

656 

WWUS20 KWNS 152053

SEL1

SPC WW 152053

MNZ000-NDZ000-160400-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 441

NWS Storm Prediction Center Norman OK

355 PM CDT Sat Aug 15 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Northern Minnesota

  Far northeast North Dakota



* Effective this Saturday afternoon and evening from 355 PM until

  1100 PM CDT.



* Primary threats include...

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  Isolated damaging wind gusts to 65 mph possible

  A tornado or two possible



SUMMARY...Multiple supercells should develop across the Red River

Valley into northwest Minnesota by early evening. Large hail should

be the primary hazard, but a brief tornado or two and locally

damaging winds will also be possible.



The severe thunderstorm watch area is approximately along and 60

statute miles north and south of a line from 20 miles north

northwest of Grand Forks ND to 85 miles east of Bemidji MN. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU1).



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 inches. Extreme turbulence and surface wind gusts to 55 knots. A

few cumulonimbi with maximum tops to 450. Mean storm motion vector

29035.



...Grams

