WATCHES: Severe Thunderstorm Watch Number 691

WWUS20 KWNS 150030
SEL1
SPC WW 150030
MNZ000-WIZ000-LSZ000-150600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 691
NWS STORM PREDICTION CENTER NORMAN OK
730 PM CDT MON JUL 14 2008

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

MUCH OF NORTHERN MINNESOTA
SMALL PART OF NORTHWEST WISCONSIN
LAKE SUPERIOR

EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 730 PM UNTIL
100 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 60
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 60 MILES SOUTHWEST
OF BEMIDJI MINNESOTA TO 50 MILES EAST NORTHEAST OF SILVER BAY
MINNESOTA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).

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 690...

DISCUSSION...THUNDERSTORMS CONTINUE TO INCREASE IN NUMBER AND
INTENSITY ALONG/AHEAD OF COLD FRONT NRN MN. WITH 30-40 KT OF SHEAR
ALONG WITH STEEP LAPSE RATES AND MLCAPES AOA 1500 J/KG...STORMS WILL
HAVE POTENTIAL OF PRODUCING DAMAGING WINDS AND LARGE HAIL AS THEY
DEVELOP S OF E.

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 28030.

...HALES

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