

113 

WWUS20 KWNS 301849

SEL6

SPC WW 301849

ORZ000-WAZ000-310200-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 236

NWS Storm Prediction Center Norman OK

1150 AM PDT Sat May 30 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Central and eastern Oregon

  Southern Washington



* Effective this Saturday morning and evening from 1150 AM until

  700 PM PDT.



* Primary threats include...

  Scattered damaging winds and isolated significant gusts to 85

    mph likely

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  A tornado or two possible



SUMMARY...Multiple supercells will likely initiate over

south-central Oregon and spread rapidly north-northeast towards the

western Columbia Basin into early evening. Large hail and a tornado

or two will be possible in the first few hours, with damaging winds

becoming the primary overall threat.



The severe thunderstorm watch area is approximately along and 60

statute miles east and west of a line from 90 miles south of Redmond

OR to 85 miles northeast of The Dalles OR. For a complete depiction

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

WOU6).



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 75 knots. A

few cumulonimbi with maximum tops to 500. Mean storm motion vector

19040.



...Grams

