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024 

WWUS20 KWNS 300904

SEL1

SPC WW 300904

MNZ000-NDZ000-SDZ000-WIZ000-301400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 401

NWS STORM PREDICTION CENTER NORMAN OK

405 AM CDT MON MAY 30 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL MINNESOTA

       SOUTHEAST NORTH DAKOTA

       NORTHEAST SOUTH DAKOTA

       EXTREME NORTHWEST WISCONSIN



EFFECTIVE THIS MONDAY MORNING FROM 405 AM UNTIL 900 AM CDT.



HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 60

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 80 MILES WEST

NORTHWEST OF ORTONVILLE MINNESOTA TO 60 MILES EAST NORTHEAST OF

SAINT CLOUD 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 400...



DISCUSSION...BAND OF ELEVATED CONVECTION WILL CONTINUE TO SPREAD

NWD/NEWD THROUGH THE EARLY MORNING HOURS...IN RESPONSE TO STRONG WAA

ON THE NOSE OF A 50-70 KT LLJ.  MUCAPE OF 1500-2000 J/KG AND

EFFECTIVE BULK SHEAR IN EXCESS OF 40 KT WILL SUPPORT A CONTINUED

RISK OF LARGE HAIL WITH THE STRONGER STORMS.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 22030.





...THOMPSON

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