&

$$

STOCKTON

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 121626
SWODY1
SPC AC 121625

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1025 AM CST SAT DEC 12 2009

VALID 121630Z - 131200Z

...NO SVR TSTM AREAS FORECAST...

...LOWER MS RIVER VALLEY INTO THE SOUTHEAST...
SURFACE FRONT WILL CONTINUE TO LIFT SLOWLY NWD AND POSSIBLY COME
ASHORE ACROSS THE MS RIVER DELTA REGION LATE TODAY/TONIGHT AS WEAK
SURFACE LOW DEVELOPS INTO CENTRAL LA. THIS WILL OCCUR AS LOW
AMPLITUDE SHORTWAVE TROUGHS EJECTS ACROSS THE CENTRAL U.S...LEAVING
BROAD VEERING LOW LEVEL WIND FIELDS EVOLVING ACROSS THE GULF COAST
REGION. LOW LEVEL WAA REGIME WILL LIKELY MAINTAIN ELEVATED MOIST
CONVECTION AND SCATTERED THUNDERSTORM DEVELOPMENT FROM FAR ERN
TX/AR/LA ENEWD THROUGH THE PERIOD. FORECAST SOUNDINGS WITHIN WEAK
WARM SECTOR OVER FAR SERN LA/CENTRAL GULF COAST INDICATE SHALLOW
STABLE LAYER TOPPED BY WEAK LAPSE RATES...DESPITE INFLUX OF NEAR 70F
SURFACE DEW POINTS. THIS COMBINED WITH THE GENERAL VEERING WIND
PROFILES/WEAKENING SHEAR SHOULD LIMIT OVERALL SEVERE THREAT.

...CENTRAL CA COAST INTO THE INTERIOR VALLEYS...
INTENSE...FAST MOVING SHORTWAVE TROUGH NOW OFF THE CENTRAL CA COAST
WILL OVERSPREAD THE REGION TODAY AS IT SHIFTS ESEWD. SHEAR WILL
REMAIN QUITE STRONG ALONG NOSE OF 80+ KT MID LEVEL JET NOSING INTO
THE CENTRAL CA VALLEYS...ALTHOUGH REGION WILL LIKELY REMAIN
SOCKED-IN WITH CLOUDS/PRECIPITATION SUGGESTING VERY LIMITED
INSTABILITY. ALTHOUGH A FEW EMBEDDED THUNDERSTORMS CAN BE
EXPECTED...ACTIVITY WILL LIKELY REMAIN ELEVATED ATOP STABLE NEAR
SURFACE LAYER WITH MINIMAL SEVERE POTENTIAL.

..EVANS.. 12/12/2009

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KREV [121442]: Preliminary Local Storm Report

NWUS55 KREV 121442
LSRREV

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RENO NV
642 AM PST SAT DEC 12 2009

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

0600 AM HEAVY SNOW 4 E VERDI 39.52N 119.93W
12/12/2009 M7.0 INCH WASHOE NV TRAINED SPOTTER

7 INCHES NEW SNOW SINCE ABOUT 9PM LAST NIGHT. CURRENTLY
29 F DEGREES WITH MODERATE TO HEAVY SNOWFALL.

0615 AM HEAVY SNOW 4 SSW RENO 39.49N 119.86W
12/12/2009 M4.5 INCH WASHOE NV TRAINED SPOTTER

4.5 INCHES NEW SNOW SINCE 9PM LAST NIGHT.

0640 AM HEAVY SNOW 5 NNW RENO 39.61N 119.86W
12/12/2009 M4.5 INCH WASHOE NV OFFICIAL NWS OBS

4.5 INCHES NEW SNOWFALL SINCE 9PM LAST NIGHT.

&&

$$

JKIELHOR

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KPQR [121434]: Preliminary Local Storm Report

NWUS56 KPQR 121434
LSRPQR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PORTLAND OR
634 AM PST SAT DEC 12 2009

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

0940 PM ICE STORM EUGENE 44.05N 123.11W
12/11/2009 LANE OR BROADCAST MEDIA

1/8 TO 1/4 INCH OF ICE ON ROADS. A LOT OF ACCIDENTS.

&&

$$

JWOLFE

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 121301
SWODY1
SPC AC 121259

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0659 AM CST SAT DEC 12 2009

VALID 121300Z - 131200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
TWO-STREAM ZONAL FLOW WILL PREVAIL OVER THE LWR 48 THROUGH EARLY
SUN. THE SRN BRANCH JET...EXTENDING FROM OFF THE CA CST ESE ACROSS
THE SWRN STATES...THE SRN RCKYS...AND THE SRN PLNS...WILL REMAIN THE
JET OF INTEREST AS FAR AS DEEP CONVECTION IS CONCERNED. TWO
PERTURBATIONS IN THE FLOW...ONE NOW OVER N CNTRL MEXICO/SW TX AND
THE OTHER OVER THE PACIFIC NEAR 130W...WILL BE THE MAIN FEATURES
AFFECTING TSTM DEVELOPMENT.

AT LWR LVLS...SFC LOW NOW OFF THE MIDDLE TX GULF CST WILL MOVE
SLOWLY NE THROUGH THE PERIOD...REACHING THE BPT AREA THIS EVE AND
CNTRL MS BY 12Z SUN. ASSOCIATED WARM/STNRY FRONT EXTENDING ESE FROM
THE LOW WILL ALSO MOVE NEWD...AND SHOULD MOVE ASHORE OVER SERN
LA/CSTL MS LATER TODAY/TONIGHT. BUT OVERALL NEWD MOTION OF FRONT
LIKELY WILL BE SLOWER THAN THAT OF LOW AS SHALLOW LAYER OF RESIDUAL
COLD AIR ONLY GRUDGINGLY GIVES AWAY OVER INTERIOR PARTS OF THE
CNTRL/ERN GULF CST STATES.

...CNTRL GULF CST...
LOW-LVL WAA/MOISTURE INFLOW WILL SPREAD NE ACROSS THE CNTRL GULF CST
REGION THROUGH EARLY SUN...ELONGATING ALONG NE-SW AXIS N AND NE OF
SFC WARM FRONT. THIS WILL ALLOW ELEVATED CONVECTION NOW OVER E TX
AND LA TO SPREAD FARTHER E/NE WITH TIME AS NRN MEXICO/SW TX UPR VORT
CONTINUES ENEWD.

AS SFC FRONT EDGES INLAND ACROSS SRN LA...LOW-LVL SHEAR
WILL BE SUPPORTIVE OF SUSTAINED STORMS/SUPERCELLS ALONG THE CST AND
INLAND TO AREAS JUST N OF FRONT. FCST HODOGRAPHS SUGGEST 0-1 KM SRH
OF 100-200 J/KG...WITH SFC-BASED CAPE LIMITED TO AOB 1000 J/KG BY
WEAK MID LVL LAPSE RATES. THE STRONGEST LARGE SCALE FORCING FOR
ASCENT LIKELY WILL REMAIN N OF FRONT...AND CLOUDS WILL LIMIT SFC
HEATING. THUS...PROSPECTS FOR TRULY SFC-BASED STORMS DO NOT APPEAR
GREAT. FURTHERMORE...ANY STORMS THAT DO FORM IN THE WARM SECTOR
WILL HAVE WEAKER LOW LVL SHEAR GIVEN VEERED FLOW S OF FRONT.
NONETHELESS...GIVEN INCREASING LOW LVL MOISTURE INFLOW...MODERATE
SHEAR...AND AT LEAST SOME POTENTIAL FOR SFC AND/OR NEAR-SFC-BASED
STORMS...A CONDITIONAL THREAT FOR LOCALLY DMGG WINDS OR A TORNADO
WILL EXIST LATER TODAY THROUGH EARLY SUN.

...CNTRL/NRN CA...
E PACIFIC UPR IMPULSE APPEARS ELONGATED IN SATELLITE IMAGERY
ATTM...WITH ASSOCIATED JET STREAK EXTENDING UPSTREAM TOWARD
40N/140W. THIS SUGGESTS THAT SYSTEM MAY SOMEWHAT AMPLIFY AS IT
CONTINUES ESEWD...BUT THAT STRONGEST FORCING FOR ASCENT WILL REACH
CA THIS EVE/TONIGHT...WELL AFTER MAX DIURNAL HEATING.
NEVERTHELESS...THE DISTURBANCE WILL BE ACCOMPANIED BY CONSIDERABLE
LOW-LVL AND DEEP SHEAR. HODOGRAPHS LIKELY WILL BECOME FAVORABLE FOR
SUPERCELLS AND/OR SMALL BOWS BY LATE IN THE DAY...ESPECIALLY OVER
THE SACRAMENTO VLY...WHERE NEAR-SFC FLOW WILL REMAIN BACKED BY
TERRAIN. GIVEN THE LIKELIHOOD FOR EXTENSIVE CLOUD COVER THIS
AFTN...UNCERTAINTY EXISTS REGARDING DEGREE OF LOW LVL
DESTABILIZATION FOR SUSTAINED SFC-BASED UPDRAFTS PRIOR TO SUNDOWN.
ATTM THREAT REMAINS TOO LOW/ CONDITIONAL TO JUSTIFY A SVR OTLK. BUT
AT LEAST LOW SVR PROBABILITIES MAY BE NEEDED IN LATER OUTLOOKS IF
THE PROSPECTS FOR AFTN HEATING INCREASE.

..CORFIDI.. 12/12/2009

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MESO: Mesoscale Discussion 2246

ACUS11 KWNS 121056
SWOMCD
SPC MCD 121055
NYZ000-121400-

MESOSCALE DISCUSSION 2246
NWS STORM PREDICTION CENTER NORMAN OK
0455 AM CST SAT DEC 12 2009

AREAS AFFECTED...UPSTATE NY

CONCERNING...HEAVY SNOW

VALID 121055Z - 121400Z

LONG-LIVED LES BAND AFFECTING AREAS OF UPSTATE NY E OF LAKE ONTARIO
IS EXPECTED TO DISSIPATE THIS MORNING.

UPPER LEVEL HEIGHT RISES ARE FORECAST TO CONTINUE THROUGH THE
AFTERNOON ACROSS THE NEW ENGLAND AREA IN RESPONSE TO A BROAD ZONE OF
LOW LEVEL WAA. RESULTANT WARMING OF 850-700 MB TEMPERATURES OVER
LAKE ONTARIO WILL AID IN WEAKENING LOW LEVEL LAPSE RATES. IN
ADDITION...SHORT TERM MODEL GUIDANCE INDICATES VEERING AND WEAKENING
OF 850 MB FLOW AND BACKING SURFACE WINDS WITH TIME DURING SATURDAY
MORNING. LOSS IN LAKE INDUCED CONVECTIVE INSTABILITY AND
INCREASINGLY UNFAVORABLE WIND PROFILES WILL RESULT IN DECREASING
SENSIBLE AND LATENT HEAT FLUX...UNFAVORABLE DIRECTIONAL SHEAR...AND
DECREASING LEE SIDE CONVERGENCE ALONG THE ERN SHORE OF LAKE ONTARIO.
THUS...THE DEMISE OF THE MULTI-DAY LES BAND IS ANTICIPATED BY LATE
MORNING...AS SUGGESTED BY HI-RES 4KM NMM GUIDANCE.

..GARNER.. 12/12/2009

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

...NOTICE...
SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A
SCHEDULED BASIS FROM DECEMBER 1 THROUGH FEBRUARY 28...FOUR
TIMES A DAY...AROUND 00 UTC...06 UTC...12 UTC...AND 18 UTC
FOR SIGNIFICANT SHORT RANGE WINTER WEATHER EVENTS.

ATTN...WFO...ALY...BGM...BUF...

LAT...LON 43087699 43287716 43547701 43647618 43627506 43317486
43037508 42997595 43087699

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DAY48SVR: Nws Storm Prediction Center Norman Ok

ACUS48 KWNS 120829
SWOD48
SPC AC 120828

DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0228 AM CST SAT DEC 12 2009

VALID 151200Z - 201200Z

...DISCUSSION...

DAY 4

GFS...ECMWF AND MREF MEMBERS CONTINUE PROGRESSIVE NRN STREAM UPPER
TROUGH THROUGH THE GREAT LAKES...OH AND TN VALLEYS. GFS MAINTAINS
PHASING BETWEEN THE NRN AND A SRN STREAM SHORTWAVE TROUGH...WHILE
THE ECMWF CUTS OFF THE SRN TROUGH OVER TX/NM WITH WEAKER LOW-MID
LEVEL FLOW IN DOWNSTREAM WARM SECTOR. IN EITHER CASE...A COLD FRONT
WILL ADVANCE SEWD THROUGH THE REMAINDER OF THE SERN STATES IN
ASSOCIATION WITH THE STRONGER NRN STREAM TROUGH. WEAK INSTABILITY
WILL CHARACTERIZE THE PRE-FRONTAL WARM SECTOR WHERE VERTICAL SHEAR
WILL BE AT LEAST MARGINALLY SUPPORTIVE OF ORGANIZED STORMS. A LOW
RISK FOR SEVERE STORMS MAY EXIST WITH CONVECTION DEVELOPING ALONG
AND AHEAD OF THE SEWD ADVANCING COLD FRONT...BUT OVERALL THREAT
APPEARS TOO MARGINAL TO DELINEATE AN OUTLOOK AREA AT THIS TIME.

DAY 5-8

CP HIGH PRESSURE WILL BUILD SWD THROUGH THE U.S. IN WAKE OF COLD
FRONT THAT WILL PUSH THROUGH MUCH OF THE FL PENINSULA DAY 5 WHERE
SEVERE STORM THREAT WILL BE LOW. OTHERWISE...OFFSHORE FLOW WILL
MAINTAIN A STABLE BOUNDARY LAYER AND PRECLUDE A THREAT FOR SEVERE
STORMS THIS PERIOD.

..DIAL.. 12/12/2009

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KMFR [120748]: Preliminary Local Storm Report

NWUS56 KMFR 120748
LSRMFR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OR
1147 PM PST FRI DEC 11 2009

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

1145 PM SNOW 3 NW MOUNT SHASTA 41.35N 122.35W
12/11/2009 M1.0 INCH SISKIYOU CA TRAINED SPOTTER

LIGHT GRANULAR SNOW BEGAN AROUND 2030 PST. LARGE
SNOWFLAKES FALLING MODERATELY BEGAN AROUND 2200 PST.
ACCUMULATION, MAINLY SINCE 2200 PST HAS BEEN ONE INCH.

&&

$$

LUTZ

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