

618 

WWUS20 KWNS 072051

SEL0

SPC WW 072051

MNZ000-NDZ000-SDZ000-WIZ000-080600-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 420

NWS Storm Prediction Center Norman OK

345 PM CDT Fri Aug 7 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  central Minnesota

  southeastern North Dakota

  northeastern South Dakota

  northwestern Wisconsin



* Effective this Friday afternoon and Saturday morning from 345

  PM until 100 AM CDT.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph likely

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  A tornado or two possible



SUMMARY...Severe thunderstorms, including a couple of supercells,

are expected to form across parts of the Red River Valley into west

central Minnesota late this afternoon, before consolidating into an

organizing cluster by early evening.  This cluster of storms is

expected to then track east-southeastward across the remainder of

central Minnesota into northwestern Wisconsin by late evening.

Initial storms may pose a risk for severe hail, with some potential

for an isolated tornado or two, before strong wind gusts become the

primary severe hazard later this evening.



The severe thunderstorm watch area is approximately along and 65

statute miles north and south of a line from 45 miles southwest of

Detroit Lakes MN to 70 miles east northeast of Saint Cloud MN. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU0).



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 60 knots. A

few cumulonimbi with maximum tops to 550. Mean storm motion vector

28025.



...Kerr

