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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