Alert archive / Michigan / Sanilac County
Weather alerts in Sanilac County, Michigan, 2019
101 weather alerts in 2019, 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 2019. Tap one for its archive.
- Alerts
- 101
- Warnings
- 15
- Watches
- 13
- Advisories
- 41
- Busiest month
- July16 alerts
- Busiest day
- September 11, 20195 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado warnings covering Sanilac County in 2019 had a tornado report inside them.
Sanilac County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 8 | 5 | 38% | 7 | 71% | 25 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Detroit, MI: tornado warnings | 11 | 2 | 82% | 8 | 88% | 14 min |
| NWS Detroit, MI: severe thunderstorm warnings | 84 | 59 | 30% | 162 | 73% | 19 min |
| NWS Detroit, MI: flash flood warnings | 5 | 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 6, 10:24 AM EST | Wind Advisory | DTX | 35 hr |
| Jan 15, 2:58 PM EST | Winter Weather Advisory | DTX | 19 hr |
| Jan 20, 2:44 AM EST | Wind Chill Advisory | DTX | 33 hr |
| Jan 20, 2:44 AM EST | Winter Weather Advisory | DTX | 31 hr |
| Jan 22, 3:05 AM EST | Winter Weather Advisory | DTX | 33 hr |
| Jan 26, 4:05 PM EST | Winter Storm Watch | DTX | 12 hr |
| Jan 27, 3:43 AM EST | Winter Storm Warning | DTX | 40 hr |
| Jan 28, 4:34 PM EST | Wind Chill Watch | DTX | 8 hr |
| Jan 29, 12:23 AM EST | Wind Chill Warning | DTX | 62 hr |
| Jan 31, 1:51 PM EST | Wind Chill Advisory | DTX | 19 hr |
| Feb 5, 3:35 AM EST | Winter Weather Advisory | DTX | 33 hr |
| Feb 5, 9:54 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 6, 3:00 PM EST | Winter Weather Advisory | DTX | 25 hr |
| Feb 7, 3:02 AM EST | Wind Advisory | DTX | 31 hr |
| Feb 7, 7:51 PM EST | Special Weather Statement | DTX | 114 min |
| Feb 10, 3:36 PM EST | Winter Storm Watch | DTX | 24 hr |
| Feb 11, 4:03 PM EST | Winter Storm Warning | DTX | 20 hr |
| Feb 11, 4:03 PM EST | Winter Weather Advisory | DTX | 48 hr |
| Feb 19, 12:23 PM EST | Winter Weather Advisory | DTX | 34 hr |
| Feb 22, 11:00 AM EST | High Wind Watch | DTX | 29 hr |
| Feb 23, 3:43 PM EST | High Wind Warning | DTX | 36 hr |
| Feb 26, 2:45 PM EST | Winter Weather Advisory | DTX | 22 hr |
| Mar 9, 2:56 PM EST | Winter Weather Advisory | DTX | 10 hr |
| Mar 10, 3:03 AM EDT | Wind Advisory | DTX | 13 hr |
| Mar 14, 5:46 PM EDT | Special Weather Statement | DTX | 14 min |
| Mar 14, 6:08 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Mar 14, 8:19 PM EDT | Special Weather Statement | DTX | 26 min |
| Apr 13, 1:12 PM EDT | Coastal Flood Watch | DTX | 14 hr |
| Apr 14, 3:09 AM EDT | Lakeshore Flood Advisory | DTX | 30 hr |
| Apr 18, 2:42 PM EDT | Lakeshore Flood Advisory | DTX | 55 hr |
| Apr 30, 3:30 PM EDT | Lakeshore Flood Advisory | DTX | 24 hr |
| May 7, 11:06 AM EDT | Lakeshore Flood Advisory | DTX | 51 hr |
| May 10, 12:44 PM EDT | Frost Advisory | DTX | 19 hr |
| May 11, 1:41 PM EDT | Lakeshore Flood Advisory | DTX | 56 hr |
| May 19, 2:36 PM EDT | Severe Thunderstorm Warning | DTX | 35 min |
| May 25, 2:59 AM EDT | Special Weather Statement | DTX | 2 hr |
| May 25, 5:07 AM EDT | Areal Flood Advisory | DTX | 7 hr |
| May 25, 9:15 AM EDT | Areal Flood Advisory | DTX | 3 hr |
| May 25, 2:44 PM EDT | Special Weather Statement | DTX | 61 min |
| Jun 1, 12:10 AM EDT | Special Weather Statement | DTX | 65 min |
| Jun 1, 2:43 PM EDT | Severe Thunderstorm Warning | DTX | 45 min |
| Jun 12, 2:10 PM EDT | Lakeshore Flood Advisory | DTX | 38 hr |
| Jun 28, 10:01 AM EDT | Special Weather Statement | DTX | 59 min |
| Jun 28, 10:38 AM EDT | Special Weather Statement | DTX | 67 min |
| Jun 28, 7:19 PM EDT | Severe Thunderstorm Warning | DTX | 56 min |
| Jul 7, 3:48 AM EDT | Beach Hazards Statement | DTX | 17 hr |
| Jul 11, 1:57 AM EDT | Special Weather Statement | DTX | 48 min |
| Jul 11, 2:42 AM EDT | Special Weather Statement | DTX | 18 min |
| Jul 13, 4:29 PM EDT | Special Weather Statement | DTX | 16 min |
| Jul 15, 4:40 PM EDT | Special Weather Statement | DTX | 65 min |
| Jul 18, 4:12 AM EDT | Heat Advisory | DTX | 63 hr |
| Jul 20, 2:15 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 20, 4:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 20, 5:53 PM EDT | Severe Thunderstorm Warning | DTX | 67 min |
| Jul 20, 6:09 PM EDT | Severe Thunderstorm Warning | DTX | 28 min |
| Jul 21, 9:58 PM EDT | Lakeshore Flood Advisory | DTX | 24 hr |
| Jul 22, 4:29 AM EDT | Beach Hazards Statement | DTX | 16 hr |
| Jul 23, 4:24 PM EDT | Special Weather Statement | DTX | 66 min |
| Jul 23, 5:08 PM EDT | Special Weather Statement | DTX | 52 min |
| Jul 29, 2:11 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 29, 2:56 PM EDT | Severe Thunderstorm Warning | DTX | 32 min |
| Aug 12, 9:23 PM EDT | Lakeshore Flood Advisory | DTX | 55 hr |
| Aug 13, 3:46 AM EDT | Beach Hazards Statement | DTX | 18 hr |
| Aug 14, 3:40 AM EDT | Beach Hazards Statement | DTX | 17 hr |
| Aug 18, 12:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Aug 18, 1:49 PM EDT | Severe Thunderstorm Warning | DTX | 56 min |
| Aug 20, 9:07 PM EDT | Special Weather Statement | DTX | 23 min |
| Aug 25, 10:19 PM EDT | Beach Hazards Statement | DTX | 22 hr |
| Aug 25, 10:19 PM EDT | Lakeshore Flood Advisory | DTX | 30 hr |
| Aug 26, 10:13 PM EDT | Beach Hazards Statement | DTX | 13 hr |
| Sep 10, 6:28 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Sep 10, 8:52 PM EDT | Tornado Warning | DTX | 41 min |
| Sep 11, 2:31 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 11, 3:17 PM EDT | Special Weather Statement | DTX | 88 min |
| Sep 11, 3:21 PM EDT | Severe Thunderstorm Warning | DTX | 54 min |
| Sep 11, 4:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Sep 13, 2:45 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 13, 4:40 PM EDT | Special Weather Statement | DTX | 65 min |
| Oct 1, 1:35 PM EDT | Special Weather Statement | DTX | 40 min |
| Oct 1, 2:55 PM EDT | Flood Watch | DTX | 24 hr |
| Oct 2, 4:26 AM EDT | Lakeshore Flood Advisory | DTX | 18 hr |
| Oct 11, 3:54 AM EDT | Lakeshore Flood Advisory | DTX | 20 hr |
| Oct 14, 3:04 AM EDT | Frost Advisory | DTX | 29 hr |
| Oct 17, 3:28 PM EDT | Freeze Warning | DTX | 17 hr |
| Oct 20, 3:29 PM EDT | Lakeshore Flood Advisory | DTX | 32 hr |
| Oct 26, 2:49 AM EDT | Lakeshore Flood Advisory | DTX | 28 hr |
| Oct 30, 3:52 AM EDT | Lakeshore Flood Advisory | DTX | 48 hr |
| Oct 31, 3:10 AM EDT | Wind Advisory | DTX | 25 hr |
| Nov 7, 3:50 AM EST | Lakeshore Flood Advisory | DTX | 32 hr |
| Nov 10, 3:02 AM EST | Winter Storm Watch | DTX | 12 hr |
| Nov 10, 3:10 AM EST | Lakeshore Flood Advisory | DTX | 61 hr |
| Nov 10, 3:11 PM EST | Winter Storm Warning | DTX | 43 hr |
| Nov 27, 3:49 AM EST | Lakeshore Flood Statement | DTX | 5 hr |
| Nov 27, 10:13 PM EST | Lakeshore Flood Advisory | DTX | 24 hr |
| Nov 30, 3:23 AM EST | Winter Storm Watch | DTX | 10 hr |
| Nov 30, 3:23 AM EST | Winter Weather Advisory | DTX | 33 hr |
| Nov 30, 6:34 AM EST | Lakeshore Flood Advisory | DTX | 63 hr |
| Dec 3, 1:06 PM EST | Special Weather Statement | DTX | 69 min |
| Dec 6, 9:38 AM EST | Lakeshore Flood Statement | DTX | 5 hr |
| Dec 29, 6:04 PM EST | Lakeshore Flood Advisory | DTX | 14 hr |
| Dec 29, 8:48 PM EST | Wind Advisory | DTX | 19 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 archive20182020
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.