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000 

WWUS20 KWNS 111924

SEL3

SPC WW 111924

MNZ000-NDZ000-SDZ000-120300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 683

NWS STORM PREDICTION CENTER NORMAN OK

225 PM CDT FRI JUL 11 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN AND CENTRAL MINNESOTA

       EASTERN NORTH DAKOTA

       NORTHEAST SOUTH DAKOTA



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 225 PM UNTIL

1000 PM CDT.



TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE

MILES EAST AND WEST OF A LINE FROM 10 MILES NORTHWEST OF WARROAD

MINNESOTA TO 10 MILES SOUTH SOUTHEAST OF REDWOOD FALLS MINNESOTA.

 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



DISCUSSION...THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG AND AHEAD

OF SURFACE LOW/COLD FRONT OVER EASTERN ND IN THE NEXT COUPLE OF

HOURS...SPREADING EASTWARD INTO MN.  VERY STRONG INSTABILITY AND

FAVORABLE SHEAR PROFILES WILL PROMOTE A RISK OF SUPERCELLS CAPABLE

OF VERY LARGE HAIL AND DAMAGING WINDS...ALONG WITH A FEW TORNADOES

NEAR THE WARM FRONT.  OTHER STORMS WILL LIKELY INTENSIFY SOUTHWARD

ALONG THE COLD FRONT INTO NORTHEAST SD AND CENTRAL MN LATER THIS

AFTERNOON.  ALL STORMS ARE EXPECTED TO ORGANIZE INTO A FAST MOVING

SQUALL LINE AFTER DARK WITH A CONTINUED THREAT OF DAMAGING WINDS AND

HAIL.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 27035.





...HART

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