Alert archive / Michigan / Cass County
Weather alerts in Cass County, Michigan, 2026
163 weather alerts in 2026, 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 2026. Tap one for its archive.
- Alerts
- 163
- Warnings
- 43
- Watches
- 27
- Advisories
- 38
- Busiest month
- April36 alerts
- Busiest day
- March 6, 20267 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
3 of 8 tornado warnings covering Cass County in 2026 had a tornado report inside them; 2 of 4 tornado reports fell inside a warning, on average 5 minutes after it went out.
Cass County, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 8 | 3 | 63% | 4 | 50% | 5 min |
| Severe thunderstorm warnings | 25 | 11 | 56% | 21 | 62% | 23 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 Northern Indiana: tornado warnings | 48 | 14 | 71% | 53 | 57% | 11 min |
| NWS Northern Indiana: severe thunderstorm warnings | 309 | 153 | 50% | 674 | 74% | 19 min |
| NWS Northern Indiana: flash flood warnings | 14 | 7 | 50% | 43 | 56% | 115 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 9, 1:34 AM EST | Wind Advisory | IWX | 14 hr |
| Jan 13, 1:47 PM EST | Winter Storm Warning | IWX | 47 hr |
| Jan 13, 1:47 PM EST | Winter Weather Advisory | IWX | 47 hr |
| Jan 18, 3:20 AM EST | Winter Weather Advisory | IWX | 52 hr |
| Jan 19, 7:54 AM EST | Snow Squall Warning | IWX | 53 min |
| Jan 20, 2:08 PM EST | Winter Weather Advisory | IWX | 20 hr |
| Jan 22, 2:54 AM EST | Cold Weather Advisory | IWX | 55 hr |
| Jan 23, 1:57 PM EST | Winter Storm Warning | IWX | 71 hr |
| Jan 24, 5:07 AM EST | Winter Weather Advisory | IWX | 56 hr |
| Jan 25, 1:15 PM EST | Cold Weather Advisory | IWX | 45 hr |
| Jan 26, 12:53 PM EST | Winter Weather Advisory | IWX | 34 hr |
| Feb 2, 9:52 AM EST | Winter Weather Advisory | IWX | 5 hr |
| Feb 16, 2:51 AM EST | Dense Fog Advisory | IWX | 9 hr |
| Feb 19, 1:39 PM EST | Wind Advisory | IWX | 29 hr |
| Feb 21, 1:36 PM EST | Winter Weather Advisory | IWX | 50 hr |
| Mar 4, 11:18 PM EST | Dense Fog Advisory | IWX | 11 hr |
| Mar 5, 9:06 PM EST | Dense Fog Advisory | IWX | 14 hr |
| Mar 6, 3:10 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Mar 6, 3:14 PM EST | Tornado Warning | IWX | 31 min |
| Mar 6, 3:38 PM EST | Tornado Warning | IWX | 37 min |
| Mar 6, 6:02 PM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Mar 6, 6:23 PM EST | Severe Thunderstorm Warning | IWX | 37 min |
| Mar 6, 6:50 PM EST | Severe Thunderstorm Warning | IWX | 25 min |
| Mar 6, 7:37 PM EST | Mesoscale Discussion | SPC | 113 min |
| Mar 10, 1:45 PM EDT | Flood Watch | IWX | 16 hr |
| Mar 10, 5:53 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Mar 10, 7:45 PM EDT | Tornado Watch | SPC | 6 hr |
| Mar 10, 10:53 PM EDT | Severe Thunderstorm Warning | IWX | 14 min |
| Mar 10, 11:48 PM EDT | Severe Thunderstorm Warning | IWX | 42 min |
| Mar 12, 1:30 AM EDT | High Wind Watch | IWX | 11 hr |
| Mar 12, 12:43 PM EDT | High Wind Warning | IWX | 31 hr |
| Mar 14, 12:58 PM EDT | Wind Advisory | IWX | 35 hr |
| Mar 15, 1:55 AM EDT | Winter Weather Advisory | IWX | 57 hr |
| Mar 15, 6:16 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Mar 15, 6:42 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Mar 26, 3:48 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Mar 30, 11:49 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 31, 10:25 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Mar 31, 12:43 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 2, 1:55 AM EDT | Wind Advisory | IWX | 18 hr |
| Apr 2, 6:11 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Apr 2, 6:28 PM EDT | Tornado Watch | SPC | 3 hr |
| Apr 2, 6:32 PM EDT | Severe Thunderstorm Warning | IWX | 43 min |
| Apr 2, 6:40 PM EDT | Tornado Warning | IWX | 35 min |
| Apr 3, 2:17 PM EDT | Flood Watch | IWX | 27 hr |
| Apr 4, 6:08 AM EDT | Areal Flood Advisory | IWX | 4 hr |
| Apr 5, 10:29 AM EDT | River Flood Warning | IWX | 4 days |
| Apr 13, 3:06 PM EDT | Mesoscale Discussion | SPC | 24 min |
| Apr 13, 3:09 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 13, 4:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Apr 13, 5:07 PM EDT | Special Weather Statement | IWX | 23 min |
| Apr 13, 5:26 PM EDT | Special Weather Statement | IWX | 49 min |
| Apr 13, 5:44 PM EDT | Severe Thunderstorm Warning | IWX | 38 min |
| Apr 14, 4:41 AM EDT | Special Weather Statement | IWX | 64 min |
| Apr 14, 5:21 AM EDT | Special Weather Statement | IWX | 54 min |
| Apr 14, 1:19 PM EDT | Flood Watch | IWX | 43 hr |
| Apr 14, 8:54 PM EDT | Tornado Watch | SPC | 6 hr |
| Apr 15, 12:25 AM EDT | Severe Thunderstorm Warning | IWX | 50 min |
| Apr 15, 1:26 AM EDT | Areal Flood Advisory | IWX | 4 hr |
| Apr 15, 2:58 AM EDT | Special Weather Statement | IWX | 32 min |
| Apr 15, 10:35 PM EDT | River Flood Warning | IWX | 21 days |
| Apr 15, 10:35 PM EDT | River Flood Warning | IWX | 21 days |
| Apr 16, 2:52 PM EDT | Special Weather Statement | IWX | 23 min |
| Apr 16, 4:33 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Apr 16, 10:31 PM EDT | Dense Fog Advisory | IWX | 9 hr |
| Apr 17, 10:44 PM EDT | Tornado Watch | SPC | 3 hr |
| Apr 18, 12:26 AM EDT | Severe Thunderstorm Warning | IWX | 47 min |
| Apr 18, 12:42 AM EDT | Tornado Warning | IWX | 33 min |
| Apr 18, 12:59 AM EDT | Severe Thunderstorm Warning | IWX | 46 min |
| Apr 18, 1:56 PM EDT | Frost Advisory | IWX | 19 hr |
| Apr 18, 1:56 PM EDT | Freeze Watch | IWX | 12 hr |
| Apr 19, 1:34 AM EDT | Freeze Warning | IWX | 31 hr |
| Apr 21, 2:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Apr 22, 12:37 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 27, 1:34 PM EDT | Wind Advisory | IWX | 12 hr |
| May 1, 3:03 AM EDT | Freeze Watch | IWX | 9 hr |
| May 1, 11:53 AM EDT | Freeze Warning | IWX | 21 hr |
| May 4, 4:42 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 4, 5:30 PM EDT | Special Weather Statement | IWX | 30 min |
| May 4, 6:19 PM EDT | Special Weather Statement | IWX | 41 min |
| May 4, 7:14 PM EDT | Special Weather Statement | IWX | 46 min |
| May 4, 7:25 PM EDT | Severe Thunderstorm Warning | IWX | 10 min |
| May 4, 9:21 PM EDT | Special Weather Statement | IWX | 24 min |
| May 6, 2:51 PM EDT | Frost Advisory | IWX | 17 hr |
| May 11, 1:36 PM EDT | Frost Advisory | IWX | 18 hr |
| May 18, 11:02 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 18, 12:38 PM EDT | Mesoscale Discussion | SPC | 67 min |
| May 18, 1:15 PM EDT | Severe Thunderstorm Warning | IWX | 45 min |
| May 18, 1:44 PM EDT | Severe Thunderstorm Warning | IWX | 46 min |
| May 24, 11:34 PM EDT | Dense Fog Advisory | IWX | 9 hr |
| Jun 9, 2:08 PM EDT | Heat Advisory | IWX | 30 hr |
| Jun 10, 4:58 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 10, 5:41 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 10, 5:43 PM EDT | Severe Thunderstorm Warning | IWX | 62 min |
| Jun 10, 6:08 PM EDT | Severe Thunderstorm Warning | IWX | 37 min |
| Jun 10, 6:44 PM EDT | Special Weather Statement | IWX | 31 min |
| Jun 11, 1:49 AM EDT | Heat Advisory | IWX | 16 hr |
| Jun 11, 4:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 11, 7:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 11, 8:08 PM EDT | Tornado Watch | SPC | 6 hr |
| Jun 11, 8:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jun 11, 10:00 PM EDT | Severe Thunderstorm Warning | IWX | 45 min |
| Jun 11, 10:13 PM EDT | Tornado Warning | IWX | 47 min |
| Jun 11, 10:42 PM EDT | Tornado Warning | IWX | 48 min |
| Jun 16, 1:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 16, 4:07 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 16, 5:53 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 16, 6:29 PM EDT | Tornado Warning | IWX | 46 min |
| Jun 16, 7:06 PM EDT | Severe Thunderstorm Warning | IWX | 39 min |
| Jun 17, 2:37 AM EDT | Flood Watch | IWX | 19 hr |
| Jun 17, 2:16 PM EDT | Wind Advisory | IWX | 5 hr |
| Jun 17, 7:22 PM EDT | Areal Flood Advisory | IWX | 113 min |
| Jun 22, 12:48 AM EDT | Areal Flood Advisory | IWX | 5 hr |
| Jun 28, 2:16 AM EDT | Extreme Heat Watch | IWX | 11 hr |
| Jun 28, 1:29 PM EDT | Extreme Heat Warning | IWX | 5 days |
| Jul 2, 11:33 AM EDT | Heat Advisory | IWX | 55 hr |
| Jul 3, 12:43 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 4:02 AM EDT | Special Weather Statement | IWX | 58 min |
| Jul 3, 2:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 3, 2:35 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 3, 3:13 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jul 3, 3:47 PM EDT | Severe Thunderstorm Warning | IWX | 73 min |
| Jul 3, 10:29 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 10:36 PM EDT | Special Weather Statement | IWX | 54 min |
| Jul 3, 11:26 PM EDT | Areal Flood Advisory | IWX | 3 hr |
| Jul 13, 12:57 PM EDT | Heat Advisory | IWX | 31 hr |
| Jul 14, 12:45 PM EDT | Heat Advisory | IWX | 31 hr |
| Jul 18, 12:32 PM EDT | Special Weather Statement | IWX | 28 min |
| Jul 18, 12:37 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 27, 8:08 AM EDT | Special Weather Statement | IWX | 52 min |
| Jul 27, 8:47 AM EDT | Severe Thunderstorm Warning | IWX | 32 min |
| Jul 27, 8:52 AM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 27, 10:40 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 27, 12:42 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 27, 2:56 PM EDT | Severe Thunderstorm Warning | IWX | 49 min |
| Jul 27, 9:55 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Aug 7, 5:06 AM EDT | Dense Fog Advisory | IWX | 4 hr |
| Aug 9, 12:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Aug 9, 1:03 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 9, 2:57 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Aug 9, 3:24 PM EDT | Severe Thunderstorm Warning | IWX | 66 min |
| Aug 9, 4:40 PM EDT | Severe Thunderstorm Warning | IWX | 65 min |
| Aug 9, 5:17 PM EDT | Areal Flood Advisory | IWX | 118 min |
| Aug 9, 5:34 PM EDT | Severe Thunderstorm Warning | IWX | 41 min |
| Aug 9, 8:27 PM EDT | Flood Watch | IWX | 11 hr |
| Aug 10, 1:45 AM EDT | Special Weather Statement | IWX | 45 min |
| Aug 10, 2:09 AM EDT | Special Weather Statement | IWX | 36 min |
| Aug 10, 2:16 AM EDT | Severe Thunderstorm Warning | IWX | 29 min |
| Aug 10, 7:21 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 11, 2:46 AM EDT | Severe Thunderstorm Warning | IWX | 29 min |
| Aug 11, 3:50 AM EDT | Special Weather Statement | IWX | 25 min |
| Aug 11, 4:07 AM EDT | Special Weather Statement | IWX | 23 min |
| Aug 11, 6:40 AM EDT | Severe Thunderstorm Warning | IWX | 35 min |
| Aug 11, 11:01 AM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Aug 11, 12:34 PM EDT | Tornado Warning | IWX | 56 min |
| Aug 18, 11:20 PM EDT | Special Weather Statement | IWX | 40 min |
| Aug 26, 1:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Aug 31, 1:00 PM EDT | Heat Advisory | IWX | 4 days |
| Sep 3, 1:41 AM EDT | Heat Advisory | IWX | 18 hr |
| Sep 4, 4:40 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 4, 10:01 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 5, 1:41 AM EDT | Mesoscale Discussion | SPC | 94 min |
| Sep 18, 3:20 PM EDT | Flood Watch | IWX | 47 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
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.