Alert archive / Michigan / Heat Advisories
Heat Advisories in Michigan, 2021
10 heat advisories in 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 heat advisories reaches back to 2005.
Heat Advisories by county
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Heat Advisories
- 10
- Busiest month
- August10 heat advisories
- Busiest day
- August 24, 20212 heat advisories
Over time
By month
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 9, 3:29 PM EDT | Heat Advisory | IWX | Branch, Cass, Hillsdale, Saint Joseph | 29 hr |
| Aug 10, 3:27 PM EDT | Heat Advisory | IWX | Branch, Cass, Hillsdale, Saint Joseph | 29 hr |
| Aug 11, 4:04 AM EDT | Heat Advisory | DTX | Lenawee, Livingston, Macomb, Monroe, Oakland, Washtenaw and 1 more | 13 hr |
| Aug 12, 3:17 AM EDT | Heat Advisory | IWX | Branch, Cass, Hillsdale, Saint Joseph | 17 hr |
| Aug 24, 3:30 AM EDT | Heat Advisory | IWX | Branch, Cass, Hillsdale, Saint Joseph | 18 hr |
| Aug 24, 3:53 PM EDT | Heat Advisory | IWX | Branch, Cass, Hillsdale, Saint Joseph | 29 hr |
| Aug 25, 3:21 AM EDT | Heat Advisory | DTX | Lenawee, Livingston, Macomb, Monroe, Oakland, Washtenaw and 1 more | 17 hr |
| Aug 25, 3:38 AM EDT | Heat Advisory | GRR | Allegan, Barry, Calhoun, Clinton, Eaton, Ingham and 6 more | 16 hr |
| Aug 27, 3:22 PM EDT | Heat Advisory | GRR | Allegan, Barry, Calhoun, Clare, Clinton, Eaton and 17 more | 29 hr |
| Aug 28, 3:42 AM EDT | Heat Advisory | DTX | Genesee, Lapeer, Lenawee, Livingston, Macomb, Monroe and 5 more | 16 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Branch County5
- Cass County5
- Hillsdale County5
- Saint Joseph County5
- Lenawee County3
- Livingston County3
- Macomb County3
- Monroe County3
- Oakland County3
- Washtenaw County3
- Wayne County3
- Allegan County2
- Barry County2
- Calhoun County2
- Clinton County2
- Eaton County2
- Ingham County2
- Ionia County2
- Jackson County2
- Kalamazoo County2
- Kent County2
- Ottawa County2
- Van Buren County2
- Clare County1
- Gratiot County1
- Isabella County1
- Lake County1
- Mason County1
- Mecosta County1
- Montcalm County1
- Muskegon County1
- Newaygo County1
- Oceana County1
- Osceola County1
- Genesee County1
- Lapeer County1
- Saint Clair County1
- Shiawassee County1
The busiest days
Days with the most alerts issued, by UTC date.
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.