WATCHES: Severe Thunderstorm Watch Number 664

WWUS20 KWNS 192243
SEL4
SPC WW 192243
WIZ000-LMZ000-200600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 664
NWS STORM PREDICTION CENTER NORMAN OK
545 PM CDT TUE JUL 19 2011

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

NORTHERN AND CENTRAL WISCONSIN
LAKE MICHIGAN

EFFECTIVE THIS TUESDAY AFTERNOON AND WEDNESDAY MORNING FROM 545
PM UNTIL 100 AM CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 85 MILES WEST
NORTHWEST OF WAUSAU WISCONSIN TO 35 MILES SOUTH SOUTHEAST OF
GREEN BAY WISCONSIN. FOR A COMPLETE DEPICTION OF THE WATCH SEE
THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).

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...A CLUSTER OF INTENSE THUNDERSTORMS OVER NORTHERN WI IS
EXPECTED TO ACCELERATE AND TRACK SOUTHEASTWARD ACROSS THE WATCH AREA
THIS AFTERNOON AND EVENING. A VERY UNSTABLE AIR MASS /MLCAPE VALUES
OF 4000+ J/KG/ AND 30-40 KNOTS OF MID LEVEL WINDS WILL PROMOTE FAST
MOVING STORMS CAPABLE OF LOCALLY DAMAGING WINDS AND HAIL. BOW ECHO
FORMATION IS POSSIBLE...WHICH WOULD INCREASE THE POTENTIAL OF A
WIDESPREAD WIND EVENT.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 30035.

...HART

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
To unsubscribe from WX-STORM send e-mail to LISTSERV@LISTSERV.ILLINOIS.EDU with
"unsub wx-storm" in the body of your message. For more information write cnovy@cox.net.