Alert archive / Michigan / Alcona County
Weather alerts in Alcona County, Michigan, 2010
40 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Alcona County and its neighbors
Each county as a circle sized by its count in 2010. Tap one for its archive.
- Alerts
- 40
- Warnings
- 15
- Watches
- 9
- Advisories
- 11
- Busiest month
- September9 alerts
- Busiest day
- September 21, 20104 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Alcona County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 4 | 2 | 50% | 2 | 100% | 15 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Gaylord, MI: tornado warnings | 5 | 1 | 80% | 3 | 33% | 11 min |
| NWS Gaylord, MI: severe thunderstorm warnings | 40 | 13 | 68% | 33 | 55% | 22 min |
| NWS Gaylord, MI: flash flood warnings | 3 | 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 14, 10:39 PM EST | Winter Weather Advisory | APX | 6 hr |
| Feb 26, 10:08 AM EST | Winter Weather Advisory | APX | 25 hr |
| Mar 31, 10:53 AM EDT | Red Flag Warning | APX | 9 hr |
| Mar 31, 3:28 PM EDT | Fire Weather Watch | APX | 37 hr |
| Apr 2, 4:38 AM EDT | Red Flag Warning | APX | 17 hr |
| Apr 14, 3:56 PM EDT | Fire Weather Watch | APX | 15 hr |
| Apr 15, 7:11 AM EDT | Red Flag Warning | APX | 13 hr |
| May 6, 3:57 PM EDT | Freeze Warning | APX | 14 hr |
| May 8, 3:45 PM EDT | Freeze Warning | APX | 17 hr |
| May 9, 11:04 AM EDT | Freeze Warning | APX | 22 hr |
| May 18, 3:51 PM EDT | Frost Advisory | APX | 12 hr |
| May 18, 4:18 PM EDT | Red Flag Warning | APX | 6 hr |
| May 22, 9:59 PM EDT | Dense Fog Advisory | APX | 11 hr |
| May 26, 3:50 AM EDT | Fire Weather Watch | APX | 24 hr |
| May 31, 9:52 AM EDT | Severe Thunderstorm Warning | APX | 53 min |
| Jun 28, 11:45 AM EDT | Mesoscale Discussion | SPC | 60 min |
| Jul 15, 1:30 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 18, 8:32 PM EDT | Flash Flood Warning | APX | 2 hr |
| Aug 10, 4:19 AM EDT | Dense Fog Advisory | APX | 6 hr |
| Aug 15, 1:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 20, 6:26 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Aug 20, 9:33 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Sep 6, 3:52 PM EDT | Wind Advisory | APX | 29 hr |
| Sep 19, 4:08 PM EDT | Frost Advisory | APX | 16 hr |
| Sep 21, 1:53 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 21, 3:31 PM EDT | Severe Thunderstorm Warning | APX | 31 min |
| Sep 21, 4:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Sep 21, 5:35 PM EDT | Severe Thunderstorm Warning | APX | 40 min |
| Sep 21, 8:08 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Sep 21, 8:26 PM EDT | Severe Thunderstorm Warning | APX | 36 min |
| Sep 23, 4:15 PM EDT | Wind Advisory | APX | 36 hr |
| Oct 8, 4:21 AM EDT | Red Flag Warning | APX | 15 hr |
| Oct 24, 4:21 PM EDT | High Wind Watch | APX | 23 hr |
| Oct 25, 3:32 PM EDT | High Wind Warning | APX | 58 hr |
| Oct 26, 11:04 AM EDT | Tornado Watch | SPC | 4 hr |
| Oct 27, 7:42 PM EDT | Wind Advisory | APX | 6 hr |
| Nov 9, 1:31 AM EST | Dense Fog Advisory | APX | 10 hr |
| Dec 10, 4:28 AM EST | Winter Storm Watch | APX | 36 hr |
| Dec 11, 4:13 PM EST | Winter Storm Warning | APX | 36 hr |
| Dec 29, 9:57 PM EST | Freezing Rain Advisory | APX | 12 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 | 4 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 5 |
| Flooding | |
| Flash Flood Warning | 1 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 2 |
| Cold | |
| Freeze Warning | 3 |
| Frost Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 3 |
| Fire | |
| Red Flag Warning | 5 |
| Fire Weather Watch | 3 |
| 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 archive20092011
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.