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WWUS20 KWNS 222328

SEL7

SPC WW 222328

SDZ000-230300-



URGENT - IMMEDIATE BROADCAST REQUESTED

Tornado Watch Number 457

NWS Storm Prediction Center Norman OK

630 PM CDT Sun Aug 22 2021



The NWS Storm Prediction Center has issued a



* Tornado Watch for portions of

  Southeast South Dakota



* Effective this Sunday evening from 630 PM until 1000 PM CDT.



* Primary threats include...

  A couple tornadoes possible

  Isolated significant damaging wind gusts to 75 mph possible

  Isolated very large hail events to 2.5 inches in diameter

    possible



SUMMARY...A lone discrete supercell may persist for the next few

hours across southeast South Dakota.



The tornado watch area is approximately along and 30 statute miles

east and west of a line from 30 miles north northwest of Mitchell SD

to 40 miles south southeast of Mitchell SD. For a complete depiction

of the watch see the associated watch outline update (WOUS64 KWNS

WOU7).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A Tornado Watch means conditions are favorable for

tornadoes and 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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 455...WW 456...



AVIATION...Tornadoes and a few severe thunderstorms with hail

surface and aloft to 2.5 inches. Extreme turbulence and surface wind

gusts to 65 knots. A few cumulonimbi with maximum tops to 550. Mean

storm motion vector 29020.



...Grams

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