

952 

WWUS20 KWNS 262003

SEL7

SPC WW 262003

NDZ000-270300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 417

NWS STORM PREDICTION CENTER NORMAN OK

305 PM CDT SAT JUN 26 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTH DAKOTA



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 305 PM UNTIL

1000 PM CDT.



HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 20 MILES SOUTH OF

WILLISTON NORTH DAKOTA TO 5 MILES EAST OF GRAND FORKS NORTH

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

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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 415...WW 416...



DISCUSSION...STEADY INCREASE IN TSTM COVERAGE AND IN ACCOMPANYING

SVR POTENTIAL IS EXPECTED OVER REMAINDER MID-LATE AFTERNOON...ON

BOTH SIDES OF COLD FRONT SLATED TO MOVE EWD ACROSS WW AREA. GREATEST

SHEAR/BUOYANCY JUXTAPOSITION SHOULD REMAIN E OF CONFLUENCE LINE OVER

ERN ND...AS PER MESOSCALE DISCUSSION 1134...HOWEVER LARGE HAIL ALSO

IS POSSIBLE WITH POST-FRONTAL TSTMS.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 25035.





...EDWARDS/IMY

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