Alert archive / Michigan / Arenac County
Weather alerts in Arenac County, Michigan, 2011
71 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Arenac County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 71
- Warnings
- 19
- Watches
- 13
- Advisories
- 20
- Busiest month
- April11 alerts
- Busiest day
- May 31, 20114 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Arenac County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 7 | 1 | 86% | 2 | 50% | 34 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Gaylord, MI: tornado warnings | 3 | 0 | 100% | 2 | 0% | |
| NWS Gaylord, MI: severe thunderstorm warnings | 85 | 25 | 71% | 86 | 62% | 22 min |
| NWS Gaylord, MI: flash flood warnings | 8 | 2 | 75% | 4 | 75% | 141 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 17, 11:45 AM EST | Winter Weather Advisory | APX | 23 hr |
| Jan 31, 1:10 PM EST | Winter Storm Watch | APX | 22 hr |
| Feb 1, 10:44 AM EST | Winter Storm Warning | APX | 26 hr |
| Feb 1, 7:28 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 2, 3:33 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 2, 4:21 AM EST | Blizzard Warning | APX | 9 hr |
| Feb 18, 4:16 AM EST | Wind Advisory | APX | 23 hr |
| Feb 19, 3:53 AM EST | Winter Storm Watch | APX | 23 hr |
| Feb 20, 3:16 AM EST | Winter Storm Warning | APX | 26 hr |
| Mar 4, 4:18 AM EST | Winter Weather Advisory | APX | 12 hr |
| Mar 4, 5:36 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 4, 8:38 PM EST | Winter Weather Advisory | APX | 14 hr |
| Mar 8, 3:51 PM EST | Winter Weather Advisory | APX | 31 hr |
| Mar 21, 4:09 AM EDT | Winter Storm Watch | APX | 30 hr |
| Mar 22, 9:52 AM EDT | Winter Storm Warning | APX | 34 hr |
| Mar 22, 9:57 PM EDT | Mesoscale Discussion | SPC | 5 hr |
| Apr 4, 8:58 AM EDT | River Flood Warning | APX | 31 hr |
| Apr 10, 5:51 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Apr 10, 6:20 PM EDT | Tornado Watch | SPC | 7 hr |
| Apr 10, 8:36 PM EDT | River Flood Warning | APX | 35 hr |
| Apr 16, 4:34 PM EDT | Wind Advisory | APX | 29 hr |
| Apr 19, 4:13 AM EDT | Winter Weather Advisory | APX | 24 hr |
| Apr 26, 10:28 AM EDT | River Flood Warning | APX | 4 days |
| Apr 26, 3:02 PM EDT | Tornado Watch | SPC | 7 hr |
| Apr 26, 6:01 PM EDT | Severe Thunderstorm Warning | APX | 44 min |
| Apr 26, 8:15 PM EDT | Severe Thunderstorm Warning | APX | 45 min |
| Apr 26, 8:33 PM EDT | Mesoscale Discussion | SPC | 57 min |
| May 11, 2:16 PM EDT | Mesoscale Discussion | SPC | 119 min |
| May 15, 3:48 AM EDT | Freeze Warning | APX | 28 hr |
| May 22, 3:15 PM EDT | Mesoscale Discussion | SPC | 60 min |
| May 23, 12:35 PM EDT | Mesoscale Discussion | SPC | 85 min |
| May 31, 1:56 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 31, 3:54 PM EDT | Wind Advisory | APX | 29 hr |
| May 31, 6:47 PM EDT | Severe Thunderstorm Warning | APX | 43 min |
| May 31, 7:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 1, 2:49 PM EDT | Red Flag Warning | APX | 6 hr |
| Jun 8, 12:08 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 21, 4:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jun 21, 4:57 PM EDT | Tornado Watch | SPC | 7 hr |
| Jun 21, 8:12 PM EDT | Flash Flood Watch | APX | 14 hr |
| Jun 22, 11:46 AM EDT | Mesoscale Discussion | SPC | 119 min |
| Jun 22, 1:14 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 22, 4:35 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 2, 2:24 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 2, 4:17 PM EDT | Severe Thunderstorm Warning | APX | 36 min |
| Jul 2, 4:49 PM EDT | Severe Thunderstorm Warning | APX | 39 min |
| Jul 19, 4:21 AM EDT | Dense Fog Advisory | APX | 7 hr |
| Jul 19, 4:21 AM EDT | Heat Advisory | APX | 55 hr |
| Jul 21, 11:14 AM EDT | Heat Advisory | APX | 11 hr |
| Jul 24, 7:27 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Aug 2, 2:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Aug 7, 3:58 PM EDT | Flash Flood Warning | APX | 3 hr |
| Aug 24, 6:00 PM EDT | Tornado Watch | SPC | 5 hr |
| Aug 24, 8:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Sep 1, 6:54 AM EDT | Dense Fog Advisory | APX | 3 hr |
| Sep 2, 12:09 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Sep 3, 10:45 AM EDT | Mesoscale Discussion | SPC | 60 min |
| Sep 3, 10:50 AM EDT | Severe Thunderstorm Warning | APX | 55 min |
| Sep 5, 3:38 AM EDT | Frost Advisory | APX | 28 hr |
| Sep 6, 3:30 PM EDT | Frost Advisory | APX | 17 hr |
| Sep 15, 4:07 AM EDT | Freeze Warning | APX | 28 hr |
| Sep 16, 3:52 PM EDT | Frost Advisory | APX | 15 hr |
| Sep 26, 7:55 AM EDT | Severe Thunderstorm Warning | APX | 36 min |
| Sep 29, 6:17 AM EDT | Dense Fog Advisory | APX | 5 hr |
| Oct 14, 4:05 PM EDT | Wind Advisory | APX | 30 hr |
| Oct 18, 4:20 PM EDT | High Wind Watch | APX | 19 hr |
| Oct 19, 4:13 AM EDT | High Wind Warning | APX | 24 hr |
| Oct 19, 11:49 AM EDT | Wind Advisory | APX | 24 hr |
| Oct 30, 4:14 AM EDT | Dense Fog Advisory | APX | 8 hr |
| Nov 9, 11:16 AM EST | Wind Advisory | APX | 18 hr |
| Nov 29, 8:55 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 | 7 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 19 |
| Flooding | |
| Flash Flood Warning | 1 |
| River Flood Warning | 3 |
| Flash Flood Watch | 1 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 5 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 2 |
| Frost Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 6 |
| Fire | |
| Red Flag Warning | 1 |
| 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 archive20102012
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.