KUNR [010304]: Preliminary Local Storm Report...summary

NWUS53 KUNR 010304
LSRUNR

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE RAPID CITY SD
903 PM MDT SAT APR 30 2011

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

0622 AM NON-TSTM WND GST BUFFALO 45.58N 103.55W
04/30/2011 M77.00 MPH HARDING SD ASOS

0656 AM HIGH SUST WINDS BUFFALO 45.58N 103.55W
04/30/2011 M58.00 MPH HARDING SD ASOS

0730 AM HIGH SUST WINDS 1 NW NISLAND 44.68N 103.57W
04/30/2011 M47.00 MPH BUTTE SD MESONET

0755 AM HIGH SUST WINDS ELLSWORTH AFB 44.15N 103.10W
04/30/2011 M45.00 MPH MEADE SD OTHER FEDERAL

0800 AM NON-TSTM WND GST WALL 43.99N 102.24W
04/30/2011 M63.00 MPH PENNINGTON SD MESONET

0800 AM NON-TSTM WND GST 11 W WRIGHT 43.75N 105.73W
04/30/2011 E60.00 MPH CAMPBELL WY TRAINED SPOTTER

0804 AM HIGH SUST WINDS 1 SSW SOUTH EAGLE BUTTE 44.98N 101.24W
04/30/2011 M42.00 MPH ZIEBACH SD MESONET

0805 AM HIGH SUST WINDS BISON 45.52N 102.46W
04/30/2011 M50.00 MPH PERKINS SD MESONET

0815 AM NON-TSTM WND GST RAPID CITY AIRPORT 44.04N 103.06W
04/30/2011 M61.00 MPH PENNINGTON SD ASOS

0820 AM HIGH SUST WINDS 8 S WALL 43.88N 102.24W
04/30/2011 M45.00 MPH PENNINGTON SD MESONET

0822 AM NON-TSTM WND GST DOWNTOWN RAPID CITY 44.08N 103.23W
04/30/2011 M60.00 MPH PENNINGTON SD OFFICIAL NWS OBS

0825 AM NON-TSTM WND GST FAITH 45.02N 102.03W
04/30/2011 M60.00 MPH MEADE SD ASOS

0829 AM NON-TSTM WND GST ELLSWORTH AFB 44.15N 103.10W
04/30/2011 M66.00 MPH MEADE SD OTHER FEDERAL

0830 AM NON-TSTM WND GST DOWNTOWN BELLE FOURCHE 44.67N 103.85W
04/30/2011 M58.00 MPH BUTTE SD MESONET

TIME ESTIMATED

0830 AM NON-TSTM WND GST DOWNTOWN SPEARFISH 44.50N 103.86W
04/30/2011 M59.00 MPH LAWRENCE SD MESONET

TIME ESTIMATED

0840 AM HIGH SUST WINDS 2 E COTTONWOOD 43.96N 101.86W
04/30/2011 M43.00 MPH JACKSON SD MESONET

0847 AM NON-TSTM WND GST PHILIP 44.05N 101.67W
04/30/2011 M61.00 MPH HAAKON SD ASOS

0856 AM NON-TSTM WND GST 32 N DOWNTOWN BELLE FOU 45.13N 103.85W
04/30/2011 M66.00 MPH BUTTE SD MESONET

0900 AM NON-TSTM WND GST S DOWNTOWN STURGIS 44.41N 103.51W
04/30/2011 M66.00 MPH MEADE SD TRAINED SPOTTER

0909 AM NON-TSTM WND GST 9 N BOX ELDER 44.25N 103.07W
04/30/2011 M69.00 MPH MEADE SD NWS EMPLOYEE

0911 AM NON-TSTM WND GST FAITH 45.02N 102.03W
04/30/2011 M66.00 MPH MEADE SD ASOS

0935 AM NON-TSTM WND GST RAPID CITY AIRPORT 44.04N 103.06W
04/30/2011 M62.00 MPH PENNINGTON SD ASOS

0936 AM NON-TSTM WND GST PHILIP 44.05N 101.67W
04/30/2011 M66.00 MPH HAAKON SD ASOS

0945 AM NON-TSTM WND GST E TILFORD 44.30N 103.43W
04/30/2011 E60.00 MPH MEADE SD TRAINED SPOTTER

0951 AM NON-TSTM WND GST 2 NE ECHETA 44.47N 105.83W
04/30/2011 M66.00 MPH CAMPBELL WY MESONET

0952 AM HIGH SUST WINDS RAPID CITY AIRPORT 44.04N 103.06W
04/30/2011 M44.00 MPH PENNINGTON SD ASOS

0955 AM NON-TSTM WND GST 3 ESE DOWNTOWN SPEARFIS 44.48N 103.80W
04/30/2011 M59.00 MPH LAWRENCE SD AWOS

1000 AM NON-TSTM WND GST 2 SE COLONY 44.85N 104.12W
04/30/2011 E70.00 MPH CROOK WY TRAINED SPOTTER

1006 AM NON-TSTM WND GST NEWELL 44.72N 103.42W
04/30/2011 M76.00 MPH BUTTE SD TRAINED SPOTTER

1015 AM NON-TSTM WND GST 1 SSW SOUTH EAGLE BUTTE 44.98N 101.24W
04/30/2011 M59.00 MPH ZIEBACH SD MESONET

1015 AM NON-TSTM WND GST 4 SW NEWELL 44.67N 103.47W
04/30/2011 M69.00 MPH BUTTE SD TRAINED SPOTTER

1020 AM NON-TSTM WND GST 6 W PARMELEE 43.32N 101.14W
04/30/2011 M59.00 MPH TODD SD MESONET

1026 AM NON-TSTM WND GST FAITH 45.02N 102.03W
04/30/2011 M71.00 MPH MEADE SD ASOS

1052 AM NON-TSTM WND GST 4 E DUPREE 45.05N 101.51W
04/30/2011 M59.00 MPH ZIEBACH SD MESONET

1100 AM HIGH SUST WINDS 2 W HAMILL 43.60N 99.72W
04/30/2011 M47.00 MPH TRIPP SD MESONET

1108 AM NON-TSTM WND GST PHILIP 44.05N 101.67W
04/30/2011 M67.00 MPH HAAKON SD ASOS

1155 AM HIGH SUST WINDS 1 SE MARTIN 43.16N 101.72W
04/30/2011 M45.00 MPH BENNETT SD MESONET

1200 PM NON-TSTM WND GST DUPREE 45.05N 101.59W
04/30/2011 M64.00 MPH ZIEBACH SD MESONET

TIME ESTIMATED

1200 PM NON-TSTM WND GST MOORCROFT 44.27N 104.95W
04/30/2011 E65.00 MPH CROOK WY TRAINED SPOTTER

1205 PM NON-TSTM WND GST 24 SE WRIGHT 43.50N 105.16W
04/30/2011 M57.00 MPH CAMPBELL WY MESONET

1209 PM NON-TSTM WND GST S DOWNTOWN STURGIS 44.41N 103.51W
04/30/2011 M71.00 MPH MEADE SD TRAINED SPOTTER

1210 PM NON-TSTM WND GST 2 E COTTONWOOD 43.96N 101.86W
04/30/2011 M58.00 MPH JACKSON SD MESONET

1215 PM HIGH SUST WINDS WHITE RIVER 43.57N 100.74W
04/30/2011 M43.00 MPH MELLETTE SD MESONET

1216 PM NON-TSTM WND GST RAPID CITY AIRPORT 44.04N 103.06W
04/30/2011 M67.00 MPH PENNINGTON SD ASOS

1220 PM NON-TSTM WND GST 6 W PARMELEE 43.32N 101.14W
04/30/2011 M64.00 MPH TODD SD MESONET

1220 PM NON-TSTM WND GST 8 S WALL 43.88N 102.24W
04/30/2011 M75.00 MPH PENNINGTON SD MESONET

1220 PM HIGH SUST WINDS 8 S WALL 43.88N 102.24W
04/30/2011 M56.00 MPH PENNINGTON SD MESONET

1220 PM HIGH SUST WINDS 6 W PARMELEE 43.32N 101.14W
04/30/2011 M49.00 MPH TODD SD MESONET

1224 PM NON-TSTM WND GST FAITH 45.02N 102.03W
04/30/2011 M75.00 MPH MEADE SD ASOS

1241 PM NON-TSTM WND GST 5 NE PORCUPINE 43.28N 102.26W
04/30/2011 M54.00 MPH SHANNON SD MESONET

1245 PM NON-TSTM WND GST 15 SW SUNDANCE 44.25N 104.59W
04/30/2011 M52.00 MPH CROOK WY MESONET

1246 PM NON-TSTM WND GST BUFFALO 45.58N 103.55W
04/30/2011 M74.00 MPH HARDING SD ASOS

1250 PM NON-TSTM WND GST BISON 45.52N 102.46W
04/30/2011 M63.00 MPH PERKINS SD MESONET

1255 PM NON-TSTM WND GST 3 ESE DOWNTOWN SPEARFIS 44.48N 103.80W
04/30/2011 M61.00 MPH LAWRENCE SD AWOS

1255 PM HIGH SUST WINDS 3 ESE DOWNTOWN SPEARFIS 44.48N 103.80W
04/30/2011 M48.00 MPH LAWRENCE SD AWOS

1256 PM HIGH SUST WINDS FAITH 45.02N 102.03W
04/30/2011 M54.00 MPH MEADE SD ASOS

1256 PM HIGH SUST WINDS BUFFALO 45.58N 103.55W
04/30/2011 M60.00 MPH HARDING SD ASOS

1256 PM HIGH SUST WINDS 32 N DOWNTOWN BELLE FOU 45.13N 103.85W
04/30/2011 M45.00 MPH BUTTE SD MESONET

1256 PM NON-TSTM WND GST 32 N DOWNTOWN BELLE FOU 45.13N 103.85W
04/30/2011 M62.00 MPH BUTTE SD MESONET

0101 PM NON-TSTM WND GST WINNER 43.37N 99.86W
04/30/2011 M59.00 MPH TRIPP SD ASOS

0108 PM NON-TSTM WND GST BUFFALO 45.58N 103.55W
04/30/2011 M82.00 MPH HARDING SD ASOS

0115 PM NON-TSTM WND GST KADOKA 43.83N 101.51W
04/30/2011 M65.00 MPH JACKSON SD MESONET

0129 PM NON-TSTM WND GST 3 NW SAINT ONGE 44.58N 103.76W
04/30/2011 M63.00 MPH LAWRENCE SD TRAINED SPOTTER

0156 PM HIGH SUST WINDS BUFFALO 45.58N 103.55W
04/30/2011 M60.00 MPH HARDING SD ASOS

0200 PM NON-TSTM WND GST 7 SW HERMOSA 43.77N 103.29W
04/30/2011 E70.00 MPH CUSTER SD TRAINED SPOTTER

0215 PM NON-TSTM WND GST ELLSWORTH AFB 44.15N 103.10W
04/30/2011 M68.00 MPH MEADE SD OTHER FEDERAL

0224 PM NON-TSTM WND GST DOWNTOWN RAPID CITY 44.08N 103.23W
04/30/2011 M62.00 MPH PENNINGTON SD OFFICIAL NWS OBS

0232 PM NON-TSTM WND GST RAPID CITY AIRPORT 44.04N 103.06W
04/30/2011 M67.00 MPH PENNINGTON SD ASOS

0240 PM NON-TSTM WND GST 19 SW UPTON 43.93N 104.93W
04/30/2011 E60.00 MPH WESTON WY TRAINED SPOTTER

0250 PM NON-TSTM WND GST DOWNTOWN RAPID CITY 44.08N 103.23W
04/30/2011 M67.00 MPH PENNINGTON SD OFFICIAL NWS OBS

0311 PM NON-TSTM WND GST 9 N BOX ELDER 44.25N 103.07W
04/30/2011 M71.00 MPH MEADE SD NWS EMPLOYEE

0330 PM NON-TSTM WND GST 19 ESE HERMOSA 43.73N 102.84W
04/30/2011 E60.00 MPH CUSTER SD TRAINED SPOTTER

0345 PM NON-TSTM WND GST 11 NNW PORCUPINE 43.38N 102.42W
04/30/2011 E60.00 MPH SHANNON SD CO-OP OBSERVER

0528 PM NON-TSTM WND GST WINNER 43.37N 99.86W
04/30/2011 M60.00 MPH TRIPP SD ASOS

&&

$$

JJOHNSON

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KBIS [010242]: Preliminary Local Storm Report

NWUS53 KBIS 010242
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
942 PM CDT SAT APR 30 2011

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

0941 PM HEAVY SNOW GRASSY BUTTE 47.39N 103.25W
04/30/2011 M13.0 INCH MCKENZIE ND CO-OP OBSERVER

&&

$$

LHUBER

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KSHV [010241]: Preliminary Local Storm Report

NWUS54 KSHV 010241
LSRSHV

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
941 PM CDT SAT APR 30 2011

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

0934 PM FUNNEL CLOUD 2 NE HUGHES SPRINGS 33.02N 94.61W
04/30/2011 CASS TX LAW ENFORCEMENT

STATE TROOPER REPORTS FUNNEL CLOUD 2 MILES NORTHEAST OF
HUGHES SPRINGS

&&

$$

MHEMINGW

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KSHV [010240]: Preliminary Local Storm Report

NWUS54 KSHV 010240
LSRSHV

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
939 PM CDT SAT APR 30 2011

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

0925 PM TORNADO HUGHES SPRINGS 33.00N 94.63W
04/30/2011 CASS TX LAW ENFORCEMENT

DEBRIS IN DOWNTOWN HUGHES SPRINGS, GOLF BALL SIZED HAIL,
TREES DOWN REPORTED BY STATE TROOPER

&&

$$

MHEMINGW

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KBIS [010234]: Preliminary Local Storm Report

NWUS53 KBIS 010234
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
934 PM CDT SAT APR 30 2011

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

0933 PM SNOW GLEN ULLIN 46.82N 101.83W
04/30/2011 M3.0 INCH MORTON ND CO-OP OBSERVER

&&

$$

LHUBER

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KBIS [010231]: Preliminary Local Storm Report...summary

NWUS53 KBIS 010231
LSRBIS

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE BISMARCK ND
930 PM CDT SAT APR 30 2011

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

0752 AM SNOW WATFORD CITY 47.80N 103.28W
04/30/2011 M7.0 INCH MCKENZIE ND CO-OP OBSERVER

TOTAL AS OF 8 AM CDT AND STILL SNOWING. 1/8 MILE
VISIBILITY. 45 MPH WINDS.

0752 AM NON-TSTM WND GST DICKINSON 46.88N 102.79W
04/30/2011 M68.00 MPH STARK ND ASOS

0819 AM SNOW 10 NW HALLIDAY 47.46N 102.49W
04/30/2011 M2.5 INCH DUNN ND PUBLIC

STORM TOTAL SNOWFALL AS OF 8 AM CDT

0832 AM BLIZZARD BEACH 46.92N 104.00W
04/30/2011 GOLDEN VALLEY ND TRAINED SPOTTER

ZERO VISIBILITY WITH 4 TO 5 INCHES ON THE GROUND. STILL
SNOWING AND VERY WINDY.

0909 AM BLIZZARD CROSBY 48.91N 103.29W
04/30/2011 DIVIDE ND TRAINED SPOTTER

ZERO VISIBILITY WITH 9 INCHES ON THE GROUND. STILL NO
POWER.

1017 AM NON-TSTM WND GST 1 WSW BOWBELLS 48.80N 102.27W
04/30/2011 M58.00 MPH BURKE ND MESONET

1059 AM BLIZZARD GRASSY BUTTE 47.39N 103.25W
04/30/2011 MCKENZIE ND CO-OP OBSERVER

ZERO VISIBILITY. 10 INCHES ON THE GROUND.

1100 AM NON-TSTM WND GST HETTINGER 46.00N 102.64W
04/30/2011 M67.00 MPH ADAMS ND ASOS

...SNOW AND 1/2 MILE VISIBILITY...

1127 AM SNOW 7 NW TAYLOR 46.97N 102.53W
04/30/2011 M1.0 INCH STARK ND CO-OP OBSERVER

24 HOUR SNOWFALL

1152 AM BLIZZARD WILLISTON 48.15N 103.63W
04/30/2011 WILLIAMS ND ASOS

...1/4 MILE VISIBILITY WITH LIGHT SNOW AND BLOWING
SNOW...WINDS SUSTAINED OVER 30 MPH WITH GUSTS UP TO 63
MPH...

1200 PM BLIZZARD BOWMAN 46.18N 103.39W
04/30/2011 BOWMAN ND EMERGENCY MNGR

GUSTS TO 60 MPH. TREES DOWN. VISIBILITY VARYING BUT NEAR
ZERO.

1210 PM NON-TSTM WND GST 10 WNW AMIDON 46.54N 103.52W
04/30/2011 M66.00 MPH SLOPE ND MESONET

MEASURED BY A RAWS SITE...

1210 PM NON-TSTM WND GST 5 SSW BOWMAN 46.12N 103.43W
04/30/2011 M65.00 MPH BOWMAN ND MESONET

MEASURED BY A NDDOT SITE...

1210 PM NON-TSTM WND GST 2 W RAY 48.34N 103.21W
04/30/2011 M66.00 MPH WILLIAMS ND MESONET

MEASURED BY A NDDOT SITE...

1256 PM NON-TSTM WND GST 9 W ALKABO 48.86N 104.09W
04/30/2011 M78.00 MPH SHERIDAN MT MESONET

MEASURED BY A RAWS SITE...

0114 PM NON-TSTM WND DMG STANLEY 48.32N 102.39W
04/30/2011 MOUNTRAIL ND BROADCAST MEDIA

ALONG HIGHWAY 2 FROM BERTHOLD TO STANELY... BROADCAST
MEDIA REPORTED 100 SNAPPED POWER POLES...

0114 PM NON-TSTM WND DMG BOWMAN 46.18N 103.39W
04/30/2011 BOWMAN ND EMERGENCY MNGR

DOWNED TREES... HOUSE DAMAGED BY FALLEN TREE... POWER
OUTAGES...

0156 PM NON-TSTM WND GST WILLISTON 48.15N 103.63W
04/30/2011 M63.00 MPH WILLIAMS ND ASOS

...VISIBILITY REMAINS BELOW 1/4 MILE WITH LIGHT SNOW...

0158 PM BLIZZARD DICKINSON 46.88N 102.79W
04/30/2011 STARK ND ASOS

...1/4 MILE VISIBILITY WITH LIGHT TO HEAVY SNOW...WINDS
SUSTAINED OVER 30 MPH AND GUSTS UP TO 60 MPH...

0200 PM NON-TSTM WND GST 2 NNE FRYBURG 46.90N 103.29W
04/30/2011 M58.00 MPH BILLINGS ND MESONET

MEASURED BY A NDDOT SITE...

0314 PM NON-TSTM WND DMG BOWMAN 46.18N 103.39W
04/30/2011 BOWMAN ND EMERGENCY MNGR

SUSTAINED WINDS AT 30 MPH GUSTING TO 52 MPH... A LOT OF
DOWNED TREES...RURAL POWER OUT... 4 INCHES OF SNOW...
NEAR ZERO VISIBILITY IN OPEN...RURAL AREAS...

0320 PM SNOW BOWMAN 46.18N 103.39W
04/30/2011 M4.0 INCH BOWMAN ND EMERGENCY MNGR

...STORM TOTAL THUS FAR...SNOW MELTING ON CONTACT WITH
GROUND...SUSTAINED WINDS AT 30 MPH GUSTING TO 50
MPH...VISBILITY LESS THAN 1/4 MILE...

0400 PM NON-TSTM WND DMG WILLISTON 48.15N 103.63W
04/30/2011 WILLIAMS ND NWS EMPLOYEE

LARGE TREE ON HOUSE LOCATED AT MAIN AND 11TH STREETS...
NUMEROUS DOWNED TREES...BRANCHES...FLAG POLES...ETC...

0453 PM BLIZZARD GRASSY BUTTE 47.39N 103.25W
04/30/2011 MCKENZIE ND CO-OP OBSERVER

STILL NEAR ZERO VISIBILITY. 1 FOOT OF SNOW THUS FAR.

0530 PM HEAVY SNOW WATFORD CITY 47.80N 103.28W
04/30/2011 E6.0 INCH MCKENZIE ND EMERGENCY MNGR

BLIZZARD CONDITIONS WITH 60 TO 70 MPH WINDS. POWER
OUTAGES OVER PARTS OF MCKENZIE COUNTY. SEMI TRUCKS
JACKKNIFED ON HIGHWAY 22 NORTH OF KILLDEER.

0800 PM HEAVY SNOW WILLISTON 48.15N 103.63W
04/30/2011 M7.9 INCH WILLIAMS ND OFFICIAL NWS OBS

0816 PM HEAVY SNOW TROTTERS 47.32N 103.92W
04/30/2011 M14.0 INCH GOLDEN VALLEY ND CO-OP OBSERVER

0904 PM SNOW MINOT 48.23N 101.30W
04/30/2011 E2.0 INCH WARD ND BROADCAST MEDIA

TOTAL SO FAR. STILL SNOWING.

0904 PM SNOW HARVEY 47.77N 99.94W
04/30/2011 E2.0 INCH WELLS ND BROADCAST MEDIA

2 INCHES SO FAR. STILL SNOWING.

0911 PM SNOW PARSHALL 47.95N 102.14W
04/30/2011 M1.5 INCH MOUNTRAIL ND PUBLIC

&&

$$

LHUBER

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MESO: Mesoscale Discussion 0674

ACUS11 KWNS 010226
SWOMCD
SPC MCD 010226
ARZ000-LAZ000-TXZ000-OKZ000-010330-

MESOSCALE DISCUSSION 0674
NWS STORM PREDICTION CENTER NORMAN OK
0926 PM CDT SAT APR 30 2011

AREAS AFFECTED...NERN TX...EXTREME SERN OK AND SWRN AR

CONCERNING...TORNADO WATCH 257...

VALID 010226Z - 010330Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 257 CONTINUES.

GREATEST SEVERE WEATHER POTENTIAL...INCLUDING A CONTINUED TORNADO
THREAT...EXISTS OVER THE ERN HALF OF WW 257. THE DIMINISHING SEVERE
WEATHER THREAT OVER THE NWRN HALF SHOULD CONTINUE AS A COLD FRONT
ADVANCES SSEWD. AND...IF THIS TREND PERSISTS IN THE SHORT
TERM...THEN THE NWRN HALF OF THIS WATCH COULD BE CANCELLED EARLY.

THE STRONGEST STORM WITHIN WW 257 WAS LOCATED OVER EXTREME NERN TX
/SRN MORRIS AND WRN CASS COUNTIES/ AND TRACKING ENEWD AT 25 KT. AIR
MASS ACROSS ERN TX TO THE ARKLATEX IS MOIST AND MODERATELY UNSTABLE.
THIS COMBINED WITH STRONG LOW LEVEL SHEAR PER 40-50 KT SSWLY LLJ
EXTENDING ACROSS THIS WATCH WITH BACKED SURFACE WINDS WILL CONTINUE
TO SUPPORT A TORNADO THREAT THIS EVENING AS ACTIVITY TRACKS TOWARD
SWRN AR.

MID EVENING SURFACE ANALYSES SHOWED A COLD FRONT MAKING A LITTLE
MORE PROGRESS SSEWD TO S AND E OF DALLAS. THE INITIAL STORMS THAT
FORMED OVER DALLAS AND COLLIN COUNTIES HAD WEAKENED...POSSIBLY BEING
UNDERCUT BY THE COLD FRONT AND/OR DUE TO INCREASING SURFACE BASED
INHIBITION GIVEN THE ONSET OF COOLING WITH THE LOSS OF DAYTIME
HEATING. THESE TRENDS ACROSS THE NWRN PORTION OF WW 257 SUGGEST
THESE COUNTIES MAY BE CANCELLED EARLY.

..PETERS.. 05/01/2011

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

ATTN...WFO...LZK...SHV...FWD...

LAT...LON 32309636 33079537 33739478 34359422 34179382 33909342
33399357 32989393 32389412 32289438 32059524 32009605
32309636

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KSHV [010227]: Preliminary Local Storm Report

NWUS54 KSHV 010227
LSRSHV

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
927 PM CDT SAT APR 30 2011

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

0925 PM TORNADO HUGHES SPRINGS 33.00N 94.63W
04/30/2011 CASS TX LAW ENFORCEMENT

STATE TROOPER REPORTS TORNADO ON THE GROUND AND GOLF BALL
SIZED HAIL

&&

$$

MHEMINGW

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KBIS [010211]: Preliminary Local Storm Report

NWUS53 KBIS 010211
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
911 PM CDT SAT APR 30 2011

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

0816 PM HEAVY SNOW TROTTERS 47.32N 103.92W
04/30/2011 M14.0 INCH GOLDEN VALLEY ND CO-OP OBSERVER

0911 PM SNOW PARSHALL 47.95N 102.14W
04/30/2011 M1.5 INCH MOUNTRAIL ND PUBLIC

&&

$$

LHUBER

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KBIS [010207]: Preliminary Local Storm Report

NWUS53 KBIS 010207
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
907 PM CDT SAT APR 30 2011

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

0904 PM SNOW MINOT 48.23N 101.30W
04/30/2011 E2.0 INCH WARD ND BROADCAST MEDIA

TOTAL SO FAR. STILL SNOWING.

&&

$$

JVINING

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KBIS [010206]: Preliminary Local Storm Report

NWUS53 KBIS 010206
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
906 PM CDT SAT APR 30 2011

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

0904 PM SNOW HARVEY 47.77N 99.94W
04/30/2011 E2.0 INCH WELLS ND BROADCAST MEDIA

2 INCHES SO FAR. STILL SNOWING.

&&

$$

JVINING

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KCRP [010205]: Preliminary Local Storm Report

NWUS54 KCRP 010205
LSRCRP

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
904 PM CDT SAT APR 30 2011

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

0104 PM WILDFIRE 14 S BENAVIDES 27.40N 98.41W
04/27/2011 DUVAL TX PARK/FOREST SRVC

ESTIMATED 1500 ACRE WILDFIRE ROUGHLY NEAR CR 716 AND FM
339. SEVERAL OUTBUILDINGS WERE LOST. 8 HOMES WERE
THREATENED BUT NONE WERE LOST.

&&

$$

HART

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KABR [010155]: Preliminary Local Storm Report...summary

NWUS53 KABR 010155
LSRABR

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE ABERDEEN SD
855 PM CDT SAT APR 30 2011

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

0959 AM NON-TSTM WND GST 13 N VIVIAN 44.12N 100.29W
04/30/2011 M40.00 MPH LYMAN SD MESONET

SUSTAINED WINDS OF 40 MPH. A PEAK GUST OF 58 MPH OCCURRED
AT 1059 AM, CDT.

1006 AM NON-TSTM WND GST 10 S BULLHEAD 45.62N 101.08W
04/30/2011 M66.00 MPH CORSON SD MESONET

SUSTAINED WINDS OF 49 MPH WITH GUSTS TO 66 MPH.

1041 AM NON-TSTM WND GST 6 E DANFORTH 44.25N 98.76W
04/30/2011 M40.00 MPH HAND SD MESONET

SUSTAINED WINDS OF 40 MPH WITH GUSTS TO 55 MPH.

1114 AM NON-TSTM WND GST PIERRE 44.37N 100.32W
04/30/2011 M58.00 MPH HUGHES SD ASOS

A PEAK WIND GUST SO FAR WAS 58 MPH.

1200 PM NON-TSTM WND GST GANN VALLEY 44.03N 98.99W
04/30/2011 E60.00 MPH BUFFALO SD LAW ENFORCEMENT

1200 PM NON-TSTM WND DMG 15 S PIERRE 44.16N 100.32W
04/30/2011 LYMAN SD EMERGENCY MNGR

SEMI IN MEDIAN

1200 PM NON-TSTM WND GST GETTYSBURG 45.01N 99.95W
04/30/2011 E60.00 MPH POTTER SD TRAINED SPOTTER

1200 PM NON-TSTM WND DMG 8 SSE FORT THOMPSON 43.94N 99.35W
04/30/2011 BUFFALO SD LAW ENFORCEMENT

SEMI TIPPED OVER ON HIGHWAY 50

0300 PM NON-TSTM WND GST MOUND CITY 45.73N 100.07W
04/30/2011 E60.00 MPH CAMPBELL SD LAW ENFORCEMENT

0330 PM NON-TSTM WND GST 6 E HAYES 44.37N 100.90W
04/30/2011 M59.00 MPH STANLEY SD CO-OP OBSERVER

LOCALIZED 1/4 MILE VISIBILITY FROM BLOWING SNOW

0330 PM NON-TSTM WND GST HAYES 44.37N 101.02W
04/30/2011 M69.00 MPH STANLEY SD CO-OP OBSERVER

0404 PM NON-TSTM WND DMG WATERTOWN 44.91N 97.17W
04/30/2011 CODINGTON SD TRAINED SPOTTER

OUTDOOR STORAGE UNIT BLOWN OVER, MUNICIPLE UTILITIES IS
OUT WORKING ON TRANSMISSION LINES

0500 PM NON-TSTM WND DMG N KIDDER 45.88N 97.71W
04/30/2011 MARSHALL SD CO-OP OBSERVER

HOUSE DOOR AND BARN DOORS BLOWN OFF

0530 PM NON-TSTM WND GST MURDO 43.89N 100.71W
04/30/2011 E60.00 MPH JONES SD EMERGENCY MNGR

0530 PM NON-TSTM WND DMG 9 W CLEAR LAKE 44.77N 96.86W
04/30/2011 DEUEL SD CO-OP OBSERVER

TRUCK AND RV FLIPPED ON INTERSTATE 29 NEAR EXIT 164

&&

$$

EWY

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KGGW [010152]: Preliminary Local Storm Report

NWUS55 KGGW 010152
LSRGGW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
751 PM MDT SAT APR 30 2011

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

0100 PM HEAVY SNOW SIDNEY 47.72N 104.16W
04/30/2011 E8.0 INCH RICHLAND MT EMERGENCY MNGR

BLIZZARD CONDITIONS WITH THE HEAVY WET SNOW WEIGHED DOWN
ON TREES AND POWER LINES. SEVERAL TREES WERE KNOCKED OVER
AS WELL AS BRANCHES WITH DIAMETERS OF 4 TO 6 INCHES.
SCATTERED POWER OUTAGES ALSO OCCURRED WITH THE STORM
SINCE LAST NIGHT.

&&

$$

TEDJ

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MESO: Mesoscale Discussion 0673

ACUS11 KWNS 010147
SWOMCD
SPC MCD 010147
ARZ000-010245-

MESOSCALE DISCUSSION 0673
NWS STORM PREDICTION CENTER NORMAN OK
0847 PM CDT SAT APR 30 2011

AREAS AFFECTED...CENTRAL AR

CONCERNING...TORNADO WATCH 258...

VALID 010147Z - 010245Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 258 CONTINUES.

RECENT TRENDS PER LIT WSR-88D INDICATED THE STORM OVER GARLAND
COUNTY AR WAS BECOMING SUPERCELLULAR /INFLOW NOTCH AND LOW LEVEL
ROTATION/ AND TRACKING ESE AT 25 KT. 00Z LIT SOUNDING SHOWED THE
CAP HAD WEAKENED SINCE 12Z WITH A RATHER MOIST BOUNDARY LAYER AS
CURRENT SURFACE OBSERVATIONS ACROSS CENTRAL/SRN AR INDICATED AN
INCREASE IN SURFACE DEWPOINTS TO THE UPPER 60S. THIS IS
CONTRIBUTING TO A MODERATELY UNSTABLE AIR MASS. MEANWHILE...
STRENGTHENING SWLY LLJ TO 40 KT PER LIT WSR-88D VWP DATA IS
RESULTING IN INCREASING LOW LEVEL SHEAR /SFC-1 KM SRH 420 M2 PER
S2/. THIS COMBINED WITH AFOREMENTIONED THERMODYNAMICS AND OBJECTIVE
ANALYSES SHOWING EFFECTIVE INFLOW IS SURFACE BASED PROVIDES CONCERN
THAT THIS STORM COULD PRODUCE A TORNADO.

OTHER STORMS DEVELOPING AND/OR MOVING INTO CENTRAL AR WILL NEED TO
BE MONITORED FOR SIMILAR TRENDS AND THREAT.

..PETERS.. 05/01/2011

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

ATTN...WFO...LZK...SHV...

LAT...LON 35259278 35459201 35309130 34219132 34109201 33889315
34219440 34649438 35109327 35259278

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KSHV [010147]: Preliminary Local Storm Report

NWUS54 KSHV 010147
LSRSHV

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
847 PM CDT SAT APR 30 2011

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

0810 PM TSTM WND DMG 11 NW GILMER 32.84N 95.08W
04/30/2011 UPSHUR TX TRAINED SPOTTER

METAL CARPORT WAS LIFTED OFF THE GROUND AND DAMAGED

&&

$$

MHEMINGW

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KABR [010145]: Preliminary Local Storm Report

NWUS53 KABR 010145
LSRABR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
845 PM CDT SAT APR 30 2011

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

1200 PM NON-TSTM WND DMG 8 SSE FORT THOMPSON 43.94N 99.35W
04/30/2011 BUFFALO SD LAW ENFORCEMENT

SEMI TIPPED OVER ON HIGHWAY 50

1200 PM NON-TSTM WND GST GANN VALLEY 44.03N 98.99W
04/30/2011 E60.00 MPH BUFFALO SD LAW ENFORCEMENT

&&

$$

EWY

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KSHV [010143]: Preliminary Local Storm Report

NWUS54 KSHV 010143
LSRSHV

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
843 PM CDT SAT APR 30 2011

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

0829 PM TSTM WND DMG 6 NW GILMER 32.79N 95.02W
04/30/2011 UPSHUR TX TRAINED SPOTTER

TREES DOWN AT CR 2088 AND COYOTE ROAD

&&

$$

MHEMINGW

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KFWD [010143]: Preliminary Local Storm Report

NWUS54 KFWD 010143
LSRFWD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
843 PM CDT SAT APR 30 2011

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

0800 PM HAIL MESQUITE 32.77N 96.60W
04/30/2011 M1.50 INCH DALLAS TX TRAINED SPOTTER

HALF DOLLAR HAIL IN MESQUITE (2 MILES SW OF MESQUITE
AIRPORT)

$$

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KUNR [010142]: Preliminary Local Storm Report

NWUS53 KUNR 010142
LSRUNR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
741 PM MDT SAT APR 30 2011

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

0330 PM NON-TSTM WND GST 19 ESE HERMOSA 43.73N 102.84W
04/30/2011 E60.00 MPH CUSTER SD TRAINED SPOTTER

0345 PM NON-TSTM WND GST 11 NNW PORCUPINE 43.38N 102.42W
04/30/2011 E60.00 MPH SHANNON SD CO-OP OBSERVER

&&

$$

MERICKSO

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KLZK [010140]: Preliminary Local Storm Report

NWUS54 KLZK 010140
LSRLZK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
840 PM CDT SAT APR 30 2011

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

0806 PM HAIL CLINTON 35.58N 92.45W
04/30/2011 E1.00 INCH VAN BUREN AR PUBLIC

&&

$$

227

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KPAH [010140]: Preliminary Local Storm Report

NWUS53 KPAH 010140
LSRPAH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PADUCAH KY
840 PM CDT SAT APR 30 2011

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

0840 PM HAIL SHARPE 36.97N 88.46W
04/30/2011 E1.00 INCH MARSHALL KY PUBLIC

&&

$$

CW

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KFWD [010139]: Preliminary Local Storm Report

NWUS54 KFWD 010139
LSRFWD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
838 PM CDT SAT APR 30 2011

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

0814 PM HAIL KLONDIKE 33.33N 95.77W
04/30/2011 E1.00 INCH DELTA TX LAW ENFORCEMENT

QUARTER SIZED HAIL NEAR KLONDIKE

$$

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KBYZ [010135]: Preliminary Local Storm Report

NWUS55 KBYZ 010135
LSRBYZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
735 PM MDT SAT APR 30 2011

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

0750 AM BLIZZARD BAKER 46.36N 104.27W
04/30/2011 FALLON MT ASOS

ZERO VISIBILITY REPORTED IN BAKER AS WINDS WERE GUSTING
TO 64 MPH. 6 HOURS OF SUSTAINED WINDS AT +40 MPH.
SNOWFALL OF 2 TO 5 INCHES REPORTED.

1253 PM NON-TSTM WND GST MILES CITY 46.41N 105.84W
04/30/2011 M59.00 MPH CUSTER MT ASOS

SEVERAL HOURS OF SUSTAINED WINDS OF 40 MPH.

0147 PM NON-TSTM WND GST 2 NW ROCK SPRINGS 46.83N 106.27W
04/30/2011 M60.00 MPH ROSEBUD MT DEPT OF HIGHWAYS

NUMEROUS SUSTAINED WINDS OF 40 MPH.

&&

$$

ACR

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KABR [010123]: Preliminary Local Storm Report

NWUS53 KABR 010123
LSRABR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
823 PM CDT SAT APR 30 2011

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

1200 PM NON-TSTM WND GST GETTYSBURG 45.01N 99.95W
04/30/2011 E60 MPH POTTER SD TRAINED SPOTTER

&&

$$

EWY

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KABR [010110]: Preliminary Local Storm Report

NWUS53 KABR 010110
LSRABR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
810 PM CDT SAT APR 30 2011

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

0530 PM NON-TSTM WND DMG 9 W CLEAR LAKE 44.77N 96.86W
04/30/2011 DEUEL SD CO-OP OBSERVER

TRUCK AND RV FLIPPED ON INTERSTATE 29 NEAR EXIT 164

&&

$$

EWY

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KTFX [010107]: Preliminary Local Storm Report...summary

NWUS55 KTFX 010107
LSRTFX

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE GREAT FALLS MT
706 PM MDT SAT APR 30 2011

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

0700 PM HEAVY SNOW 2 SW MARYSVILLE 46.73N 112.33W
04/29/2011 E10.0 INCH LEWIS AND CLARK MT PUBLIC

ESTIMATED 10 INCHES OF NEW SNOW TODAY. LOCATION IS
GREAT DIVIDE SKI AREA.

0752 PM SNOW 1 SW HELENA 46.59N 112.03W
04/29/2011 M2.0 INCH LEWIS AND CLARK MT TRAINED SPOTTER

2 INCHES OF WET SNOW THIS EVENING. STILL SNOWING HEAVY.

0800 PM SNOW 7 NE HELENA 46.67N 111.92W
04/29/2011 E4.0 INCH LEWIS AND CLARK MT PUBLIC

ESTIMATED 4 INCHES OF NEW SNOW IN THE HELENA VALLEY
THIS EVENING.

0800 PM HEAVY SNOW 13 ENE BELGRADE 45.87N 110.93W
04/29/2011 E13.0 INCH GALLATIN MT MESONET

ESTIMATED 13 INCHES OF NEW SNOW IN THE PAST 9 HOURS AT
THE SACAJAWEA SNOTEL. ELEVATION IS 6550 FEET.

0830 PM SNOW STANFORD 47.15N 110.22W
04/29/2011 E2.0 INCH JUDITH BASIN MT TRAINED SPOTTER

2 INCHES OF NEW SNOW IN THE PAST HOUR IN STANFORD.

0930 PM SNOW HELENA 46.60N 112.02W
04/29/2011 M2.5 INCH LEWIS AND CLARK MT BROADCAST MEDIA

2.5 INCHES OF NEW SNOW THIS EVENING. STILL SNOWING.

0945 PM HEAVY SNOW 21 W NEIHART 46.88N 111.16W
04/29/2011 E8.0 INCH MEAGHER MT CO-OP OBSERVER

ESTIMATED 8 INCHES OF NEW SNOW IN THE PAST 6 HOURS.

1000 PM SNOW 3 ENE HELENA 46.61N 111.96W
04/29/2011 M3.0 INCH LEWIS AND CLARK MT ASOS

3 INCHES OF NEW SNOW THIS EVENING AT THE HELENA
AIRPORT.

1000 PM HEAVY SNOW BASIN 46.27N 112.27W
04/29/2011 M11.0 INCH JEFFERSON MT TRAINED SPOTTER

SNOWFALL OF 11 INCHES FROM THURSDAY NIGHT INTO FRIDAY
NIGHT AT BASIN... MT

1024 AM SNOW 18 NW LAKEVIEW 44.79N 112.06W
04/30/2011 M10.0 INCH MADISON MT MESONET

DIVIDE SNOTEL MEASURED 10 INCHES OF SNOWFALL FROM 1300
MST TO 0100 MST. ELEVATION 7800 FEET.

0228 PM HAIL 1 SE BLACK EAGLE 47.51N 111.26W
04/30/2011 E0.25 INCH CASCADE MT TRAINED SPOTTER

HAIL UP TO PEA SIZE OCCURRING WITH A THUNDERSTORM ON
THE EAST END OF GREAT FALLS.

&&

$$

EMANUEL

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 010053
SWODY1
SPC AC 010051

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0751 PM CDT SAT APR 30 2011

VALID 010100Z - 011200Z

...THERE IS A SLGT RISK OF SVR TSTMS FROM THE MID-SOUTH TO THE SRN
PLAINS...

...MID-SOUTH...
COMBINATION OF WEAK ASCENT IN ENTRANCE REGION OF AN EJECTING
JET-STREAK...DEEPENING MOIST BOUNDARY LAYER AND MODEST HEATING HAVE
CONTRIBUTED TO TSTM DEVELOPMENT LATE AFTN OVER CNTRL/NERN AR. 00Z
LZK SOUNDING EXHIBITED MLCAPE AROUND 2000 J/KG AND EFFECTIVE SHEAR
50+ KTS...MORE THAN SUFFICIENT FOR ORGANIZED STORMS INCLUDING BRIEF
SUPERCELLS AND CLUSTERS/BANDS. NRN STORMS WILL DEVELOP ENE INTO THE
LOWER OH VLY AND PROBABLY WEAKEN WITH EWD EXTENT GIVEN SLIGHTLY MORE
STABLE ENVIRONMENT. FARTHER S...COMPARATIVELY MORE ROBUST
INSTABILITY AND AMPLE 0-1KM SHEAR OF 30+ KTS WILL YIELD A FEW
STRONG-SEVERE STORMS CAPABLE OF LARGE HAIL...DMGG WIND GUSTS...AND
PERHAPS A COUPLE OF TORNADOES.

...NRN TX...
SCATTERED DISCRETE STORM DEVELOPMENT...INCLUDING
SUPERCELLS...OCCURRED ALONG A COLD FRONT LATE THIS AFTERNOON OVER
NCNTRL TX AMID STRONG BOUNDARY LAYER HEATING AND STEEP MID-LEVEL
LAPSE RATES. SOUNDING AND VWP DATA INDICATE A WEAK LOW-LEVEL WIND
FIELD...BUT MAGNITUDE OF MID-TROP LAPSE RATES AND 40-50 KTS OF
EFFECTIVE SHEAR ARE COMPENSATING TO SUPPORT ROTATING STORMS. AS
STORMS CONTINUE ENE OFF THE FRONT AND INTO AN ENVIRONMENT
CHARACTERIZED BY A COMPARATIVELY RICHER MOISTURE AND STRONGER
LOW-LEVEL SHEAR OVER NE TX...THREATS FOR VERY LARGE HAIL AND A
COUPLE OF TORNADOES WILL EXIST THROUGH MID-EVENING.

SOME OF THESE STORMS WILL EVOLVE ENE INTO THE MID-SOUTH OVERNIGHT
WITH A CONTINUED THREAT FOR AT LEAST HAIL AND HIGH WINDS.
BUT...EXPECT ACTIVITY ALONG SRN END OF THE SLIGHT RISK AREA TO
DIMINISH AND/OR EVOLVE FARTHER N OF THE COLD FRONT AS ELEVATED BANDS
OF STORMS ALONG THE RED RIVER OVERNIGHT. A FEW OF THESE STORMS MAY
CONTAIN LARGE HAIL.

..RACY.. 05/01/2011

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MESO: Mesoscale Discussion 0672

ACUS11 KWNS 010050
SWOMCD
SPC MCD 010049
KYZ000-ILZ000-TNZ000-MOZ000-ARZ000-010145-

MESOSCALE DISCUSSION 0672
NWS STORM PREDICTION CENTER NORMAN OK
0749 PM CDT SAT APR 30 2011

AREAS AFFECTED...NERN AR...SERN MO...AND EXTREME PARTS OF NWRN
TN...WRN KY AND SRN IL

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 010049Z - 010145Z

A SEVERE TSTM WATCH IS POSSIBLE TO THE NORTHEAST OF WW 258...
ESPECIALLY IF RADAR TRENDS SUGGEST COVERAGE AND INTENSITY OF STORMS
MOVING NEWD FROM WW 258 WILL PERSIST FARTHER DOWNSTREAM.
PROBABILITY OF WATCH ISSUANCE IS 40 PERCENT.

00Z SURFACE ANALYSIS INDICATED LITTLE MOVEMENT OF THE COLD FRONT
SINCE 21Z...WITH THIS BOUNDARY EXTENDING FROM ERN IA SSWWD THROUGH
CENTRAL MO...ERN OK AND INTO CENTRAL TX. ZONE OF LOW LEVEL
CONVERGENCE WAS LOCATED AHEAD OF THE COLD FRONT FROM CENTRAL INTO
NERN AR AND COMBINED WITH A WEAK MIDLEVEL IMPULSE OVER THE ARKLATEX
HAS SUPPORTED TSTM DEVELOPMENT THUS FAR OVER WRN-NERN AR.
MEANWHILE...A SURFACE TROUGH EXTENDED SSEWD FROM NERN AR TO SRN MS
AND DELINEATED HIGHER MOISTURE VALUES TO ITS WEST OVER AR/LA...AND
DRIER AIR TO THE EAST.

STORMS TRACKING AND OR DEVELOPING NEWD OF WW 258 WILL BECOME
INCREASINGLY ELEVATED ATOP A MORE STABLE BOUNDARY LAYER...ATTRIBUTED
TO THE DRIER AIR EAST OF THE AFOREMENTIONED SURFACE TROUGH.
ACTIVITY OVER NERN AR WILL BE CLOSER TO STRONGER INSTABILITY AND
EFFECTIVE BULK SHEAR FOR A FEW STORMS TO MAINTAIN INTENSITY AND
ORGANIZATION. THUS...ISOLATED HAIL WILL BE THE PRIMARY THREAT WITH
THE ELEVATED ACTIVITY. HOWEVER...AS STORMS DEVELOP AND/OR MOVE
FARTHER NEWD AWAY FROM THE BETTER INSTABILITY...THE OVERALL SEVERE
WEATHER THREAT IS EXPECTED TO DECREASE.

..PETERS.. 05/01/2011

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

ATTN...WFO...PAH...MEG...LSX...LZK...SGF...

LAT...LON 37088836 36178891 35899013 35899166 35749226 35809260
36499142 37399027 37618907 37588834 37088836

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KFWD [010047]: Preliminary Local Storm Report

NWUS54 KFWD 010047
LSRFWD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
747 PM CDT SAT APR 30 2011

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

0746 PM HAIL LADONIA 33.42N 95.97W
04/30/2011 E1.00 INCH FANNIN TX AMATEUR RADIO

QUARTER SIZED HAIL IN LADONIA

$$

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KFWD [010040]: Preliminary Local Storm Report

NWUS54 KFWD 010040
LSRFWD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
740 PM CDT SAT APR 30 2011

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

0738 PM HAIL WOLFE CITY 33.37N 96.08W
04/30/2011 E1.00 INCH HUNT TX TRAINED SPOTTER

QUARTER SIZED HAIL COVERING THE GROUND IN WOLFE CITY

$$

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KFWD [010039]: Preliminary Local Storm Report

NWUS54 KFWD 010039
LSRFWD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
739 PM CDT SAT APR 30 2011

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

0720 PM HAIL FORNEY 32.75N 96.47W
04/30/2011 E1.00 INCH KAUFMAN TX PUBLIC

QUARTER HAIL REPORTED BY THE PUBLIC IN FORNEY.

$$

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KFWD [010034]: Preliminary Local Storm Report

NWUS54 KFWD 010034
LSRFWD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
733 PM CDT SAT APR 30 2011

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

0730 PM HAIL WOLFE CITY 33.37N 96.08W
04/30/2011 E0.88 INCH HUNT TX TRAINED SPOTTER

NICKEL SIZED HAIL IN WOLFE CITY

$$

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KBIS [010025]: Preliminary Local Storm Report

NWUS53 KBIS 010025
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
725 PM CDT SAT APR 30 2011

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

0530 PM HEAVY SNOW WATFORD CITY 47.80N 103.28W
04/30/2011 E6.0 INCH MCKENZIE ND EMERGENCY MNGR

BLIZZARD CONDITIONS WITH 60 TO 70 MPH WINDS. POWER
OUTAGES OVER PARTS OF MCKENZIE COUNTY. SEMI TRUCKS
JACKKNIFED ON HIGHWAY 22 NORTH OF KILLDEER.

&&

$$

JVINING

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KABR [010017]: Preliminary Local Storm Report

NWUS53 KABR 010017
LSRABR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
717 PM CDT SAT APR 30 2011

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

0500 PM NON-TSTM WND DMG N KIDDER 45.88N 97.71W
04/30/2011 MARSHALL SD CO-OP OBSERVER

HOUSE DOOR AND BARN DOORS BLOWN OFF

&&

$$

EWY

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KFWD [010014]: Preliminary Local Storm Report

NWUS54 KFWD 010014
LSRFWD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
714 PM CDT SAT APR 30 2011

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

0712 PM HAIL MESQUITE 32.77N 96.60W
04/30/2011 E1.00 INCH DALLAS TX AMATEUR RADIO

HAIL TO THE SIZE QUARTERS IN THE CITY OF MESQUITE

$$

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KUNR [010004]: Preliminary Local Storm Report

NWUS53 KUNR 010004
LSRUNR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
604 PM MDT SAT APR 30 2011

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

0909 AM NON-TSTM WND GST 9 N BOX ELDER 44.25N 103.07W
04/30/2011 M69.00 MPH MEADE SD NWS EMPLOYEE

1209 PM NON-TSTM WND GST S DOWNTOWN STURGIS 44.41N 103.51W
04/30/2011 M71.00 MPH MEADE SD TRAINED SPOTTER

0311 PM NON-TSTM WND GST 9 N BOX ELDER 44.25N 103.07W
04/30/2011 M71.00 MPH MEADE SD NWS EMPLOYEE

&&

$$

MERICKSO

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KFWD [010001]: Preliminary Local Storm Report

NWUS54 KFWD 010001
LSRFWD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
701 PM CDT SAT APR 30 2011

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

0657 PM HAIL MESQUITE 32.77N 96.60W
04/30/2011 E1.75 INCH DALLAS TX TRAINED SPOTTER

GOLF BALL SIZED HAIL JUST EAST OF I635 ALONG US80

$$

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KFWD [302355]: Preliminary Local Storm Report

NWUS54 KFWD 302355
LSRFWD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
654 PM CDT SAT APR 30 2011

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

0648 PM HAIL 2 WNW MESQUITE 32.78N 96.63W
04/30/2011 E0.88 INCH DALLAS TX TRAINED SPOTTER

NICKEL HAIL 2 WNW OF MESQUITE.

$$

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KABR [302354]: Preliminary Local Storm Report

NWUS53 KABR 302354
LSRABR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
654 PM CDT SAT APR 30 2011

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

0300 PM NON-TSTM WND GST MOUND CITY 45.73N 100.07W
04/30/2011 E60 MPH CAMPBELL SD LAW ENFORCEMENT

&&

$$

EWY

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WATCHES: Tornado Watch Number 258

WWUS20 KWNS 302351
SEL8
SPC WW 302351
ARZ000-010700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 258
NWS STORM PREDICTION CENTER NORMAN OK
650 PM CDT SAT APR 30 2011

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

ARKANSAS

EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 650 PM
UNTIL 200 AM CDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 40 MILES SOUTH OF FORT SMITH
ARKANSAS TO 30 MILES SOUTH OF JONESBORO ARKANSAS. FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU8).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

OTHER WATCH INFORMATION...CONTINUE...WW 257...

DISCUSSION...TSTMS HAVE RECENTLY INCREASED IN COVERAGE AND INTENSITY
FROM NE OF BVX TO W OF HOT...LIKELY IN RESPONSE TO A LOW-AMPLITUDE
IMPULSE LIFTING NEWD FROM THE ARKLATEX. THIS INITIAL ACTIVITY
APPEARS TO BE AT LEAST SLIGHTLY ELEVATED. HOWEVER...GIVEN THE WARM
AND MOIST BOUNDARY LAYER IN PLACE NAMELY ALONG AND S OF THE I-40
CORRIDOR...POTENTIAL WILL EXIST FOR STORMS TO BECOME SURFACE-BASED
WITHIN A KINEMATIC ENVIRONMENT CHARACTERIZED BY 0-1 KM SRH OF
250-300 M2/S2 PER LITTLE ROCK VWP. WHILE LARGE HAIL WILL BE THE
PRIMARY HAZARD...TORNADOES WILL BE POSSIBLE WITH ANY SUPERCELLS THAT
CAN BECOME SURFACE-BASED.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 24030.

...MEAD

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KABR [302345]: Preliminary Local Storm Report

NWUS53 KABR 302345
LSRABR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
645 PM CDT SAT APR 30 2011

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

1200 PM NON-TSTM WND DMG 15 S PIERRE 44.16N 100.32W
04/30/2011 LYMAN SD EMERGENCY MNGR

SEMI IN MEDIAN

0330 PM NON-TSTM WND GST 6 E HAYES 44.37N 100.90W
04/30/2011 M59.00 MPH STANLEY SD CO-OP OBSERVER

LOCALIZED 1/4 MILE VISIBILITY FROM BLOWING SNOW

0330 PM NON-TSTM WND GST HAYES 44.37N 101.02W
04/30/2011 M69.00 MPH STANLEY SD CO-OP OBSERVER

0530 PM NON-TSTM WND GST MURDO 43.89N 100.71W
04/30/2011 E60.00 MPH JONES SD EMERGENCY MNGR

&&

$$

EWY

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MESO: Mesoscale Discussion 0671

ACUS11 KWNS 302332
SWOMCD
SPC MCD 302331
TNZ000-ARZ000-MSZ000-MOZ000-010000-

MESOSCALE DISCUSSION 0671
NWS STORM PREDICTION CENTER NORMAN OK
0631 PM CDT SAT APR 30 2011

AREAS AFFECTED...CENTRAL AND NRN AR

CONCERNING...SEVERE POTENTIAL...WATCH LIKELY

VALID 302331Z - 010000Z

MUCH OF CENTRAL AND NRN AR IS BEING MONITORED FOR A SEVERE WEATHER
WATCH ISSUANCE EARLY THIS EVENING. SPC COORDINATION WITH AFFECTED
WFOS MAY BE NEEDED SOON...WITH PROBABILITY OF A WATCH ISSUANCE BY
00Z IS 80 PERCENT.

REGIONAL RADAR IMAGERY AND LIGHTNING DATA SHOWED A CONTINUED
INCREASE IN TSTM COVERAGE AND INTENSITY ACROSS WRN TO NERN AR DURING
THE LAST 1-2 HOURS. SLY WINDS INTO THIS REGION ARE RESULTING IN
SURFACE DEWPOINTS RISING THROUGH THE 60S. THIS COUPLED WITH
MIDLEVEL LAPSE RATES OF 7-7.5 C/KM IS SUPPORTING MODERATE
INSTABILITY /MLCAPE 1000-1500 J PER KG/ DEVELOPING NEWD.

WHILE MUCH OF THIS REGION HAS BEEN CLOUDY THROUGH THE DAY AND
INITIAL ACTIVITY LIKELY ROOTED ABOVE THE SURFACE...FORECAST
SOUNDINGS SUGGEST THE WARM/MOIST BOUNDARY LAYER MAY BECOME REALIZED
AS THE CAP BASED AROUND 700 MB IS REDUCED. THIS PROCESS MAY BE
UNDERWAY NOW...BASED ON THE INCREASE IN ACTIVITY AND IS LIKELY
SUPPORTED BY A WEAK MIDLEVEL IMPULSE TRACKING NEWD ACROSS NERN TX.
EFFECTIVE BULK SHEAR TO AROUND 50 KT WILL SUPPORT ORGANIZED STORMS
AND AS THE CAP WEAKENS...STORMS SHOULD BECOME SURFACE BASED. THIS
WILL RESULT IN AN INCREASED TORNADO POTENTIAL...IN ADDITION TO THE
THREAT FOR HAIL AND DAMAGING WINDS.

..PETERS.. 04/30/2011

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

ATTN...WFO...MEG...LZK...

LAT...LON 34969029 34409185 34379419 35499347 36399262 36499007
35739002 34969029

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KJAN [302318]: Preliminary Local Storm Report...corrected

NWUS54 KJAN 302318
LSRJAN

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE JACKSON MS
617 PM CDT SAT APR 30 2011

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

0124 AM TORNADO SIDON 33.41N 90.21W
04/27/2011 F1 LEFLORE MS NWS STORM SURVEY

A 3 MILE PATH WAS FOUND FROM SIDON TO 3 NE OF SIDON. A
COUPLE DOZEN TREES WERE SNAPPED AND UPROOTED. TWO WERE
DOWN ON HOUSES...ONE ON A MOBILE HOME AND ANOTHER ON A
CAR. MAX WINDS WERE 90 MPH...100 YDS WIDE.

&&

$$

CME

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KOTX [302309]: Preliminary Local Storm Report

NWUS56 KOTX 302309
LSROTX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
409 PM PDT SAT APR 30 2011

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

0350 PM HAIL 12 E COLVILLE 48.54N 117.63W
04/30/2011 E0.88 INCH STEVENS WA TRAINED SPOTTER

SPOTTER ESTIMATED NICKEL TO QUARTER SIZE HAIL WHILE
DRIVING THROUGH THE THUNDERSTORM.

&&

$$

VAN HORN

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KFSD [302307]: Preliminary Local Storm Report

NWUS53 KFSD 302307
LSRFSD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
607 PM CDT SAT APR 30 2011

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

0200 PM NON-TSTM WND GST CHAMBERLAIN 43.81N 99.32W
04/30/2011 M63.00 MPH BRULE SD OFFICIAL NWS OBS

MEASURED ON K9V9 ASOS EQUIPMENT

0338 PM NON-TSTM WND GST CHAMBERLAIN 43.81N 99.32W
04/30/2011 M60.00 MPH BRULE SD OFFICIAL NWS OBS

MEASURED ON K9V9 ASOS EQUIPMENT

0514 PM NON-TSTM WND GST CHAMBERLAIN 43.81N 99.32W
04/30/2011 M59.00 MPH BRULE SD OFFICIAL NWS OBS

MEASURED ON K9V9 ASOS EQUIPMENT

&&

$$

JH

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KLWX [302304]: Preliminary Local Storm Report

NWUS51 KLWX 302304
LSRLWX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
704 PM EDT SAT APR 30 2011

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

1125 PM TORNADO RESTON 38.95N 77.34W
04/27/2011 FAIRFAX VA NWS STORM SURVEY

RELATIVELY CONTINUOUS TREE DAMAGE WAS NOTED ALONG A 1.1
MILE TRACK FROM SUNSET HILLS ROAD TO WIEHLE AVENUE NEAR
NORTH SHORE DRIVE AND FAIRWAY DRIVE. THIS TORNADO
PRELIMINARILY HAS BEEN RATED EF-0 PENDING REVIEW OF
AVAILABLE DATA AND SURVEY DETAILS.

&&

EVENT NUMBER LWX1100598

$$

KRAMAR

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KJAN [302300]: Preliminary Local Storm Report

NWUS54 KJAN 302300
LSRJAN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
559 PM CDT SAT APR 30 2011

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

0112 AM TORNADO 2 N YAZOO CITY 32.89N 90.41W
04/27/2011 F1 YAZOO MS NWS STORM SURVEY

THIS TORNADO CAUSED A PATH OF EXTENSIVE DOWNED TREES
ALONG A PATH FROM US HWY 49W N OF YAZOO CITY ALONG THE
WEST SIDE OF HWY 49E TO JUST NW OF THE EDEN COMMUNITY.
ONE HOME ON MONEY SUNK RD HAD ROOF DMG AND A PORCH WAS
DAMAGED TO ANOTHER HOME. IT CROSSED INTO HOLMES CO AT HWY
49E AND CONTINUED TO SNAP AND UPROOT TREES AND DISSIPATED
IN THE WILDLIFE REFUGE. PATH LENGTH 10 MI...MAX WINDS 100
MPH...WIDTH 250 YDS...ENDED AT 125 AM.

&&

$$

CME

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WATCHES: Tornado Watch Number 257

WWUS20 KWNS 302259
SEL7
SPC WW 302259
ARZ000-OKZ000-TXZ000-010700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 257
NWS STORM PREDICTION CENTER NORMAN OK
555 PM CDT SAT APR 30 2011

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

SOUTHWEST ARKANSAS
SOUTHEAST OKLAHOMA
NORTHEAST TEXAS

EFFECTIVE THIS SATURDAY AFTERNOON AND SUNDAY MORNING FROM 555 PM
UNTIL 200 AM CDT.

TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
MILES EAST AND WEST OF A LINE FROM 10 MILES SOUTHWEST OF TYLER
TEXAS TO 25 MILES NORTH NORTHWEST OF DE QUEEN ARKANSAS. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU7).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

DISCUSSION...INCIPIENT STORM DEVELOPMENT IS UNDERWAY ALONG COLD
FRONT OVER THE DALLAS-FT. WORTH AREA WITHIN A STRONGLY UNSTABLE AIR
MASS WITH MLCAPE VALUES OF 3000 J/KG. KINEMATIC ENVIRONMENT INVOF
COLD FRONT IS CHARACTERIZED BY A WEAK LOW-LEVEL WIND FIELD BUT 40-50
KT EFFECTIVE BULK SHEAR. HOWEVER...AS STORMS MATURE...THEY WILL
ENCOUNTER STRONGER LOW-LEVEL SHEAR AND HIGHER BOUNDARY LAYER
MOISTURE CONTENT WITH EWD EXTENT. AS SUCH...INITIAL HAZARDS WILL BE
LARGE HAIL AND LOCALLY DAMAGING WINDS WITH AN INCREASED TORNADO
THREAT AFTER 01/00Z.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 24030.

...MEAD

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KLWX [302259]: Preliminary Local Storm Report...corrected

NWUS51 KLWX 302259
LSRLWX

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
658 PM EDT SAT APR 30 2011

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

1047 PM TORNADO 2 S NOKESVILLE 38.67N 77.58W
04/27/2011 PRINCE WILLIAM VA NWS STORM SURVEY

CORRECTED START LOCATION OF TRACK AFTER DAMAGE SURVEY
TODAY. TORNADO WAS RATED EF-1. ADDITIONAL DAMAGE
INCLUDES NUMEROUS SNAPPED AND UPROOTED TREES...SIDING
AND SHINGLE REMOVAL...DETACHED GARAGE DOOR FAILURE AND
DESTRUCTION OF SEVERAL HORSE RUN-INS. STRUCTURAL DAMAGE
WAS NOTED IN RETAIL SHOPPING CENTER.

&&

CORRECTED EVENT TIME...LOCATION...REMARKS...SOURCE

EVENT NUMBER LWX1100531

$$

KRAMAR

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