

000 

WWUS20 KWNS 012103

SEL0

SPC WW 012103

NDZ000-SDZ000-020500-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 470

NWS STORM PREDICTION CENTER NORMAN OK

405 PM CDT SUN JUL 1 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN AND CENTRAL NORTH DAKOTA

       NORTHERN SOUTH DAKOTA



EFFECTIVE THIS SUNDAY AFTERNOON FROM 405 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 105 STATUTE

MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH NORTHWEST OF

MINOT NORTH DAKOTA TO 35 MILES SOUTH SOUTHEAST OF LEMMON SOUTH

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

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 468...WW 469...



DISCUSSION...TSTMS/SUPERCELLS EXPECTED TO FORM IN THE NEXT 1-2 HRS

IN AREA OF SUSTAINED WAA NE OF STATIONARY WRN SD SFC LOW.  50 KT

DEEP WSWLY SHEAR WITH A SUBSTANTIAL LOW LEVEL DIRECTIONAL COMPONENT

SUGGESTS ACTIVITY MAY POSE A THREAT FOR TORNADOES IN ADDITION TO SVR

HAIL/WIND GIVEN SBCAPE AOA 2000 J/KG.



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

550. MEAN STORM MOTION VECTOR 26030.





...CORFIDI

