Alert archive / Michigan / Livingston County
Weather alerts in Livingston County, Michigan, 2012
84 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Livingston County and its neighbors
Each county as a circle sized by its count in 2012. Tap one for its archive.
- Alerts
- 84
- Warnings
- 28
- Watches
- 12
- Advisories
- 22
- Busiest month
- March19 alerts
- Busiest day
- July 3, 20126 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
2 of 2 tornado warnings covering Livingston County in 2012 had a tornado report inside them.
Livingston County, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 2 | 0% | 0 | ||
| Severe thunderstorm warnings | 9 | 6 | 33% | 4 | 75% | 38 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Detroit, MI: tornado warnings | 11 | 6 | 45% | 7 | 71% | 13 min |
| NWS Detroit, MI: severe thunderstorm warnings | 112 | 69 | 38% | 198 | 81% | 28 min |
| NWS Detroit, MI: flash flood warnings | 6 | 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 1, 3:21 AM EST | Wind Advisory | DTX | 18 hr |
| Jan 17, 12:25 AM EST | Dense Fog Advisory | DTX | 8 hr |
| Feb 22, 3:37 PM EST | Winter Storm Watch | DTX | 23 hr |
| Feb 23, 2:51 PM EST | Winter Storm Warning | DTX | 25 hr |
| Feb 23, 2:51 PM EST | Winter Weather Advisory | DTX | 25 hr |
| Feb 28, 4:30 PM EST | Winter Weather Advisory | DTX | 21 hr |
| Mar 2, 4:57 AM EST | High Wind Watch | DTX | 14 hr |
| Mar 2, 6:52 PM EST | High Wind Warning | DTX | 12 hr |
| Mar 12, 6:29 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Mar 12, 7:36 PM EDT | Tornado Watch | SPC | 7 hr |
| Mar 12, 8:43 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Mar 15, 3:52 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Mar 15, 4:09 PM EDT | Severe Thunderstorm Warning | DTX | 81 min |
| Mar 15, 4:28 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 15, 5:07 PM EDT | Tornado Warning | DTX | 53 min |
| Mar 15, 5:44 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Mar 15, 8:02 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Mar 16, 7:16 AM EDT | Dense Fog Advisory | DTX | 5 hr |
| Mar 19, 2:02 AM EDT | Dense Fog Advisory | DTX | 7 hr |
| Mar 22, 6:22 PM EDT | Areal Flood Advisory | DTX | 3 hr |
| Mar 22, 6:32 PM EDT | Severe Thunderstorm Warning | DTX | 22 min |
| Mar 25, 4:02 PM EDT | Frost Advisory | DTX | 18 hr |
| Mar 26, 3:59 AM EDT | Freeze Watch | DTX | 6 hr |
| Mar 26, 10:26 AM EDT | Freeze Warning | DTX | 23 hr |
| Mar 30, 3:28 PM EDT | Freeze Warning | DTX | 13 hr |
| Apr 4, 4:09 PM EDT | Freeze Warning | DTX | 11 hr |
| Apr 5, 4:05 AM EDT | Freeze Watch | DTX | 11 hr |
| Apr 5, 2:57 PM EDT | Freeze Warning | DTX | 17 hr |
| Apr 6, 11:14 AM EDT | Freeze Warning | DTX | 21 hr |
| Apr 10, 3:49 PM EDT | Freeze Warning | DTX | 15 hr |
| Apr 11, 7:52 AM EDT | Freeze Warning | DTX | 24 hr |
| Apr 12, 3:04 PM EDT | Frost Advisory | DTX | 17 hr |
| Apr 16, 3:47 AM EDT | Wind Advisory | DTX | 16 hr |
| Apr 17, 1:32 PM EDT | Frost Advisory | DTX | 18 hr |
| Apr 26, 4:01 AM EDT | Freeze Warning | DTX | 28 hr |
| Apr 28, 3:25 PM EDT | Freeze Warning | DTX | 18 hr |
| May 2, 2:57 PM EDT | Mesoscale Discussion | SPC | 93 min |
| May 3, 2:35 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 3, 4:33 PM EDT | Mesoscale Discussion | SPC | 57 min |
| May 3, 6:57 PM EDT | Mesoscale Discussion | SPC | 63 min |
| May 3, 8:36 PM EDT | Mesoscale Discussion | SPC | 24 min |
| May 3, 10:54 PM EDT | Severe Thunderstorm Warning | DTX | 49 min |
| May 4, 2:09 AM EDT | Areal Flood Advisory | DTX | 4 hr |
| Jun 18, 10:33 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 21, 3:31 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Jun 27, 3:27 PM EDT | Heat Advisory | DTX | 48 hr |
| Jul 2, 4:01 PM EDT | Excessive Heat Watch | DTX | 59 hr |
| Jul 3, 4:02 AM EDT | Heat Advisory | DTX | 24 hr |
| Jul 3, 5:38 AM EDT | Severe Thunderstorm Warning | DTX | 67 min |
| Jul 3, 4:01 PM EDT | Severe Thunderstorm Warning | DTX | 59 min |
| Jul 3, 4:34 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 3, 5:09 PM EDT | Severe Thunderstorm Warning | DTX | 66 min |
| Jul 3, 5:14 PM EDT | Severe Thunderstorm Warning | DTX | 36 min |
| Jul 4, 4:16 AM EDT | Excessive Heat Warning | DTX | 4 days |
| Jul 4, 4:42 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 5, 2:57 AM EDT | Mesoscale Discussion | SPC | 63 min |
| Jul 5, 3:04 AM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jul 5, 3:50 AM EDT | Severe Thunderstorm Warning | DTX | 70 min |
| Jul 5, 4:12 AM EDT | Mesoscale Discussion | SPC | 93 min |
| Jul 16, 4:13 PM EDT | Excessive Heat Watch | DTX | 12 hr |
| Jul 17, 3:46 AM EDT | Excessive Heat Warning | DTX | 16 hr |
| Jul 17, 5:55 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Jul 25, 9:28 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jul 25, 9:47 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 26, 2:40 AM EDT | Mesoscale Discussion | SPC | 65 min |
| Aug 4, 7:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 16, 11:01 AM EDT | Mesoscale Discussion | SPC | 89 min |
| Aug 16, 6:28 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Sep 5, 1:51 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Sep 23, 2:42 PM EDT | Frost Advisory | DTX | 17 hr |
| Oct 6, 3:50 PM EDT | Freeze Warning | DTX | 16 hr |
| Oct 7, 3:41 PM EDT | Freeze Warning | DTX | 16 hr |
| Oct 10, 9:12 PM EDT | Freeze Warning | DTX | 12 hr |
| Oct 11, 3:16 PM EDT | Freeze Warning | DTX | 15 hr |
| Oct 12, 3:26 PM EDT | Freeze Warning | DTX | 13 hr |
| Oct 14, 4:16 PM EDT | Severe Thunderstorm Warning | DTX | 59 min |
| Oct 29, 4:02 AM EDT | Wind Advisory | DTX | 33 hr |
| Nov 18, 12:33 AM EST | Dense Fog Advisory | DTX | 11 hr |
| Nov 18, 5:08 PM EST | Dense Fog Advisory | DTX | 17 hr |
| Dec 3, 6:03 AM EST | Dense Fog Advisory | DTX | 13 hr |
| Dec 21, 3:34 AM EST | Winter Weather Advisory | DTX | 10 hr |
| Dec 21, 2:13 PM EST | Wind Advisory | DTX | 11 hr |
| Dec 25, 4:03 PM EST | Winter Weather Advisory | DTX | 38 hr |
| Dec 26, 3:29 PM EST | Mesoscale Discussion | SPC | 3 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 | 9 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 22 |
| Flooding | |
| Areal Flood Advisory | 2 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 4 |
| Heat | |
| Excessive Heat Warning | 2 |
| Excessive Heat Watch | 2 |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 14 |
| Freeze Watch | 2 |
| Frost Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20112013
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.