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030 

WWUS20 KWNS 010052

SEL2

SPC WW 010052

ARZ000-ILZ000-KYZ000-MOZ000-TNZ000-010700-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 142

NWS Storm Prediction Center Norman OK

755 PM CDT Thu May 31 2018



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  North central and northeast Arkansas

  Southern Illinois

  Western Kentucky

  Southern Missouri

  Northwest Tennessee



* Effective this Thursday night and Friday morning from 755 PM

  until 200 AM CDT.



* Primary threats include...

  Scattered large hail likely with isolated very large hail events

    to 2 inches in diameter possible

  Scattered damaging wind gusts to 70 mph likely

  A tornado or two possible



SUMMARY...Clusters of severe storms have been expanding in coverage

the past 1-2 hours from southern Missouri into southern Illinois.

Splitting supercells with large hail will be possible for the next

couple of hours, while mergers could eventually lead to upscale

growth and some increase in the damaging wind threat.  Once the

storms merge and develop a larger cold pool, the hail/wind threat

should spread southeastward into Arkansas and northwest Tennessee

overnight.



The severe thunderstorm watch area is approximately along and 55

statute miles north and south of a line from 15 miles west of

Harrison AR to 50 miles east of Paducah KY. For a complete depiction

of the watch see the associated watch outline update (WOUS64 KWNS

WOU2).



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...This severe thunderstorm watch replaces

tornado watch number 138. Watch number 138 will not be in effect

after 755 PM CDT. CONTINUE...WW 139...WW 140...WW 141...



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 500. Mean storm motion vector

31025.



...Thompson

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