

000 

WWUS20 KWNS 030834

SEL1

SPC WW 030834

ILZ000-INZ000-MOZ000-031600-



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

