Tornado Watch 431

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 431
NWS STORM PREDICTION CENTER NORMAN OK
330 AM CDT TUE JUN 3 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
CENTRAL AND SOUTHERN ILLINOIS
WESTERN INDIANA
EASTERN MISSOURI
EFFECTIVE THIS TUESDAY MORNING FROM 330 AM UNTIL 1100 AM CDT.
TORNADOES...HAIL TO 1.5 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 70 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 40 MILES EAST SOUTHEAST OF
TERRE HAUTE INDIANA TO 50 MILES WEST OF QUINCY ILLINOIS. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU1).
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 427
...
WW 428
...
WW
429
...
WW 430
...
DISCUSSION...CLUSTERS OF STORMS/SUPERCELLS EXPECTED TO PERSIST ALONG
SLIGHTLY ELEVATED WARM FRONTAL SEGMENT ORIENTED WNW-ESE ACROSS WW.
BOUNDARY SHOULD SHIFT SLIGHTLY NE WITH TIME...WHILE AIR MASS
RECOVERY CONTINUES TO ITS S AND W. LOW-LVL WINDS WILL NOT BE
STRONG. BUT SIZABLE LOW-LVL DIRECTIONAL COMPONENT...NEAR-SATURATED
LOW-LVL ENVIRONMENT...AND LIKELIHOOD FOR SEMI-DISCRETE STORM
STRUCTURES TO MOVE TO THE RIGHT OF THE MEAN FLOW SUGGEST POSSIBILITY
FOR TORNADOES ...IN ADDITION TO LOCALLY DMGG WIND AND SVR HAIL.
AVIATION...TORNADOES AND 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 28030.
...CORFIDI