

404 

WWUS20 KWNS 201812

SEL1

SPC WW 201812

MIZ000-LHZ000-LMZ000-210200-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 531

NWS Storm Prediction Center Norman OK

215 PM EDT Sat Jul 20 2019



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Lower Michigan

  Lake Huron

  Lake Michigan



* Effective this Saturday afternoon and evening from 215 PM until

  1000 PM EDT.



* Primary threats include...

  Scattered damaging winds likely with isolated significant gusts

    to 75 mph possible

  A tornado or two possible



SUMMARY...A line of storms will likely continue to organize/expand

and otherwise accelerate east-southeastward across Lower Michigan,

initially across central/far western Lower Michigan early this

afternoon, and then across eastern/southern Lower Michigan by late

afternoon/early evening. Damaging winds are highly likely with the

more intense storms and a tornado cannot be entirely ruled out.



The severe thunderstorm watch area is approximately along and 115

statute miles east and west of a line from 25 miles west northwest

of Oscoda MI to 10 miles south southeast of Kalamazoo MI. 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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 529...WW 530...



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

1 inch. Extreme turbulence and surface wind gusts to 65 knots. A few

cumulonimbi with maximum tops to 600. Mean storm motion vector

29035.



...Guyer

