WATCHES: Severe Thunderstorm Watch Number 650

WWUS20 KWNS 020230
SEL0
SPC WW 020230
MNZ000-WIZ000-LSZ000-020900-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 650
NWS STORM PREDICTION CENTER NORMAN OK
930 PM CDT TUE JUL 1 2008

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

NORTHEAST MINNESOTA
FAR NORTHWEST WISCONSIN
LAKE SUPERIOR

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 930 PM
UNTIL 400 AM 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 APPROXIMATELY ALONG AND 65
STATUTE MILES EITHER SIDE OF A LINE FROM 55 MILES NORTH NORTHWEST
OF BRAINERD MINNESOTA TO 10 MILES SOUTHEAST OF GRAND MARAIS
MINNESOTA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).

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 648...WW 649...

DISCUSSION...INCREASING WSWLY LLJ ASSOCIATED WITH STRONG MID LEVEL
SHORTWAVE TROUGH APPROACHING THE REGION WILL SUSTAIN ELEVATED
THUNDERSTORMS ACROSS WW THROUGH EARLY TONIGHT. FEED OF STEEP MID
LEVEL LAPSE RATES AND MODERATE INSTABILITY TO THE WSW OF THIS
REGION...ALONG WITH EFFECTIVE SHEAR FROM 40-50 KT...WILL ALSO
SUPPORT RISK OF LARGE HAIL AND ISOLATED DAMAGING WINDS WITH STRONGER
CORES.

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 500. MEAN STORM
MOTION VECTOR 32025.

...EVANS

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