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WWUS20 KWNS 091959

SEL9

SPC WW 091959

TXZ000-100300-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 159

NWS Storm Prediction Center Norman OK

300 PM CDT Sun May 9 2021



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Parts of central and east Texas



* Effective this Sunday afternoon and evening from 300 PM until

  1000 PM CDT.



* Primary threats include...

  Scattered large hail and isolated very large hail events to 3

    inches in diameter likely

  Scattered damaging wind gusts to 70 mph possible



SUMMARY...Scattered severe thunderstorms are expected to form this

afternoon and persist into late evening, along and ahead of a

slow-moving cold front.  The storm environment will favor splitting

supercells initially with the threat for isolated very large hail to

baseball size or larger.  By this evening, some clustering of storms

could also lead to an increase in the threat for damaging outflow

gusts.



The severe thunderstorm watch area is approximately along and 75

statute miles north and south of a line from 60 miles northwest of

San Antonio TX to 5 miles southeast of Tyler TX. For a complete

depiction of the watch see the associated watch outline update

(WOUS64 KWNS WOU9).



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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 157...WW 158...



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

30020.



...Thompson

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