Alert archive / Michigan / Delta County
Weather alerts in Delta County, Michigan, 2025
67 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Delta County and its neighbors
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Alerts
- 67
- Warnings
- 12
- Watches
- 6
- Advisories
- 23
- Busiest month
- March13 alerts
- Busiest day
- May 16, 20254 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Delta County, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 5 | 3 | 40% | 1 | 100% | 8 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Marquette, MI: severe thunderstorm warnings | 49 | 14 | 71% | 33 | 67% | 23 min |
| NWS Marquette, MI: flash flood warnings | 3 | 3 | 0% | 16 | 63% | 173 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 11, 3:06 PM EST | Winter Weather Advisory | MQT | 3 days |
| Jan 17, 2:51 PM EST | Cold Weather Advisory | MQT | 4 days |
| Jan 19, 4:26 AM EST | Extreme Cold Warning | MQT | 57 hr |
| Jan 21, 4:22 AM EST | Cold Weather Advisory | MQT | 21 hr |
| Jan 27, 3:01 PM EST | Winter Weather Advisory | MQT | 52 hr |
| Jan 28, 7:33 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 14, 2:09 AM EST | Winter Weather Advisory | MQT | 4 days |
| Feb 17, 2:47 PM EST | Cold Weather Advisory | MQT | 19 hr |
| Feb 23, 3:26 PM EST | Winter Weather Advisory | MQT | 16 hr |
| Feb 27, 2:41 PM EST | Wind Advisory | MQT | 34 hr |
| Feb 27, 2:41 PM EST | Winter Weather Advisory | MQT | 34 hr |
| Mar 3, 2:44 PM EST | Winter Weather Advisory | MQT | 19 hr |
| Mar 4, 3:38 AM EST | Winter Weather Advisory | MQT | 48 hr |
| Mar 14, 3:16 PM EDT | Wind Advisory | MQT | 21 hr |
| Mar 17, 3:25 PM EDT | Winter Storm Watch | MQT | 24 hr |
| Mar 18, 3:24 PM EDT | Winter Storm Warning | MQT | 38 hr |
| Mar 18, 3:24 PM EDT | Winter Weather Advisory | MQT | 12 hr |
| Mar 22, 4:03 AM EDT | Winter Weather Advisory | MQT | 58 hr |
| Mar 27, 3:44 AM EDT | Winter Storm Watch | MQT | 24 hr |
| Mar 27, 3:09 PM EDT | Ice Storm Warning | MQT | 69 hr |
| Mar 27, 3:09 PM EDT | Winter Storm Warning | MQT | 4 days |
| Mar 28, 8:41 PM EDT | Special Weather Statement | MQT | 34 min |
| Mar 29, 5:09 PM EDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 30, 3:07 PM EDT | Mesoscale Discussion | SPC | 5 hr |
| Apr 1, 3:04 AM EDT | Winter Weather Advisory | MQT | 41 hr |
| Apr 28, 12:32 PM EDT | Special Weather Statement | MQT | 43 min |
| Apr 28, 10:52 PM EDT | Special Weather Statement | MQT | 38 min |
| Apr 28, 11:35 PM EDT | Mesoscale Discussion | SPC | 85 min |
| May 15, 7:07 PM EDT | Mesoscale Discussion | SPC | 83 min |
| May 15, 10:02 PM EDT | Special Weather Statement | MQT | 43 min |
| May 15, 10:45 PM EDT | Special Weather Statement | MQT | 45 min |
| May 16, 3:30 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 16, 5:13 PM EDT | Severe Thunderstorm Warning | MQT | 42 min |
| May 16, 8:04 PM EDT | Special Weather Statement | MQT | 41 min |
| May 24, 2:57 PM EDT | Frost Advisory | MQT | 18 hr |
| May 31, 2:11 PM EDT | Frost Advisory | MQT | 19 hr |
| Jun 3, 2:32 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jun 21, 5:09 AM EDT | Severe Thunderstorm Warning | MQT | 14 min |
| Jun 21, 9:27 AM EDT | Severe Thunderstorm Warning | MQT | 19 min |
| Jun 21, 9:54 AM EDT | Severe Thunderstorm Warning | MQT | 35 min |
| Jun 23, 2:15 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 29, 6:36 AM EDT | Special Weather Statement | MQT | 39 min |
| Jun 30, 8:40 PM EDT | Special Weather Statement | MQT | 50 min |
| Jul 2, 4:28 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jul 5, 5:28 PM EDT | Special Weather Statement | MQT | 47 min |
| Jul 8, 3:57 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Jul 8, 4:54 PM EDT | Special Weather Statement | MQT | 51 min |
| Jul 23, 7:32 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jul 27, 3:32 PM EDT | Severe Thunderstorm Warning | MQT | 45 min |
| Aug 12, 5:51 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Aug 16, 2:18 PM EDT | Special Weather Statement | MQT | 27 min |
| Sep 17, 8:43 AM EDT | Special Weather Statement | MQT | 62 min |
| Sep 17, 3:18 PM EDT | Special Weather Statement | MQT | 42 min |
| Sep 17, 3:59 PM EDT | Special Weather Statement | MQT | 46 min |
| Sep 22, 12:17 AM EDT | Dense Fog Advisory | MQT | 9 hr |
| Oct 6, 1:26 PM EDT | Freeze Watch | MQT | 14 hr |
| Oct 7, 3:06 AM EDT | Freeze Warning | MQT | 31 hr |
| Nov 7, 2:40 PM EST | Winter Weather Advisory | MQT | 3 days |
| Nov 24, 1:48 AM EST | Winter Storm Watch | MQT | 36 hr |
| Nov 25, 2:33 AM EST | Winter Storm Warning | MQT | 64 hr |
| Nov 28, 2:37 PM EST | Winter Weather Advisory | MQT | 46 hr |
| Dec 17, 3:00 PM EST | Winter Weather Advisory | MQT | 46 hr |
| Dec 25, 2:33 AM EST | Winter Weather Advisory | MQT | 35 hr |
| Dec 26, 2:41 PM EST | Winter Storm Watch | MQT | 24 hr |
| Dec 27, 3:01 PM EST | Blizzard Warning | MQT | 46 hr |
| Dec 29, 4:32 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 29, 12:46 PM EST | Winter Weather Advisory | MQT | 12 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 | 1 |
| Mesoscale Discussion | 12 |
| Special Weather Statement | 14 |
| Winter | |
| Blizzard Warning | 1 |
| Ice Storm Warning | 1 |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 15 |
| Cold | |
| Extreme Cold Warning | 1 |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Cold Weather Advisory | 3 |
| Frost Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20242026
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.