Tuesday, May 27, 2008

Severe Thunderstorm Watch 380

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 380
NWS STORM PREDICTION CENTER NORMAN OK
235 PM CDT TUE MAY 27 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
PARTS OF SOUTHWESTERN OKLAHOMA
LARGE PART OF NORTHWEST TEXAS
EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 235 PM UNTIL
1000 PM CDT.
HAIL TO 3 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 75
STATUTE MILES EITHER SIDE OF A LINE FROM 35 MILES NORTH OF
CHILDRESS TEXAS TO 15 MILES EAST SOUTHEAST OF TEMPLE TEXAS. 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 378
...
WW 379
...
DISCUSSION...OUTFLOW AND FRONTAL BOUNDARIES WILL BE FOCUS FOR SEVERE
THUNDERSTORM DEVELOPMENT IN A VERY UNSTABLE BUT ONLY WEAKLY SHEARED
AIR MASS. GIVEN MLCAPES TO 3000 J/KG AND STEEP MID LEVEL LAPSE
RATES...ROTATING STORMS ARE LIKELY. HOWEVER PRIMARY THREAT WILL BE
VERY LARGE HAIL AND DAMAGING DOWNBURSTS AS THE STORM BASES SHOULD BE
RELATIVELY HIGH SHEAR AROUND 20KT.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
MOTION VECTOR 27015.
...HALES

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