Alert archive / Michigan / Lapeer County
Weather alerts in Lapeer County, Michigan, 2019
96 weather alerts in 2019, 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 2019. Tap one for its archive.
- Alerts
- 96
- Warnings
- 17
- Watches
- 9
- Advisories
- 22
- Busiest month
- July16 alerts
- Busiest day
- March 14, 20198 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Lapeer County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 12 | 8 | 33% | 7 | 29% | 23 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 2, 2:55 PM EST | Winter Weather Advisory | DTX | 6 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 22, 3:05 AM EST | Winter Weather Advisory | DTX | 33 hr |
| Jan 27, 3:43 AM EST | Winter Storm Warning | DTX | 40 hr |
| Jan 28, 8:18 AM EST | Mesoscale Discussion | SPC | 4 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 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 Weather Advisory | DTX | 48 hr |
| Feb 12, 2:40 AM EST | Mesoscale Discussion | SPC | 6 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 10, 3:03 AM EDT | Wind Advisory | DTX | 13 hr |
| Mar 14, 5:13 PM EDT | Special Weather Statement | DTX | 17 min |
| Mar 14, 5:29 PM EDT | Special Weather Statement | DTX | 16 min |
| Mar 14, 5:51 PM EDT | Special Weather Statement | DTX | 114 min |
| Mar 14, 5:54 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Mar 14, 6:08 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Mar 14, 7:22 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Mar 14, 7:34 PM EDT | Severe Thunderstorm Warning | DTX | 41 min |
| Mar 14, 7:46 PM EDT | Severe Thunderstorm Warning | DTX | 74 min |
| May 10, 12:44 PM EDT | Frost Advisory | DTX | 19 hr |
| May 19, 2:29 PM EDT | Severe Thunderstorm Warning | DTX | 17 min |
| May 25, 1:41 AM EDT | Special Weather Statement | DTX | 2 hr |
| May 25, 2:59 AM EDT | Special Weather Statement | DTX | 2 hr |
| May 25, 4:45 AM EDT | Areal Flood Advisory | DTX | 8 hr |
| May 25, 9:15 AM EDT | Areal Flood Advisory | DTX | 3 hr |
| May 25, 2:22 PM EDT | Special Weather Statement | DTX | 53 min |
| May 25, 2:44 PM EDT | Special Weather Statement | DTX | 61 min |
| Jun 1, 2:15 PM EDT | Special Weather Statement | DTX | 60 min |
| Jun 1, 2:43 PM EDT | Severe Thunderstorm Warning | DTX | 45 min |
| Jun 1, 8:01 PM EDT | Special Weather Statement | DTX | 3 hr |
| Jun 5, 7:07 AM EDT | Special Weather Statement | DTX | 53 min |
| Jun 28, 10:05 AM EDT | Special Weather Statement | DTX | 55 min |
| Jun 28, 7:05 PM EDT | Special Weather Statement | DTX | 25 min |
| Jun 28, 7:19 PM EDT | Severe Thunderstorm Warning | DTX | 56 min |
| Jul 2, 6:47 PM EDT | Special Weather Statement | DTX | 28 min |
| Jul 13, 5:25 PM EDT | Special Weather Statement | DTX | 65 min |
| Jul 15, 4:41 PM EDT | Special Weather Statement | DTX | 64 min |
| Jul 18, 4:12 AM EDT | Excessive Heat Warning | DTX | 63 hr |
| Jul 19, 6:29 PM EDT | Special Weather Statement | DTX | 61 min |
| 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, 5:56 PM EDT | Special Weather Statement | DTX | 64 min |
| Jul 20, 6:09 PM EDT | Severe Thunderstorm Warning | DTX | 28 min |
| Jul 28, 4:15 PM EDT | Special Weather Statement | DTX | 60 min |
| Jul 28, 4:40 PM EDT | Special Weather Statement | DTX | 50 min |
| Jul 28, 6:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jul 29, 2:11 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 29, 2:16 PM EDT | Special Weather Statement | DTX | 59 min |
| Jul 29, 3:27 PM EDT | Special Weather Statement | DTX | 63 min |
| Aug 8, 3:14 AM EDT | Special Weather Statement | DTX | 46 min |
| Aug 18, 12:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Aug 18, 1:18 PM EDT | Special Weather Statement | DTX | 42 min |
| Aug 18, 1:49 PM EDT | Severe Thunderstorm Warning | DTX | 56 min |
| Aug 20, 8:30 PM EDT | Special Weather Statement | DTX | 60 min |
| Sep 3, 10:13 PM EDT | Special Weather Statement | DTX | 32 min |
| Sep 10, 6:28 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Sep 10, 9:09 PM EDT | Special Weather Statement | DTX | 36 min |
| Sep 10, 9:57 PM EDT | Special Weather Statement | DTX | 63 min |
| Sep 11, 2:31 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 11, 3:14 PM EDT | Special Weather Statement | DTX | 61 min |
| Sep 11, 3:21 PM EDT | Severe Thunderstorm Warning | DTX | 54 min |
| Sep 11, 3:50 PM EDT | Special Weather Statement | DTX | 55 min |
| Sep 11, 3:56 PM EDT | Severe Thunderstorm Warning | DTX | 20 min |
| Sep 11, 4:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Sep 11, 8:36 PM EDT | Areal Flood Advisory | DTX | 5 hr |
| Sep 13, 2:21 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Sep 13, 2:45 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 21, 5:54 PM EDT | Special Weather Statement | DTX | 66 min |
| Sep 21, 6:08 PM EDT | Severe Thunderstorm Warning | DTX | 32 min |
| Oct 1, 11:18 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 1, 1:02 PM EDT | Severe Thunderstorm Warning | DTX | 43 min |
| Oct 1, 2:55 PM EDT | Flood Watch | DTX | 24 hr |
| Oct 2, 12:42 AM EDT | Special Weather Statement | DTX | 63 min |
| Oct 2, 2:25 AM EDT | Special Weather Statement | DTX | 65 min |
| Oct 14, 3:04 AM EDT | Frost Advisory | DTX | 29 hr |
| Oct 17, 3:28 PM EDT | Freeze Warning | DTX | 17 hr |
| Oct 27, 4:32 AM EDT | Special Weather Statement | DTX | 58 min |
| Oct 27, 5:00 AM EDT | Special Weather Statement | DTX | 60 min |
| Oct 31, 3:10 AM EDT | Wind Advisory | DTX | 25 hr |
| Nov 10, 3:11 PM EST | Winter Weather Advisory | DTX | 36 hr |
| Nov 26, 2:32 PM EST | Wind Advisory | DTX | 30 hr |
| Nov 30, 3:23 AM EST | Winter Weather Advisory | DTX | 33 hr |
| Dec 3, 1:06 PM EST | Special Weather Statement | DTX | 69 min |
| Dec 29, 2:17 PM EST | Dense Fog Advisory | DTX | 7 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.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 12 |
| Severe Thunderstorm Watch | 5 |
| Mesoscale Discussion | 12 |
| Special Weather Statement | 36 |
| Flooding | |
| Flood Watch | 1 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 9 |
| Heat | |
| Excessive Heat Warning | 1 |
| Cold | |
| Freeze Warning | 1 |
| Wind Chill Warning | 1 |
| Wind Chill Watch | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 5 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
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.