

725 

WWUS20 KWNS 090057

SEL9

SPC WW 090057

SDZ000-090600-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 249

NWS Storm Prediction Center Norman OK

700 PM MDT Tue Jun 8 2021



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Western South Dakota



* Effective this Tuesday night from 700 PM until Midnight MDT.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph possible

  Scattered large hail events to 1.5 inches in diameter possible



SUMMARY...High-based thunderstorms now forming in Wyoming will

spread into western South Dakota with some intensification possible

this evening.  The stronger storms in a broken band may produce

occasional damaging gusts and large hail.



The severe thunderstorm watch area is approximately along and 50

statute miles east and west of a line from 35 miles northeast of

Buffalo SD to 35 miles south of Rapid City SD. 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 247...WW 248...



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 550. Mean storm motion vector

24020.



...Thompson

