Alert archive / Michigan / Mesoscale Discussions / 2021
Mesoscale Discussions in Michigan, September 2021
15 mesoscale discussions in September 2021. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of mesoscale discussions reaches back to 2003.
Mesoscale Discussions by county
Each county as a circle sized by its count in September 2021. Tap one for its archive.
- Mesoscale Discussions
- 15
- Busiest day
- September 7, 20217 mesoscale discussions
Over time
By day
Days in UTC, the clock the archive keeps.
The alerts
Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 3:40 AM EDT | Mesoscale Discussion | SPC | Baraga, Gogebic, Houghton, Iron, Ontonagon | 3 hr |
| Sep 7, 8:05 AM EDT | Mesoscale Discussion | SPC | Antrim, Benzie, Cheboygan, Emmet, Grand Traverse, Kalkaska and 1 more | 115 min |
| Sep 7, 10:15 AM EDT | Mesoscale Discussion | SPC | Antrim, Benzie, Crawford, Grand Traverse, Kalkaska, Lake and 10 more | 90 min |
| Sep 7, 11:47 AM EDT | Mesoscale Discussion | SPC | Clare, Gladwin, Isabella, Lake, Manistee, Mason and 10 more | 58 min |
| Sep 7, 1:49 PM EDT | Mesoscale Discussion | SPC | Gratiot, Isabella, Mecosta, Montcalm, Muskegon, Newaygo and 2 more | 86 min |
| Sep 7, 2:48 PM EDT | Mesoscale Discussion | SPC | Barry, Branch, Calhoun, Cass, Eaton, Genesee and 14 more | 117 min |
| Sep 7, 5:37 PM EDT | Mesoscale Discussion | SPC | Allegan, Barry, Berrien, Branch, Calhoun, Cass and 23 more | 83 min |
| Sep 7, 8:16 PM EDT | Mesoscale Discussion | SPC | Hillsdale, Jackson, Lenawee, Monroe, Washtenaw, Wayne | 89 min |
| Sep 12, 2:43 PM EDT | Mesoscale Discussion | SPC | Arenac, Bay, Clare, Genesee, Gladwin, Gratiot and 20 more | 92 min |
| Sep 12, 4:44 PM EDT | Mesoscale Discussion | SPC | Kent, Muskegon, Ottawa | 91 min |
| Sep 12, 6:52 PM EDT | Mesoscale Discussion | SPC | Clinton, Genesee, Gratiot, Ionia, Kent, Lapeer and 7 more | 113 min |
| Sep 13, 10:52 AM EDT | Mesoscale Discussion | SPC | Barry, Clinton, Gratiot, Ionia, Kent, Montcalm and 2 more | 83 min |
| Sep 14, 2:12 PM EDT | Mesoscale Discussion | SPC | Barry, Bay, Branch, Calhoun, Cass, Clinton and 18 more | 2 hr |
| Sep 14, 6:04 PM EDT | Mesoscale Discussion | SPC | Branch, Calhoun, Eaton, Genesee, Hillsdale, Ingham and 14 more | 86 min |
| Sep 14, 7:46 PM EDT | Mesoscale Discussion | SPC | Lenawee, Macomb, Monroe, Washtenaw, Wayne | 89 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Gratiot County6
- Genesee County6
- Lapeer County6
- Lenawee County6
- Shiawassee County6
- Washtenaw County6
- Muskegon County5
- Hillsdale County5
- Jackson County5
- Livingston County5
- Macomb County5
- Oakland County5
- Wayne County5
- Ottawa County4
- Montcalm County4
- Barry County4
- Branch County4
- Calhoun County4
- Eaton County4
- Ingham County4
- Saint Clair County4
- Saint Joseph County4
- Clinton County4
- Ionia County4
- Monroe County4
- Saginaw County4
- Tuscola County4
- Lake County3
- Manistee County3
- Mason County3
- Missaukee County3
- Ogemaw County3
- Osceola County3
- Roscommon County3
- Wexford County3
- Isabella County3
- Mecosta County3
- Newaygo County3
- Oceana County3
- Cass County3
28 more counties
- Kalamazoo County3
- Kent County3
- Antrim County2
- Benzie County2
- Grand Traverse County2
- Kalkaska County2
- Clare County2
- Gladwin County2
- Bay County2
- Midland County2
- Baraga County1
- Gogebic County1
- Houghton County1
- Iron County1
- Ontonagon County1
- Cheboygan County1
- Emmet County1
- Leelanau County1
- Crawford County1
- Montmorency County1
- Oscoda County1
- Otsego County1
- Allegan County1
- Berrien County1
- Van Buren County1
- Arenac County1
- Huron County1
- Sanilac County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.