Alert archive / Michigan / Alpena County
Weather alerts in Alpena County, Michigan, 2015
55 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Alpena County and its neighbors
Each county as a circle sized by its count in 2015. Tap one for its archive.
- Alerts
- 55
- Warnings
- 14
- Watches
- 6
- Advisories
- 17
- Busiest month
- May12 alerts
- Busiest day
- May 26, 20153 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Alpena County, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 4 | 1 | 75% | 3 | 67% | 26 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Gaylord, MI: tornado warnings | 3 | 1 | 67% | 2 | 50% | 10 min |
| NWS Gaylord, MI: severe thunderstorm warnings | 53 | 21 | 60% | 58 | 81% | 20 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 2, 3:10 PM EST | Winter Weather Advisory | APX | 3 days |
| Jan 6, 3:58 PM EST | Wind Chill Advisory | APX | 20 hr |
| Jan 7, 3:39 PM EST | Winter Weather Advisory | APX | 35 hr |
| Jan 29, 6:48 AM EST | Winter Weather Advisory | APX | 5 hr |
| Feb 8, 6:17 PM EST | Lake Effect Snow Advisory | APX | 9 hr |
| Feb 11, 3:57 PM EST | Wind Chill Advisory | APX | 21 hr |
| Feb 13, 4:50 AM EST | Wind Chill Warning | APX | 54 hr |
| Feb 13, 4:50 AM EST | Winter Weather Advisory | APX | 36 hr |
| Feb 15, 11:03 AM EST | Wind Chill Advisory | APX | 8 hr |
| Feb 18, 4:30 PM EST | Wind Chill Warning | APX | 27 hr |
| Feb 20, 2:49 AM EST | Wind Chill Advisory | APX | 7 hr |
| Feb 22, 2:31 AM EST | Wind Chill Advisory | APX | 33 hr |
| Mar 2, 3:46 PM EST | Winter Weather Advisory | APX | 27 hr |
| Mar 24, 3:56 PM EDT | Winter Weather Advisory | APX | 19 hr |
| Mar 25, 11:04 AM EDT | Winter Weather Advisory | APX | 116 min |
| Apr 21, 3:18 PM EDT | Special Weather Statement | APX | 27 min |
| May 3, 3:44 AM EDT | Red Flag Warning | APX | 17 hr |
| May 19, 3:03 AM EDT | Freeze Warning | APX | 29 hr |
| May 20, 1:52 PM EDT | Freeze Warning | APX | 15 hr |
| May 21, 2:45 PM EDT | Frost Advisory | APX | 16 hr |
| May 22, 2:50 PM EDT | Freeze Warning | APX | 13 hr |
| May 23, 4:53 AM EDT | Red Flag Warning | APX | 15 hr |
| May 26, 3:01 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 26, 4:41 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 26, 4:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 31, 3:25 AM EDT | Freeze Watch | APX | 11 hr |
| May 31, 3:48 AM EDT | Beach Hazards Statement | APX | 15 hr |
| May 31, 2:04 PM EDT | Freeze Warning | APX | 16 hr |
| Jun 1, 3:38 AM EDT | Frost Advisory | APX | 26 hr |
| Jun 8, 2:06 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jun 10, 6:45 AM EDT | Severe Thunderstorm Warning | APX | 45 min |
| Jun 22, 11:17 PM EDT | Beach Hazards Statement | APX | 17 hr |
| Jul 20, 2:40 PM EDT | Special Weather Statement | APX | 20 min |
| Jul 20, 4:04 PM EDT | Special Weather Statement | APX | 56 min |
| Aug 2, 9:51 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 2, 1:19 PM EDT | Severe Thunderstorm Warning | APX | 56 min |
| Aug 2, 3:59 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 14, 4:00 PM EDT | Severe Thunderstorm Warning | APX | 30 min |
| Aug 17, 7:06 PM EDT | Special Weather Statement | APX | 84 min |
| Aug 17, 7:13 PM EDT | Severe Thunderstorm Warning | APX | 17 min |
| Aug 19, 2:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 19, 4:26 PM EDT | Special Weather Statement | APX | 34 min |
| Sep 2, 5:22 PM EDT | Flash Flood Warning | APX | 3 hr |
| Sep 30, 4:16 AM EDT | Beach Hazards Statement | APX | 20 hr |
| Oct 15, 2:34 PM EDT | Special Weather Statement | APX | 3 hr |
| Oct 15, 4:47 PM EDT | Special Weather Statement | APX | 88 min |
| Oct 15, 6:16 PM EDT | Special Weather Statement | APX | 104 min |
| Nov 6, 5:38 AM EST | Special Weather Statement | APX | 82 min |
| Nov 20, 3:29 AM EST | Winter Storm Watch | APX | 12 hr |
| Nov 20, 3:29 PM EST | Winter Weather Advisory | APX | 39 hr |
| Dec 14, 3:21 PM EST | Special Weather Statement | APX | 54 min |
| Dec 23, 4:08 AM EST | Wind Advisory | APX | 32 hr |
| Dec 27, 3:30 AM EST | Winter Storm Watch | APX | 24 hr |
| Dec 28, 3:56 AM EST | Winter Storm Warning | APX | 28 hr |
| Dec 28, 7:00 PM EST | Mesoscale Discussion | SPC | 5 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 |
| Mesoscale Discussion | 5 |
| Special Weather Statement | 10 |
| Flooding | |
| Flash Flood Warning | 1 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 2 |
| Lake Effect Snow Advisory | 1 |
| Winter Weather Advisory | 8 |
| Cold | |
| Freeze Warning | 4 |
| Wind Chill Warning | 2 |
| Freeze Watch | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 5 |
| Wind and dust | |
| Wind Advisory | 1 |
| Fire | |
| Red Flag Warning | 2 |
| Coast and beach | |
| Beach Hazards Statement | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20142016
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.