

512 

WWUS20 KWNS 302153

SEL5

SPC WW 302153

MNZ000-NDZ000-SDZ000-310500-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 475

NWS Storm Prediction Center Norman OK

455 PM CDT Sun Aug 30 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Far western Minnesota

  Southeast North Dakota

  Eastern South Dakota



* Effective this Sunday afternoon from 455 PM until Midnight CDT.



* Primary threats include...

  Scattered large hail likely with isolated very large hail events

    to 2.5 inches in diameter possible

  Scattered damaging wind gusts to 70 mph possible

  A tornado or two possible



SUMMARY...Storms are expected to increase near an

east/southeastward-moving cold front, initially across east-central

South Dakota and southeast North Dakota. These storms will spread

eastward across eastern South Dakota toward far western Minnesota

this evening. Large hail and damaging winds are expected with the

most intense storms.



The severe thunderstorm watch area is approximately along and 55

statute miles east and west of a line from 90 miles northeast of

Aberdeen SD to 60 miles south southwest of Mitchell SD. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU5).



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.



&&



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

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

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

29025.



...Guyer

