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822 

WWUS20 KWNS 131030

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SPC WW 131030

MNZ000-WIZ000-131800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 608

NWS STORM PREDICTION CENTER NORMAN OK

525 AM CDT FRI AUG 13 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHEASTERN MINNESOTA

       WESTERN AND CENTRAL WISCONSIN



EFFECTIVE THIS FRIDAY MORNING AND AFTERNOON FROM 525 AM UNTIL 100

PM CDT.



HAIL TO 1 INCH 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 145

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTHEAST OF

EAU CLAIRE WISCONSIN TO 40 MILES SOUTHEAST OF ROCHESTER

MINNESOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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...THIS SEVERE THUNDERSTORM WATCH REPLACES

SEVERE THUNDERSTORM WATCH NUMBER 606. WATCH NUMBER 606 WILL NOT

BE IN EFFECT AFTER 525 AM CDT. CONTINUE...WW 607...



DISCUSSION...SUSTAINED TSTMS AND POSSIBLE SUPERCELLS EXPECTED TO

PERSIST AND MOVE/DEVELOP E INTO CNTRL WI LATER THIS MORNING AS

ASSOCIATED LOW-LVL WAA/MOISTURE TRANSPORT FIELD MOVES E AHEAD OF

DAKOTAS UPR TROUGH.  QUALITY OF MOISTURE INFLOW AND AVAILABILITY OF

STEEP MID LVL LAPSE RATES SUGGEST POTENTIAL FOR ADDITIONAL EPISODES

OF DMGG WIND...AND POSSIBLY A TORNADO...GIVEN MODERATELY SHEARED

WIND FIELD.



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

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

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

VECTOR 26025.





...CORFIDI

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