Alert archive / Michigan / Arenac County
Weather alerts in Arenac County, Michigan, 2020
57 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Arenac County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 57
- Warnings
- 19
- Watches
- 7
- Advisories
- 20
- Busiest month
- May10 alerts
- Busiest day
- May 18, 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.
Arenac County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 4 | 2 | 50% | 5 | 100% | 7 min |
| Flash flood warnings | 1 | 1 | 0% | 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 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 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 |
| Apr 7, 8:53 PM EDT | Severe Thunderstorm Warning | APX | 32 min |
| Apr 11, 4:56 PM EDT | High Wind Watch | APX | 23 hr |
| Apr 12, 3:38 PM EDT | Wind Advisory | APX | 32 hr |
| Apr 29, 11:54 AM EDT | River Flood Warning | APX | 68 hr |
| Apr 30, 9:22 AM EDT | Areal Flood Warning | APX | 12 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 17, 9:50 PM EDT | River Flood Warning | APX | 5 days |
| May 18, 1:25 PM EDT | Areal Flood Warning | APX | 24 hr |
| May 18, 4:06 PM EDT | Lakeshore Flood Advisory | APX | 19 hr |
| May 19, 1:12 PM EDT | Areal Flood Warning | APX | 6 hr |
| May 19, 7:00 PM EDT | Areal Flood Warning | APX | 24 hr |
| May 20, 7:00 PM EDT | Areal Flood Warning | APX | 24 hr |
| May 21, 7:00 PM EDT | Areal Flood Warning | APX | 24 hr |
| May 28, 2:24 PM EDT | Special Weather Statement | APX | 3 hr |
| Jun 3, 1:39 AM EDT | Special Weather Statement | APX | 51 min |
| Jun 3, 2:01 AM EDT | Special Weather Statement | APX | 29 min |
| Jun 9, 4:10 AM EDT | Wind Advisory | APX | 32 hr |
| Jun 10, 12:17 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jun 10, 12:41 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 10, 1:44 PM EDT | Severe Thunderstorm Warning | APX | 31 min |
| Jun 11, 7:45 PM EDT | Special Weather Statement | APX | 30 min |
| Jul 19, 7:33 AM EDT | Severe Thunderstorm Warning | APX | 42 min |
| Jul 19, 8:28 AM EDT | Severe Thunderstorm Warning | APX | 36 min |
| Jul 19, 8:42 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 10, 8:16 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Aug 10, 9:12 PM EDT | Flash Flood Warning | APX | 4 hr |
| Aug 17, 5:11 PM EDT | Special Weather Statement | APX | 34 min |
| Aug 17, 5:37 PM EDT | Special Weather Statement | APX | 23 min |
| Sep 6, 9:38 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Sep 7, 12:20 AM EDT | Mesoscale Discussion | SPC | 115 min |
| Sep 9, 3:34 AM EDT | Beach Hazards Statement | APX | 13 hr |
| Sep 17, 3:17 AM EDT | Frost Advisory | APX | 29 hr |
| Sep 18, 9:37 AM EDT | Freeze Warning | APX | 23 hr |
| Sep 19, 11:50 AM EDT | Frost Advisory | APX | 21 hr |
| 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, 4:42 AM EST | Wind Advisory | APX | 23 hr |
| Nov 15, 4:11 AM EST | High Wind Warning | APX | 21 hr |
| Nov 15, 9:39 PM EST | Wind Advisory | APX | 9 hr |
| Nov 19, 3:35 AM EST | Wind Advisory | APX | 13 hr |
| Nov 24, 4:03 AM EST | Winter Weather Advisory | APX | 24 hr |
| Dec 10, 4:05 PM EST | Winter Storm Watch | APX | 23 hr |
| Dec 11, 2:43 PM EST | Winter Weather Advisory | APX | 30 hr |
| Dec 11, 2:51 PM EST | Lakeshore Flood Advisory | APX | 37 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.
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.