Alert archive / Michigan / Sanilac County
Weather alerts in Sanilac County, Michigan, 2020
98 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Sanilac County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 98
- Warnings
- 13
- Watches
- 11
- Advisories
- 43
- Busiest month
- January15 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.
Sanilac County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 6 | 4 | 33% | 7 | 100% | 23 min |
| 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 Detroit, MI: severe thunderstorm warnings | 81 | 63 | 22% | 163 | 88% | 25 min |
| NWS Detroit, MI: flash flood warnings | 12 | 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 5, 3:11 AM EST | Winter Weather Advisory | DTX | 16 hr |
| Jan 9, 2:00 AM EST | Lakeshore Flood Watch | DTX | 36 hr |
| Jan 9, 2:59 PM EST | Winter Storm Watch | DTX | 25 hr |
| Jan 10, 1:33 PM EST | Lakeshore Flood Warning | DTX | 43 hr |
| Jan 10, 3:34 PM EST | Ice Storm Warning | DTX | 36 hr |
| Jan 11, 10:20 AM EST | Areal Flood Warning | DTX | 18 hr |
| Jan 11, 8:25 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 12, 10:20 PM EST | Winter Weather Advisory | DTX | 10 hr |
| Jan 16, 4:03 AM EST | Lakeshore Flood Advisory | DTX | 24 hr |
| Jan 16, 2:37 PM EST | Winter Storm Watch | DTX | 13 hr |
| Jan 17, 3:55 AM EST | Winter Weather Advisory | DTX | 31 hr |
| Jan 17, 1:05 PM EST | Lakeshore Flood Advisory | DTX | 26 hr |
| Jan 19, 4:37 PM EST | Special Weather Statement | DTX | 113 min |
| Jan 23, 9:04 PM EST | Lakeshore Flood Advisory | DTX | 29 hr |
| Jan 24, 9:34 PM EST | Dense Fog Advisory | DTX | 10 hr |
| Feb 3, 10:20 AM EST | Lakeshore Flood Advisory | DTX | 42 hr |
| Feb 5, 10:30 PM EST | Lakeshore Flood Advisory | DTX | 48 hr |
| Feb 9, 3:16 AM EST | Winter Weather Advisory | DTX | 19 hr |
| Feb 12, 3:36 PM EST | Lakeshore Flood Advisory | DTX | 36 hr |
| Feb 17, 4:17 AM EST | Lakeshore Flood Advisory | DTX | 26 hr |
| Feb 24, 2:02 AM EST | Lakeshore Flood Advisory | DTX | 4 days |
| Feb 24, 3:10 PM EST | Winter Storm Watch | DTX | 25 hr |
| Feb 25, 3:45 PM EST | Winter Weather Advisory | DTX | 30 hr |
| Mar 5, 3:40 PM EST | Lakeshore Flood Advisory | DTX | 36 hr |
| Mar 9, 10:51 AM EDT | Lakeshore Flood Advisory | DTX | 35 hr |
| Mar 14, 10:20 PM EDT | Lakeshore Flood Statement | DTX | 18 hr |
| Apr 7, 8:29 PM EDT | Severe Thunderstorm Warning | DTX | 30 min |
| Apr 11, 3:40 PM EDT | High Wind Watch | DTX | 24 hr |
| Apr 12, 3:26 PM EDT | Wind Advisory | DTX | 31 hr |
| Apr 19, 6:09 AM EDT | Lakeshore Flood Advisory | DTX | 21 hr |
| Apr 21, 12:07 AM EDT | Special Weather Statement | DTX | 53 min |
| Apr 25, 3:10 PM EDT | Lakeshore Flood Advisory | DTX | 31 hr |
| Apr 29, 3:57 AM EDT | Lakeshore Flood Statement | DTX | 18 hr |
| May 3, 2:37 AM EDT | Lakeshore Flood Advisory | DTX | 37 hr |
| May 7, 3:20 AM EDT | Lakeshore Flood Advisory | DTX | 48 hr |
| May 10, 3:51 AM EDT | Lakeshore Flood Advisory | DTX | 36 hr |
| May 16, 3:04 PM EDT | Flood Watch | DTX | 56 hr |
| May 16, 3:41 PM EDT | Lakeshore Flood Warning | DTX | 6 days |
| May 29, 10:20 AM EDT | Special Weather Statement | DTX | 40 min |
| May 30, 8:40 AM EDT | Lakeshore Flood Advisory | DTX | 19 hr |
| Jun 3, 1:56 AM EDT | Mesoscale Discussion | SPC | 94 min |
| Jun 3, 2:36 AM EDT | Special Weather Statement | DTX | 54 min |
| Jun 10, 12:41 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 10, 3:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 10, 3:46 PM EDT | Severe Thunderstorm Warning | DTX | 74 min |
| Jun 11, 8:49 PM EDT | Special Weather Statement | DTX | 56 min |
| Jun 12, 4:30 PM EDT | Lakeshore Flood Advisory | DTX | 23 hr |
| Jun 21, 5:57 PM EDT | Special Weather Statement | DTX | 63 min |
| Jul 7, 3:49 PM EDT | Special Weather Statement | DTX | 26 min |
| Jul 9, 6:20 PM EDT | Severe Thunderstorm Warning | DTX | 55 min |
| Jul 10, 3:06 PM EDT | Flash Flood Watch | DTX | 10 hr |
| Jul 19, 8:42 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 19, 9:35 AM EDT | Special Weather Statement | DTX | 70 min |
| Aug 1, 3:51 AM EDT | Flash Flood Watch | DTX | 33 hr |
| Aug 1, 10:05 PM EDT | Beach Hazards Statement | DTX | 20 hr |
| Aug 1, 10:05 PM EDT | Lakeshore Flood Advisory | DTX | 23 hr |
| Aug 3, 8:24 AM EDT | Special Weather Statement | DTX | 66 min |
| Aug 3, 9:39 AM EDT | Severe Thunderstorm Warning | DTX | 34 min |
| Aug 3, 9:58 PM EDT | Lakeshore Flood Advisory | DTX | 24 hr |
| Aug 4, 3:28 AM EDT | Beach Hazards Statement | DTX | 18 hr |
| Aug 17, 4:02 PM EDT | Lakeshore Flood Advisory | DTX | 24 hr |
| Aug 17, 9:08 PM EDT | Beach Hazards Statement | DTX | 19 hr |
| Aug 27, 11:02 AM EDT | Mesoscale Discussion | SPC | 118 min |
| Aug 27, 12:53 PM EDT | Special Weather Statement | DTX | 67 min |
| Aug 28, 4:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Aug 28, 10:46 PM EDT | Special Weather Statement | DTX | 29 min |
| Aug 28, 10:56 PM EDT | Severe Thunderstorm Warning | DTX | 32 min |
| Sep 3, 3:30 PM EDT | Special Weather Statement | DTX | 2 hr |
| Sep 3, 5:34 PM EDT | Special Weather Statement | DTX | 56 min |
| Sep 6, 11:01 PM EDT | Special Weather Statement | DTX | 3 hr |
| Sep 7, 1:57 AM EDT | Special Weather Statement | DTX | 2 hr |
| Sep 7, 9:41 AM EDT | Lakeshore Flood Advisory | DTX | 54 hr |
| Sep 13, 4:03 PM EDT | Lakeshore Flood Statement | DTX | 24 hr |
| Sep 16, 3:30 AM EDT | Lakeshore Flood Advisory | DTX | 43 hr |
| Sep 17, 10:01 PM EDT | Lakeshore Flood Advisory | DTX | 18 hr |
| Sep 18, 11:10 AM EDT | Frost Advisory | DTX | 22 hr |
| Sep 19, 12:08 PM EDT | Frost Advisory | DTX | 21 hr |
| Sep 30, 5:37 PM EDT | Special Weather Statement | DTX | 53 min |
| Oct 1, 3:49 AM EDT | Lakeshore Flood Advisory | DTX | 36 hr |
| Oct 2, 2:38 PM EDT | Frost Advisory | DTX | 17 hr |
| Oct 10, 6:03 PM EDT | Lakeshore Flood Advisory | DTX | 34 hr |
| Oct 12, 8:20 PM EDT | Special Weather Statement | DTX | 55 min |
| Oct 15, 2:11 PM EDT | Freeze Warning | DTX | 19 hr |
| Oct 16, 2:58 PM EDT | Frost Advisory | DTX | 17 hr |
| Oct 23, 1:21 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Oct 23, 1:56 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Oct 23, 3:04 PM EDT | Severe Thunderstorm Warning | DTX | 56 min |
| Oct 29, 4:17 AM EDT | Lakeshore Flood Advisory | DTX | 30 hr |
| Nov 1, 3:09 AM EST | Wind Advisory | DTX | 19 hr |
| Nov 14, 3:13 AM EST | High Wind Watch | DTX | 11 hr |
| Nov 14, 2:41 PM EST | Wind Advisory | DTX | 12 hr |
| Nov 15, 3:06 AM EST | High Wind Warning | DTX | 20 hr |
| Nov 15, 6:59 PM EST | Wind Advisory | DTX | 8 hr |
| Nov 19, 2:28 AM EST | Wind Advisory | DTX | 15 hr |
| Nov 30, 3:16 AM EST | Lakeshore Flood Warning | DTX | 53 hr |
| Nov 30, 3:24 AM EST | Winter Weather Advisory | DTX | 36 hr |
| Dec 21, 7:37 PM EST | Special Weather Statement | DTX | 53 min |
| Dec 29, 3:57 AM EST | Winter Weather Advisory | DTX | 32 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 | 2 |
| Mesoscale Discussion | 7 |
| Special Weather Statement | 18 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Watch | 2 |
| Flood Watch | 1 |
| Winter | |
| Ice Storm Warning | 1 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 7 |
| Cold | |
| Freeze Warning | 1 |
| Frost Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 2 |
| Wind Advisory | 5 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
| Coast and beach | |
| Lakeshore Flood Warning | 3 |
| Lakeshore Flood Watch | 1 |
| Lakeshore Flood Advisory | 26 |
| Beach Hazards Statement | 3 |
| Lakeshore Flood Statement | 3 |
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.