

980 

WWUS20 KWNS 082132

SEL3

SPC WW 082132

ILZ000-MOZ000-090300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 353

NWS STORM PREDICTION CENTER NORMAN OK

435 PM CDT MON JUN 8 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHERN ILLINOIS

       SOUTHEAST AND SOUTH CENTRAL MISSOURI



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 435 PM UNTIL

1000 PM 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 55

STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTHEAST OF

MATTOON ILLINOIS TO 30 MILES SOUTHEAST OF WEST PLAINS MISSOURI.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 350...WW 351...WW 352...



DISCUSSION...THUNDERSTORMS ARE RAPIDLY DEVELOPING ALONG A SURFACE

BOUNDARY FROM CENTRAL IL INTO SOUTHERN MO.  EXTREME INSTABILITY AND

FAVORABLE EFFECTIVE SHEAR AHEAD OF THE ACTIVITY WILL PROMOTE

ORGANIZED AND ISOLATED SUPERCELL STORMS CAPABLE OF LARGE HAIL AND

DAMAGING WINDS.



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 550. MEAN STORM

MOTION VECTOR 27030.





...HART

