Alert archive / Michigan / Alger County
Weather alerts in Alger County, Michigan, 2020
90 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Alger County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 90
- Warnings
- 19
- Watches
- 4
- Advisories
- 35
- Busiest month
- July18 alerts
- Busiest day
- July 6, 20208 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Alger County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 7 | 2 | 71% | 0 | ||
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Marquette, MI: tornado warnings | 2 | 0 | 100% | 3 | 0% | |
| NWS Marquette, MI: severe thunderstorm warnings | 76 | 22 | 71% | 85 | 67% | 24 min |
| NWS Marquette, MI: flash flood warnings | 3 | 1 | 67% | 7 | 43% | 79 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 5, 4:30 AM EST | Winter Weather Advisory | MQT | 23 hr |
| Jan 5, 4:37 AM EST | Lakeshore Flood Advisory | MQT | 31 hr |
| Jan 6, 3:21 PM EST | Winter Weather Advisory | MQT | 49 hr |
| Jan 8, 4:09 PM EST | Winter Weather Advisory | MQT | 33 hr |
| Jan 15, 3:06 PM EST | Winter Weather Advisory | MQT | 25 hr |
| Jan 16, 2:59 PM EST | Winter Storm Watch | MQT | 14 hr |
| Jan 17, 4:45 AM EST | Winter Weather Advisory | MQT | 56 hr |
| Jan 17, 3:56 PM EST | Winter Storm Warning | MQT | 37 hr |
| Feb 12, 3:56 AM EST | Winter Weather Advisory | MQT | 37 hr |
| Feb 17, 3:56 AM EST | Winter Weather Advisory | MQT | 34 hr |
| Feb 18, 2:38 PM EST | Winter Weather Advisory | MQT | 40 hr |
| Feb 27, 3:30 AM EST | Winter Weather Advisory | MQT | 43 hr |
| Feb 27, 4:05 PM EST | Lakeshore Flood Advisory | MQT | 24 hr |
| Mar 4, 3:34 PM EST | Winter Weather Advisory | MQT | 36 hr |
| Mar 5, 4:21 AM EST | Winter Storm Warning | MQT | 24 hr |
| Mar 5, 4:41 AM EST | Lakeshore Flood Advisory | MQT | 26 hr |
| Mar 12, 4:02 AM EDT | Lakeshore Flood Warning | MQT | 49 hr |
| Mar 12, 3:52 PM EDT | Wind Advisory | MQT | 32 hr |
| Mar 19, 4:57 AM EDT | Winter Weather Advisory | MQT | 33 hr |
| Mar 19, 5:02 AM EDT | Lakeshore Flood Warning | MQT | 39 hr |
| Mar 19, 3:58 PM EDT | Winter Storm Warning | MQT | 25 hr |
| Mar 25, 4:34 AM EDT | Winter Weather Advisory | MQT | 11 hr |
| Apr 10, 4:12 PM EDT | Winter Storm Watch | MQT | 24 hr |
| Apr 11, 3:46 PM EDT | Winter Storm Warning | MQT | 48 hr |
| Apr 11, 3:46 PM EDT | Winter Weather Advisory | MQT | 62 hr |
| Apr 12, 3:46 AM EDT | Lakeshore Flood Warning | MQT | 46 hr |
| Apr 20, 4:21 AM EDT | Lakeshore Flood Warning | MQT | 43 hr |
| Apr 20, 3:40 PM EDT | Wind Advisory | MQT | 13 hr |
| Apr 21, 4:26 AM EDT | Wind Advisory | MQT | 10 hr |
| May 30, 3:09 PM EDT | Frost Advisory | MQT | 18 hr |
| Jun 2, 8:50 AM EDT | Special Weather Statement | MQT | 25 min |
| Jun 10, 3:28 AM EDT | Beach Hazards Statement | MQT | 17 hr |
| Jun 12, 4:11 AM EDT | Frost Advisory | MQT | 27 hr |
| Jun 13, 3:15 PM EDT | Frost Advisory | MQT | 16 hr |
| Jul 5, 4:54 PM EDT | Special Weather Statement | MQT | 51 min |
| Jul 6, 3:32 PM EDT | Special Weather Statement | MQT | 28 min |
| Jul 6, 3:46 PM EDT | Severe Thunderstorm Warning | MQT | 23 min |
| Jul 6, 3:47 PM EDT | Severe Thunderstorm Warning | MQT | 29 min |
| Jul 6, 4:15 PM EDT | Special Weather Statement | MQT | 30 min |
| Jul 6, 4:20 PM EDT | Special Weather Statement | MQT | 25 min |
| Jul 6, 4:43 PM EDT | Special Weather Statement | MQT | 47 min |
| Jul 6, 4:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 6, 4:52 PM EDT | Severe Thunderstorm Warning | MQT | 38 min |
| Jul 10, 9:45 AM EDT | Areal Flood Advisory | MQT | 3 hr |
| Jul 18, 7:16 AM EDT | Special Weather Statement | MQT | 44 min |
| Jul 18, 7:57 AM EDT | Special Weather Statement | MQT | 48 min |
| Jul 18, 8:44 AM EDT | Special Weather Statement | MQT | 61 min |
| Jul 18, 10:44 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 19, 2:13 AM EDT | Mesoscale Discussion | SPC | 92 min |
| Jul 19, 2:37 AM EDT | Severe Thunderstorm Warning | MQT | 53 min |
| Jul 19, 4:32 AM EDT | Beach Hazards Statement | MQT | 17 hr |
| Jul 20, 4:17 AM EDT | Beach Hazards Statement | MQT | 8 hr |
| Aug 2, 4:05 AM EDT | Beach Hazards Statement | MQT | 32 hr |
| Aug 9, 11:11 PM EDT | Mesoscale Discussion | SPC | 34 min |
| Aug 9, 11:35 PM EDT | Special Weather Statement | MQT | 40 min |
| Aug 10, 10:11 AM EDT | Severe Thunderstorm Warning | MQT | 49 min |
| Aug 10, 10:55 AM EDT | Severe Thunderstorm Warning | MQT | 35 min |
| Aug 10, 12:55 PM EDT | Special Weather Statement | MQT | 35 min |
| Aug 10, 1:31 PM EDT | Special Weather Statement | MQT | 44 min |
| Aug 10, 1:58 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 17, 3:38 AM EDT | Beach Hazards Statement | MQT | 20 hr |
| Aug 26, 8:47 AM EDT | Special Weather Statement | MQT | 28 min |
| Aug 27, 3:58 AM EDT | Beach Hazards Statement | MQT | 17 hr |
| Aug 28, 5:16 AM EDT | Beach Hazards Statement | MQT | 39 hr |
| Sep 2, 4:36 AM EDT | Beach Hazards Statement | MQT | 15 hr |
| Sep 2, 4:19 PM EDT | Beach Hazards Statement | MQT | 31 hr |
| Sep 4, 4:17 AM EDT | Beach Hazards Statement | MQT | 17 hr |
| Sep 5, 3:57 AM EDT | Beach Hazards Statement | MQT | 17 hr |
| Sep 6, 3:17 PM EDT | Lakeshore Flood Advisory | MQT | 24 hr |
| Sep 7, 3:58 AM EDT | Beach Hazards Statement | MQT | 18 hr |
| Sep 10, 3:22 PM EDT | Frost Advisory | MQT | 18 hr |
| Sep 13, 4:05 AM EDT | Beach Hazards Statement | MQT | 16 hr |
| Sep 16, 3:59 AM EDT | Frost Advisory | MQT | 29 hr |
| Sep 16, 4:30 AM EDT | Beach Hazards Statement | MQT | 20 hr |
| Sep 17, 12:34 PM EDT | Freeze Warning | MQT | 21 hr |
| Sep 26, 9:56 PM EDT | Special Weather Statement | MQT | 49 min |
| Sep 26, 9:59 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 26, 10:23 PM EDT | Severe Thunderstorm Warning | MQT | 22 min |
| Oct 14, 3:02 PM EDT | Lakeshore Flood Advisory | MQT | 27 hr |
| Oct 21, 4:29 PM EDT | Winter Weather Advisory | MQT | 49 hr |
| Oct 25, 4:10 AM EDT | Winter Weather Advisory | MQT | 36 hr |
| Oct 31, 4:42 AM EDT | Lakeshore Flood Warning | MQT | 41 hr |
| Oct 31, 4:58 AM EDT | High Wind Warning | MQT | 14 hr |
| Oct 31, 4:15 PM EDT | Winter Weather Advisory | MQT | 28 hr |
| Nov 14, 11:47 AM EST | Lakeshore Flood Warning | MQT | 47 hr |
| Nov 14, 3:18 PM EST | Wind Advisory | MQT | 33 hr |
| Dec 22, 1:06 PM EST | Lakeshore Flood Advisory | MQT | 51 hr |
| Dec 23, 3:47 AM EST | Winter Weather Advisory | MQT | 51 hr |
| Dec 27, 3:15 PM EST | Winter Weather Advisory | MQT | 34 hr |
| Dec 29, 4:06 AM EST | Winter Weather Advisory | MQT | 39 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 | 7 |
| Severe Thunderstorm Watch | 2 |
| Mesoscale Discussion | 4 |
| Special Weather Statement | 14 |
| Flooding | |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 19 |
| Cold | |
| Freeze Warning | 1 |
| Frost Advisory | 5 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 4 |
| Coast and beach | |
| Lakeshore Flood Warning | 6 |
| Lakeshore Flood Advisory | 6 |
| Beach Hazards Statement | 14 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.