Severe Thunderstorm Watch 139

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 139
NWS STORM PREDICTION CENTER NORMAN OK
645 PM CDT THU MAR 27 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
PARTS OF CENTRAL AND SOUTHWESTERN ILLINOIS
PARTS OF EAST CENTRAL AND SOUTHEASTERN MISSOURI
EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 645 PM
UNTIL 100 AM CDT.
HAIL TO 2.5 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 60
STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHWEST OF
MATTOON ILLINOIS TO 15 MILES SOUTH OF WEST PLAINS MISSOURI. FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU9).
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 138
...
DISCUSSION...SEVERE THUNDERSTORMS ONGOING ACROSS CENTRAL/SWRN MO
AHEAD OF COLD FRONT WILL CONTINUE EWD UNDER STRONG UPPER FLOW.
ADDITIONALLY SEVERE THUNDERSTORMS HAVE DEVELOPED NORTH OF FRONTAL
ZONE ACROSS STL AREA AND WILL MAINTAIN A THREAT OF AT LEAST LARGE
HAIL INTO CENTRAL IL. ALONG AND TO THE SOUTH OF THE FRONT...STORMS
WILL HAVE GREATER POTENTIAL OF DAMAGING WINDS AND THEY EVOLVE MORE
INTO SHORT LINES/BOWS.
AVIATION...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 25035.
...HALES