WATCHES: Severe Thunderstorm Watch Number 496

WWUS20 KWNS 241815
SEL6
SPC WW 241815
MNZ000-NDZ000-250100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 496
NWS STORM PREDICTION CENTER NORMAN OK
115 PM CDT SAT AUG 24 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHWESTERN MINNESOTA
NORTHEASTERN NORTH DAKOTA

* EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 115 PM UNTIL
800 PM CDT.

* PRIMARY THREATS INCLUDE...
SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 2
INCHES IN DIAMETER POSSIBLE
SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 110
STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHWEST OF
HALLOCK MINNESOTA TO 60 MILES SOUTH OF DEVILS LAKE NORTH DAKOTA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU6).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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...STORMS ARE EXPECTED TO INCREASE IN COVERAGE AND
INTENSITY FROM NORTHEASTERN NORTH DAKOTA INTO NORTHWESTERN MINNESOTA
ALONG AND OUTFLOW BOUNDARY AND PRE-FRONTAL CONFLUENCE ZONE.
MODERATE-STRONG INSTABILITY WITH MLCAPE FROM 2000-3000 J/KG AND
25-35 KT EFFECTIVE SHEAR WILL SUPPORT BOTH MULTICELL AND SOME
SUPERCELL STRUCTURES WITH ACTIVITY POSSIBLY EVOLVING INTO
CLUSTERS/LINES THIS EVENING. DAMAGING WIND AND LARGE HAIL WILL BE
THE MAIN THREATS.

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 25025.


...DIAL

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