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352 

WWUS20 KWNS 210619

SEL9

SPC WW 210619

OKZ000-TXZ000-211200-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 289

NWS Storm Prediction Center Norman OK

120 AM CDT Sun Jun 21 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Southern Oklahoma

  North Texas



* Effective this Sunday morning from 120 AM until 700 AM CDT.



* Primary threats include...

  Isolated very large hail events to 2 inches in diameter possible

  Isolated damaging wind gusts to 70 mph possible



SUMMARY...A small MCS should gradually develop along the Red River

through daybreak. Ample instability will foster a risk for severe

hail, especially early, along with a risk for damaging winds towards

dawn.



The severe thunderstorm watch area is approximately along and 50

statute miles north and south of a line from 80 miles west southwest

of Ardmore OK to 35 miles southeast of Durant OK. For a complete

depiction of the watch see the associated watch outline update

(WOUS64 KWNS WOU9).



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 550. Mean storm motion vector

30020.



...Grams

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