

000 

WWUS20 KWNS 290030

SEL8

SPC WW 290030

NDZ000-290500-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 768

NWS STORM PREDICTION CENTER NORMAN OK

730 PM CDT MON JUL 28 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL NORTH DAKOTA



EFFECTIVE THIS MONDAY NIGHT FROM 730 PM UNTIL MIDNIGHT 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 60 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 55 MILES WEST OF BISMARCK

NORTH DAKOTA TO 30 MILES EAST SOUTHEAST OF JAMESTOWN NORTH

DAKOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 767...



DISCUSSION...THUNDERSTORMS HAVE BEGUN TO RAPIDLY INTENSIFY OVER

CENTRAL ND AHEAD OF APPROACHING SHORTWAVE TROUGH.  EXTREME

INSTABILITY AND FAVORABLE EFFECTIVE SHEAR VALUES WILL PROMOTE

SUPERCELL STORMS CAPABLE OF LARGE HAIL AND DAMAGING WINDS.  INITIAL

STORMS MAY ALSO POSE A THREAT OF ISOLATED TORNADOES DUE TO BACKED

SURFACE WINDS AND DEGREE OF CAPE.



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

600. MEAN STORM MOTION VECTOR 30025.





...HART

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