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WWUS20 KWNS 232053

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URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 614

NWS Storm Prediction Center Norman OK

255 PM MDT Fri Aug 23 2019



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  The western Nebraska Panhandle

  Extreme southwestern South Dakota

  Much of central and eastern Wyoming



* Effective this Friday afternoon and evening from 255 PM until

  1000 PM MDT.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph possible

  Scattered large hail events to 1.5 inches in diameter possible



SUMMARY...Thunderstorms are forming across central Wyoming and

immediately east of the higher terrain into eastern Wyoming.  The

storm environment is sufficient for supercells across central

Wyoming, though growth into clusters with damaging winds and large

hail should be the primary concern through late evening.



The severe thunderstorm watch area is approximately along and 85

statute miles east and west of a line from 25 miles east southeast

of Cheyenne WY to 95 miles north northeast of Casper WY. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU4).



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 612...WW 613...



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

1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A

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

23025.



...Thompson

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