Alert archive / Michigan / Ottawa County
Weather alerts in Ottawa County, Michigan, 2023
105 weather alerts in 2023, 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 2023. Tap one for its archive.
- Alerts
- 105
- Warnings
- 14
- Watches
- 14
- Advisories
- 32
- Busiest month
- April22 alerts
- Busiest day
- April 1, 20234 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Ottawa County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 3 | 1 | 67% | 2 | 0% | |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Grand Rapids, MI: tornado warnings | 5 | 1 | 80% | 4 | 25% | 10 min |
| NWS Grand Rapids, MI: severe thunderstorm warnings | 82 | 51 | 38% | 164 | 83% | 22 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, 3:55 AM EST | Dense Fog Advisory | GRR | 8 hr |
| Jan 3, 10:36 PM EST | Special Weather Statement | GRR | 84 min |
| Jan 25, 3:55 PM EST | Winter Weather Advisory | GRR | 33 hr |
| Jan 27, 3:41 AM EST | Winter Weather Advisory | GRR | 16 hr |
| Jan 27, 9:01 PM EST | Winter Weather Advisory | GRR | 34 hr |
| Jan 28, 2:16 PM EST | Winter Storm Warning | GRR | 17 hr |
| Jan 28, 9:28 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 2, 12:55 PM EST | Winter Weather Advisory | GRR | 26 hr |
| Feb 8, 3:03 PM EST | Wind Advisory | GRR | 32 hr |
| Feb 14, 3:51 AM EST | Wind Advisory | GRR | 36 hr |
| Feb 15, 3:33 PM EST | Winter Weather Advisory | GRR | 39 hr |
| Feb 20, 3:52 PM EST | Winter Storm Watch | GRR | 23 hr |
| Feb 21, 2:42 PM EST | Winter Storm Warning | GRR | 43 hr |
| Feb 22, 9:46 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 22, 4:27 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 26, 10:52 AM EST | Winter Weather Advisory | GRR | 35 hr |
| Mar 2, 3:53 AM EST | Winter Storm Watch | GRR | 18 hr |
| Mar 2, 9:46 PM EST | Winter Weather Advisory | GRR | 25 hr |
| Mar 9, 3:25 AM EST | Winter Weather Advisory | GRR | 32 hr |
| Mar 12, 3:48 PM EDT | Winter Weather Advisory | GRR | 21 hr |
| Mar 17, 3:43 AM EDT | Winter Weather Advisory | GRR | 46 hr |
| Mar 31, 10:31 PM EDT | Areal Flood Advisory | GRR | 7 hr |
| Mar 31, 10:34 PM EDT | Areal Flood Advisory | GRR | 6 hr |
| Mar 31, 10:34 PM EDT | Special Weather Statement | GRR | 56 min |
| Mar 31, 10:52 PM EDT | Areal Flood Advisory | GRR | 6 hr |
| Apr 3, 3:33 PM EDT | Flood Watch | GRR | 15 hr |
| Apr 4, 1:24 PM EDT | Flood Watch | GRR | 20 hr |
| Apr 5, 7:46 AM EDT | Special Weather Statement | GRR | 59 min |
| Apr 5, 8:41 AM EDT | Tornado Watch | SPC | 7 hr |
| Apr 5, 9:12 AM EDT | Areal Flood Advisory | GRR | 6 hr |
| Apr 5, 11:54 AM EDT | River Flood Warning | GRR | 8 days |
| Apr 11, 3:42 PM EDT | Fire Weather Watch | GRR | 13 hr |
| Apr 12, 5:05 AM EDT | Red Flag Warning | GRR | 15 hr |
| Apr 13, 8:47 AM EDT | Red Flag Warning | GRR | 11 hr |
| Apr 18, 1:51 PM EDT | Freeze Warning | GRR | 19 hr |
| Apr 19, 8:17 PM EDT | Special Weather Statement | GRR | 58 min |
| Apr 19, 8:42 PM EDT | Areal Flood Advisory | GRR | 85 min |
| Apr 20, 7:31 PM EDT | Special Weather Statement | GRR | 59 min |
| Apr 20, 8:11 PM EDT | Special Weather Statement | GRR | 94 min |
| Apr 20, 8:38 PM EDT | Severe Thunderstorm Warning | GRR | 67 min |
| Apr 23, 2:53 PM EDT | Freeze Warning | GRR | 16 hr |
| Apr 25, 10:30 AM EDT | Freeze Warning | GRR | 22 hr |
| Apr 26, 10:34 AM EDT | Freeze Warning | GRR | 22 hr |
| May 3, 3:27 PM EDT | Frost Advisory | GRR | 18 hr |
| May 24, 3:40 AM EDT | Frost Advisory | GRR | 27 hr |
| May 25, 2:04 PM EDT | Frost Advisory | GRR | 18 hr |
| Jun 3, 3:48 PM EDT | Fire Weather Watch | GRR | 12 hr |
| Jun 4, 3:33 AM EDT | Red Flag Warning | GRR | 17 hr |
| Jun 6, 4:12 AM EDT | Beach Hazards Statement | GRR | 19 hr |
| Jun 7, 3:59 AM EDT | Beach Hazards Statement | GRR | 19 hr |
| Jun 8, 9:06 AM EDT | Beach Hazards Statement | GRR | 12 hr |
| Jun 10, 2:40 PM EDT | Beach Hazards Statement | GRR | 49 hr |
| Jun 14, 3:04 PM EDT | Beach Hazards Statement | GRR | 38 hr |
| Jun 25, 1:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 1:53 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 26, 3:34 AM EDT | Beach Hazards Statement | GRR | 43 hr |
| Jun 29, 5:02 PM EDT | Special Weather Statement | GRR | 88 min |
| Jun 30, 5:52 AM EDT | Dense Fog Advisory | GRR | 4 hr |
| Jul 5, 1:03 PM EDT | Beach Hazards Statement | GRR | 34 hr |
| Jul 9, 12:37 PM EDT | Beach Hazards Statement | GRR | 42 hr |
| Jul 11, 10:51 AM EDT | Beach Hazards Statement | GRR | 10 hr |
| Jul 12, 11:59 AM EDT | Flood Watch | GRR | 12 hr |
| Jul 12, 8:41 PM EDT | Areal Flood Advisory | GRR | 3 hr |
| Jul 14, 10:29 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 17, 12:59 AM EDT | Special Weather Statement | GRR | 91 min |
| Jul 19, 2:44 PM EDT | Beach Hazards Statement | GRR | 51 hr |
| Jul 20, 10:38 AM EDT | Mesoscale Discussion | SPC | 97 min |
| Jul 20, 12:16 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 26, 9:45 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 26, 10:03 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 26, 2:04 PM EDT | Special Weather Statement | GRR | 56 min |
| Jul 26, 2:31 PM EDT | Severe Thunderstorm Warning | GRR | 44 min |
| Jul 28, 10:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 28, 11:58 PM EDT | Special Weather Statement | GRR | 62 min |
| Jul 29, 12:00 AM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 29, 1:59 AM EDT | Areal Flood Advisory | GRR | 6 hr |
| Aug 3, 2:46 PM EDT | Beach Hazards Statement | GRR | 34 hr |
| Aug 7, 5:05 AM EDT | Beach Hazards Statement | GRR | 17 hr |
| Aug 12, 7:07 AM EDT | Beach Hazards Statement | GRR | 7 hr |
| Aug 14, 12:09 PM EDT | Flood Watch | GRR | 24 hr |
| Aug 14, 2:52 PM EDT | Beach Hazards Statement | GRR | 29 hr |
| Aug 14, 9:22 PM EDT | Areal Flood Warning | GRR | 11 hr |
| Aug 16, 3:51 AM EDT | Beach Hazards Statement | GRR | 55 hr |
| Aug 17, 5:41 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 18, 2:47 PM EDT | Beach Hazards Statement | GRR | 42 hr |
| Aug 22, 4:12 AM EDT | Heat Advisory | GRR | 65 hr |
| Aug 22, 4:44 PM EDT | Beach Hazards Statement | GRR | 28 hr |
| Aug 24, 4:44 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 24, 6:35 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 24, 8:07 PM EDT | Severe Thunderstorm Warning | GRR | 53 min |
| Aug 24, 8:08 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Aug 25, 3:32 PM EDT | Beach Hazards Statement | GRR | 33 hr |
| Aug 28, 3:26 PM EDT | Beach Hazards Statement | GRR | 50 hr |
| Aug 30, 5:20 PM EDT | Beach Hazards Statement | GRR | 5 hr |
| Sep 1, 3:42 PM EDT | Beach Hazards Statement | GRR | 60 hr |
| Sep 4, 3:50 PM EDT | Beach Hazards Statement | GRR | 4 days |
| Sep 11, 3:49 PM EDT | Beach Hazards Statement | GRR | 32 hr |
| Sep 29, 10:36 PM EDT | Dense Fog Advisory | GRR | 11 hr |
| Oct 6, 9:58 PM EDT | Special Weather Statement | GRR | 2 hr |
| Oct 31, 3:59 AM EDT | Winter Weather Advisory | GRR | 18 hr |
| Nov 25, 3:43 PM EST | Winter Weather Advisory | GRR | 36 hr |
| Dec 9, 3:04 AM EST | Wind Advisory | GRR | 11 hr |
| Dec 17, 4:39 AM EST | Winter Weather Advisory | GRR | 45 hr |
| Dec 23, 9:22 AM EST | Dense Fog Advisory | GRR | 5 hr |
| Dec 23, 8:23 PM EST | Dense Fog Advisory | GRR | 15 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 | 3 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 11 |
| Special Weather Statement | 11 |
| Flooding | |
| Areal Flood Warning | 1 |
| River Flood Warning | 1 |
| Flood Watch | 4 |
| Areal Flood Advisory | 7 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 13 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 4 |
| Frost Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fire | |
| Red Flag Warning | 3 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
| Coast and beach | |
| Beach Hazards Statement | 23 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20222024
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.