SEL5
SPC WW 042004
IDZ000-NVZ000-UTZ000-050300-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 665
NWS STORM PREDICTION CENTER NORMAN OK
205 PM MDT TUE SEP 4 2007
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SOUTHEAST IDAHO
NORTHEAST NEVADA
NORTHERN UTAH
EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 205 PM UNTIL
900 PM MDT.
HAIL TO 2 INCHES 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 90
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 85 MILES WEST
SOUTHWEST OF WENDOVER UTAH TO 65 MILES EAST SOUTHEAST OF MALAD
CITY IDAHO. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).
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.
DISCUSSION...THUNDERSTORMS ARE INTENSIFYING OVER NORTHEAST NV AHEAD
OF UPPER TROUGH...AND IN REGION OF STRONG DAYTIME HEATING. THESE
STORMS ARE LIKELY TO BECOME SEVERE THIS AFTERNOON AND EARLY
EVENING...MOVING/DEVELOPING EASTWARD INTO PARTS OF NORTHERN UT AND
SOUTHEAST ID. COOLING TEMPERATURES ALOFT AND FAVORABLE VERTICAL
SHEAR PROFILES INDICATE A RISK OF BOWS/SUPERCELLS CAPABLE OF HAIL
AND DAMAGING WINDS.
AVIATION...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 450. MEAN STORM
MOTION VECTOR 24030.
..HART
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