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029 

WWUS20 KWNS 011908

SEL1

SPC WW 011908

IAZ000-MNZ000-SDZ000-WIZ000-LSZ000-020300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 581

NWS STORM PREDICTION CENTER NORMAN OK

210 PM CDT FRI JUL 1 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EXTREME NORTHWEST IOWA

       SOUTHERN AND EASTERN MINNESOTA

       EASTERN SOUTH DAKOTA

       NORTHWEST WISCONSIN

       LAKE SUPERIOR



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 210 PM UNTIL

1000 PM CDT.



HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 90

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

BROOKINGS SOUTH DAKOTA TO 35 MILES EAST OF KENNEDY WISCONSIN.

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.



DISCUSSION...THUNDERSTORMS ARE EXPECTED TO RAPIDLY INTENSIFY THIS

AFTERNOON OVER EASTERN SD AND SOUTHERN MN AHEAD OF AN UPPER

TROUGH...AND ALONG A COLD FRONT OVER NORTHERN MN.  ALL OF THESE

STORMS WILL SPREAD ACROSS THE WATCH AREA THROUGH THE EVENING HOURS.

BOW ECHOES CAPABLE OF DAMAGING WINDS...ALONG WITH INTENSE CELLS

CAPABLE OF SUPERCELLS ARE POSSIBLE.



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

TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 25030.





...HART

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