Alert archive / Michigan / Tuscola County
Weather alerts in Tuscola County, Michigan, 2009
62 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Tuscola County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 62
- Warnings
- 12
- Watches
- 15
- Advisories
- 22
- Busiest month
- April12 alerts
- Busiest day
- April 25, 20096 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Tuscola County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 1 | 1 | 0% | 0 | ||
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Detroit, MI: tornado warnings | 5 | 0 | 100% | 0 | ||
| NWS Detroit, MI: severe thunderstorm warnings | 49 | 28 | 43% | 96 | 82% | 30 min |
| NWS Detroit, MI: flash flood warnings | 6 | 5 | 17% | 11 | 64% | 85 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 3, 3:42 PM EST | Freezing Rain Advisory | DTX | 22 hr |
| Jan 4, 6:56 AM EST | Mesoscale Discussion | SPC | 3 hr |
| Jan 12, 4:01 PM EST | Winter Weather Advisory | DTX | 19 hr |
| Jan 14, 11:46 AM EST | Wind Chill Watch | DTX | 39 hr |
| Jan 14, 11:46 AM EST | Wind Chill Advisory | DTX | 67 hr |
| Jan 16, 4:07 PM EST | Winter Storm Watch | DTX | 12 hr |
| Jan 17, 4:23 AM EST | Winter Storm Warning | DTX | 25 hr |
| Feb 4, 3:38 AM EST | Wind Chill Advisory | DTX | 31 hr |
| Feb 10, 3:52 PM EST | Flood Watch | DTX | 36 hr |
| Feb 11, 4:28 AM EST | Wind Advisory | DTX | 27 hr |
| Feb 11, 5:11 AM EST | Dense Fog Advisory | DTX | 7 hr |
| Feb 11, 2:22 PM EST | River Flood Warning | DTX | 3 days |
| Feb 12, 10:48 AM EST | River Flood Warning | DTX | 31 hr |
| Feb 19, 3:41 PM EST | Winter Storm Watch | DTX | 24 hr |
| Feb 20, 3:34 PM EST | Winter Storm Warning | DTX | 25 hr |
| Feb 21, 6:35 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Mar 10, 4:28 AM EDT | High Wind Watch | DTX | 11 hr |
| Mar 10, 3:51 PM EDT | High Wind Warning | DTX | 19 hr |
| Mar 10, 3:51 PM EDT | Wind Advisory | DTX | 24 hr |
| Apr 2, 9:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Apr 4, 4:03 PM EDT | Winter Storm Watch | DTX | 23 hr |
| Apr 5, 3:04 PM EDT | Winter Storm Warning | DTX | 17 hr |
| Apr 25, 10:23 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 25, 10:44 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 25, 11:55 AM EDT | Mesoscale Discussion | SPC | 95 min |
| Apr 25, 1:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Apr 25, 2:55 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Apr 25, 3:39 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 27, 3:57 PM EDT | Flood Watch | DTX | 15 hr |
| Apr 28, 10:06 PM EDT | River Flood Warning | DTX | 34 hr |
| Apr 30, 5:07 AM EDT | River Flood Warning | DTX | 6 days |
| May 10, 3:53 AM EDT | Frost Advisory | DTX | 28 hr |
| May 11, 1:33 PM EDT | Frost Advisory | DTX | 18 hr |
| May 14, 1:42 AM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 17, 3:20 PM EDT | Freeze Warning | DTX | 17 hr |
| May 28, 4:03 AM EDT | Dense Fog Advisory | DTX | 5 hr |
| May 30, 12:28 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 3, 3:54 PM EDT | Frost Advisory | DTX | 15 hr |
| Jun 8, 4:02 PM EDT | Tornado Watch | SPC | 6 hr |
| Jun 17, 1:02 PM EDT | Areal Flood Advisory | DTX | 3 hr |
| Jun 19, 2:57 AM EDT | Flash Flood Watch | DTX | 25 hr |
| Jun 25, 2:08 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 25, 6:22 PM EDT | Severe Thunderstorm Warning | DTX | 38 min |
| Jun 25, 7:09 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 5, 2:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Aug 9, 5:18 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Aug 9, 5:48 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 20, 2:00 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Sep 19, 8:06 PM EDT | Frost Advisory | DTX | 8 hr |
| Sep 27, 3:44 PM EDT | Wind Advisory | DTX | 30 hr |
| Sep 27, 10:46 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Sep 30, 4:40 AM EDT | Frost Advisory | DTX | 11 hr |
| Sep 30, 4:40 AM EDT | Freeze Warning | DTX | 27 hr |
| Oct 7, 2:04 AM EDT | Wind Advisory | DTX | 8 hr |
| Oct 10, 4:06 AM EDT | Freeze Warning | DTX | 29 hr |
| Oct 30, 4:11 PM EDT | Wind Advisory | DTX | 20 hr |
| Nov 8, 3:14 AM EST | Dense Fog Advisory | DTX | 6 hr |
| Nov 21, 9:34 PM EST | Dense Fog Advisory | DTX | 12 hr |
| Dec 8, 4:41 AM EST | Winter Weather Advisory | DTX | 29 hr |
| Dec 9, 12:09 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 9, 4:10 AM EST | Wind Advisory | DTX | 16 hr |
| Dec 24, 4:30 PM EST | Winter Weather Advisory | DTX | 20 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 | 1 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 13 |
| Flooding | |
| River Flood Warning | 4 |
| Flash Flood Watch | 1 |
| Flood Watch | 2 |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 3 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 3 |
| Cold | |
| Freeze Warning | 3 |
| Wind Chill Watch | 1 |
| Frost Advisory | 5 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
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.