SEL7
SPC WW 161834
TXZ000-170100-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 57
NWS STORM PREDICTION CENTER NORMAN OK
1235 PM CST SAT FEB 16 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
CENTRAL TEXAS
EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 1235 PM UNTIL
700 PM CST.
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 75
STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES WEST OF NEW
BRAUNFELS TEXAS TO 20 MILES WEST NORTHWEST OF SHERMAN TEXAS. FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU7).
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...INCREASE IN THUNDERSTORM COVERAGE AND INTENSITY WILL
CONTINUE ENEWD ACROSS WW THIS AFTERNOON AHEAD OF VERY STRONG UPPER
SYSTEM NOW MOVING ACROSS SWRN TX. DESPITE COOL AND STABLE SURFACE
CONDITIONS...STEEP MID LEVEL LAPSE RATES AND STRONG ASCENT WILL
MAINTAIN A FEW STRONGER STORMS. IN ADDITION...SUFFICIENT EFFECTIVE
BULK SHEAR FOR SUPERCELLS WILL ENHANCE THE POTENTIAL FOR LARGE HAIL
WITH THE MORE INTENSE CORES.
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 22035.
..EVANS
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