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082 

WWUS20 KWNS 080317

SEL2

SPC WW 080317

ILZ000-KYZ000-MOZ000-081100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 262

NWS STORM PREDICTION CENTER NORMAN OK

1015 PM CDT THU MAY 7 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHERN ILLINOIS

       WESTERN KENTUCKY

       CENTRAL TO SOUTHEAST MISSOURI



EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 1015 PM

UNTIL 600 AM CDT.



HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 60

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 80 MILES WEST

SOUTHWEST OF JEFFERSON CITY MISSOURI TO 35 MILES NORTHEAST OF

PADUCAH KENTUCKY.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 259...WW 260...WW 261...



DISCUSSION...SCTD TSTMS/POSSIBLE MARGINAL SUPERCELLS EXPECTED TO

PERSIST OVERNIGHT ALONG AXIS OF CONFLUENT AND INCREASINGLY MOIST

WSWLY LLJ.  ACTIVITY WILL BE LOCATED ON SRN FRINGE OF MODERATE ZONAL

MID LVL JET.  ASSOCIATED DEEP SHEAR AND WAA MAY BOOST THREAT FOR SVR

HAIL AND POSSIBLY LOCALLY DMGG WIND WITH ANY SUSTAINED STORMS.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 28035.





...CORFIDI

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