Alert archive / Michigan / Ottawa County
Weather alerts in Ottawa County, Michigan, 2019
151 weather alerts in 2019, 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 2019. Tap one for its archive.
- Alerts
- 151
- Warnings
- 21
- Watches
- 15
- Advisories
- 65
- Busiest month
- July23 alerts
- Busiest day
- July 20, 20196 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, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 7 | 4 | 43% | 8 | 75% | 26 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Grand Rapids, MI: tornado warnings | 5 | 0 | 100% | 1 | 0% | |
| NWS Grand Rapids, MI: severe thunderstorm warnings | 72 | 37 | 49% | 146 | 68% | 23 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, 3:24 AM EST | Winter Weather Advisory | GRR | 18 hr |
| Jan 5, 3:38 AM EST | Dense Fog Advisory | GRR | 6 hr |
| Jan 6, 3:25 AM EST | Winter Weather Advisory | GRR | 37 hr |
| Jan 8, 3:33 AM EST | Winter Weather Advisory | GRR | 36 hr |
| Jan 14, 3:15 PM EST | Winter Weather Advisory | GRR | 12 hr |
| Jan 15, 5:52 AM EST | Winter Weather Advisory | GRR | 28 hr |
| Jan 18, 3:21 AM EST | Winter Weather Advisory | GRR | 36 hr |
| Jan 19, 3:27 PM EST | Wind Chill Advisory | GRR | 19 hr |
| Jan 20, 10:45 AM EST | Wind Chill Advisory | GRR | 25 hr |
| Jan 21, 3:25 PM EST | Winter Weather Advisory | GRR | 47 hr |
| Jan 23, 3:24 PM EST | Winter Weather Advisory | GRR | 59 hr |
| Jan 26, 4:10 AM EST | Winter Weather Advisory | GRR | 21 hr |
| Jan 26, 3:18 PM EST | Winter Storm Watch | GRR | 12 hr |
| Jan 27, 3:21 AM EST | Winter Storm Warning | GRR | 5 days |
| Jan 28, 3:42 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 28, 8:18 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 2, 2:44 PM EST | Dense Fog Advisory | GRR | 15 hr |
| Feb 3, 5:49 PM EST | Dense Fog Advisory | GRR | 16 hr |
| Feb 4, 3:43 PM EST | Winter Weather Advisory | GRR | 4 days |
| Feb 5, 9:54 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 8, 10:38 AM EST | River Flood Warning | GRR | 6 days |
| Feb 10, 3:30 PM EST | Winter Weather Advisory | GRR | 70 hr |
| Feb 12, 2:40 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 17, 9:31 AM EST | Winter Weather Advisory | GRR | 17 hr |
| Feb 19, 2:36 PM EST | Winter Weather Advisory | GRR | 31 hr |
| Feb 21, 3:25 PM EST | Winter Storm Watch | GRR | 48 hr |
| Feb 23, 11:25 AM EST | Lakeshore Flood Statement | GRR | 40 hr |
| Feb 23, 3:38 PM EST | High Wind Warning | GRR | 36 hr |
| Feb 24, 2:05 AM EST | Special Weather Statement | GRR | 115 min |
| Feb 26, 3:14 AM EST | Winter Weather Advisory | GRR | 34 hr |
| Feb 28, 9:45 AM EST | River Flood Warning | GRR | 29 hr |
| Mar 4, 3:04 AM EST | Winter Weather Advisory | GRR | 3 days |
| Mar 10, 3:14 AM EDT | Wind Advisory | GRR | 17 hr |
| Mar 13, 12:21 PM EDT | River Flood Watch | GRR | 7 days |
| Mar 14, 9:48 AM EDT | Wind Advisory | GRR | 13 hr |
| Mar 14, 11:01 PM EDT | River Flood Warning | GRR | 7 days |
| Apr 10, 3:45 AM EDT | Winter Weather Advisory | GRR | 28 hr |
| Apr 13, 3:22 PM EDT | Winter Weather Advisory | GRR | 36 hr |
| Apr 22, 9:58 AM EDT | Red Flag Warning | GRR | 10 hr |
| Apr 23, 3:49 PM EDT | Frost Advisory | GRR | 16 hr |
| Apr 26, 3:39 AM EDT | Wind Advisory | GRR | 17 hr |
| Apr 26, 3:20 PM EDT | Winter Weather Advisory | GRR | 38 hr |
| May 10, 3:33 AM EDT | Frost Advisory | GRR | 28 hr |
| May 19, 4:26 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 25, 2:50 AM EDT | Areal Flood Advisory | GRR | 9 hr |
| Jun 1, 6:46 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 1, 7:09 PM EDT | Severe Thunderstorm Warning | GRR | 66 min |
| Jun 5, 3:09 AM EDT | Special Weather Statement | GRR | 96 min |
| Jun 8, 3:34 PM EDT | Lakeshore Flood Watch | GRR | 20 hr |
| Jun 9, 11:22 AM EDT | Beach Hazards Statement | GRR | 31 hr |
| Jun 9, 11:22 AM EDT | Lakeshore Flood Advisory | GRR | 31 hr |
| Jun 12, 3:46 PM EDT | Beach Hazards Statement | GRR | 28 hr |
| Jun 12, 3:46 PM EDT | Lakeshore Flood Advisory | GRR | 28 hr |
| Jun 14, 3:23 AM EDT | Beach Hazards Statement | GRR | 19 hr |
| Jun 24, 2:52 PM EDT | Beach Hazards Statement | GRR | 20 hr |
| Jun 25, 2:52 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 2, 7:47 AM EDT | Severe Thunderstorm Warning | GRR | 43 min |
| Jul 2, 3:31 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jul 2, 5:56 PM EDT | Severe Thunderstorm Warning | GRR | 49 min |
| Jul 2, 5:56 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jul 2, 6:40 PM EDT | Severe Thunderstorm Warning | GRR | 35 min |
| Jul 6, 3:36 PM EDT | Beach Hazards Statement | GRR | 10 hr |
| Jul 10, 4:03 PM EDT | Beach Hazards Statement | GRR | 31 hr |
| Jul 17, 3:37 PM EDT | Beach Hazards Statement | GRR | 52 hr |
| Jul 18, 3:27 AM EDT | Excessive Heat Warning | GRR | 65 hr |
| Jul 20, 1:08 AM EDT | Special Weather Statement | GRR | 82 min |
| Jul 20, 1:24 AM EDT | Severe Thunderstorm Warning | GRR | 51 min |
| Jul 20, 1:50 AM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 20, 11:08 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 20, 2:15 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 20, 3:11 PM EDT | Severe Thunderstorm Warning | GRR | 49 min |
| Jul 21, 3:53 PM EDT | Beach Hazards Statement | GRR | 36 hr |
| Jul 21, 3:53 PM EDT | Lakeshore Flood Statement | GRR | 8 hr |
| Jul 22, 3:56 AM EDT | Lakeshore Flood Advisory | GRR | 23 hr |
| Jul 26, 3:43 AM EDT | Beach Hazards Statement | GRR | 44 hr |
| Jul 26, 10:47 AM EDT | Lakeshore Flood Advisory | GRR | 37 hr |
| Jul 28, 3:05 AM EDT | Beach Hazards Statement | GRR | 41 hr |
| Jul 29, 1:30 PM EDT | Special Weather Statement | GRR | 75 min |
| Jul 30, 10:19 AM EDT | Beach Hazards Statement | GRR | 13 hr |
| Aug 5, 9:30 PM EDT | Special Weather Statement | GRR | 90 min |
| Aug 5, 11:28 PM EDT | Special Weather Statement | GRR | 92 min |
| Aug 7, 11:49 PM EDT | Special Weather Statement | GRR | 56 min |
| Aug 16, 5:32 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 17, 4:08 PM EDT | Beach Hazards Statement | GRR | 28 hr |
| Aug 18, 7:06 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 18, 8:40 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 20, 1:43 PM EDT | Special Weather Statement | GRR | 3 hr |
| Aug 26, 2:53 AM EDT | Beach Hazards Statement | GRR | 4 days |
| Aug 27, 3:54 PM EDT | Lakeshore Flood Advisory | GRR | 57 hr |
| Aug 29, 6:33 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Aug 29, 8:06 PM EDT | Special Weather Statement | GRR | 54 min |
| Sep 2, 4:10 AM EDT | Beach Hazards Statement | GRR | 60 hr |
| Sep 2, 4:10 AM EDT | Lakeshore Flood Watch | GRR | 12 hr |
| Sep 2, 3:59 PM EDT | Lakeshore Flood Warning | GRR | 36 hr |
| Sep 4, 3:46 AM EDT | Lakeshore Flood Advisory | GRR | 12 hr |
| Sep 5, 3:22 PM EDT | Beach Hazards Statement | GRR | 32 hr |
| Sep 10, 3:48 AM EDT | Beach Hazards Statement | GRR | 19 hr |
| Sep 10, 5:58 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 11, 1:48 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Sep 11, 2:31 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 11, 4:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Sep 11, 7:30 PM EDT | Severe Thunderstorm Warning | GRR | 45 min |
| Sep 13, 6:28 AM EDT | Areal Flood Advisory | GRR | 4 hr |
| Sep 14, 3:12 AM EDT | Beach Hazards Statement | GRR | 9 hr |
| Sep 14, 3:41 PM EDT | Beach Hazards Statement | GRR | 25 hr |
| Sep 20, 4:06 PM EDT | Beach Hazards Statement | GRR | 3 days |
| Sep 20, 4:06 PM EDT | Lakeshore Flood Advisory | GRR | 3 days |
| Sep 22, 11:00 PM EDT | Areal Flood Advisory | GRR | 4 hr |
| Sep 24, 3:58 AM EDT | Beach Hazards Statement | GRR | 60 hr |
| Sep 24, 3:58 AM EDT | Lakeshore Flood Advisory | GRR | 36 hr |
| Sep 26, 9:16 PM EDT | Beach Hazards Statement | GRR | 23 hr |
| Sep 27, 9:19 PM EDT | Areal Flood Advisory | GRR | 6 hr |
| Sep 29, 9:49 AM EDT | Areal Flood Advisory | GRR | 9 hr |
| Oct 1, 3:56 AM EDT | Flood Watch | GRR | 31 hr |
| Oct 1, 11:18 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 1, 10:17 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Oct 1, 11:52 PM EDT | Areal Flood Advisory | GRR | 15 hr |
| Oct 3, 9:22 PM EDT | River Flood Warning | GRR | 5 days |
| Oct 7, 3:19 PM EDT | Frost Advisory | GRR | 17 hr |
| Oct 10, 4:04 PM EDT | Lakeshore Flood Advisory | GRR | 3 days |
| Oct 11, 11:25 AM EDT | Areal Flood Advisory | GRR | 6 hr |
| Oct 14, 3:20 AM EDT | Frost Advisory | GRR | 29 hr |
| Oct 15, 3:29 AM EDT | Wind Advisory | GRR | 43 hr |
| Oct 15, 3:36 AM EDT | Lakeshore Flood Advisory | GRR | 12 hr |
| Oct 15, 3:59 PM EDT | Lakeshore Flood Warning | GRR | 30 hr |
| Oct 17, 3:25 AM EDT | Frost Advisory | GRR | 29 hr |
| Oct 21, 3:58 AM EDT | Lakeshore Flood Warning | GRR | 55 hr |
| Oct 27, 3:16 AM EDT | Special Weather Statement | GRR | 119 min |
| Oct 30, 3:52 PM EDT | Winter Weather Advisory | GRR | 35 hr |
| Oct 30, 3:57 PM EDT | Lakeshore Flood Advisory | GRR | 35 hr |
| Oct 31, 12:56 PM EDT | River Flood Watch | GRR | 6 days |
| Nov 2, 11:48 AM EDT | Special Weather Statement | GRR | 4 hr |
| Nov 8, 11:10 AM EST | Lakeshore Flood Advisory | GRR | 31 hr |
| Nov 10, 12:08 PM EST | Winter Weather Advisory | GRR | 53 hr |
| Nov 12, 9:50 PM EST | Lakeshore Flood Advisory | GRR | 18 hr |
| Nov 20, 3:11 PM EST | Lakeshore Flood Advisory | GRR | 34 hr |
| Nov 24, 7:46 PM EST | Lakeshore Flood Watch | GRR | 43 hr |
| Nov 25, 3:23 PM EST | High Wind Watch | GRR | 24 hr |
| Nov 26, 2:56 PM EST | Lakeshore Flood Warning | GRR | 37 hr |
| Nov 26, 3:04 PM EST | High Wind Warning | GRR | 30 hr |
| Nov 29, 3:52 PM EST | Winter Weather Advisory | GRR | 49 hr |
| Dec 3, 3:58 AM EST | Lakeshore Flood Advisory | GRR | 48 hr |
| Dec 6, 3:44 PM EST | Lakeshore Flood Advisory | GRR | 46 hr |
| Dec 11, 2:45 PM EST | Lakeshore Flood Advisory | GRR | 36 hr |
| Dec 14, 6:01 PM EST | Winter Weather Advisory | GRR | 6 hr |
| Dec 17, 3:35 AM EST | Lakeshore Flood Advisory | GRR | 35 hr |
| Dec 17, 3:55 AM EST | Winter Weather Advisory | GRR | 35 hr |
| Dec 29, 3:29 AM EST | Lakeshore Flood Advisory | GRR | 51 hr |
| Dec 29, 3:53 PM EST | Areal Flood Advisory | GRR | 42 hr |
| Dec 29, 4:06 PM EST | Winter Weather Advisory | GRR | 44 hr |
| Dec 30, 12:25 PM EST | River Flood Warning | GRR | 8 days |
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 | 7 |
| Severe Thunderstorm Watch | 6 |
| Mesoscale Discussion | 16 |
| Special Weather Statement | 11 |
| Flooding | |
| River Flood Warning | 5 |
| Flood Watch | 1 |
| River Flood Watch | 2 |
| Areal Flood Advisory | 8 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 24 |
| Heat | |
| Excessive Heat Warning | 1 |
| Cold | |
| Frost Advisory | 5 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 1 |
| Wind Advisory | 4 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
| Coast and beach | |
| Lakeshore Flood Warning | 4 |
| Lakeshore Flood Watch | 3 |
| Lakeshore Flood Advisory | 19 |
| Beach Hazards Statement | 21 |
| Lakeshore Flood Statement | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20182020
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.