Alert archive / Michigan / Severe Thunderstorm Watches / 2021
Severe Thunderstorm Watches in Michigan, August 2021
6 severe thunderstorm watches in August 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 August 2021. Tap one for its archive.
- Severe Thunderstorm Watches
- 6
- Busiest day
- August 11, 20214 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 |
|---|---|---|---|---|
| Aug 10, 8:38 PM EDT | Severe Thunderstorm Watch | SPC | Allegan, Barry, Benzie, Berrien, Branch, Calhoun and 31 more | 5 hr |
| Aug 11, 11:50 AM EDT | Severe Thunderstorm Watch | SPC | Allegan, Barry, Berrien, Branch, Calhoun, Cass and 14 more | 4 hr |
| Aug 11, 2:32 PM EDT | Severe Thunderstorm Watch | SPC | Bay, Genesee, Huron, Lapeer, Lenawee, Livingston and 11 more | 4 hr |
| Aug 11, 4:48 PM EDT | Severe Thunderstorm Watch | SPC | Alcona, Alpena, Antrim, Arenac, Benzie, Charlevoix and 17 more | 3 hr |
| Aug 11, 9:22 PM EDT | Severe Thunderstorm Watch | SPC | Allegan, Barry, Berrien, Branch, Calhoun, Cass and 9 more | 8 hr |
| Aug 29, 1:46 PM EDT | Severe Thunderstorm Watch | SPC | Alcona, Alpena, Antrim, Arenac, Bay, Benzie and 42 more | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Allegan County3
- Barry County3
- Benzie County3
- Berrien County3
- Branch County3
- Calhoun County3
- Cass County3
- Clinton County3
- Crawford County3
- Eaton County3
- Grand Traverse County3
- Gratiot County3
- Hillsdale County3
- Ingham County3
- Ionia County3
- Jackson County3
- Kalamazoo County3
- Kalkaska County3
- Leelanau County3
- Manistee County3
- Missaukee County3
- Montcalm County3
- Muskegon County3
- Roscommon County3
- Saint Joseph County3
- Van Buren County3
- Wexford County3
- Clare County2
- Isabella County2
- Kent County2
- Lake County2
- Mason County2
- Mecosta County2
- Newaygo County2
- Oceana County2
- Osceola County2
- Ottawa County2
- Bay County2
- Genesee County2
- Huron County2
30 more counties
- Lapeer County2
- Livingston County2
- Macomb County2
- Midland County2
- Oakland County2
- Saginaw County2
- Saint Clair County2
- Sanilac County2
- Tuscola County2
- Alcona County2
- Alpena County2
- Antrim County2
- Arenac County2
- Charlevoix County2
- Cheboygan County2
- Emmet County2
- Gladwin County2
- Iosco County2
- Montmorency County2
- Ogemaw County2
- Oscoda County2
- Otsego County2
- Presque Isle County2
- Lenawee County1
- Monroe County1
- Shiawassee County1
- Washtenaw County1
- Wayne County1
- Chippewa County1
- Mackinac 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.