Alert archive / Michigan / Severe Thunderstorm Watches / 2021
Severe Thunderstorm Watches in Michigan, September 2021
5 severe thunderstorm watches 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 severe thunderstorm watches reaches back to 1997.
Severe Thunderstorm Watches by county
Each county as a circle sized by its count in September 2021. Tap one for its archive.
- Severe Thunderstorm Watches
- 5
- Busiest day
- September 7, 20212 severe thunderstorm watches
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, 12:21 PM EDT | Severe Thunderstorm Watch | SPC | Alcona, Arenac, Bay, Clare, Crawford, Gladwin and 20 more | 6 hr |
| Sep 7, 3:20 PM EDT | Severe Thunderstorm Watch | SPC | Allegan, Barry, Berrien, Branch, Calhoun, Cass and 24 more | 7 hr |
| Sep 12, 5:15 PM EDT | Severe Thunderstorm Watch | SPC | Allegan, Barry, Clinton, Eaton, Gratiot, Ingham and 5 more | 3 hr |
| Sep 12, 5:22 PM EDT | Severe Thunderstorm Watch | SPC | Genesee, Lapeer, Livingston, Macomb, Oakland, Saginaw and 4 more | 4 hr |
| Sep 14, 3:08 PM EDT | Severe Thunderstorm Watch | SPC | Alcona, Allegan, Arenac, Barry, Bay, Berrien and 36 more | 7 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Gratiot County3
- Kent County3
- Montcalm County3
- Ottawa County3
- Allegan County3
- Barry County3
- Clinton County3
- Eaton County3
- Genesee County3
- Ingham County3
- Ionia County3
- Lapeer County3
- Livingston County3
- Macomb County3
- Oakland County3
- Saginaw County3
- Saint Clair County3
- Sanilac County3
- Shiawassee County3
- Tuscola County3
- Alcona County2
- Arenac County2
- Bay County2
- Gladwin County2
- Iosco County2
- Isabella County2
- Midland County2
- Muskegon County2
- Ogemaw County2
- Berrien County2
- Branch County2
- Calhoun County2
- Cass County2
- Hillsdale County2
- Huron County2
- Jackson County2
- Kalamazoo County2
- Lenawee County2
- Monroe County2
- Saint Joseph County2
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.