[LeArc] Weather Watch : 9@ 7/8/2003 9:52:11 AM

[learc@mailman.qth.net]

The following weather message is provided by McDonough County E.S.D.A.


WWUS20 KWNS 081451
SEL9  
SPC WW 081450
IAZ000-ILZ000-LMZ000-082000-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 679 
NWS STORM PREDICTION CENTER NORMAN OK 
950 AM CDT TUE JUL 8 2003

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

       CENTRAL AND EASTERN IA IOWA
       NORTHERN ILLINOIS
       LAKE MICHIGAN

EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 950 AM UNTIL 300
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 70 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 10 MILES NORTH OF DES MOINES IOWA
TO 25 MILES SOUTH OF MEIGS FIELD 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...STORMS ARE EXPECTED TO INTENSIFY ALONG FRONTAL
BOUNDARY...THAT EXTENDS FROM SOUTH OF DSM TO SOUTH OF ORD...AS UPPER
LEVEL SHORTWAVE  TROUGH APPROACHES FROM THE WEST. MLCAPE VALUES NEAR
2000 J/KG WILL INCREASE TO 3000 J/KG BY MID AFTERNOON. MAIN THREAT
WILL BE LARGE HAIL...WITH WIND DAMAGE ALSO EXPECTED SOUTH OF THE
WARM FRONT.

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 25030.


...IMY

;424,0933 423,0873 402,0873 403,0933; 

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