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WWUS20 KWNS 282336

SEL0

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COZ000-KSZ000-NEZ000-290700-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 320

NWS Storm Prediction Center Norman OK

640 PM CDT Sat Jul 28 2018



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Northeastern Colorado

  Northwestern Kansas

  West central and southwestern Nebraska



* Effective this Saturday night and Sunday morning from 640 PM

  until 200 AM CDT.



* Primary threats include...

  Scattered large hail and isolated very large hail events to 2

    inches in diameter likely

  Scattered damaging winds likely with isolated significant gusts

    to 75 mph possible

  A tornado or two possible



SUMMARY...Isolated supercells with a threat for large hail and a

tornado or two will continue to spread southeastward from Wyoming

into northeastern Colorado for the next couple of hours.  Storms

across northwestern Nebraska will have the potential to grow upscale

into a larger cluster with the potential to produce damaging winds

and large hail while moving southeastward into early tonight.

Additional storms in eastern Colorado could produce isolated

downburst winds this evening.



The severe thunderstorm watch area is approximately along and 65

statute miles east and west of a line from 45 miles north northeast

of Alliance NE to 45 miles southeast of Goodland KS. For a complete

depiction of the watch see the associated watch outline update

(WOUS64 KWNS WOU0).



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 319...



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

2 inches. Extreme turbulence and surface wind gusts to 65 knots. A

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

32030.



...Thompson

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