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WWUS20 KWNS 072023

SEL4

SPC WW 072023

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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 664

NWS STORM PREDICTION CENTER NORMAN OK

325 PM CDT MON JUL 7 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       FAR NORTHWESTERN MINNESOTA

       CENTRAL AND EASTERN NORTH DAKOTA



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 325 PM UNTIL 900

PM CDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 95

STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTHEAST OF

DEVILS LAKE NORTH DAKOTA TO 70 MILES SOUTH OF JAMESTOWN NORTH

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

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



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.



OTHER WATCH INFORMATION...CONTINUE...WW 663...



DISCUSSION...SHORTWAVE TROUGH DRIVING ESEWD ACROSS ND WILL CONTINUE

INCREASING SEVERE THUNDERSTORM THREAT THIS EVENING AS AIR MASS

BECOMES MODERATELY UNSTABLE.  SHEAR WILL SUPPORT

SUPERCELLS...INCREASING THE THREATS OF LARGE HAIL AND DAMAGING

WINDS.



AVIATION...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 450. MEAN STORM

MOTION VECTOR 28025.





...EVANS

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