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WWUS20 KWNS 251944

SEL7

SPC WW 251944

COZ000-KSZ000-NEZ000-260300-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 267

NWS Storm Prediction Center Norman OK

245 PM CDT Thu May 25 2017



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  northeast Colorado

  northwestern Kansas

  southwestern Nebraska



* Effective this Thursday afternoon and evening from 245 PM until

  1000 PM CDT.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph likely

  Isolated very large hail events to 2 inches in diameter possible

  A tornado or two possible



SUMMARY...An area of developing thunderstorms over northeastern

Colorado appears likely to increase further in coverage and

intensity while spreading east southeastward across the watch area

through this evening.  A small upscale growing mesoscale convective

system may eventually evolve, with increasing potential for severe

wind gusts, particularly near the Interstate 70 corridor of

northwestern Kansas.



The severe thunderstorm watch area is approximately along and 65

statute miles north and south of a line from 40 miles northwest of

Burlington CO to 40 miles east of Hill City 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.



&&



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 450. Mean storm motion vector

27035.



...Kerr

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