URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 46
NWS STORM PREDICTION CENTER NORMAN OK
840 PM CDT SUN APR 4 2010
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
PARTS OF WEST CENTRAL ILLINOIS
LARGE PART OF SOUTHERN EAST CENTRAL MISSOURI
EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 840 PM UNTIL
200 AM CDT.
HAIL TO 2 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 50
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES EAST OF
ALTON ILLINOIS TO 15 MILES NORTH NORTHWEST OF JOPLIN MISSOURI.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU6).
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 45...
DISCUSSION...MOISTURE AND INSTABILITY HAVE INCREASED ACROSS SRN MO
THIS EVENING AHEAD OF DEVELOPING LINE OF STRONG/SEVERE
THUNDERSTORMS. WITH 50KTK OF SHEAR AND STEEP MID LEVEL LAPSE RATES
COUPLED WITH MLCAPES AOA 1500 J/KG...POTENTIAL FOR LARGE HAIL AND
WIND DAMAGE WILL CONTINUE TO BE ASSOCIATED WITH THE LINE AS IT
MOVES/DEVELOPS E/SEWD,
AVIATION...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 450. MEAN STORM
MOTION VECTOR 25035.
...HALES
