Alert archive / Michigan / Cass County
Weather alerts in Cass County, Michigan, 2025
100 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Cass County and its neighbors
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Alerts
- 100
- Warnings
- 10
- Watches
- 15
- Advisories
- 38
- Busiest month
- June26 alerts
- Busiest day
- June 18, 20257 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 2 tornado reports fell inside a warning.
Cass County, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 2 | 0% | |||
| Severe thunderstorm warnings | 6 | 4 | 33% | 14 | 79% | 18 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Northern Indiana: tornado warnings | 14 | 4 | 71% | 16 | 25% | 7 min |
| NWS Northern Indiana: severe thunderstorm warnings | 128 | 63 | 51% | 393 | 83% | 22 min |
| NWS Northern Indiana: flash flood warnings | 3 | 1 | 67% | 6 | 33% | 52 min |
An office's figures cover every county it serves, including across state lines.
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 10, 3:19 AM EST | Winter Weather Advisory | IWX | 31 hr |
| Jan 18, 2:31 AM EST | Winter Weather Advisory | IWX | 4 days |
| Jan 18, 2:47 AM EST | Extreme Cold Watch | IWX | 24 hr |
| Jan 19, 2:30 AM EST | Cold Weather Advisory | IWX | 3 days |
| Jan 22, 2:20 AM EST | Winter Weather Advisory | IWX | 41 hr |
| Jan 31, 2:20 AM EST | Dense Fog Advisory | IWX | 8 hr |
| Jan 31, 12:07 PM EST | Areal Flood Advisory | IWX | 6 hr |
| Feb 2, 8:14 PM EST | Dense Fog Advisory | IWX | 10 hr |
| Feb 5, 2:49 AM EST | Winter Weather Advisory | IWX | 31 hr |
| Feb 10, 2:30 PM EST | Winter Storm Watch | IWX | 23 hr |
| Feb 11, 1:59 PM EST | Winter Weather Advisory | IWX | 41 hr |
| Feb 14, 2:56 PM EST | Winter Weather Advisory | IWX | 22 hr |
| Feb 15, 2:52 PM EST | Winter Weather Advisory | IWX | 28 hr |
| Feb 16, 7:11 PM EST | Winter Weather Advisory | IWX | 7 hr |
| Feb 19, 2:27 AM EST | Winter Weather Advisory | IWX | 43 hr |
| Feb 27, 2:49 PM EST | Wind Advisory | IWX | 28 hr |
| Mar 5, 4:06 AM EST | Wind Advisory | IWX | 22 hr |
| Mar 14, 1:02 AM EDT | High Wind Watch | IWX | 21 hr |
| Mar 14, 9:34 PM EDT | Wind Advisory | IWX | 22 hr |
| Mar 15, 12:57 AM EDT | Mesoscale Discussion | SPC | 63 min |
| Mar 15, 1:18 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 15, 3:44 AM EDT | Severe Thunderstorm Warning | IWX | 31 min |
| Mar 19, 6:55 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 19, 7:54 PM EDT | Severe Thunderstorm Warning | IWX | 36 min |
| Mar 30, 1:43 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 30, 2:13 PM EDT | Tornado Watch | SPC | 5 hr |
| Mar 30, 3:05 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Mar 30, 4:41 PM EDT | Severe Thunderstorm Warning | IWX | 49 min |
| Apr 2, 8:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 3, 12:49 PM EDT | River Flood Warning | IWX | 24 hr |
| Apr 18, 4:51 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Apr 26, 2:14 PM EDT | Frost Advisory | IWX | 18 hr |
| May 8, 10:29 AM EDT | Frost Advisory | IWX | 22 hr |
| May 15, 7:50 PM EDT | Mesoscale Discussion | SPC | 85 min |
| May 15, 9:30 PM EDT | Tornado Watch | SPC | 3 hr |
| May 15, 9:53 PM EDT | Severe Thunderstorm Warning | IWX | 67 min |
| May 15, 10:00 PM EDT | Mesoscale Discussion | SPC | 90 min |
| May 15, 10:54 PM EDT | Severe Thunderstorm Warning | IWX | 36 min |
| May 16, 7:23 PM EDT | Blowing Dust Advisory | IWX | 3 hr |
| Jun 9, 2:17 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jun 9, 3:10 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 9, 4:00 PM EDT | Special Weather Statement | IWX | 30 min |
| Jun 12, 6:43 PM EDT | Special Weather Statement | IWX | 32 min |
| Jun 12, 6:48 PM EDT | Special Weather Statement | GRR | 42 min |
| Jun 17, 8:17 PM EDT | Special Weather Statement | IWX | 28 min |
| Jun 17, 8:39 PM EDT | Special Weather Statement | IWX | 36 min |
| Jun 17, 9:22 PM EDT | Special Weather Statement | IWX | 23 min |
| Jun 18, 11:57 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 18, 1:01 PM EDT | Tornado Watch | SPC | 7 hr |
| Jun 18, 3:38 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 18, 4:17 PM EDT | Special Weather Statement | IWX | 58 min |
| Jun 20, 1:11 AM EDT | Extreme Heat Watch | IWX | 50 hr |
| Jun 21, 4:02 AM EDT | Heat Advisory | IWX | 23 hr |
| Jun 22, 3:30 AM EDT | Extreme Heat Warning | IWX | 65 hr |
| Jun 24, 1:36 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jun 24, 2:40 PM EDT | Special Weather Statement | IWX | 35 min |
| Jun 24, 4:01 PM EDT | Special Weather Statement | IWX | 29 min |
| Jun 24, 4:32 PM EDT | Special Weather Statement | IWX | 28 min |
| Jun 26, 3:42 AM EDT | Heat Advisory | IWX | 16 hr |
| Jun 26, 11:45 PM EDT | Special Weather Statement | IWX | 45 min |
| Jun 27, 3:09 AM EDT | Heat Advisory | IWX | 16 hr |
| Jun 27, 1:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 27, 2:00 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 30, 12:45 PM EDT | Special Weather Statement | IWX | 45 min |
| Jun 30, 12:58 PM EDT | Areal Flood Advisory | IWX | 79 min |
| Jul 6, 2:27 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Jul 16, 5:28 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jul 16, 5:49 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jul 16, 6:50 PM EDT | Special Weather Statement | IWX | 40 min |
| Jul 22, 3:12 AM EDT | Heat Advisory | IWX | 65 hr |
| Jul 24, 3:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 24, 3:31 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 24, 5:39 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 27, 1:44 AM EDT | Heat Advisory | IWX | 19 hr |
| Jul 27, 2:24 PM EDT | Heat Advisory | IWX | 31 hr |
| Jul 29, 12:27 AM EDT | Heat Advisory | IWX | 21 hr |
| Aug 12, 3:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 12, 5:59 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 16, 8:03 AM EDT | Special Weather Statement | IWX | 27 min |
| Sep 20, 6:49 PM EDT | Special Weather Statement | IWX | 26 min |
| Sep 20, 7:09 PM EDT | Special Weather Statement | GRR | 36 min |
| Sep 20, 9:15 PM EDT | Special Weather Statement | IWX | 30 min |
| Sep 20, 9:25 PM EDT | Special Weather Statement | GRR | 35 min |
| Sep 21, 7:00 PM EDT | Special Weather Statement | IWX | 30 min |
| Sep 21, 7:13 PM EDT | Severe Thunderstorm Warning | IWX | 17 min |
| Sep 23, 3:51 PM EDT | Areal Flood Advisory | IWX | 3 hr |
| Sep 26, 1:51 AM EDT | Dense Fog Advisory | IWX | 8 hr |
| Oct 8, 1:52 PM EDT | Frost Advisory | IWX | 19 hr |
| Nov 8, 2:46 AM EST | Winter Storm Watch | IWX | 24 hr |
| Nov 9, 3:03 AM EST | Winter Weather Advisory | IWX | 33 hr |
| Nov 10, 12:21 PM EST | Winter Weather Advisory | IWX | 15 hr |
| Nov 25, 10:30 AM EST | Wind Advisory | IWX | 39 hr |
| Nov 25, 2:05 PM EST | Winter Weather Advisory | IWX | 65 hr |
| Nov 27, 2:40 PM EST | Winter Storm Watch | IWX | 22 hr |
| Nov 28, 1:01 PM EST | Winter Storm Warning | IWX | 54 hr |
| Dec 27, 1:44 PM EST | Wind Advisory | IWX | 52 hr |
| Dec 27, 11:49 PM EST | Dense Fog Advisory | IWX | 5 hr |
| Dec 28, 1:24 PM EST | Areal Flood Advisory | IWX | 3 hr |
| Dec 28, 1:40 PM EST | Winter Weather Advisory | IWX | 35 hr |
| Dec 29, 7:12 AM EST | Winter Storm Warning | IWX | 18 hr |
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 | 6 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 18 |
| Special Weather Statement | 19 |
| Flooding | |
| River Flood Warning | 1 |
| Areal Flood Advisory | 4 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 13 |
| Heat | |
| Extreme Heat Warning | 1 |
| Extreme Heat Watch | 1 |
| Heat Advisory | 7 |
| Cold | |
| Extreme Cold Watch | 1 |
| Cold Weather Advisory | 1 |
| Frost Advisory | 3 |
| Wind and dust | |
| High Wind Watch | 1 |
| Blowing Dust Advisory | 1 |
| Wind Advisory | 5 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20242026
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.