

000 

WWUS20 KWNS 101707

SEL6

SPC WW 101707

IAZ000-MNZ000-WIZ000-102300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 676

NWS STORM PREDICTION CENTER NORMAN OK

1210 PM CDT THU JUL 10 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST IOWA

       CENTRAL AND SOUTHEAST MINNESOTA

       WEST CENTRAL AND SOUTHWEST WISCONSIN



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 1210 PM UNTIL

600 PM CDT.



HAIL TO 2 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 55 MILES NORTHWEST

OF MANKATO MINNESOTA TO 45 MILES EAST OF LA CROSSE WISCONSIN.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 675...



DISCUSSION...COMPLEX OF THUNDERSTORMS WILL LIKELY INCREASE AS AIR

MASS DESTABILIZES ACROSS THE REGION...AND TRACK SEWD ALONG WELL

DEFINED SURFACE FRONT/INSTABILITY AXIS INTO WRN WI THROUGH THE

AFTERNOON.  DAMAGING WINDS WILL BE LIKELY WITH THE MORE INTENSE

CORES AND POSSIBLY BECOME MORE WIDESPREAD AS ACTIVITY EVOLVES ALONG

A COMMON OUTFLOW.  ISOLATED LARGE HAIL IS ADDITIONAL HAZARD.



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 30030.





...EVANS

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