Alert archive / Michigan / Ontonagon County
Weather alerts in Ontonagon County, Michigan, 2011
88 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Ontonagon County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 88
- Warnings
- 26
- Watches
- 15
- Advisories
- 35
- Busiest month
- May13 alerts
- Busiest day
- May 30, 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.
0 of 1 tornado reports fell inside a warning.
Ontonagon County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 1 | 0% | |||
| Severe thunderstorm warnings | 18 | 6 | 67% | 10 | 100% | 29 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Marquette, MI: tornado warnings | 3 | 0 | 100% | 1 | 0% | |
| NWS Marquette, MI: severe thunderstorm warnings | 82 | 30 | 63% | 80 | 63% | 22 min |
| NWS Marquette, MI: flash flood warnings | 1 | 0 | 100% | 5 | 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, 4:31 PM EST | Lake Effect Snow Advisory | MQT | 12 hr |
| Jan 4, 3:42 PM EST | Lake Effect Snow Watch | MQT | 49 hr |
| Jan 5, 4:48 PM EST | Lake Effect Snow Advisory | MQT | 53 hr |
| Jan 6, 4:34 PM EST | Lake Effect Snow Warning | MQT | 62 hr |
| Jan 11, 5:02 PM EST | Lake Effect Snow Advisory | MQT | 11 hr |
| Jan 12, 3:53 AM EST | Lake Effect Snow Warning | MQT | 15 hr |
| Jan 14, 4:10 AM EST | Winter Weather Advisory | MQT | 27 hr |
| Jan 15, 4:36 AM EST | Lake Effect Snow Advisory | MQT | 32 hr |
| Jan 17, 7:46 PM EST | Lake Effect Snow Advisory | MQT | 17 hr |
| Jan 20, 5:02 AM EST | Lake Effect Snow Advisory | MQT | 72 hr |
| Jan 20, 9:52 PM EST | Lake Effect Snow Warning | MQT | 7 hr |
| Jan 28, 4:07 AM EST | Winter Weather Advisory | MQT | 24 hr |
| Feb 6, 4:39 AM EST | Lake Effect Snow Advisory | MQT | 4 days |
| Feb 8, 5:13 AM EST | Lake Effect Snow Watch | MQT | 11 hr |
| Feb 9, 3:59 PM EST | Wind Chill Advisory | MQT | 18 hr |
| Feb 17, 5:05 AM EST | High Wind Warning | MQT | 47 hr |
| Feb 17, 5:05 AM EST | Wind Advisory | MQT | 47 hr |
| Mar 8, 3:59 PM EST | Winter Weather Advisory | MQT | 27 hr |
| Mar 20, 4:32 PM EDT | Winter Storm Watch | MQT | 37 hr |
| Mar 22, 5:42 AM EDT | Winter Storm Warning | MQT | 32 hr |
| Apr 2, 4:47 PM EDT | Winter Weather Advisory | MQT | 36 hr |
| Apr 10, 4:19 PM EDT | Tornado Watch | SPC | 7 hr |
| Apr 10, 7:02 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Apr 10, 8:43 PM EDT | Severe Thunderstorm Warning | MQT | 13 min |
| Apr 15, 4:56 AM EDT | Winter Weather Advisory | MQT | 63 hr |
| Apr 26, 7:39 PM EDT | Winter Weather Advisory | MQT | 6 hr |
| May 11, 3:21 AM EDT | Severe Thunderstorm Warning | MQT | 39 min |
| May 22, 4:43 PM EDT | Tornado Watch | SPC | 5 hr |
| May 22, 5:22 PM EDT | Severe Thunderstorm Warning | MQT | 53 min |
| May 24, 4:33 AM EDT | Frost Advisory | MQT | 27 hr |
| May 26, 4:35 AM EDT | Freeze Watch | MQT | 10 hr |
| May 26, 3:00 PM EDT | Freeze Warning | MQT | 18 hr |
| May 30, 12:20 PM EDT | Areal Flood Advisory | MQT | 4 hr |
| May 30, 3:10 PM EDT | Mesoscale Discussion | SPC | 95 min |
| May 30, 4:29 PM EDT | Severe Thunderstorm Warning | MQT | 46 min |
| May 30, 5:41 PM EDT | Severe Thunderstorm Warning | MQT | 49 min |
| May 31, 4:58 AM EDT | High Wind Watch | MQT | 7 hr |
| May 31, 12:02 PM EDT | High Wind Warning | MQT | 32 hr |
| May 31, 1:00 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 3, 10:07 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jun 3, 11:49 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 4, 12:34 AM EDT | Severe Thunderstorm Warning | MQT | 56 min |
| Jun 7, 2:32 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 7, 3:23 AM EDT | Severe Thunderstorm Warning | MQT | 67 min |
| Jun 7, 4:02 AM EDT | Severe Thunderstorm Warning | MQT | 43 min |
| Jun 21, 4:11 PM EDT | Flash Flood Watch | MQT | 19 hr |
| Jun 27, 4:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 1, 9:07 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 1, 11:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jul 2, 12:38 AM EDT | Mesoscale Discussion | SPC | 97 min |
| Jul 16, 4:24 PM EDT | Heat Advisory | MQT | 28 hr |
| Jul 19, 3:55 PM EDT | Heat Advisory | MQT | 29 hr |
| Jul 20, 7:03 AM EDT | Areal Flood Advisory | MQT | 4 hr |
| Jul 20, 7:55 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jul 30, 1:56 PM EDT | Severe Thunderstorm Warning | MQT | 49 min |
| Jul 30, 2:04 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 30, 2:09 PM EDT | Severe Thunderstorm Warning | MQT | 66 min |
| Jul 30, 2:50 PM EDT | Severe Thunderstorm Warning | MQT | 55 min |
| Aug 19, 7:45 AM EDT | Severe Thunderstorm Warning | MQT | 60 min |
| Aug 19, 8:21 AM EDT | Severe Thunderstorm Warning | MQT | 39 min |
| Sep 5, 4:11 AM EDT | Frost Advisory | MQT | 29 hr |
| Sep 12, 2:15 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 12, 6:31 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Sep 12, 7:27 PM EDT | Severe Thunderstorm Warning | MQT | 63 min |
| Sep 12, 7:57 PM EDT | Severe Thunderstorm Warning | MQT | 63 min |
| Sep 12, 8:09 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Sep 12, 8:30 PM EDT | Severe Thunderstorm Warning | MQT | 30 min |
| Sep 12, 8:54 PM EDT | Areal Flood Advisory | MQT | 2 hr |
| Sep 13, 9:03 PM EDT | Wind Advisory | MQT | 14 hr |
| Sep 15, 4:55 AM EDT | Freeze Warning | MQT | 28 hr |
| Sep 27, 10:19 PM EDT | Dense Fog Advisory | MQT | 13 hr |
| Sep 28, 5:15 AM EDT | High Wind Watch | MQT | 11 hr |
| Sep 28, 4:08 PM EDT | Wind Advisory | MQT | 40 hr |
| Oct 14, 5:07 AM EDT | Wind Advisory | MQT | 43 hr |
| Oct 16, 4:59 AM EDT | Wind Advisory | MQT | 31 hr |
| Nov 7, 3:23 PM EST | Winter Storm Watch | MQT | 37 hr |
| Nov 9, 4:22 PM EST | Lake Effect Snow Advisory | MQT | 27 hr |
| Nov 15, 11:52 AM EST | Winter Weather Advisory | MQT | 28 hr |
| Nov 16, 3:50 PM EST | Lake Effect Snow Advisory | MQT | 25 hr |
| Nov 18, 3:53 PM EST | Winter Weather Advisory | MQT | 35 hr |
| Nov 19, 4:40 AM EST | Winter Storm Warning | MQT | 22 hr |
| Nov 19, 2:05 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 3, 5:06 AM EST | Winter Weather Advisory | MQT | 29 hr |
| Dec 6, 3:33 PM EST | Lake Effect Snow Watch | MQT | 24 hr |
| Dec 7, 3:45 PM EST | Lake Effect Snow Warning | MQT | 51 hr |
| Dec 12, 8:52 PM EST | Freezing Rain Advisory | MQT | 14 hr |
| Dec 15, 4:25 AM EST | Winter Weather Advisory | MQT | 22 hr |
| Dec 26, 4:02 PM EST | Lake Effect Snow Advisory | MQT | 19 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
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.