WATCHES: Severe Thunderstorm Watch Number 166

WWUS20 KWNS 172004
SEL6
SPC WW 172004
TXZ000-180100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 166
NWS STORM PREDICTION CENTER NORMAN OK
305 PM CDT FRI MAY 17 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
CENTRAL AND NORTH CENTRAL TEXAS

* EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 305 PM UNTIL
800 PM CDT.

* PRIMARY THREATS INCLUDE...
SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 3
INCHES IN DIAMETER POSSIBLE
SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 45
STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES SOUTH OF
BROWNWOOD TEXAS TO 50 MILES NORTH NORTHWEST OF MINERAL WELLS
TEXAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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...CONVECTION IS DEEPENING OVER PARTS OF TX ALONG THE
DRYLINE TO THE EAST OF SJT AND EAST OF ABI. AIR MASS EAST OF THE
DRYLINE IS MOIST AND VERY UNSTABLE WITH CAPE VALUES UP TO 4000 J/KG.
ALTHOUGH WINDS ALOFT ARE RELATIVELY WEAK...VERY FAVORABLE
THERMODYNAMIC ENVIRONMENT/STEEP LAPSE RATES INDICATES THREAT FOR A
FEW STORMS TO PRODUCE VERY LARGE HAIL AND LOCALIZED DAMAGING WIND
GUSTS.

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 24015.


...WEISS

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