

697 

WWUS20 KWNS 192202

SEL7

SPC WW 192202

COZ000-KSZ000-NEZ000-SDZ000-WYZ000-200500-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 387

NWS Storm Prediction Center Norman OK

405 PM MDT Sun Jul 19 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Northeast Colorado

  Northwest Kansas

  Western Nebraska

  Southwest South Dakota

  Eastern Wyoming



* Effective this Sunday afternoon and evening from 405 PM until

  1100 PM MDT.



* Primary threats include...

  Scattered damaging winds and isolated significant gusts to 75

    mph possible

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  A tornado or two possible



SUMMARY...Widely scattered storms will continue to intensify across

the region, this includes some supercells capable of large hail,

particularly across eastern Wyoming, southwest South Dakota and

western Nebraska where deep-layer winds are strongest. Multiple

east/southeastward-moving clusters may evolve by evening, with

severe-caliber wind gusts also a possibility.



The severe thunderstorm watch area is approximately along and 90

statute miles east and west of a line from 70 miles east northeast

of Gillette WY to 65 miles south of Imperial 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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 385...WW 386...



AVIATION...A few severe thunderstorms with hail surface and aloft to

2 inches. Extreme turbulence and surface wind gusts to 65 knots. A

few cumulonimbi with maximum tops to 550. Mean storm motion vector

31020.



...Guyer

