SPC Severe Thunderstorm Watch 468

WW 468 SEVERE TSTM MI 290155Z - 290600Z

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

Read more

from SPC Forecast Products http://www.spc.noaa.gov/products/watch/ww0468.html