Alert archive / Michigan / Ottawa County
Weather alerts in Ottawa County, Michigan, 2025
98 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Ottawa County and its neighbors
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Alerts
- 98
- Warnings
- 13
- Watches
- 9
- Advisories
- 40
- Busiest month
- May12 alerts
- Busiest day
- May 16, 20255 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 2 tornado warnings covering Ottawa County in 2025 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 22 minutes after it went out.
Ottawa County, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 1 | 50% | 1 | 100% | 22 min |
| Severe thunderstorm warnings | 6 | 2 | 67% | 9 | 78% | 40 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 Grand Rapids, MI: tornado warnings | 17 | 8 | 53% | 19 | 63% | 14 min |
| NWS Grand Rapids, MI: severe thunderstorm warnings | 58 | 31 | 47% | 151 | 82% | 33 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 2, 2:59 PM EST | Winter Weather Advisory | GRR | 34 hr |
| Jan 9, 2:51 PM EST | Winter Weather Advisory | GRR | 43 hr |
| Jan 13, 3:13 AM EST | Winter Weather Advisory | GRR | 40 hr |
| Jan 18, 2:55 AM EST | Winter Weather Advisory | GRR | 4 days |
| Jan 19, 11:53 AM EST | Cold Weather Advisory | GRR | 3 days |
| Jan 21, 3:38 PM EST | Winter Storm Warning | GRR | 36 hr |
| Jan 22, 2:44 AM EST | Winter Weather Advisory | GRR | 40 hr |
| Jan 26, 1:50 PM EST | Wind Advisory | GRR | 32 hr |
| Feb 2, 6:40 PM EST | Dense Fog Advisory | GRR | 16 hr |
| Feb 5, 3:04 AM EST | Winter Weather Advisory | GRR | 30 hr |
| Feb 5, 2:46 PM EST | Wind Advisory | GRR | 34 hr |
| Feb 10, 2:17 PM EST | Winter Storm Watch | GRR | 24 hr |
| Feb 11, 2:20 PM EST | Winter Weather Advisory | GRR | 47 hr |
| Feb 14, 3:01 AM EST | Winter Weather Advisory | GRR | 4 days |
| Feb 28, 2:50 AM EST | Wind Advisory | GRR | 19 hr |
| Mar 5, 3:08 AM EST | Wind Advisory | GRR | 28 hr |
| Mar 14, 3:34 PM EDT | Wind Advisory | GRR | 28 hr |
| Mar 19, 12:01 PM EDT | Wind Advisory | GRR | 24 hr |
| Mar 21, 3:30 AM EDT | Wind Advisory | GRR | 15 hr |
| Mar 30, 3:49 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Mar 30, 4:20 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Mar 30, 5:05 PM EDT | Severe Thunderstorm Warning | GRR | 55 min |
| Apr 2, 10:35 AM EDT | Special Weather Statement | GRR | 40 min |
| Apr 18, 8:22 AM EDT | Mesoscale Discussion | SPC | 113 min |
| Apr 18, 9:28 AM EDT | Special Weather Statement | GRR | 62 min |
| Apr 18, 9:48 AM EDT | Severe Thunderstorm Warning | GRR | 87 min |
| Apr 18, 10:36 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Apr 21, 10:17 AM EDT | Wind Advisory | GRR | 10 hr |
| Apr 26, 2:21 PM EDT | Frost Advisory | GRR | 18 hr |
| Apr 29, 8:25 AM EDT | Wind Advisory | GRR | 7 hr |
| Apr 29, 3:45 PM EDT | Frost Advisory | GRR | 16 hr |
| May 8, 10:36 AM EDT | Frost Advisory | GRR | 22 hr |
| May 15, 7:50 PM EDT | Mesoscale Discussion | SPC | 85 min |
| May 15, 8:22 PM EDT | Tornado Watch | SPC | 5 hr |
| May 15, 9:16 PM EDT | Severe Thunderstorm Warning | GRR | 89 min |
| May 15, 9:33 PM EDT | Tornado Warning | GRR | 42 min |
| May 15, 10:00 PM EDT | Mesoscale Discussion | SPC | 90 min |
| May 15, 10:02 PM EDT | Tornado Warning | GRR | 43 min |
| May 16, 8:08 PM EDT | Special Weather Statement | GRR | 67 min |
| May 16, 8:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 16, 10:04 PM EDT | Special Weather Statement | GRR | 56 min |
| May 21, 2:22 PM EDT | Beach Hazards Statement | GRR | 34 hr |
| May 31, 4:40 PM EDT | Beach Hazards Statement | GRR | 5 hr |
| Jun 2, 3:58 AM EDT | Beach Hazards Statement | GRR | 52 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, 3:58 PM EDT | Special Weather Statement | GRR | 47 min |
| Jun 9, 4:17 PM EDT | Special Weather Statement | GRR | 43 min |
| Jun 10, 3:29 PM EDT | Beach Hazards Statement | GRR | 24 hr |
| Jun 19, 8:44 AM EDT | Beach Hazards Statement | GRR | 5 hr |
| Jun 20, 2:24 AM EDT | Extreme Heat Watch | GRR | 13 hr |
| Jun 20, 3:18 PM EDT | Heat Advisory | GRR | 4 days |
| Jun 20, 3:38 PM EDT | Beach Hazards Statement | GRR | 3 days |
| Jun 26, 2:33 AM EDT | Special Weather Statement | GRR | 57 min |
| Jul 2, 4:28 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jul 4, 3:37 PM EDT | Beach Hazards Statement | GRR | 55 hr |
| Jul 7, 3:55 AM EDT | Beach Hazards Statement | GRR | 18 hr |
| Jul 9, 4:15 AM EDT | Beach Hazards Statement | GRR | 22 hr |
| Jul 16, 10:55 AM EDT | Beach Hazards Statement | GRR | 37 hr |
| Jul 19, 4:50 PM EDT | Severe Thunderstorm Warning | GRR | 25 min |
| Jul 23, 3:03 AM EDT | Heat Advisory | GRR | 40 hr |
| Jul 24, 3:31 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 28, 2:10 AM EDT | Heat Advisory | GRR | 19 hr |
| Aug 11, 10:27 AM EDT | Beach Hazards Statement | GRR | 7 hr |
| Aug 12, 9:21 AM EDT | Special Weather Statement | GRR | 54 min |
| Aug 12, 5:58 PM EDT | Areal Flood Advisory | GRR | 3 hr |
| Aug 19, 7:27 AM EDT | Beach Hazards Statement | GRR | 19 hr |
| Aug 20, 3:01 AM EDT | Beach Hazards Statement | GRR | 24 hr |
| Aug 23, 9:18 AM EDT | Beach Hazards Statement | GRR | 60 hr |
| Aug 27, 3:07 PM EDT | Beach Hazards Statement | GRR | 36 hr |
| Sep 2, 1:31 PM EDT | Beach Hazards Statement | GRR | 4 days |
| Sep 20, 7:53 PM EDT | Special Weather Statement | GRR | 37 min |
| Sep 20, 8:12 PM EDT | Severe Thunderstorm Warning | GRR | 33 min |
| Sep 24, 3:48 PM EDT | Beach Hazards Statement | GRR | 8 hr |
| Sep 26, 3:48 AM EDT | Dense Fog Advisory | GRR | 6 hr |
| Oct 4, 3:37 PM EDT | Beach Hazards Statement | GRR | 35 hr |
| Oct 6, 8:05 PM EDT | Severe Thunderstorm Warning | GRR | 55 min |
| Oct 8, 1:17 PM EDT | Frost Advisory | GRR | 20 hr |
| Nov 10, 3:32 AM EST | Winter Weather Advisory | GRR | 23 hr |
| Nov 10, 9:47 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Nov 25, 2:36 PM EST | Winter Weather Advisory | GRR | 64 hr |
| Nov 25, 2:54 PM EST | High Wind Warning | GRR | 40 hr |
| Nov 27, 6:50 AM EST | Wind Advisory | GRR | 3 hr |
| Nov 27, 2:36 PM EST | Winter Storm Watch | GRR | 25 hr |
| Nov 28, 3:09 PM EST | Winter Storm Warning | GRR | 42 hr |
| Nov 28, 3:09 PM EST | Winter Weather Advisory | GRR | 52 hr |
| Nov 30, 3:10 PM EST | Winter Storm Watch | GRR | 11 hr |
| Dec 1, 1:57 AM EST | Winter Storm Warning | GRR | 29 hr |
| Dec 1, 1:57 AM EST | Winter Weather Advisory | GRR | 29 hr |
| Dec 9, 3:15 AM EST | Winter Weather Advisory | GRR | 36 hr |
| Dec 13, 3:06 AM EST | Winter Weather Advisory | GRR | 32 hr |
| Dec 18, 2:38 AM EST | Winter Weather Advisory | GRR | 37 hr |
| Dec 19, 3:33 AM EST | Wind Advisory | GRR | 10 hr |
| Dec 20, 7:46 PM EST | Wind Advisory | GRR | 8 hr |
| Dec 25, 10:29 AM EST | Winter Weather Advisory | GRR | 27 hr |
| Dec 27, 2:45 PM EST | Winter Storm Watch | GRR | 20 hr |
| Dec 28, 10:43 AM EST | Winter Storm Warning | GRR | 37 hr |
| Dec 30, 2:43 PM EST | Winter Weather Advisory | 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 | 6 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 9 |
| Special Weather Statement | 9 |
| Flooding | |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 17 |
| Heat | |
| Extreme Heat Watch | 1 |
| Heat Advisory | 3 |
| Cold | |
| Cold Weather Advisory | 1 |
| Frost Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 12 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
| Coast and beach | |
| Beach Hazards Statement | 18 |
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.