

000 

WWUS20 KWNS 200235

SEL7

SPC WW 200235

ILZ000-WIZ000-200600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 707

NWS STORM PREDICTION CENTER NORMAN OK

935 PM CDT SAT JUL 19 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       FAR NORTHERN ILLINOIS

       FAR SOUTHERN WISCONSIN



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 935 PM

UNTIL 100 AM CDT.



HAIL TO 1.5 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 50

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 70 MILES WEST OF

ROCKFORD ILLINOIS TO 40 MILES EAST OF ROCKFORD ILLINOIS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU7).



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 703...WW 705...WW 706...



DISCUSSION...SMALL...WELL-DEFINED BOW ECHO MOVING OUT OF NERN IA HAS

A HISTORY OF STRONG/SEVERE WINDS.  ALTHOUGH AIR MASS IS SLOWLY

STABILIZING AHEAD OF IT OVER NRN IL/SRN WI...SYSTEM IS VERY

ORGANIZED AND MAY SUSTAIN A RISK OF DAMAGING WINDS AS IT TRACKS EWD

AT 40-45 KT LATE THIS EVENING.



AVIATION...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 27045.





...EVANS

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