

437 

WWUS20 KWNS 152257

SEL7

SPC WW 152257

NEZ000-160300-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 337

NWS Storm Prediction Center Norman OK

600 PM CDT Wed Aug 15 2018



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  A small part of central and southwest Nebraska



* Effective this Wednesday evening from 600 PM until 1000 PM CDT.



* Primary threats include...

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  Isolated damaging wind gusts to 70 mph possible



SUMMARY...A cluster of supercells along an outflow boundary should

persist through late evening while moving southeastward.  The storm

environment will be sufficient to maintain the supercells with an

attendant threat for large hail and damaging winds.



The severe thunderstorm watch area is approximately along and 35

statute miles north and south of a line from 70 miles west of North

Platte NE to 25 miles east southeast of North Platte NE. 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

32020.



...Thompson

