Alert archive / Michigan / Ottawa County
Weather alerts in Ottawa County, Michigan, 2026
113 weather alerts in 2026, 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 2026. Tap one for its archive.
- Alerts
- 113
- Warnings
- 25
- Watches
- 18
- Advisories
- 27
- Busiest month
- June21 alerts
- Busiest day
- March 11, 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 2 tornado warnings covering Ottawa County in 2026 had a tornado report inside them.
Ottawa County, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 12 | 8 | 33% | 22 | 100% | 32 min |
| Flash flood warnings | 2 | 1 | 50% | 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, 2:08 AM EST | Wind Advisory | GRR | 14 hr |
| Jan 15, 12:48 PM EST | Winter Weather Advisory | GRR | 66 hr |
| Jan 17, 3:00 PM EST | Winter Storm Watch | GRR | 13 hr |
| Jan 18, 3:51 AM EST | Winter Storm Warning | GRR | 51 hr |
| Jan 20, 2:26 PM EST | Winter Storm Warning | GRR | 21 hr |
| Jan 21, 2:28 PM EST | Winter Weather Advisory | GRR | 65 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 22, 3:36 PM EST | Extreme Cold Warning | GRR | 43 hr |
| Jan 25, 3:08 PM EST | Winter Weather Advisory | GRR | 23 hr |
| Jan 26, 1:48 PM EST | Winter Weather Advisory | GRR | 68 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 10, 1:59 PM EDT | Flood Watch | GRR | 21 hr |
| Mar 10, 6:40 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 10, 8:02 PM EDT | Severe Thunderstorm Warning | GRR | 43 min |
| Mar 10, 8:18 PM EDT | Severe Thunderstorm Warning | GRR | 42 min |
| Mar 10, 8:21 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Mar 10, 8:43 PM EDT | Areal Flood Advisory | GRR | 45 min |
| Mar 10, 8:56 PM EDT | Severe Thunderstorm Warning | GRR | 64 min |
| Mar 10, 9:28 PM EDT | Flash Flood Warning | GRR | 4 hr |
| Mar 10, 10:09 PM EDT | Flash Flood Warning | GRR | 3 hr |
| Mar 10, 10:15 PM EDT | Severe Thunderstorm Warning | GRR | 42 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 30, 11:49 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 4, 8:51 AM EDT | River Flood Watch | GRR | 8 days |
| Apr 6, 3:56 PM EDT | River Flood Warning | GRR | 7 days |
| Apr 12, 1:40 PM EDT | Flood Watch | GRR | 4 days |
| Apr 13, 8:25 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 14, 2:50 AM EDT | Mesoscale Discussion | SPC | 85 min |
| Apr 14, 3:43 AM EDT | Severe Thunderstorm Warning | GRR | 45 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, 9:17 PM EDT | Severe Thunderstorm Warning | GRR | 88 min |
| Apr 14, 10:01 PM EDT | Tornado Warning | GRR | 29 min |
| Apr 15, 11:01 PM EDT | Special Weather Statement | GRR | 89 min |
| Apr 17, 2:12 AM EDT | Dense Fog Advisory | GRR | 9 hr |
| Apr 17, 11:33 AM EDT | River Flood Warning | GRR | 21 days |
| Apr 18, 12:01 AM EDT | Special Weather Statement | GRR | 44 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 27, 1:44 PM EDT | Wind Advisory | GRR | 6 hr |
| Apr 27, 10:35 PM EDT | Special Weather Statement | GRR | 55 min |
| Apr 30, 12:45 PM EDT | Freeze Watch | GRR | 23 hr |
| May 1, 12:01 PM EDT | Freeze Warning | GRR | 21 hr |
| 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 12, 10:53 PM EDT | Special Weather Statement | GRR | 82 min |
| May 16, 3:43 AM EDT | Special Weather Statement | GRR | 92 min |
| May 16, 4:24 AM EDT | Severe Thunderstorm Warning | GRR | 24 min |
| May 17, 3:32 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| 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 20, 4:18 AM EDT | Beach Hazards Statement | GRR | 22 hr |
| May 24, 9:53 PM EDT | Dense Fog Advisory | GRR | 12 hr |
| May 27, 2:24 PM EDT | Beach Hazards Statement | GRR | 11 hr |
| Jun 4, 3:25 PM EDT | Beach Hazards Statement | GRR | 24 hr |
| Jun 10, 3:07 AM EDT | Dense Fog Advisory | GRR | 7 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, 6:02 PM EDT | Severe Thunderstorm Warning | GRR | 58 min |
| Jun 11, 4:18 AM EDT | Beach Hazards Statement | GRR | 32 hr |
| Jun 11, 8:08 PM EDT | Tornado Watch | SPC | 6 hr |
| Jun 11, 8:11 PM EDT | Severe Thunderstorm Warning | GRR | 94 min |
| Jun 11, 8:42 PM EDT | Tornado Warning | GRR | 38 min |
| Jun 12, 4:10 PM EDT | Beach Hazards Statement | GRR | 34 hr |
| Jun 14, 1:05 AM EDT | Special Weather Statement | GRR | 85 min |
| Jun 14, 4:28 AM EDT | Beach Hazards Statement | GRR | 16 hr |
| Jun 15, 11:19 AM EDT | Beach Hazards Statement | GRR | 9 hr |
| Jun 15, 9:17 PM EDT | Beach Hazards Statement | GRR | 29 hr |
| Jun 16, 4:07 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 17, 2:15 PM EDT | Beach Hazards Statement | GRR | 28 hr |
| Jun 22, 2:03 AM EDT | Beach Hazards Statement | GRR | 22 hr |
| Jun 24, 4:04 AM EDT | Beach Hazards Statement | GRR | 17 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 |
| Jun 28, 2:22 PM EDT | Beach Hazards Statement | GRR | 54 hr |
| Jul 2, 11:36 AM EDT | Heat Advisory | GRR | 31 hr |
| 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, 3:15 PM EDT | Severe Thunderstorm Warning | GRR | 90 min |
| Jul 6, 3:53 AM EDT | Beach Hazards Statement | GRR | 18 hr |
| Jul 13, 10:35 AM EDT | Heat Advisory | GRR | 57 hr |
| Jul 17, 2:00 PM EDT | Beach Hazards Statement | GRR | 38 hr |
| Jul 20, 2:39 AM EDT | Beach Hazards Statement | GRR | 67 hr |
| Jul 27, 3:50 AM EDT | Beach Hazards Statement | GRR | 46 hr |
| Jul 27, 10:40 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 27, 12:42 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 1, 7:09 PM EDT | Beach Hazards Statement | GRR | 31 hr |
| Aug 9, 1:03 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 9, 2:37 PM EDT | Severe Thunderstorm Warning | GRR | 83 min |
| Aug 13, 6:25 AM EDT | Dense Fog Advisory | GRR | 4 hr |
| Aug 21, 2:20 PM EDT | Beach Hazards Statement | GRR | 55 hr |
| Aug 25, 1:25 PM EDT | Beach Hazards Statement | GRR | 32 hr |
| Aug 26, 8:42 AM EDT | Special Weather Statement | GRR | 63 min |
| Aug 29, 1:30 PM EDT | Beach Hazards Statement | GRR | 33 hr |
| Aug 31, 2:36 AM EDT | Beach Hazards Statement | GRR | 20 hr |
| Sep 2, 2:17 AM EDT | Heat Advisory | GRR | 18 hr |
| Sep 3, 8:52 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Sep 4, 4:40 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 4, 5:52 AM EDT | Special Weather Statement | GRR | 83 min |
| Sep 8, 3:14 AM EDT | Beach Hazards Statement | GRR | 41 hr |
| Sep 12, 1:59 PM EDT | Beach Hazards Statement | GRR | 33 hr |
| Sep 14, 2:49 AM EDT | Beach Hazards Statement | GRR | 44 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.