Alert archive / Michigan / Ontonagon County
Weather alerts in Ontonagon County, Michigan, 2009
71 weather alerts in 2009, 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 2009. Tap one for its archive.
- Alerts
- 71
- Warnings
- 22
- Watches
- 11
- Advisories
- 34
- Busiest month
- December21 alerts
- Busiest day
- September 27, 20093 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Ontonagon County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 3 | 1 | 67% | 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 Marquette, MI: tornado warnings | 1 | 0 | 100% | 0 | ||
| NWS Marquette, MI: severe thunderstorm warnings | 14 | 3 | 79% | 9 | 44% | 13 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 1, 3:51 PM EST | Lake Effect Snow Advisory | MQT | 31 hr |
| Jan 2, 4:23 AM EST | Winter Storm Watch | MQT | 24 hr |
| Jan 2, 9:22 AM EST | Lake Effect Snow Warning | MQT | 10 hr |
| Jan 3, 4:24 AM EST | Winter Storm Warning | MQT | 62 hr |
| Jan 8, 7:14 AM EST | Lake Effect Snow Warning | MQT | 16 hr |
| Jan 8, 9:28 AM EST | Lake Effect Snow Advisory | MQT | 29 hr |
| Jan 12, 4:47 AM EST | Winter Weather Advisory | MQT | 35 hr |
| Jan 13, 4:29 PM EST | Wind Chill Watch | MQT | 13 hr |
| Jan 13, 10:36 PM EST | Wind Chill Advisory | MQT | 59 hr |
| Jan 14, 5:02 AM EST | Wind Chill Warning | MQT | 55 hr |
| Jan 17, 6:42 AM EST | Lake Effect Snow Advisory | MQT | 18 hr |
| Jan 18, 12:29 AM EST | Lake Effect Snow Warning | MQT | 37 hr |
| Jan 19, 3:34 PM EST | Lake Effect Snow Warning | MQT | 17 hr |
| Jan 22, 5:45 AM EST | Winter Weather Advisory | MQT | 3 days |
| Jan 23, 4:32 AM EST | Wind Chill Advisory | MQT | 55 hr |
| Jan 24, 4:02 PM EST | Wind Chill Advisory | MQT | 44 hr |
| Jan 31, 2:56 PM EST | Wind Advisory | MQT | 25 hr |
| Feb 1, 3:58 PM EST | Lake Effect Snow Advisory | MQT | 48 hr |
| Feb 9, 10:53 AM EST | Freezing Rain Advisory | MQT | 3 hr |
| Feb 17, 4:55 AM EST | Winter Weather Advisory | MQT | 53 hr |
| Feb 24, 4:27 PM EST | Winter Storm Watch | MQT | 36 hr |
| Feb 26, 4:53 AM EST | Winter Storm Warning | MQT | 24 hr |
| Feb 26, 4:53 AM EST | Winter Weather Advisory | MQT | 36 hr |
| Mar 8, 4:41 PM EDT | Winter Storm Watch | MQT | 36 hr |
| Mar 10, 4:35 AM EDT | Winter Storm Warning | MQT | 36 hr |
| Mar 20, 10:33 PM EDT | Winter Weather Advisory | MQT | 10 hr |
| Mar 30, 3:54 PM EDT | Winter Weather Advisory | MQT | 24 hr |
| Apr 19, 3:58 PM EDT | Winter Storm Warning | MQT | 52 hr |
| Apr 19, 3:58 PM EDT | Winter Weather Advisory | MQT | 46 hr |
| Apr 24, 8:42 PM EDT | Mesoscale Discussion | SPC | 63 min |
| May 19, 3:11 PM EDT | Red Flag Warning | MQT | 31 hr |
| May 20, 9:04 AM EDT | Wind Advisory | MQT | 13 hr |
| May 24, 2:25 PM EDT | Frost Advisory | MQT | 17 hr |
| May 25, 12:39 PM EDT | Red Flag Warning | MQT | 8 hr |
| May 29, 4:18 PM EDT | Freeze Watch | MQT | 12 hr |
| May 30, 3:59 AM EDT | Freeze Warning | MQT | 27 hr |
| Jun 2, 3:37 PM EDT | Freeze Warning | MQT | 15 hr |
| Jun 3, 4:11 PM EDT | Frost Advisory | MQT | 16 hr |
| Jun 3, 4:11 PM EDT | Fire Weather Watch | MQT | 17 hr |
| Jun 5, 4:19 PM EDT | Frost Advisory | MQT | 15 hr |
| Jun 13, 3:58 PM EDT | Severe Thunderstorm Warning | MQT | 62 min |
| Aug 9, 2:01 AM EDT | Severe Thunderstorm Warning | MQT | 44 min |
| Aug 9, 2:38 AM EDT | Severe Thunderstorm Warning | MQT | 67 min |
| Aug 30, 4:14 AM EDT | Frost Advisory | MQT | 28 hr |
| Sep 27, 5:34 AM EDT | Lakeshore Flood Statement | MQT | 4 days |
| Sep 27, 3:54 PM EDT | Wind Advisory | MQT | 36 hr |
| Sep 27, 4:00 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 28, 4:28 PM EDT | Freeze Watch | MQT | 11 hr |
| Sep 29, 3:39 AM EDT | Freeze Warning | MQT | 29 hr |
| Oct 23, 5:15 AM EDT | Winter Weather Advisory | MQT | 27 hr |
| Dec 2, 4:35 AM EST | Winter Weather Advisory | MQT | 12 hr |
| Dec 2, 4:15 PM EST | Lake Effect Snow Advisory | MQT | 42 hr |
| Dec 3, 4:14 AM EST | Lake Effect Snow Watch | MQT | 13 hr |
| Dec 3, 5:05 PM EST | Lake Effect Snow Warning | MQT | 28 hr |
| Dec 5, 4:23 AM EST | Lake Effect Snow Advisory | MQT | 25 hr |
| Dec 6, 4:45 PM EST | Winter Storm Watch | MQT | 24 hr |
| Dec 7, 4:43 AM EST | Lake Effect Snow Advisory | MQT | 26 hr |
| Dec 7, 4:18 PM EST | Winter Storm Warning | MQT | 60 hr |
| Dec 8, 4:55 AM EST | Lakeshore Flood Statement | MQT | 51 hr |
| Dec 10, 4:38 AM EST | Lake Effect Snow Warning | MQT | 47 hr |
| Dec 10, 4:38 AM EST | Lake Effect Snow Advisory | MQT | 16 hr |
| Dec 10, 4:51 AM EST | Wind Chill Advisory | MQT | 30 hr |
| Dec 11, 4:26 AM EST | Lake Effect Snow Advisory | MQT | 7 hr |
| Dec 14, 4:28 PM EST | Lake Effect Snow Advisory | MQT | 42 hr |
| Dec 21, 2:20 PM EST | Lake Effect Snow Advisory | MQT | 7 hr |
| Dec 22, 4:38 PM EST | Winter Storm Watch | MQT | 24 hr |
| Dec 23, 4:32 PM EST | Winter Weather Advisory | MQT | 53 hr |
| Dec 24, 12:01 PM EST | Winter Storm Warning | MQT | 23 hr |
| Dec 27, 3:55 PM EST | Lake Effect Snow Advisory | MQT | 39 hr |
| Dec 30, 4:25 AM EST | Lake Effect Snow Watch | MQT | 11 hr |
| Dec 30, 3:50 PM EST | Lake Effect Snow Warning | MQT | 63 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 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.