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WWUS20 KWNS 221816

SEL8

SPC WW 221816

COZ000-KSZ000-230200-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 198

NWS Storm Prediction Center Norman OK

1215 PM MDT Fri Jun 22 2018



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Eastern Colorado

  Western Kansas



* Effective this Friday afternoon and evening from 1215 PM until

  800 PM MDT.



* Primary threats include...

  Scattered damaging winds and isolated significant gusts to 75

    mph likely

  Scattered large hail and isolated very large hail events to 2.5

    inches in diameter likely

  A tornado or two possible



SUMMARY...Thunderstorms are developing in a broken line from the

central Colorado Front Range into northeastern Colorado.  These

storms should intensify and increase in coverage through the

afternoon, while spreading east-southeastward toward western Kansas

later this afternoon/evening.  The initial more discrete/supercell

storms will be capable of producing very large hail, while growth of

the storms into a larger line will favor damaging winds and the more

substantial severe threat into this evening.  An isolated tornado

cannot be ruled out with more isolated storms that form across

southeastern Colorado ahead of the line.



The severe thunderstorm watch area is approximately along and 90

statute miles east and west of a line from 35 miles north northwest

of Burlington CO to 20 miles south southeast of Springfield CO. For

a complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU8).



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 197...



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

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

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

30040.



...Thompson

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