737
WWUS20 KWNS 260012
SEL5
SPC WW 260012
OKZ000-TXZ000-260600-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 775
NWS STORM PREDICTION CENTER NORMAN OK
715 PM CDT SUN OCT 25 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SOUTHERN OKLAHOMA
NORTH CENTRAL TEXAS
EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 715 PM UNTIL
100 AM CDT.
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 85
STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES SOUTHEAST OF
STEPHENVILLE TEXAS TO 40 MILES NORTHEAST OF ARDMORE OKLAHOMA.
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...SCATTERED THUNDERSTORMS ARE INCREASING ALONG AND AHEAD
OF AN APPROACHING COLD FRONT OVER SOUTHERN OK AND NORTH CENTRAL TX.
RATHER COOL TEMPERATURES ALOFT AND INCREASING LOW LEVEL MOISTURE
WILL PROMOTE STRONG UPDRAFTS...WHILE SUFFICIENT EFFECTIVE SHEAR IS
PRESENT FOR A FEW SUPERCELLS. PRESENT INDICATIONS ARE THAT THE MAIN
THREAT WILL BE LARGE HAIL...AND ISOLATED 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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