Alert archive / Michigan / Mason County
Weather alerts in Mason County, Michigan, 2024
73 weather alerts in 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Mason County and its neighbors
Each county as a circle sized by its count in 2024. Tap one for its archive.
- Alerts
- 73
- Warnings
- 8
- Watches
- 9
- Advisories
- 20
- Busiest month
- June13 alerts
- Busiest day
- August 27, 20245 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Mason County, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 2 | 2 | 0% | 1 | 100% | 3 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Grand Rapids, MI: tornado warnings | 21 | 5 | 76% | 8 | 88% | 15 min |
| NWS Grand Rapids, MI: severe thunderstorm warnings | 88 | 49 | 44% | 179 | 73% | 32 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 8, 3:25 AM EST | Winter Storm Watch | GRR | 11 hr |
| Jan 8, 2:51 PM EST | Winter Weather Advisory | GRR | 39 hr |
| Jan 10, 3:39 PM EST | Winter Storm Watch | GRR | 23 hr |
| Jan 11, 3:04 PM EST | Winter Storm Warning | GRR | 69 hr |
| Jan 11, 3:04 PM EST | Winter Weather Advisory | GRR | 6 days |
| Jan 12, 6:47 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 19, 1:50 PM EST | Winter Weather Advisory | GRR | 32 hr |
| Feb 14, 3:09 PM EST | Winter Weather Advisory | GRR | 20 hr |
| Feb 27, 3:43 PM EST | Winter Weather Advisory | GRR | 24 hr |
| Mar 4, 8:27 PM EST | Special Weather Statement | GRR | 93 min |
| Mar 21, 3:43 PM EDT | Winter Weather Advisory | GRR | 30 hr |
| Apr 11, 2:59 PM EDT | Wind Advisory | GRR | 31 hr |
| Apr 16, 10:24 AM EDT | Red Flag Warning | GRR | 10 hr |
| Apr 16, 11:43 AM EDT | Wind Advisory | GRR | 14 hr |
| Apr 22, 8:23 AM EDT | Red Flag Warning | GRR | 12 hr |
| Apr 23, 3:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Apr 27, 9:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Apr 27, 9:58 PM EDT | Special Weather Statement | GRR | 62 min |
| May 12, 9:13 PM EDT | Special Weather Statement | GRR | 2 hr |
| May 20, 4:21 PM EDT | Mesoscale Discussion | SPC | 114 min |
| May 22, 4:12 AM EDT | Beach Hazards Statement | GRR | 16 hr |
| May 26, 10:21 AM EDT | Beach Hazards Statement | GRR | 34 hr |
| Jun 5, 9:50 AM EDT | Beach Hazards Statement | GRR | 54 hr |
| Jun 9, 3:36 AM EDT | Beach Hazards Statement | GRR | 43 hr |
| Jun 15, 3:02 PM EDT | Beach Hazards Statement | GRR | 35 hr |
| Jun 17, 3:22 PM EDT | Beach Hazards Statement | GRR | 47 hr |
| Jun 22, 3:45 AM EDT | Beach Hazards Statement | GRR | 40 hr |
| Jun 22, 3:56 AM EDT | Flood Watch | GRR | 22 hr |
| Jun 24, 3:33 AM EDT | Beach Hazards Statement | GRR | 40 hr |
| Jun 25, 1:55 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 25, 3:46 AM EDT | Special Weather Statement | GRR | 59 min |
| Jun 25, 4:48 AM EDT | Severe Thunderstorm Warning | GRR | 57 min |
| Jun 25, 5:09 AM EDT | Mesoscale Discussion | SPC | 96 min |
| Jun 26, 3:36 AM EDT | Beach Hazards Statement | GRR | 19 hr |
| Jun 29, 10:11 AM EDT | Beach Hazards Statement | GRR | 36 hr |
| Jul 2, 3:43 AM EDT | Beach Hazards Statement | GRR | 16 hr |
| Jul 3, 3:00 AM EDT | Beach Hazards Statement | GRR | 9 hr |
| Jul 5, 11:09 AM EDT | Special Weather Statement | GRR | 66 min |
| Jul 16, 2:09 PM EDT | Beach Hazards Statement | GRR | 54 hr |
| Jul 24, 3:25 AM EDT | Beach Hazards Statement | GRR | 19 hr |
| Aug 5, 1:50 AM EDT | Special Weather Statement | GRR | 55 min |
| Aug 8, 3:41 AM EDT | Beach Hazards Statement | GRR | 4 days |
| Aug 15, 3:52 AM EDT | Beach Hazards Statement | GRR | 22 hr |
| Aug 17, 2:01 PM EDT | Beach Hazards Statement | GRR | 56 hr |
| Aug 26, 1:20 PM EDT | Heat Advisory | GRR | 29 hr |
| Aug 27, 3:22 AM EDT | Special Weather Statement | GRR | 83 min |
| Aug 27, 12:25 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 27, 1:26 PM EDT | Special Weather Statement | GRR | 64 min |
| Aug 27, 1:48 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 27, 1:51 PM EDT | Severe Thunderstorm Warning | GRR | 54 min |
| Aug 30, 3:07 PM EDT | Beach Hazards Statement | GRR | 58 hr |
| Sep 5, 3:31 PM EDT | Beach Hazards Statement | GRR | 59 hr |
| Sep 8, 3:43 AM EDT | Beach Hazards Statement | GRR | 37 hr |
| Sep 21, 12:42 AM EDT | Dense Fog Advisory | GRR | 9 hr |
| Sep 22, 3:42 AM EDT | Beach Hazards Statement | GRR | 31 hr |
| Oct 10, 4:05 PM EDT | Fire Weather Watch | GRR | 17 hr |
| Oct 11, 9:14 AM EDT | Red Flag Warning | GRR | 10 hr |
| Oct 29, 3:30 AM EDT | Wind Advisory | GRR | 12 hr |
| Oct 30, 3:32 AM EDT | Wind Advisory | GRR | 12 hr |
| Oct 31, 3:31 AM EDT | Wind Advisory | GRR | 22 hr |
| Nov 11, 8:57 AM EST | Wind Advisory | GRR | 10 hr |
| Nov 18, 4:04 AM EST | Dense Fog Advisory | GRR | 6 hr |
| Nov 28, 1:59 PM EST | Winter Weather Advisory | GRR | 46 hr |
| Dec 1, 3:07 AM EST | Winter Storm Watch | GRR | 11 hr |
| Dec 1, 3:07 AM EST | Winter Weather Advisory | GRR | 52 hr |
| Dec 3, 2:39 PM EST | Winter Storm Watch | GRR | 13 hr |
| Dec 4, 3:33 AM EST | Winter Storm Warning | GRR | 45 hr |
| Dec 4, 4:40 PM EST | Mesoscale Discussion | SPC | 3 hr |
| Dec 9, 2:38 PM EST | Winter Storm Watch | GRR | 25 hr |
| Dec 10, 3:29 PM EST | Winter Storm Warning | GRR | 48 hr |
| Dec 14, 12:31 PM EST | Winter Weather Advisory | GRR | 22 hr |
| Dec 19, 2:05 AM EST | Winter Weather Advisory | GRR | 32 hr |
| Dec 22, 2:53 PM EST | Winter Weather Advisory | GRR | 32 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 | 2 |
| Severe Thunderstorm Watch | 2 |
| Mesoscale Discussion | 7 |
| Special Weather Statement | 8 |
| Flooding | |
| Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 5 |
| Winter Weather Advisory | 11 |
| Heat | |
| Heat Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 6 |
| Fire | |
| Red Flag Warning | 3 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
| Coast and beach | |
| Beach Hazards Statement | 21 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20232025
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.