SEL5
SPC WW 180021
WIZ000-LMZ000-180600-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 655
NWS STORM PREDICTION CENTER NORMAN OK
725 PM CDT SUN JUL 17 2011
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHERN WISCONSIN
LAKE MICHIGAN
EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 725 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 55 MILES WEST OF
RHINELANDER WISCONSIN TO 50 MILES SOUTH SOUTHEAST OF ESCANABA
MICHIGAN. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).
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 652...WW 653...WW 654...
DISCUSSION...A LARGE CLUSTER OF THUNDERSTORMS CONTINUES TO INCREASE
IN COVERAGE AND INTENSITY OVER NORTHERN WI. THESE STORMS MAY
ORGANIZE INTO A BOW AND TRACK SOUTHEASTWARD ACROSS THE WATCH AREA
WITH A RISK OF DAMAGING WINDS. VERY HIGH CAPE/MOISTURE PARAMETERS
SUGGEST STORMS MIGHT PERSIST FOR SEVERAL HOURS INTO LAKE MI.
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 29030.
...HART
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