Alert archive / Michigan / Genesee County
Weather alerts in Genesee County, Michigan, 2026
97 weather alerts in 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Genesee County and its neighbors
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Alerts
- 97
- Warnings
- 22
- Watches
- 19
- Advisories
- 22
- Busiest month
- April22 alerts
- Busiest day
- September 3, 20268 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado warnings covering Genesee County in 2026 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.
Genesee County, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 1 | 0% | |
| Severe thunderstorm warnings | 13 | 11 | 15% | 6 | 100% | 29 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Detroit, MI: tornado warnings | 26 | 8 | 69% | 11 | 82% | 23 min |
| NWS Detroit, MI: severe thunderstorm warnings | 130 | 89 | 32% | 203 | 88% | 23 min |
An office's figures cover every county it serves, including across state lines.
The year is still running; reports filed late and damage surveys can still change these figures.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
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 | Lasted |
|---|---|---|---|
| Jan 6, 2:32 PM EST | Dense Fog Advisory | DTX | 5 hr |
| Jan 9, 2:28 AM EST | Wind Advisory | DTX | 14 hr |
| Jan 18, 2:45 PM EST | Winter Weather Advisory | DTX | 43 hr |
| Jan 20, 2:29 PM EST | Winter Weather Advisory | DTX | 23 hr |
| Jan 21, 3:00 PM EST | Extreme Cold Watch | DTX | 12 hr |
| Jan 22, 2:56 AM EST | Cold Weather Advisory | DTX | 55 hr |
| Jan 22, 11:12 PM EST | Special Weather Statement | DTX | 48 min |
| Jan 25, 3:09 PM EST | Cold Weather Advisory | DTX | 43 hr |
| Jan 29, 2:17 PM EST | Cold Weather Advisory | DTX | 20 hr |
| Feb 6, 2:30 AM EST | Cold Weather Advisory | DTX | 34 hr |
| Feb 17, 3:07 AM EST | Dense Fog Advisory | DTX | 7 hr |
| Feb 18, 9:32 PM EST | Dense Fog Advisory | DTX | 14 hr |
| Feb 19, 2:56 PM EST | Wind Advisory | DTX | 29 hr |
| Mar 6, 2:00 PM EST | Special Weather Statement | DTX | 60 min |
| Mar 6, 7:45 PM EST | Special Weather Statement | DTX | 45 min |
| Mar 6, 8:31 PM EST | Special Weather Statement | DTX | 44 min |
| Mar 10, 9:58 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 12, 2:27 AM EDT | High Wind Watch | DTX | 11 hr |
| Mar 12, 1:25 PM EDT | High Wind Warning | DTX | 35 hr |
| Mar 14, 1:35 PM EDT | Wind Advisory | DTX | 62 hr |
| Mar 31, 12:43 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 31, 5:37 PM EDT | Special Weather Statement | DTX | 38 min |
| Apr 4, 1:29 PM EDT | River Flood Warning | DTX | 27 hr |
| Apr 4, 1:30 PM EDT | Flood Watch | DTX | 11 hr |
| Apr 4, 1:53 PM EDT | River Flood Warning | DTX | 36 hr |
| Apr 4, 1:55 PM EDT | River Flood Warning | DTX | 4 days |
| Apr 4, 10:26 PM EDT | River Flood Warning | DTX | 7 hr |
| Apr 13, 11:12 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 14, 9:41 AM EDT | Flood Watch | DTX | 59 hr |
| Apr 14, 8:31 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Apr 14, 8:54 PM EDT | Tornado Watch | SPC | 6 hr |
| Apr 14, 11:49 PM EDT | Severe Thunderstorm Warning | DTX | 48 min |
| Apr 15, 12:03 AM EDT | Mesoscale Discussion | SPC | 57 min |
| Apr 15, 12:10 AM EDT | Areal Flood Advisory | DTX | 3 hr |
| Apr 17, 2:46 AM EDT | Dense Fog Advisory | DTX | 7 hr |
| Apr 18, 2:21 PM EDT | Frost Advisory | DTX | 20 hr |
| Apr 18, 2:21 PM EDT | Freeze Watch | DTX | 11 hr |
| Apr 19, 1:26 AM EDT | Freeze Warning | DTX | 34 hr |
| Apr 24, 2:22 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 24, 3:43 PM EDT | Special Weather Statement | DTX | 77 min |
| Apr 27, 5:46 PM EDT | Special Weather Statement | DTX | 74 min |
| Apr 27, 7:04 PM EDT | Special Weather Statement | DTX | 71 min |
| Apr 30, 12:47 PM EDT | Frost Advisory | DTX | 19 hr |
| Apr 30, 12:47 PM EDT | Freeze Watch | DTX | 24 hr |
| May 1, 12:58 PM EDT | Freeze Warning | DTX | 18 hr |
| May 2, 1:27 PM EDT | Frost Advisory | DTX | 18 hr |
| May 4, 2:45 PM EDT | Red Flag Warning | DTX | 4 hr |
| May 6, 1:22 PM EDT | Frost Advisory | DTX | 19 hr |
| May 9, 1:11 PM EDT | Special Weather Statement | DTX | 64 min |
| May 10, 12:49 PM EDT | Frost Advisory | DTX | 18 hr |
| May 11, 2:05 PM EDT | Frost Advisory | DTX | 18 hr |
| May 16, 6:40 AM EDT | Special Weather Statement | DTX | 50 min |
| May 17, 3:32 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 18, 12:38 PM EDT | Mesoscale Discussion | SPC | 67 min |
| May 18, 12:59 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 18, 3:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| May 18, 3:53 PM EDT | Severe Thunderstorm Warning | DTX | 67 min |
| May 19, 1:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| May 19, 2:01 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 9, 1:13 PM EDT | Tornado Warning | DTX | 47 min |
| Jun 10, 7:18 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 10, 7:40 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 10, 8:54 PM EDT | Special Weather Statement | DTX | 66 min |
| Jun 10, 9:02 PM EDT | Severe Thunderstorm Warning | DTX | 58 min |
| Jun 11, 8:08 PM EDT | Tornado Watch | SPC | 6 hr |
| Jun 11, 10:46 PM EDT | Severe Thunderstorm Warning | DTX | 39 min |
| Jun 16, 1:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 16, 9:49 PM EDT | Special Weather Statement | DTX | 26 min |
| Jun 17, 2:43 AM EDT | Flood Watch | DTX | 19 hr |
| Jun 25, 3:53 PM EDT | Special Weather Statement | DTX | 52 min |
| Jun 28, 1:28 PM EDT | Extreme Heat Watch | DTX | 24 hr |
| Jun 29, 1:57 PM EDT | Extreme Heat Warning | DTX | 4 days |
| Jul 3, 2:35 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 3, 6:12 PM EDT | Severe Thunderstorm Warning | DTX | 63 min |
| Jul 4, 3:51 PM EDT | Special Weather Statement | DTX | 54 min |
| Jul 9, 7:37 PM EDT | Special Weather Statement | DTX | 53 min |
| Jul 13, 1:50 AM EDT | Extreme Heat Watch | DTX | 11 hr |
| Jul 13, 12:54 PM EDT | Heat Advisory | DTX | 55 hr |
| Jul 15, 6:52 PM EDT | Severe Thunderstorm Warning | DTX | 53 min |
| Jul 15, 7:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 18, 12:37 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 18, 1:00 PM EDT | Severe Thunderstorm Warning | DTX | 75 min |
| Jul 18, 1:20 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 12, 4:02 AM EDT | Dense Fog Advisory | DTX | 4 hr |
| Aug 12, 3:28 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 2, 5:30 AM EDT | Special Weather Statement | DTX | 60 min |
| Sep 2, 6:04 AM EDT | Severe Thunderstorm Warning | DTX | 22 min |
| Sep 2, 6:37 AM EDT | Mesoscale Discussion | SPC | 113 min |
| Sep 2, 5:20 PM EDT | Severe Thunderstorm Warning | DTX | 55 min |
| Sep 3, 8:52 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Sep 3, 9:59 AM EDT | Special Weather Statement | DTX | 61 min |
| Sep 3, 10:39 AM EDT | Severe Thunderstorm Warning | DTX | 66 min |
| Sep 3, 1:44 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 3, 1:51 PM EDT | Special Weather Statement | DTX | 39 min |
| Sep 3, 1:58 PM EDT | Severe Thunderstorm Warning | DTX | 62 min |
| Sep 3, 1:59 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Sep 3, 2:44 PM EDT | Severe Thunderstorm Warning | DTX | 48 min |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 12 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 16 |
| Special Weather Statement | 18 |
| Flooding | |
| River Flood Warning | 4 |
| Flood Watch | 3 |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Weather Advisory | 2 |
| Heat | |
| Extreme Heat Warning | 1 |
| Extreme Heat Watch | 2 |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 2 |
| Extreme Cold Watch | 1 |
| Freeze Watch | 2 |
| Cold Weather Advisory | 4 |
| Frost Advisory | 6 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 3 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive2025
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.