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WWUS20 KWNS 021022

SEL7

SPC WW 021022

MNZ000-WIZ000-021800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 717

NWS STORM PREDICTION CENTER NORMAN OK

520 AM CDT TUE AUG 2 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHERN MINNESOTA

       WESTERN WISCONSIN



EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 520 AM UNTIL

100 PM CDT.



HAIL TO 1.5 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 55

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES NORTHEAST

OF EAU CLAIRE WISCONSIN TO 10 MILES SOUTH OF ORTONVILLE

MINNESOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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 714...WW 715...WW 716...



DISCUSSION...SMALL FORWARD PROPAGATING MCS NOW E OF ATY IN ERN SD

EXPECTED TO MOVE GENERALLY ENE TOWARD THE STC/MSP AREAS...WITH

ADDITIONAL DEVELOPMENT POSSIBLE ON THE NRN EDGE OF SYSTEM AS IT

MOVES CLOSER TO COLD FRONT NOW APPROACHING IT FROM THE NW.  OTHER

STORMS MAY INCREASE/FORM IN THE MSP AREA...ALONG SHALLOW WRN EXTENT

OF OUTFLOW BOUNDARY LEFT BY NRN WI MCS.  GIVEN STRENGTH OF WIND

FIELD /35 KT WLY DEEP SHEAR/...HI PW /CLOSE TO 2 INCHES/...AND STEEP

MID LVL LAPSE RATES...POTENTIAL WILL EXIST FOR SPORADIC WET

MICROBURSTS AND POSSIBLY MARGINALLY SVR HAIL.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 26030.





...CORFIDI

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