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000 

WWUS20 KWNS 061807

SEL5

SPC WW 061807

NDZ000-070000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 245

NWS STORM PREDICTION CENTER NORMAN OK

110 PM CDT SUN MAY 6 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       LARGE PART OF NORTH DAKOTA



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 110 PM UNTIL 700

PM CDT.



TORNADOES...HAIL TO 2.5 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 70 STATUTE

MILES EAST AND WEST OF A LINE FROM 60 MILES SOUTH OF BISMARCK

NORTH DAKOTA TO 60 MILES NORTH NORTHWEST OF DEVILS LAKE NORTH

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

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 243...WW 244...



DISCUSSION...THUNDERSTORMS INCREASING JUST AHEAD OF THE

SURFACE/UPPER LOW THAT IS TRACKING NEWD ACROSS CENTRAL ND. STRONG

DEEP LAYER SHEAR AHEAD OF LOW COUPLED WITH MLCAPES TO 1000 J/KG

SUPPORT BOTH SUPERCELLS AND SHORT LINE SEGMENTS.  TORNADOES WILL BE

MOST LIKELY WITH ANY SUPERCELL THAT FORMS AS THE ACTIVITY DEVELOPS

NEWD THRU THE AFTERNOON.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

450. MEAN STORM MOTION VECTOR 22035.





...HALES

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