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WWUS20 KWNS 181815

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SPC WW 181815

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URGENT - IMMEDIATE BROADCAST REQUESTED

Tornado Watch Number 235

NWS Storm Prediction Center Norman OK

115 PM CDT Thu May 18 2017



The NWS Storm Prediction Center has issued a



* Tornado Watch for portions of

  western Oklahoma

  western north Texas



* Effective this Thursday afternoon and evening from 115 PM until

  800 PM CDT.



...THIS IS A PARTICULARLY DANGEROUS SITUATION...



* Primary threats include...

  Several tornadoes and a few intense tornadoes likely

  Scattered large hail likely with isolated very large hail events

    to 4 inches in diameter possible

  Scattered damaging winds and isolated significant gusts to 80

    mph possible



SUMMARY...Thunderstorms are forecast to develop/increase rapidly

over the next 1-2 hours across eastern portions of the Texas

Panhandle and into western Oklahoma and western north Texas,

spreading northeastward with time.  Multiple rounds of storm

redevelopment will be possible over western parts of the watch.  In

addition to the risk for very large/damaging hail and locally

damaging winds,  tornadoes -- a couple likely to be

significant/intense -- are expected.



The tornado watch area is approximately along and 75 statute miles

east and west of a line from 15 miles west northwest of Alva OK to

75 miles west southwest of Wichita Falls TX. For a complete

depiction of the watch see the associated watch outline update

(WOUS64 KWNS WOU5).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A Tornado Watch means conditions are favorable for

tornadoes and 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.



&&



AVIATION...Tornadoes and a few severe thunderstorms with hail

surface and aloft to 4 inches. Extreme turbulence and surface wind

gusts to 70 knots. A few cumulonimbi with maximum tops to 500. Mean

storm motion vector 23040.



...Goss

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