Alert archive / Michigan / Heat Advisories
Heat Advisories in Michigan, 2020
4 heat advisories in 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 heat advisories reaches back to 2005.
Heat Advisories by county
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Heat Advisories
- 4
- Busiest month
- July4 heat advisories
- Busiest day
- July 7, 20201 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 |
|---|---|---|---|---|
| Jul 7, 4:03 AM EDT | Heat Advisory | DTX | Bay, Genesee, Lapeer, Lenawee, Livingston, Macomb and 7 more | 68 hr |
| Jul 17, 3:25 PM EDT | Heat Advisory | IWX | Branch, Cass, Hillsdale, Saint Joseph | 30 hr |
| Jul 18, 4:19 AM EDT | Heat Advisory | GRR | Allegan, Barry, Calhoun, Clinton, Eaton, Ingham and 6 more | 17 hr |
| Jul 19, 3:05 AM EDT | Heat Advisory | DTX | Lenawee, Livingston, Macomb, Monroe, Oakland, Saint Clair and 2 more | 10 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Lenawee County2
- Livingston County2
- Macomb County2
- Monroe County2
- Oakland County2
- Washtenaw County2
- Wayne County2
- Bay County1
- Genesee County1
- Lapeer County1
- Midland County1
- Saginaw County1
- Shiawassee County1
- Branch County1
- Cass County1
- Hillsdale County1
- Saint Joseph County1
- Allegan County1
- Barry County1
- Calhoun County1
- Clinton County1
- Eaton County1
- Ingham County1
- Ionia County1
- Jackson County1
- Kalamazoo County1
- Kent County1
- Ottawa County1
- Van Buren County1
- Saint Clair County1
The busiest days
Days with the most alerts issued, by UTC date.
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.