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WWUS20 KWNS 140653

SEL0

SPC WW 140653

NDZ000-141400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 270

NWS STORM PREDICTION CENTER NORMAN OK

155 AM CDT MON MAY 14 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND EASTERN NORTH DAKOTA



EFFECTIVE THIS MONDAY MORNING FROM 155 AM UNTIL 900 AM CDT.



HAIL TO 1 INCH 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 85

STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHWEST OF

DEVILS LAKE NORTH DAKOTA TO 70 MILES SOUTH SOUTHWEST OF JAMESTOWN

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

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 269...



DISCUSSION...BOW MCS APPROACHING THE MO RVR EXPECTED TO CONTINUE

ENE.  ELY LOW LEVEL FLOW AHEAD OF SYSTEM...AND LIKELY PRESENCE OF

STEEP LAPSE RATE PLUME /RESIDUAL AFTERNOON BOUNDARY LAYER/ ABOVE

NEAR-SFC INVERSION SHOULD ALLOW FOR CONTINUED DEVELOPMENT OF NEW

CELLS.  MAIN SVR THREAT SHOULD CONTINUE TO BE HIGH WIND...WITH AN

ISOLATED TORNADO AND MARGINALLY SVR HAIL ALSO POSSIBLE.



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

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

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

VECTOR 26040.





...CORFIDI

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