Alert archive / Michigan / Muskegon County
Weather alerts in Muskegon County, Michigan, 2021
105 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Muskegon County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 105
- Warnings
- 12
- Watches
- 12
- Advisories
- 33
- Busiest month
- August18 alerts
- Busiest day
- August 11, 20217 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Muskegon County, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 5 | 3 | 40% | 6 | 83% | 28 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Grand Rapids, MI: tornado warnings | 14 | 0 | 100% | 8 | 0% | |
| NWS Grand Rapids, MI: severe thunderstorm warnings | 100 | 54 | 46% | 209 | 75% | 23 min |
| NWS Grand Rapids, MI: flash flood warnings | 1 | 0 | 100% | 2 | 0% |
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 11, 3:06 PM EST | Winter Weather Advisory | GRR | 24 hr |
| Jan 20, 4:15 AM EST | Lakeshore Flood Advisory | GRR | 25 hr |
| Jan 24, 2:21 PM EST | Winter Weather Advisory | GRR | 49 hr |
| Feb 3, 3:38 PM EST | Winter Weather Advisory | GRR | 4 days |
| Feb 4, 11:59 AM EST | Winter Storm Warning | GRR | 27 hr |
| Feb 8, 3:49 AM EST | Winter Weather Advisory | GRR | 32 hr |
| Feb 19, 3:39 AM EST | Winter Weather Advisory | GRR | 29 hr |
| Feb 21, 12:10 PM EST | Winter Weather Advisory | GRR | 21 hr |
| Mar 10, 3:37 AM EST | Wind Advisory | GRR | 38 hr |
| Mar 15, 11:22 AM EDT | Winter Weather Advisory | GRR | 21 hr |
| Mar 18, 3:23 AM EDT | Wind Advisory | GRR | 17 hr |
| Apr 5, 6:27 AM EDT | Special Weather Statement | GRR | 108 min |
| Apr 19, 3:42 AM EDT | Freeze Watch | GRR | 12 hr |
| Apr 19, 3:30 PM EDT | Freeze Warning | GRR | 66 hr |
| Apr 29, 6:46 PM EDT | Special Weather Statement | GRR | 119 min |
| May 1, 3:00 AM EDT | Wind Advisory | GRR | 17 hr |
| May 1, 8:44 PM EDT | Special Weather Statement | GRR | 2 hr |
| May 1, 10:11 PM EDT | Special Weather Statement | GRR | 64 min |
| May 7, 5:58 AM EDT | Dense Fog Advisory | GRR | 3 hr |
| May 7, 3:51 PM EDT | Frost Advisory | GRR | 17 hr |
| May 9, 3:46 PM EDT | Frost Advisory | GRR | 17 hr |
| May 10, 10:10 AM EDT | Freeze Warning | GRR | 22 hr |
| May 11, 11:13 AM EDT | Freeze Warning | GRR | 21 hr |
| May 12, 1:38 PM EDT | Frost Advisory | GRR | 18 hr |
| May 13, 12:00 PM EDT | Frost Advisory | GRR | 19 hr |
| May 29, 10:20 AM EDT | Frost Advisory | GRR | 22 hr |
| Jun 4, 12:56 PM EDT | Fire Weather Watch | GRR | 22 hr |
| Jun 4, 3:39 PM EDT | Beach Hazards Statement | GRR | 30 hr |
| Jun 15, 3:57 AM EDT | Beach Hazards Statement | GRR | 18 hr |
| Jun 17, 9:12 AM EDT | Red Flag Warning | GRR | 11 hr |
| Jun 18, 4:44 AM EDT | Special Weather Statement | GRR | 4 hr |
| Jun 19, 10:59 AM EDT | Special Weather Statement | GRR | 61 min |
| Jun 20, 4:52 AM EDT | Beach Hazards Statement | GRR | 45 hr |
| Jun 22, 3:41 PM EDT | Beach Hazards Statement | GRR | 60 hr |
| Jun 25, 2:56 PM EDT | Flood Watch | GRR | 29 hr |
| Jun 26, 1:05 PM EDT | Tornado Watch | SPC | 9 hr |
| Jun 26, 2:36 PM EDT | Areal Flood Advisory | GRR | 4 hr |
| Jun 26, 3:49 PM EDT | Beach Hazards Statement | GRR | 24 hr |
| Jun 30, 3:14 PM EDT | Beach Hazards Statement | GRR | 37 hr |
| Jul 4, 2:39 PM EDT | Beach Hazards Statement | GRR | 32 hr |
| Jul 7, 12:13 PM EDT | Special Weather Statement | GRR | 4 hr |
| Jul 14, 3:17 AM EDT | Beach Hazards Statement | GRR | 39 hr |
| Jul 14, 11:15 PM EDT | Special Weather Statement | GRR | 60 min |
| Jul 19, 4:00 PM EDT | Beach Hazards Statement | GRR | 35 hr |
| Jul 23, 3:06 AM EDT | Beach Hazards Statement | GRR | 41 hr |
| Jul 23, 5:06 AM EDT | Areal Flood Advisory | GRR | 5 hr |
| Jul 24, 3:16 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 28, 11:06 AM EDT | Beach Hazards Statement | GRR | 55 hr |
| Jul 31, 4:21 AM EDT | Beach Hazards Statement | GRR | 48 hr |
| Aug 5, 3:19 PM EDT | Beach Hazards Statement | GRR | 29 hr |
| Aug 6, 4:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Aug 7, 11:37 PM EDT | Special Weather Statement | GRR | 83 min |
| Aug 8, 4:05 AM EDT | Beach Hazards Statement | GRR | 22 hr |
| Aug 10, 3:06 PM EDT | Beach Hazards Statement | GRR | 36 hr |
| Aug 10, 8:12 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Aug 10, 8:38 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 10, 9:22 PM EDT | Special Weather Statement | GRR | 3 hr |
| Aug 10, 9:40 PM EDT | Severe Thunderstorm Warning | GRR | 73 min |
| Aug 11, 11:50 AM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 11, 7:32 PM EDT | Severe Thunderstorm Warning | GRR | 43 min |
| Aug 11, 7:45 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Aug 21, 8:59 AM EDT | Beach Hazards Statement | GRR | 38 hr |
| Aug 24, 2:02 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Aug 27, 3:22 PM EDT | Heat Advisory | GRR | 29 hr |
| Aug 28, 10:40 AM EDT | Beach Hazards Statement | GRR | 35 hr |
| Aug 29, 1:46 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 29, 3:18 PM EDT | Severe Thunderstorm Warning | GRR | 28 min |
| Sep 1, 11:39 AM EDT | Beach Hazards Statement | GRR | 15 hr |
| Sep 3, 3:56 PM EDT | Beach Hazards Statement | GRR | 64 hr |
| Sep 6, 3:50 PM EDT | Beach Hazards Statement | GRR | 64 hr |
| Sep 7, 11:47 AM EDT | Mesoscale Discussion | SPC | 58 min |
| Sep 7, 12:21 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 7, 1:49 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Sep 7, 1:51 PM EDT | Severe Thunderstorm Warning | GRR | 54 min |
| Sep 7, 2:01 PM EDT | Lakeshore Flood Advisory | GRR | 4 hr |
| Sep 10, 3:53 AM EDT | Beach Hazards Statement | GRR | 41 hr |
| Sep 12, 2:43 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Sep 12, 4:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Sep 12, 5:15 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Sep 12, 6:22 PM EDT | Special Weather Statement | GRR | 53 min |
| Sep 12, 6:40 PM EDT | Severe Thunderstorm Warning | GRR | 35 min |
| Sep 13, 3:08 AM EDT | Beach Hazards Statement | GRR | 50 hr |
| Sep 13, 10:52 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Sep 13, 10:56 AM EDT | Special Weather Statement | GRR | 64 min |
| Sep 19, 4:02 PM EDT | Beach Hazards Statement | GRR | 8 days |
| Oct 11, 1:37 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Oct 11, 5:57 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Oct 11, 9:20 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Nov 13, 3:02 PM EST | Winter Weather Advisory | GRR | 21 hr |
| Nov 21, 10:32 AM EST | Wind Advisory | GRR | 11 hr |
| Nov 27, 3:19 AM EST | Winter Weather Advisory | GRR | 19 hr |
| Nov 29, 11:23 AM EST | Winter Weather Advisory | GRR | 16 hr |
| Nov 29, 4:46 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 5, 4:05 AM EST | Winter Weather Advisory | GRR | 20 hr |
| Dec 6, 4:02 AM EST | Winter Weather Advisory | GRR | 18 hr |
| Dec 7, 3:40 AM EST | Winter Weather Advisory | GRR | 37 hr |
| Dec 9, 3:27 PM EST | High Wind Watch | GRR | 24 hr |
| Dec 10, 2:58 PM EST | Wind Advisory | GRR | 28 hr |
| Dec 11, 6:32 AM EST | High Wind Warning | GRR | 5 hr |
| Dec 11, 6:32 AM EST | Wind Advisory | GRR | 12 hr |
| Dec 14, 3:55 PM EST | High Wind Watch | GRR | 11 hr |
| Dec 15, 2:58 AM EST | Lakeshore Flood Advisory | GRR | 31 hr |
| Dec 15, 3:02 AM EST | High Wind Warning | GRR | 33 hr |
| Dec 15, 3:02 AM EST | Wind Advisory | GRR | 41 hr |
| Dec 26, 9:44 PM EST | Winter Weather Advisory | GRR | 11 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 | 5 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 13 |
| Special Weather Statement | 12 |
| Flooding | |
| Flood Watch | 1 |
| Areal Flood Advisory | 2 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Weather Advisory | 14 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 1 |
| Frost Advisory | 5 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 2 |
| Wind Advisory | 7 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
| Coast and beach | |
| Lakeshore Flood Advisory | 3 |
| Beach Hazards Statement | 23 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20202022
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.