Alert archive / Michigan / Mesoscale Discussions in 2020

Mesoscale Discussion 1680

September 6, 202016 counties in Michigan; 5 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Sep 6, 2020, 7:47 PM EDT for 16 counties in Michigan; 5 counties in Wisconsin. It was in force for 118 min.

The area

The outline as issued.

The facts

Issued: Sep 6, 2020, 7:47 PM EDT (23:47 UTC)
Expired: Sep 6, 2020, 9:45 PM EDT
In force: 118 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch possible
Chance of a watch: 40%

All 21 counties

Clare County, MI, Gladwin County, MI, Isabella County, MI, Lake County, MI, Manistee County, MI, Mason County, MI, Mecosta County, MI, Midland County, MI, Missaukee County, MI, Montcalm County, MI, Muskegon County, MI, Newaygo County, MI, Oceana County, MI, Osceola County, MI, Roscommon County, MI, Wexford County, MI, Calumet County, WI, Manitowoc County, WI, Milwaukee County, WI, Ozaukee County, WI, Sheboygan County, WI

The radar

The Green Bay radar (KGRB), 132 km from the middle of the area, began a volume at 23:47 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 488Sep 6, 9:40 PM EDT

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 6, 3:32 AM EDT	Mesoscale Discussion	SPC	Crawford, Grant, Lafayette	88 min

Nearby

Mesoscale Discussions in Michigan, 2020 Mesoscale Discussions in Wisconsin, 2020 Every mesoscale discussion in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.