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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 129

NWS STORM PREDICTION CENTER NORMAN OK

1015 PM CDT SAT MAY 1 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHERN ILLINOIS

       PARTS OF CENTRAL AND SOUTHERN INDIANA

       WESTERN KENTUCKY

       SOUTHEASTERN AND EAST-CENTRAL MISSOURI



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 1015 PM

UNTIL 500 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 135 STATUTE

MILES EAST AND WEST OF A LINE FROM 5 MILES EAST NORTHEAST OF

LAFAYETTE INDIANA TO 45 MILES SOUTH SOUTHWEST OF PADUCAH

KENTUCKY.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 127...WW 128...



DISCUSSION...INCREASING SSWLY LOW LEVEL WINDS WILL CONTINUE TO

ADVECT MOISTURE NWD INTO THE LOWER OH VALLEY LATE THIS EVENING AND

OVERNIGHT AIDING IN FURTHER AIR MASS DESTABILIZATION.  STRONG DEEP

LAYER SHEAR AND INCREASING LOW LEVEL SHEAR WILL SUPPORT SUPERCELLS

WITH AN ATTENDANT THREAT FOR ISOLATED TORNADOES...HAIL AND DAMAGING

WINDS.



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 23035.





...PETERS/THOMPSON

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