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WWUS20 KWNS 222315

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MNZ000-NDZ000-SDZ000-230700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 674

NWS STORM PREDICTION CENTER NORMAN OK

615 PM CDT FRI JUL 22 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       FAR WEST CENTRAL MINNESOTA

       SOUTHEAST NORTH DAKOTA

       NORTHEAST SOUTH DAKOTA



EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 615 PM

UNTIL 200 AM CDT.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 100 MILES WEST NORTHWEST OF

ABERDEEN SOUTH DAKOTA TO 30 MILES NORTH NORTHEAST OF ORTONVILLE

MINNESOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



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.



OTHER WATCH INFORMATION...CONTINUE...WW 670...WW 671...WW

672...WW 673...



DISCUSSION...TSTMS FORMING ALONG W/E WARM FRONT IN NE SD MAY POSE A

THREAT FOR SVR WEATHER AS ACTIVITY BUILDS/MOVES GENERALLY NWD.

OTHER STORMS...LIKELY SLIGHTLY ELEVATED...MAY FORM ALONG PARALLEL

BOUNDARY FARTHER N IN SE ND.  WHILE AREA SHEAR IS WEAKER THAN THAT

IN WRN ND/SD AREA...COMBINATION OF FAIRLY RICH LOW LVL MOISTURE WITH

LOW LVL VEERING WIND PROFILES /PER AREA VWPS/ SUGGESTS A CHANCE FOR

A TORNADO OR TWO...IN ADDITION TO LOCALLY DMGG WIND/HAIL.



AVIATION...TORNADOES AND 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

550. MEAN STORM MOTION VECTOR 21020.





...CORFIDI

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