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WWUS20 KWNS 202141

SEL9

SPC WW 202141

NEZ000-210500-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 389

NWS Storm Prediction Center Norman OK

445 PM CDT Mon Jul 20 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Western and central Nebraska



* Effective this Monday afternoon from 445 PM until Midnight CDT.



* 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

  A tornado or two possible



SUMMARY...Initial supercells across parts of west-central Nebraska

will pose a risk for large hail before potentially developing into a

southeast-moving cluster in southwest Nebraska with an increasing

severe wind risk. Another cluster may emanate out of southwest and

south-central South Dakota and spread into portions of northern

Nebraska this evening with a severe hail and wind risk.



The severe thunderstorm watch area is approximately along and 70

statute miles east and west of a line from 40 miles south of North

Platte NE to 30 miles west northwest of Valentine NE. 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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 388...



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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