Alert archive / Michigan / Keweenaw County
Weather alerts in Keweenaw County, Michigan, 2023
50 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Keweenaw County and its neighbors
Each county as a circle sized by its count in 2023. Tap one for its archive.
- Alerts
- 50
- Warnings
- 9
- Watches
- 4
- Advisories
- 31
- Busiest month
- April14 alerts
- Busiest day
- September 6, 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.
Keweenaw County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 1 | 1 | 0% | 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 Marquette, MI: severe thunderstorm warnings | 34 | 16 | 53% | 54 | 63% | 22 min |
| NWS Marquette, MI: flash flood warnings | 1 | 0 | 100% | 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 18, 3:58 PM EST | Winter Weather Advisory | MQT | 30 hr |
| Jan 26, 2:55 PM EST | Winter Weather Advisory | MQT | 40 hr |
| Jan 29, 3:20 PM EST | Winter Weather Advisory | MQT | 34 hr |
| Jan 31, 3:13 PM EST | Winter Weather Advisory | MQT | 19 hr |
| Feb 1, 3:25 PM EST | Winter Weather Advisory | MQT | 49 hr |
| Feb 19, 3:09 PM EST | Winter Weather Advisory | MQT | 43 hr |
| Feb 21, 2:50 PM EST | Winter Storm Watch | MQT | 25 hr |
| Feb 22, 4:14 AM EST | Winter Storm Warning | MQT | 45 hr |
| Feb 26, 3:24 PM EST | Winter Weather Advisory | MQT | 34 hr |
| Mar 11, 7:35 AM EST | Winter Weather Advisory | MQT | 62 hr |
| Mar 15, 3:50 AM EDT | Winter Storm Watch | MQT | 49 hr |
| Mar 16, 4:58 AM EDT | Winter Storm Warning | MQT | 57 hr |
| Mar 16, 3:40 PM EDT | Lakeshore Flood Advisory | MQT | 58 hr |
| Mar 21, 3:31 AM EDT | Winter Weather Advisory | MQT | 11 hr |
| Mar 30, 4:54 AM EDT | Winter Weather Advisory | MQT | 30 hr |
| Mar 31, 4:14 AM EDT | Lakeshore Flood Advisory | MQT | 32 hr |
| Apr 1, 3:06 AM EDT | Wind Advisory | MQT | 9 hr |
| Apr 3, 3:27 PM EDT | Winter Weather Advisory | MQT | 41 hr |
| Apr 3, 3:29 PM EDT | High Wind Warning | MQT | 12 hr |
| Apr 3, 4:03 PM EDT | Lakeshore Flood Advisory | MQT | 3 days |
| Apr 4, 4:03 AM EDT | Winter Storm Warning | MQT | 31 hr |
| Apr 5, 3:49 AM EDT | High Wind Warning | MQT | 40 hr |
| Apr 5, 1:12 PM EDT | Dense Fog Advisory | MQT | 4 hr |
| Apr 15, 3:11 PM EDT | Flood Watch | MQT | 38 hr |
| Apr 15, 7:17 PM EDT | Special Weather Statement | MQT | 58 min |
| Apr 16, 4:00 AM EDT | Winter Weather Advisory | MQT | 52 hr |
| Apr 16, 3:12 PM EDT | Lakeshore Flood Advisory | MQT | 20 hr |
| Apr 29, 8:22 PM EDT | Flood Watch | MQT | 6 days |
| Apr 30, 6:05 AM EDT | Winter Storm Warning | MQT | 56 hr |
| Apr 30, 9:42 AM EDT | Lakeshore Flood Warning | MQT | 42 hr |
| Jul 26, 4:16 AM EDT | Special Weather Statement | MQT | 29 min |
| Jul 27, 9:08 PM EDT | Special Weather Statement | MQT | 52 min |
| Sep 5, 8:30 PM EDT | Severe Thunderstorm Warning | MQT | 30 min |
| Sep 5, 9:40 PM EDT | Special Weather Statement | MQT | 35 min |
| Sep 5, 11:58 PM EDT | Special Weather Statement | MQT | 32 min |
| Sep 6, 12:52 AM EDT | Areal Flood Advisory | MQT | 3 hr |
| Oct 5, 4:08 PM EDT | Special Weather Statement | MQT | 37 min |
| Oct 26, 1:22 PM EDT | Wind Advisory | MQT | 31 hr |
| Oct 30, 4:10 AM EDT | Winter Storm Warning | MQT | 18 hr |
| Oct 30, 3:10 PM EDT | Winter Weather Advisory | MQT | 26 hr |
| Nov 7, 3:16 PM EST | Winter Weather Advisory | MQT | 18 hr |
| Nov 16, 4:06 AM EST | Wind Advisory | MQT | 18 hr |
| Nov 26, 4:08 AM EST | Winter Weather Advisory | MQT | 51 hr |
| Dec 9, 3:41 AM EST | Winter Weather Advisory | MQT | 25 hr |
| Dec 11, 3:31 PM EST | Wind Advisory | MQT | 24 hr |
| Dec 14, 8:20 PM EST | Wind Advisory | MQT | 9 hr |
| Dec 17, 4:45 AM EST | Winter Weather Advisory | MQT | 38 hr |
| Dec 25, 7:40 PM EST | Dense Fog Advisory | MQT | 13 hr |
| Dec 26, 5:47 PM EST | Dense Fog Advisory | MQT | 8 hr |
| Dec 28, 4:43 AM EST | Dense Fog Advisory | MQT | 4 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 | 1 |
| Special Weather Statement | 6 |
| Flooding | |
| Flood Watch | 2 |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 5 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 17 |
| Wind and dust | |
| High Wind Warning | 2 |
| Wind Advisory | 5 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
| Coast and beach | |
| Lakeshore Flood Warning | 1 |
| Lakeshore Flood Advisory | 4 |
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.