

253 

WWUS20 KWNS 042121

SEL0

SPC WW 042121

NEZ000-SDZ000-050300-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 550

NWS Storm Prediction Center Norman OK

325 PM MDT Sun Aug 4 2019



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Parts of north central and northwestern Nebraska

  Parts of south central and southwestern South Dakota



* Effective this Sunday afternoon and evening from 325 PM until

  900 PM MDT.



* Primary threats include...

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  Scattered damaging wind gusts to 70 mph possible



SUMMARY...Clusters of storms, including embedded supercells, will

likely persist while moving southeastward along a residual boundary

from South Dakota into Nebraska.  Damaging winds and large hail will

be the main threats into this evening.



The severe thunderstorm watch area is approximately along and 50

statute miles north and south of a line from 85 miles west of

Valentine NE to 25 miles northeast of Ainsworth NE. 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.



&&



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 600. Mean storm motion vector

31025.



...Thompson

