WATCHES: Tornado Watch Number 470

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

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