WATCHES: Severe Thunderstorm Watch Number 270

WWUS20 KWNS 012239
SEL0
SPC WW 012239
TXZ000-020600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 270
NWS STORM PREDICTION CENTER NORMAN OK
535 PM CDT SAT JUN 1 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SOUTHWEST AND SOUTH CENTRAL TEXAS

* EFFECTIVE THIS SATURDAY AFTERNOON AND SUNDAY MORNING FROM 535
PM UNTIL 100 AM CDT.

* PRIMARY THREATS INCLUDE...
SEVERAL DAMAGING WIND GUSTS WITH A FEW SIGNIFICANT GUSTS TO 80
MPH POSSIBLE
SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO
2.5 INCHES IN DIAMETER POSSIBLE

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES SOUTH
SOUTHWEST OF FORT STOCKTON TEXAS TO 25 MILES NORTH NORTHEAST OF
NEW BRAUNFELS TEXAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE
THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).

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...RAPID INTENSE THUNDERSTORM DEVELOPMENT IS ALREADY
UNDERWAY IN THE PECOS VALLEY...NEAR THE INTERSECTION OF THE DRYLINE
AND A SLOWLY SOUTHWARD ADVANCING COLD FRONT. ADDITIONAL STORM
DEVELOPMENT APPEARS PROBABLE ALONG THE FRONT EASTWARD INTO THE HILL
COUNTRY... AS CONVECTIVE INHIBITION CONTINUES TO WEAKEN IN PEAK
AFTERNOON HEATING. IN THE PRESENCE OF THERMODYNAMIC PROFILES
CHARACTERIZED BY A HOT AND DEEPLY MIXED BOUNDARY LAYER...STEEP
MID-LEVEL LAPSE RATES AND LARGE CAPE...AT LEAST A FEW SEVERE
THUNDERSTORMS ARE LIKELY THROUGH EARLY EVENING. STRONGEST STORMS
WILL BE CAPABLE OF PRODUCING VERY LARGE HAIL AND STRONG DOWNBURSTS.
CONSOLIDATING COLD POOLS AND THE UPSCALE GROWTH INTO A LARGE STORM
CLUSTER MAY NOT BE OUT OF THE QUESTION BY MID EVENING.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM
MOTION VECTOR 29010.


...KERR

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