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WWUS20 KWNS 290152

SEL8

SPC WW 290152

MIZ000-290600-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 468

NWS Storm Prediction Center Norman OK

955 PM EDT Fri Aug 28 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Lower Michigan



* Effective this Friday night and Saturday morning from 955 PM

  until 200 AM EDT.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph possible

  Isolated large hail events to 1.5 inches in diameter possible

  A tornado or two possible



SUMMARY...Clusters of storms including the possibility of a

supercell or two will spread east-southeastward across the southern

half of Lower Michigan this evening, with isolated damaging winds

and some severe hail as the primary hazards.



The severe thunderstorm watch area is approximately along and 40

statute miles north and south of a line from 25 miles southwest of

Grand Rapids MI to 25 miles north northeast of Ann Arbor MI. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU8).



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

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

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

28020.



...Guyer

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