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WWUS20 KWNS 062048

SEL3

SPC WW 062048

NEZ000-SDZ000-070400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 353

NWS STORM PREDICTION CENTER NORMAN OK

345 PM CDT WED JUN 6 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF WESTERN AND NORTHERN NEBRASKA

       MUCH OF CENTRAL AND PARTS OF WESTERN SOUTH DAKOTA



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 345 PM UNTIL

1100 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 75 STATUTE

MILES EAST AND WEST OF A LINE FROM 20 MILES SOUTH OF MULLEN

NEBRASKA TO 30 MILES NORTH NORTHWEST OF MOBRIDGE SOUTH DAKOTA.

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.



OTHER WATCH INFORMATION...CONTINUE...WW 352...



DISCUSSION...SEVERE THUNDERSTORMS WILL DEVELOP RAPIDLY AHEAD OF THE

DEEPENING SURFACE LOW AND UPPER TROUGH.  WITH A VERY STRONG WIND

PROFILE IN PLACE AND MLCAPES INCREASING TO IN EXCESS OF 2000

J/KG...SUPERCELLS WILL BE LIKELY.  TORNADOES AND VERY LARGE HAIL

WILL BE ASSOCIATED WITH SUPERCELLS...WITH STORMS EVOLVING INTO A

SQUALL LINE AFTER 00Z AS STRONG COLD FRONT MOVES ACROSS WATCH AREA.



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 23035.





...HALES

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