909 
WWUS20 KWNS 281910
SEL5  
SPC WW 281910
ILZ000-WIZ000-LMZ000-290100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 435 
NWS STORM PREDICTION CENTER NORMAN OK 
210 PM CDT WED MAY 28 2003

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 

       NORTHERN AND CENTRAL ILLINOIS
       SOUTHERN WISCONSIN
       LAKE MICHIGAN

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 210 PM UNTIL
800 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 ALONG AND 55 STATUTE MILES
EITHER SIDE OF A LINE FROM 40 MILES WEST NORTHWEST OF MILWAUKEE
WISCONSIN TO 15 MILES WEST SOUTHWEST OF MATTOON ILLINOIS.

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.

DISCUSSION...THUNDERSTORMS CONTINUE TO DEVELOP AND INTENSIFY FROM
SRN WI INTO NRN IL ALONG COLD FRONT MOVING SEWD ACROSS THE REGION. 
CONVECTION IS DEVELOPING WITHIN LEFT EXIT REGION OF MID/UPPER LEVEL
JET STREAK DIGGING SEWD ACROSS THE MIDDLE MS VALLEY.  AIR MASS IS
RAPIDLY DESTABILIZING IMMEDIATELY AHEAD OF THE COLD FRONT WHERE
CLOUDS HAVE CLEARED AND STRONG AFTERNOON HEATING IS OCCURRING.THIS
IS RESULTING IN UNSTABLE ENVIRONMENT WITH MLCAPE OF 1000-1500 J/KG. 
STORMS ARE EXPECTED TO SPREAD SEWD THROUGH THE AFTERNOON.

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 400. MEAN STORM
MOTION VECTOR 30025.

...WEISS

;431,0873 392,0873 392,0893 430,0894; 

959 
WWUS20 KWNS 281910
SEL5  
SPC WW 281910
ILZ000-WIZ000-LMZ000-290100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 435 
NWS STORM PREDICTION CENTER NORMAN OK 
210 PM CDT WED MAY 28 2003

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 

       NORTHERN AND CENTRAL ILLINOIS
       SOUTHERN WISCONSIN
       LAKE MICHIGAN

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 210 PM UNTIL
800 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 ALONG AND 55 STATUTE MILES
EITHER SIDE OF A LINE FROM 40 MILES WEST NORTHWEST OF MILWAUKEE
WISCONSIN TO 15 MILES WEST SOUTHWEST OF MATTOON ILLINOIS.

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.

DISCUSSION...THUNDERSTORMS CONTINUE TO DEVELOP AND INTENSIFY FROM
SRN WI INTO NRN IL ALONG COLD FRONT MOVING SEWD ACROSS THE REGION. 
CONVECTION IS DEVELOPING WITHIN LEFT EXIT REGION OF MID/UPPER LEVEL
JET STREAK DIGGING SEWD ACROSS THE MIDDLE MS VALLEY.  AIR MASS IS
RAPIDLY DESTABILIZING IMMEDIATELY AHEAD OF THE COLD FRONT WHERE
CLOUDS HAVE CLEARED AND STRONG AFTERNOON HEATING IS OCCURRING.THIS
IS RESULTING IN UNSTABLE ENVIRONMENT WITH MLCAPE OF 1000-1500 J/KG. 
STORMS ARE EXPECTED TO SPREAD SEWD THROUGH THE AFTERNOON.

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 400. MEAN STORM
MOTION VECTOR 30025.

...WEISS

;431,0873 392,0873 392,0893 430,0894;