Alert archive / Michigan / Alpena County
Weather alerts in Alpena County, Michigan, 2020
60 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Alpena County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 60
- Warnings
- 16
- Watches
- 7
- Advisories
- 22
- Busiest month
- January10 alerts
- Busiest day
- June 10, 20203 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Alpena County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 6 | 1 | 83% | 1 | 100% | 30 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Gaylord, MI: tornado warnings | 2 | 0 | 100% | 0 | ||
| NWS Gaylord, MI: severe thunderstorm warnings | 64 | 20 | 69% | 59 | 59% | 19 min |
| NWS Gaylord, MI: flash flood warnings | 15 | 4 | 73% | 6 | 83% | 37 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 4, 2:19 AM EST | Winter Weather Advisory | APX | 22 hr |
| Jan 5, 3:03 AM EST | Winter Weather Advisory | APX | 24 hr |
| Jan 8, 4:00 PM EST | Winter Weather Advisory | APX | 33 hr |
| Jan 9, 3:43 PM EST | Winter Storm Watch | APX | 45 hr |
| Jan 10, 3:06 PM EST | Winter Storm Warning | APX | 38 hr |
| Jan 10, 3:10 PM EST | Lakeshore Flood Warning | APX | 36 hr |
| Jan 10, 10:48 PM EST | Winter Weather Advisory | APX | 11 hr |
| Jan 16, 4:14 PM EST | Winter Storm Watch | APX | 11 hr |
| Jan 17, 3:29 AM EST | Winter Weather Advisory | APX | 54 hr |
| Jan 17, 2:47 PM EST | Lakeshore Flood Advisory | APX | 22 hr |
| Feb 9, 3:15 AM EST | Winter Weather Advisory | APX | 21 hr |
| Feb 17, 3:43 AM EST | Winter Weather Advisory | APX | 35 hr |
| Feb 27, 3:27 AM EST | Winter Weather Advisory | APX | 48 hr |
| Mar 5, 1:49 PM EST | Winter Weather Advisory | APX | 20 hr |
| Mar 5, 4:48 PM EST | Lakeshore Flood Advisory | APX | 23 hr |
| Apr 11, 4:56 PM EDT | High Wind Watch | APX | 23 hr |
| Apr 12, 3:38 PM EDT | Wind Advisory | APX | 32 hr |
| May 16, 2:45 PM EDT | Flood Watch | APX | 56 hr |
| May 17, 12:36 PM EDT | Lakeshore Flood Warning | APX | 28 hr |
| May 18, 4:06 PM EDT | Lakeshore Flood Advisory | APX | 19 hr |
| May 28, 2:24 PM EDT | Special Weather Statement | APX | 3 hr |
| May 29, 7:53 PM EDT | Special Weather Statement | APX | 67 min |
| May 30, 3:24 PM EDT | Frost Advisory | APX | 17 hr |
| Jun 9, 4:10 AM EDT | Wind Advisory | APX | 32 hr |
| Jun 9, 11:11 PM EDT | Beach Hazards Statement | APX | 40 hr |
| Jun 10, 12:17 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jun 10, 12:41 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 18, 10:30 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 18, 12:15 PM EDT | Severe Thunderstorm Warning | APX | 30 min |
| Jul 18, 4:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 19, 4:22 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Jul 19, 6:14 AM EDT | Severe Thunderstorm Warning | APX | 61 min |
| Jul 19, 6:52 AM EDT | Special Weather Statement | APX | 53 min |
| Jul 26, 6:55 PM EDT | Severe Thunderstorm Warning | APX | 27 min |
| Jul 26, 10:41 PM EDT | Special Weather Statement | APX | 34 min |
| Aug 10, 3:53 PM EDT | Severe Thunderstorm Warning | APX | 37 min |
| Aug 10, 5:30 PM EDT | Severe Thunderstorm Warning | APX | 45 min |
| Aug 10, 6:19 PM EDT | Flash Flood Warning | APX | 2 hr |
| Aug 10, 8:16 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Aug 17, 1:19 PM EDT | Special Weather Statement | APX | 56 min |
| Aug 23, 3:23 PM EDT | Special Weather Statement | APX | 37 min |
| Sep 5, 3:32 PM EDT | Beach Hazards Statement | APX | 48 hr |
| Sep 17, 3:17 AM EDT | Freeze Warning | APX | 29 hr |
| Sep 18, 9:37 AM EDT | Freeze Warning | APX | 23 hr |
| Sep 26, 12:16 PM EDT | Severe Thunderstorm Warning | APX | 29 min |
| Oct 1, 3:41 PM EDT | Frost Advisory | APX | 16 hr |
| Oct 2, 10:52 AM EDT | Freeze Warning | APX | 21 hr |
| Oct 31, 4:18 AM EDT | Wind Advisory | APX | 40 hr |
| Nov 14, 4:40 AM EST | Lakeshore Flood Watch | APX | 10 hr |
| Nov 14, 4:42 AM EST | Wind Advisory | APX | 23 hr |
| Nov 14, 2:37 PM EST | Lakeshore Flood Warning | APX | 45 hr |
| Nov 15, 4:11 AM EST | High Wind Warning | APX | 21 hr |
| Nov 24, 4:03 AM EST | Winter Weather Advisory | APX | 24 hr |
| Nov 30, 3:57 AM EST | Lakeshore Flood Advisory | APX | 55 hr |
| Dec 10, 4:05 PM EST | Winter Storm Watch | APX | 23 hr |
| Dec 11, 2:43 PM EST | Winter Storm Warning | APX | 30 hr |
| Dec 11, 2:51 PM EST | Lakeshore Flood Advisory | APX | 37 hr |
| Dec 12, 10:01 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 12, 1:54 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 29, 3:04 AM EST | Winter Weather Advisory | APX | 33 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 | 6 |
| Severe Thunderstorm Watch | 1 |
| Mesoscale Discussion | 7 |
| Special Weather Statement | 6 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 11 |
| Cold | |
| Freeze Warning | 3 |
| Frost Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 4 |
| Coast and beach | |
| Lakeshore Flood Warning | 3 |
| Lakeshore Flood Watch | 1 |
| Lakeshore Flood Advisory | 5 |
| Beach Hazards Statement | 2 |
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.