

811 

WWUS20 KWNS 132057

SEL7

SPC WW 132057

KSZ000-OKZ000-TXZ000-140400-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 87

NWS Storm Prediction Center Norman OK

400 PM CDT Sun May 13 2018



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Southwest Kansas

  Western Oklahoma

  Northwest Texas



* Effective this Sunday afternoon and evening from 400 PM until

  1100 PM CDT.



* Primary threats include...

  Scattered damaging winds and isolated significant gusts to 85

    mph possible

  Scattered large hail and isolated very large hail events to 3

    inches in diameter possible



SUMMARY...Isolated to perhaps widely scattered storms should develop

along a quasi-stationary front and dryline. While overall coverage

of severe storms may be limited, potential exists for isolated

significant severe wind and hail given large instability.



The severe thunderstorm watch area is approximately along and 60

statute miles east and west of a line from 70 miles south of

Childress TX to 40 miles west northwest of Medicine Lodge KS. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU7).



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 86...



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

3 inches. Extreme turbulence and surface wind gusts to 75 knots. A

few cumulonimbi with maximum tops to 500. Mean storm motion vector

25020.



...Grams

