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243 

WWUS20 KWNS 201510

SEL3

SPC WW 201510

TXZ000-202200-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 253

NWS Storm Prediction Center Norman OK

1010 AM CDT Sat May 20 2017



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  South Central Texas



* Effective this Saturday morning and afternoon from 1010 AM

  until 500 PM CDT.



* Primary threats include...

  Scattered large hail and isolated very large hail events to 2.5

    inches in diameter possible

  Scattered damaging wind gusts to 70 mph possible

  A tornado or two possible



SUMMARY...Strong/severe storms currently west of San Antonio are

expected to develop eastward and southeastward along an outflow

boundary into a very warm and moist air mass.  The stronger storms

will be capable of producing large hail and damaging wind gusts.



The severe thunderstorm watch area is approximately along and 60

statute miles either side of a line from 90 miles west northwest of

Cotulla TX to 20 miles east northeast of Victoria TX. For a complete

depiction of the watch see the associated watch outline update

(WOUS64 KWNS WOU3).



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.



&&



AVIATION...A few severe thunderstorms with hail surface and aloft to

2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A

few cumulonimbi with maximum tops to 550. Mean storm motion vector

26025.



...Weiss

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