Severe Thunderstorm Watch #272

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 272
NWS STORM PREDICTION CENTER NORMAN OK
1130 PM CDT MON MAY 1 2006

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

SOUTHERN ILLINOIS
SOUTHWESTERN INDIANA
WESTERN KENTUCKY
SOUTHEASTERN MISSOURI

EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 1130 PM
UNTIL 500 AM CDT.

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

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 95
STATUTE MILES EAST AND WEST OF A LINE FROM 5 MILES EAST OF SALEM
ILLINOIS TO 30 MILES EAST SOUTHEAST OF POPLAR BLUFF MISSOURI.
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 271...

DISCUSSION...THUNDERSTORMS WILL CONTINUE TO DEVELOP AND SPREAD EWD
WITHIN MODERATE INSTABILITY AND MODEST CAPPING IN PLACE ACROSS WW
OVERNIGHT. SHEAR REMAINS QUITE STRONG WITH EFFECTIVE SHEAR IN
EXCESS OF 50 KT SUPPORTING SUPERCELLS. DUE TO STRENGTHENING
CAP...APPEARS PRIMARY THREATS WILL TRANSITION TO LARGE HAIL AND
ISOLATED DAMAGING WINDS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 26035.


...EVANS