Alert archive / Michigan / Calhoun County
Weather alerts in Calhoun County, Michigan, 2026
121 weather alerts in 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Calhoun County and its neighbors
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Alerts
- 121
- Warnings
- 21
- Watches
- 24
- Advisories
- 30
- Busiest month
- April27 alerts
- Busiest day
- March 6, 20265 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 3 tornado warnings covering Calhoun County in 2026 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 12 minutes after it went out.
Calhoun County, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 1 | 67% | 2 | 100% | 12 min |
| Severe thunderstorm warnings | 14 | 6 | 57% | 12 | 92% | 38 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 Grand Rapids, MI: tornado warnings | 23 | 3 | 87% | 8 | 75% | 7 min |
| NWS Grand Rapids, MI: severe thunderstorm warnings | 131 | 61 | 53% | 233 | 86% | 31 min |
| NWS Grand Rapids, MI: flash flood warnings | 3 | 1 | 67% | 8 | 25% | 28 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, 12:13 AM EST | Special Weather Statement | GRR | 3 hr |
| Jan 9, 2:08 AM EST | Wind Advisory | GRR | 14 hr |
| Jan 18, 3:51 AM EST | Winter Weather Advisory | GRR | 51 hr |
| Jan 20, 2:26 PM EST | Winter Weather Advisory | GRR | 21 hr |
| Jan 21, 3:30 PM EST | Extreme Cold Watch | GRR | 11 hr |
| Jan 22, 2:43 AM EST | Cold Weather Advisory | GRR | 56 hr |
| Jan 24, 2:52 PM EST | Winter Weather Advisory | GRR | 47 hr |
| Jan 25, 3:12 PM EST | Cold Weather Advisory | GRR | 41 hr |
| Jan 29, 2:42 PM EST | Cold Weather Advisory | GRR | 19 hr |
| Feb 2, 9:58 AM EST | Winter Weather Advisory | GRR | 9 hr |
| Feb 5, 10:34 AM EST | Winter Weather Advisory | GRR | 24 hr |
| Feb 19, 1:14 PM EST | Wind Advisory | GRR | 30 hr |
| Mar 5, 8:56 AM EST | Dense Fog Advisory | GRR | 3 hr |
| Mar 6, 8:29 AM EST | Dense Fog Advisory | GRR | 5 hr |
| Mar 6, 3:10 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Mar 6, 4:22 PM EST | Severe Thunderstorm Warning | GRR | 53 min |
| Mar 6, 4:36 PM EST | Tornado Warning | GRR | 42 min |
| Mar 6, 6:02 PM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Mar 6, 7:37 PM EST | Mesoscale Discussion | SPC | 113 min |
| Mar 6, 7:59 PM EST | Severe Thunderstorm Warning | GRR | 20 min |
| Mar 10, 1:59 PM EDT | Flood Watch | GRR | 21 hr |
| Mar 10, 6:40 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 10, 8:21 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Mar 11, 12:39 AM EDT | Severe Thunderstorm Warning | GRR | 36 min |
| Mar 12, 2:45 AM EDT | High Wind Watch | GRR | 10 hr |
| Mar 12, 12:54 PM EDT | High Wind Warning | GRR | 34 hr |
| Mar 14, 1:22 PM EDT | Wind Advisory | GRR | 57 hr |
| Mar 15, 1:41 PM EDT | Winter Weather Advisory | GRR | 45 hr |
| Mar 15, 6:42 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Mar 15, 11:31 PM EDT | Special Weather Statement | GRR | 89 min |
| Mar 26, 6:01 PM EDT | Special Weather Statement | GRR | 59 min |
| Mar 30, 11:49 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 31, 12:43 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 2, 6:28 PM EDT | Tornado Watch | SPC | 3 hr |
| Apr 2, 7:35 PM EDT | Tornado Warning | GRR | 25 min |
| Apr 2, 7:50 PM EDT | Tornado Warning | GRR | 25 min |
| Apr 2, 8:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Apr 2, 8:11 PM EDT | Severe Thunderstorm Warning | GRR | 30 min |
| Apr 3, 1:19 AM EDT | Special Weather Statement | GRR | 116 min |
| Apr 12, 1:40 PM EDT | Flood Watch | GRR | 4 days |
| Apr 13, 6:11 PM EDT | Severe Thunderstorm Warning | GRR | 64 min |
| Apr 13, 8:25 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 14, 2:50 AM EDT | Mesoscale Discussion | SPC | 85 min |
| Apr 14, 5:13 AM EDT | Special Weather Statement | GRR | 92 min |
| Apr 14, 8:31 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Apr 14, 8:54 PM EDT | Tornado Watch | SPC | 6 hr |
| Apr 14, 11:51 PM EDT | Severe Thunderstorm Warning | GRR | 84 min |
| Apr 15, 12:03 AM EDT | Mesoscale Discussion | SPC | 57 min |
| Apr 16, 4:30 PM EDT | Special Weather Statement | GRR | 45 min |
| Apr 16, 4:33 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Apr 17, 2:12 AM EDT | Dense Fog Advisory | GRR | 9 hr |
| Apr 18, 1:58 AM EDT | Special Weather Statement | GRR | 92 min |
| Apr 18, 2:10 PM EDT | Frost Advisory | GRR | 17 hr |
| Apr 18, 2:10 PM EDT | Freeze Watch | GRR | 12 hr |
| Apr 19, 1:45 AM EDT | Freeze Warning | GRR | 32 hr |
| Apr 22, 12:37 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 24, 2:22 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 27, 1:44 PM EDT | Wind Advisory | GRR | 6 hr |
| Apr 27, 5:07 PM EDT | Severe Thunderstorm Warning | GRR | 83 min |
| Apr 30, 12:45 PM EDT | Freeze Watch | GRR | 23 hr |
| May 1, 12:01 PM EDT | Freeze Warning | GRR | 21 hr |
| May 2, 1:07 PM EDT | Frost Advisory | GRR | 18 hr |
| May 4, 4:42 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 4, 5:38 PM EDT | Special Weather Statement | GRR | 82 min |
| May 4, 7:28 PM EDT | Special Weather Statement | GRR | 92 min |
| May 6, 1:57 PM EDT | Frost Advisory | GRR | 18 hr |
| May 10, 1:10 PM EDT | Frost Advisory | GRR | 19 hr |
| May 11, 1:34 PM EDT | Frost Advisory | GRR | 18 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, 1:58 PM EDT | Severe Thunderstorm Warning | GRR | 79 min |
| May 18, 2:34 PM EDT | Severe Thunderstorm Warning | GRR | 70 min |
| May 18, 3:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| May 24, 9:53 PM EDT | Dense Fog Advisory | GRR | 12 hr |
| Jun 6, 1:21 AM EDT | Special Weather Statement | GRR | 114 min |
| Jun 10, 2:39 AM EDT | Heat Advisory | GRR | 17 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, 7:12 PM EDT | Severe Thunderstorm Warning | GRR | 63 min |
| Jun 10, 7:18 PM EDT | Mesoscale Discussion | SPC | 87 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, 9:46 PM EDT | Severe Thunderstorm Warning | GRR | 45 min |
| Jun 11, 11:31 PM EDT | Areal Flood Advisory | GRR | 3 hr |
| Jun 16, 1:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 16, 4:07 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 17, 3:05 AM EDT | Flood Watch | GRR | 19 hr |
| Jun 28, 2:31 AM EDT | Extreme Heat Watch | GRR | 11 hr |
| Jun 28, 1:26 PM EDT | Extreme Heat Warning | GRR | 4 days |
| Jul 2, 11:36 AM EDT | Heat Advisory | GRR | 31 hr |
| Jul 3, 12:27 AM EDT | Special Weather Statement | GRR | 93 min |
| Jul 3, 5:39 AM EDT | Special Weather Statement | GRR | 96 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, 4:04 PM EDT | Severe Thunderstorm Warning | GRR | 86 min |
| Jul 4, 1:01 AM EDT | Special Weather Statement | GRR | 59 min |
| Jul 13, 10:35 AM EDT | Heat Advisory | GRR | 57 hr |
| Jul 18, 12:37 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 18, 1:20 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 27, 12:42 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 27, 9:55 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Aug 9, 1:03 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 9, 8:34 PM EDT | Flood Watch | GRR | 11 hr |
| Aug 13, 6:25 AM EDT | Dense Fog Advisory | GRR | 4 hr |
| Aug 21, 2:50 PM EDT | Special Weather Statement | GRR | 40 min |
| Aug 21, 3:09 PM EDT | Areal Flood Advisory | GRR | 2 hr |
| Aug 21, 3:40 PM EDT | Special Weather Statement | GRR | 35 min |
| Aug 26, 1:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Aug 26, 2:22 PM EDT | Special Weather Statement | GRR | 98 min |
| Sep 2, 2:17 AM EDT | Heat Advisory | GRR | 18 hr |
| Sep 3, 1:44 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 3, 1:59 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Sep 3, 2:36 PM EDT | Severe Thunderstorm Warning | GRR | 22 min |
| Sep 3, 3:16 PM EDT | Severe Thunderstorm Warning | GRR | 19 min |
| Sep 4, 4:40 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 4, 9:49 AM EDT | Areal Flood Advisory | GRR | 3 hr |
| Sep 4, 12:02 PM EDT | Special Weather Statement | GRR | 88 min |
| Sep 4, 10:01 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 15, 8:34 AM EDT | Special Weather Statement | GRR | 56 min |
| Sep 15, 8:42 PM EDT | Special Weather Statement | GRR | 63 min |
| Sep 18, 2:42 PM EDT | Flood Watch | GRR | 36 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 | 14 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 11 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 27 |
| Special Weather Statement | 19 |
| Flooding | |
| Flood Watch | 5 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Weather Advisory | 6 |
| Heat | |
| Extreme Heat Warning | 1 |
| Extreme Heat Watch | 1 |
| Heat Advisory | 4 |
| Cold | |
| Freeze Warning | 2 |
| Extreme Cold Watch | 1 |
| Freeze Watch | 2 |
| Cold Weather Advisory | 3 |
| Frost Advisory | 5 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 4 |
| 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.