Alert archive / Michigan / Cheboygan County
Weather alerts in Cheboygan 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.
Cheboygan County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 71
- Warnings
- 18
- Watches
- 15
- Advisories
- 29
- Busiest month
- December14 alerts
- Busiest day
- March 8, 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.
Cheboygan County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 0 | 0 | ||||
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Gaylord, MI: tornado warnings | 1 | 0 | 100% | 0 | ||
| NWS Gaylord, MI: severe thunderstorm warnings | 18 | 6 | 67% | 17 | 59% | 16 min |
| NWS Gaylord, MI: flash flood warnings | 2 | 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 1, 4:49 AM EST | Winter Weather Advisory | APX | 35 hr |
| Jan 3, 4:13 PM EST | Winter Weather Advisory | APX | 19 hr |
| Jan 4, 1:08 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 4, 6:56 AM EST | Mesoscale Discussion | SPC | 3 hr |
| Jan 11, 4:24 PM EST | Winter Storm Watch | APX | 23 hr |
| Jan 12, 3:38 PM EST | Winter Weather Advisory | APX | 25 hr |
| Jan 14, 4:10 PM EST | Wind Chill Advisory | APX | 19 hr |
| Jan 15, 10:43 PM EST | Wind Chill Advisory | APX | 13 hr |
| Jan 16, 4:24 PM EST | Winter Storm Watch | APX | 11 hr |
| Jan 17, 3:41 AM EST | Winter Weather Advisory | APX | 24 hr |
| Jan 19, 9:13 AM EST | Flood Watch | APX | 7 hr |
| Feb 4, 3:36 AM EST | Wind Chill Advisory | APX | 7 hr |
| Feb 11, 3:45 PM EST | Winter Weather Advisory | APX | 6 hr |
| Feb 16, 3:58 PM EST | Winter Storm Watch | APX | 43 hr |
| Feb 17, 4:17 PM EST | Winter Weather Advisory | APX | 36 hr |
| Feb 20, 4:12 PM EST | Winter Storm Warning | APX | 60 hr |
| Feb 20, 4:12 PM EST | Winter Weather Advisory | APX | 16 hr |
| Feb 25, 4:16 AM EST | Winter Storm Watch | APX | 24 hr |
| Feb 25, 4:16 AM EST | Winter Weather Advisory | APX | 12 hr |
| Feb 26, 4:17 AM EST | Winter Storm Warning | APX | 25 hr |
| Feb 26, 7:31 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Mar 8, 4:42 AM EDT | Winter Weather Advisory | APX | 24 hr |
| Mar 8, 4:33 PM EDT | Winter Storm Warning | APX | 12 hr |
| Mar 8, 7:42 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 10, 4:37 AM EDT | High Wind Watch | APX | 11 hr |
| Mar 10, 4:03 PM EDT | High Wind Warning | APX | 19 hr |
| Mar 11, 4:34 AM EDT | Winter Weather Advisory | APX | 18 hr |
| Mar 24, 6:20 AM EDT | Winter Weather Advisory | APX | 5 hr |
| Mar 27, 3:54 PM EDT | Winter Storm Watch | APX | 24 hr |
| Mar 28, 4:01 PM EDT | Winter Storm Warning | APX | 24 hr |
| Mar 29, 6:01 AM EDT | Mesoscale Discussion | SPC | 4 hr |
| May 4, 4:55 AM EDT | Fire Weather Watch | APX | 23 hr |
| May 5, 4:16 AM EDT | Red Flag Warning | APX | 16 hr |
| May 10, 3:35 AM EDT | Freeze Warning | APX | 28 hr |
| May 11, 12:46 PM EDT | Freeze Warning | APX | 19 hr |
| May 16, 4:25 PM EDT | Freeze Warning | APX | 16 hr |
| May 17, 4:04 PM EDT | Freeze Warning | APX | 16 hr |
| May 18, 3:57 PM EDT | Fire Weather Watch | APX | 24 hr |
| May 19, 4:02 PM EDT | Red Flag Warning | APX | 28 hr |
| May 24, 4:12 PM EDT | Frost Advisory | APX | 15 hr |
| May 30, 3:46 AM EDT | Freeze Watch | APX | 12 hr |
| May 30, 12:28 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 30, 4:10 PM EDT | Freeze Warning | APX | 16 hr |
| Jun 3, 2:50 PM EDT | Freeze Warning | APX | 16 hr |
| Jun 3, 4:18 PM EDT | Fire Weather Watch | APX | 37 hr |
| Jun 5, 5:25 AM EDT | Red Flag Warning | APX | 13 hr |
| Jun 18, 4:18 AM EDT | Dense Fog Advisory | APX | 5 hr |
| Jul 25, 7:00 PM EDT | Flash Flood Warning | APX | 2 hr |
| Aug 9, 3:13 PM EDT | Mesoscale Discussion | SPC | 32 min |
| Aug 9, 3:40 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 30, 3:48 AM EDT | Frost Advisory | APX | 28 hr |
| Aug 31, 3:35 PM EDT | Frost Advisory | APX | 16 hr |
| Sep 17, 1:53 AM EDT | Frost Advisory | APX | 7 hr |
| Sep 18, 3:44 PM EDT | Frost Advisory | APX | 17 hr |
| Sep 19, 3:55 PM EDT | Frost Advisory | APX | 16 hr |
| Nov 8, 3:16 AM EST | Dense Fog Advisory | APX | 3 hr |
| Nov 21, 9:06 PM EST | Dense Fog Advisory | APX | 13 hr |
| Dec 3, 4:45 AM EST | Winter Weather Advisory | APX | 24 hr |
| Dec 3, 4:16 PM EST | Lake Effect Snow Watch | APX | 12 hr |
| Dec 4, 4:35 AM EST | Lake Effect Snow Warning | APX | 36 hr |
| Dec 5, 4:46 PM EST | Lake Effect Snow Advisory | APX | 23 hr |
| Dec 6, 4:00 AM EST | Lake Effect Snow Warning | APX | 7 hr |
| Dec 7, 4:13 AM EST | Winter Storm Watch | APX | 12 hr |
| Dec 7, 4:21 PM EST | Winter Storm Warning | APX | 4 days |
| Dec 9, 12:09 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 9, 7:28 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 12, 11:26 PM EST | Flood Watch | APX | 17 hr |
| Dec 13, 4:21 AM EST | Winter Weather Advisory | APX | 6 hr |
| Dec 14, 9:14 AM EST | Winter Weather Advisory | APX | 7 hr |
| Dec 24, 10:15 AM EST | Winter Weather Advisory | APX | 16 hr |
| Dec 27, 3:44 PM EST | Winter Weather Advisory | APX | 36 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 Watch | 1 |
| Mesoscale Discussion | 9 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flood Watch | 2 |
| Winter | |
| Lake Effect Snow Warning | 2 |
| Winter Storm Warning | 5 |
| Lake Effect Snow Watch | 1 |
| Winter Storm Watch | 6 |
| Lake Effect Snow Advisory | 1 |
| Winter Weather Advisory | 16 |
| Cold | |
| Freeze Warning | 6 |
| Freeze Watch | 1 |
| Frost Advisory | 6 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Fire | |
| Red Flag Warning | 3 |
| 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 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.