Alert archive / Michigan / Mesoscale Discussions / 2020
Mesoscale Discussions in Michigan, December 2020
5 mesoscale discussions in December 2020. 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 December 2020. Tap one for its archive.
- Mesoscale Discussions
- 5
- Busiest day
- December 12, 20202 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 |
|---|---|---|---|---|
| Dec 12, 10:01 AM EST | Mesoscale Discussion | SPC | Alcona, Alpena, Antrim, Benzie, Cheboygan, Crawford and 11 more | 4 hr |
| Dec 12, 1:54 PM EST | Mesoscale Discussion | SPC | Alcona, Alpena, Antrim, Cheboygan, Crawford, Kalkaska and 6 more | 4 hr |
| Dec 23, 6:15 PM EST | Mesoscale Discussion | SPC | Gogebic | 6 hr |
| Dec 29, 8:50 PM EST | Mesoscale Discussion | SPC | Allegan, Barry, Branch, Calhoun, Cass, Clare and 33 more | 4 hr |
| Dec 30, 2:15 AM EST | Mesoscale Discussion | SPC | Allegan, Barry, Berrien, Branch, Calhoun, Cass and 20 more | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Kalkaska County3
- Roscommon County3
- Alcona County2
- Alpena County2
- Antrim County2
- Cheboygan County2
- Crawford County2
- Manistee County2
- Missaukee County2
- Montmorency County2
- Oscoda County2
- Otsego County2
- Presque Isle County2
- Wexford County2
- Allegan County2
- Barry County2
- Branch County2
- Calhoun County2
- Cass County2
- Clinton County2
- Eaton County2
- Genesee County2
- Gratiot County2
- Hillsdale County2
- Ingham County2
- Ionia County2
- Jackson County2
- Kalamazoo County2
- Kent County2
- Livingston County2
- Montcalm County2
- Oakland County2
- Ottawa County2
- Saginaw County2
- Saint Joseph County2
- Shiawassee County2
- Van Buren County2
- Benzie County1
- Emmet County1
- Grand Traverse County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.