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WWUS20 KWNS 210917

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URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 153

NWS Storm Prediction Center Norman OK

415 AM CDT Fri Apr 21 2017



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Western and central Oklahoma

  Texas and Oklahoma Panhandles



* Effective this Friday morning from 415 AM until NOON CDT.



* Primary threats include...

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  Scattered damaging wind gusts to 70 mph possible



SUMMARY...Hail potential will increase over the watch area the next

few hours as scattered thunderstorms continue to develop and

increase in coverage from the Panhandles into western Oklahoma.

Activity should coalesce into a semi-elevated, forward-propagating

storm complex through mid-morning, sweeping east or east-southeast

across western/central Oklahoma, with an increasing threat for

severe gusts as the complex gets better-organized and approaches a

surface front.



The severe thunderstorm watch area is approximately along and 60

statute miles either side of a line from 20 miles west northwest of

Dalhart TX to 35 miles south of Chandler OK. 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.



&&



OTHER WATCH INFORMATION...This severe thunderstorm watch replaces

severe thunderstorm watch number 152. Watch number 152 will not

be in effect after 415 AM CDT.



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 500. Mean storm motion vector

28030.



...Edwards

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