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019 

WWUS20 KWNS 250727

SEL7

SPC WW 250727

MNZ000-WIZ000-LSZ000-251300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 517

NWS STORM PREDICTION CENTER NORMAN OK

225 AM CDT WED JUL 25 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND NORTHEAST MINNESOTA

       NORTHWEST WISCONSIN

       LAKE SUPERIOR



EFFECTIVE THIS WEDNESDAY MORNING FROM 225 AM UNTIL 800 AM 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 50

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES WEST OF

BRAINERD MINNESOTA TO 15 MILES SOUTH SOUTHEAST OF IRONWOOD

MICHIGAN.  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 515...WW 516...



DISCUSSION...A LINEAR MCS MOVING EWD AT 40 KT WILL PRODUCE A THREAT

FOR DAMAGING WINDS ACROSS CENTRAL AND PARTS OF NORTHEAST MN INTO

NORTHWEST WI THROUGH THE EARLY MORNING HOURS.  A FEED OF MODERATE

INSTABILITY WILL MAINTAIN THE LEAD LINE OF STORMS OVER CENTRAL MN

AND NEW STORMS DEVELOPING OVER WEST CENTRAL INTO CENTRAL MN.  WLY

MIDLEVEL WINDS OF 40-45 KT WILL PROMOTE LINEAR STORM MODES WITH

DAMAGING WINDS THE PRIMARY THREAT.



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 27040.





...PETERS/THOMPSON

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