Alert archive / Michigan / Lapeer County
Weather alerts in Lapeer County, Michigan, 2023
85 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Lapeer County and its neighbors
Each county as a circle sized by its count in 2023. Tap one for its archive.
- Alerts
- 85
- Warnings
- 20
- Watches
- 9
- Advisories
- 20
- Busiest month
- July25 alerts
- Busiest day
- July 11, 20236 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 2 tornado warnings covering Lapeer County in 2023 had a tornado report inside them.
Lapeer County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 12 | 5 | 58% | 13 | 69% | 24 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Detroit, MI: tornado warnings | 15 | 5 | 67% | 20 | 60% | 11 min |
| NWS Detroit, MI: severe thunderstorm warnings | 110 | 70 | 36% | 212 | 90% | 27 min |
| NWS Detroit, MI: flash flood warnings | 4 | 1 | 75% | 2 | 100% | 0 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, 3:20 AM EST | Dense Fog Advisory | DTX | 10 hr |
| Jan 24, 2:56 PM EST | Winter Weather Advisory | DTX | 31 hr |
| Jan 27, 7:12 PM EST | Special Weather Statement | DTX | 48 min |
| Jan 28, 3:33 AM EST | Winter Weather Advisory | DTX | 28 hr |
| Feb 2, 2:03 PM EST | Wind Chill Advisory | DTX | 19 hr |
| Feb 2, 4:52 PM EST | Special Weather Statement | DTX | 68 min |
| Feb 14, 3:42 AM EST | Wind Advisory | DTX | 36 hr |
| Feb 15, 3:43 PM EST | Winter Weather Advisory | DTX | 36 hr |
| Feb 16, 10:24 AM EST | Winter Weather Advisory | DTX | 18 hr |
| Feb 20, 4:03 PM EST | Winter Storm Watch | DTX | 24 hr |
| Feb 21, 3:33 PM EST | Winter Storm Warning | DTX | 36 hr |
| Feb 22, 9:46 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 22, 4:27 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 26, 2:15 PM EST | Winter Weather Advisory | DTX | 30 hr |
| Mar 2, 3:53 AM EST | Winter Storm Watch | DTX | 18 hr |
| Mar 2, 10:08 PM EST | Winter Storm Warning | DTX | 30 hr |
| Mar 9, 3:20 AM EST | Winter Weather Advisory | DTX | 41 hr |
| Mar 24, 3:48 PM EDT | Wind Advisory | DTX | 32 hr |
| Apr 3, 3:02 PM EDT | Flood Watch | DTX | 17 hr |
| Apr 5, 3:05 AM EDT | Special Weather Statement | DTX | 55 min |
| Apr 5, 7:09 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 5, 8:41 AM EDT | Tornado Watch | SPC | 7 hr |
| Apr 5, 10:57 AM EDT | Mesoscale Discussion | SPC | 93 min |
| Apr 16, 1:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 22, 1:21 PM EDT | Special Weather Statement | DTX | 84 min |
| Apr 22, 1:54 PM EDT | Special Weather Statement | DTX | 96 min |
| Apr 23, 2:47 PM EDT | Freeze Warning | DTX | 13 hr |
| Apr 24, 3:00 PM EDT | Freeze Warning | DTX | 17 hr |
| Apr 25, 10:38 AM EDT | Freeze Warning | DTX | 21 hr |
| Apr 26, 10:49 AM EDT | Freeze Warning | DTX | 21 hr |
| May 17, 3:12 PM EDT | Frost Advisory | DTX | 16 hr |
| May 24, 3:44 AM EDT | Frost Advisory | DTX | 28 hr |
| May 25, 1:59 PM EDT | Frost Advisory | DTX | 18 hr |
| Jun 13, 2:51 PM EDT | Special Weather Statement | DTX | 54 min |
| Jun 13, 4:52 PM EDT | Special Weather Statement | DTX | 53 min |
| Jun 13, 5:38 PM EDT | Special Weather Statement | DTX | 37 min |
| Jun 15, 4:09 PM EDT | Special Weather Statement | DTX | 51 min |
| Jun 25, 4:24 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 25, 4:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 25, 7:15 PM EDT | Special Weather Statement | DTX | 60 min |
| Jul 2, 2:31 PM EDT | Areal Flood Advisory | DTX | 3 hr |
| Jul 2, 4:14 PM EDT | Special Weather Statement | DTX | 46 min |
| Jul 2, 4:37 PM EDT | Areal Flood Advisory | DTX | 3 hr |
| Jul 2, 5:12 PM EDT | Areal Flood Advisory | DTX | 3 hr |
| Jul 11, 1:48 PM EDT | Special Weather Statement | DTX | 42 min |
| Jul 11, 1:58 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jul 11, 2:52 PM EDT | Tornado Warning | DTX | 38 min |
| Jul 11, 3:14 PM EDT | Severe Thunderstorm Warning | DTX | 61 min |
| Jul 11, 3:57 PM EDT | Special Weather Statement | DTX | 48 min |
| Jul 11, 4:02 PM EDT | Severe Thunderstorm Warning | DTX | 43 min |
| Jul 12, 12:47 PM EDT | Flood Watch | DTX | 15 hr |
| Jul 13, 1:11 AM EDT | Areal Flood Advisory | DTX | 3 hr |
| Jul 14, 2:32 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 2:38 PM EDT | Severe Thunderstorm Warning | DTX | 67 min |
| Jul 14, 3:02 PM EDT | Tornado Warning | DTX | 43 min |
| Jul 14, 5:00 PM EDT | Severe Thunderstorm Warning | DTX | 30 min |
| Jul 14, 5:39 PM EDT | Special Weather Statement | DTX | 51 min |
| Jul 20, 12:16 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 20, 2:33 PM EDT | Severe Thunderstorm Warning | DTX | 61 min |
| Jul 20, 2:51 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jul 20, 7:45 PM EDT | Special Weather Statement | DTX | 75 min |
| Jul 26, 1:45 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jul 26, 2:03 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 26, 4:06 PM EDT | Severe Thunderstorm Warning | DTX | 39 min |
| Jul 28, 8:44 PM EDT | Severe Thunderstorm Warning | DTX | 61 min |
| Aug 3, 5:49 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 3, 7:47 PM EDT | Severe Thunderstorm Warning | DTX | 45 min |
| Aug 3, 8:33 PM EDT | Special Weather Statement | DTX | 42 min |
| Aug 3, 10:03 PM EDT | Special Weather Statement | DTX | 42 min |
| Aug 11, 8:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Aug 11, 8:45 PM EDT | Severe Thunderstorm Warning | DTX | 60 min |
| Aug 17, 6:11 PM EDT | Special Weather Statement | DTX | 64 min |
| Aug 23, 6:14 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 23, 8:54 AM EDT | Severe Thunderstorm Warning | DTX | 66 min |
| Aug 24, 12:28 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 24, 6:35 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 24, 8:08 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Aug 24, 8:29 PM EDT | Severe Thunderstorm Warning | DTX | 35 min |
| Aug 24, 9:23 PM EDT | Severe Thunderstorm Warning | DTX | 25 min |
| Aug 24, 9:36 PM EDT | Areal Flood Advisory | DTX | 2 hr |
| Aug 29, 6:07 PM EDT | Special Weather Statement | DTX | 68 min |
| Sep 6, 9:56 PM EDT | Special Weather Statement | DTX | 64 min |
| Sep 30, 1:35 AM EDT | Dense Fog Advisory | DTX | 10 hr |
| Nov 6, 11:42 AM EST | Special Weather Statement | DTX | 63 min |
| Dec 24, 6:42 PM EST | Dense Fog Advisory | DTX | 9 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 | 12 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 15 |
| Special Weather Statement | 21 |
| Flooding | |
| Flood Watch | 2 |
| Areal Flood Advisory | 5 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 6 |
| Cold | |
| Freeze Warning | 4 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20222024
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.