Alert archive / Michigan / Alger County
Weather alerts in Alger County, Michigan, 2009
69 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Alger County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 69
- Warnings
- 19
- Watches
- 7
- Advisories
- 30
- Busiest month
- January15 alerts
- Busiest day
- September 27, 20094 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Alger County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 4 | 0 | 100% | 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 3, 4:24 AM EST | Winter Weather Advisory | MQT | 29 hr |
| Jan 4, 10:31 AM EST | Winter Weather Advisory | MQT | 25 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 11, 4:40 PM EST | Winter Storm Watch | MQT | 12 hr |
| Jan 12, 4:47 AM EST | Winter Weather Advisory | MQT | 35 hr |
| Jan 13, 10:36 PM EST | Wind Chill Advisory | MQT | 59 hr |
| Jan 15, 4:54 AM EST | Lake Effect Snow Advisory | MQT | 35 hr |
| Jan 18, 12:29 AM EST | Lake Effect Snow Warning | MQT | 37 hr |
| Jan 18, 4:14 AM EST | Lake Effect Snow Advisory | MQT | 15 hr |
| Jan 19, 7:29 PM EST | Lake Effect Snow Advisory | MQT | 14 hr |
| Jan 22, 5:45 AM EST | Winter Weather Advisory | MQT | 3 days |
| Jan 29, 3:38 PM EST | Lake Effect Snow Advisory | MQT | 27 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 2, 11:45 AM EST | Lake Effect Snow Warning | MQT | 53 hr |
| Feb 16, 4:28 PM EST | Winter Storm Watch | MQT | 12 hr |
| Feb 17, 4:55 AM EST | Winter Storm Warning | MQT | 3 days |
| Feb 18, 10:39 PM EST | Blizzard Warning | MQT | 26 hr |
| Feb 21, 10:29 AM EST | Lake Effect Snow Warning | MQT | 51 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 |
| Feb 26, 7:31 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 26, 10:30 PM EST | Blizzard Warning | MQT | 14 hr |
| Feb 28, 4:13 AM EST | Lake Effect Snow Advisory | MQT | 34 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 24, 4:38 AM EDT | Wind Advisory | MQT | 27 hr |
| Mar 28, 4:29 PM EDT | Winter Weather Advisory | MQT | 26 hr |
| Apr 19, 4:00 AM EDT | Winter Storm Watch | MQT | 12 hr |
| May 7, 3:17 PM EDT | Severe Thunderstorm Warning | MQT | 43 min |
| May 16, 1:31 PM EDT | Wind Advisory | MQT | 6 hr |
| 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 30, 3:59 AM EDT | Freeze Watch | MQT | 12 hr |
| May 30, 3:59 AM EDT | Freeze Warning | MQT | 27 hr |
| Jun 2, 3:37 PM EDT | Frost Advisory | MQT | 15 hr |
| Jun 3, 4:11 PM EDT | Frost Advisory | MQT | 16 hr |
| Jun 29, 7:10 AM EDT | Coastal Flood Warning | MQT | 75 min |
| Jun 29, 8:25 AM EDT | Lakeshore Flood Statement | MQT | 3 days |
| Jul 7, 4:19 AM EDT | Lakeshore Flood Statement | MQT | 8 hr |
| Jul 11, 5:49 AM EDT | Lakeshore Flood Statement | MQT | 16 hr |
| Jul 15, 5:35 PM EDT | Severe Thunderstorm Warning | MQT | 55 min |
| Jul 17, 5:24 AM EDT | Lakeshore Flood Statement | MQT | 51 hr |
| Aug 1, 4:54 AM EDT | Lakeshore Flood Statement | MQT | 9 hr |
| Aug 9, 4:12 AM EDT | Severe Thunderstorm Warning | MQT | 63 min |
| Aug 9, 4:21 AM EDT | Severe Thunderstorm Warning | MQT | 54 min |
| Aug 18, 9:04 AM EDT | Lakeshore Flood Statement | MQT | 21 hr |
| Aug 21, 5:45 AM EDT | Lakeshore Flood Statement | MQT | 38 hr |
| Aug 29, 5:45 AM EDT | Lakeshore Flood Statement | MQT | 39 hr |
| Sep 15, 5:15 AM EDT | Lakeshore Flood Statement | MQT | 23 hr |
| Sep 17, 3:49 PM EDT | Lakeshore Flood Statement | MQT | 30 hr |
| Sep 18, 9:48 PM EDT | Frost Advisory | MQT | 10 hr |
| Sep 27, 4:12 AM EDT | High Wind Watch | MQT | 12 hr |
| Sep 27, 5:34 AM EDT | Lakeshore Flood Statement | MQT | 4 days |
| Sep 27, 3:54 PM EDT | High Wind Warning | MQT | 30 hr |
| Sep 27, 3:54 PM EDT | Wind Advisory | MQT | 36 hr |
| Dec 2, 4:15 PM EST | Lake Effect Snow Advisory | MQT | 42 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 13, 3:52 PM EST | Winter Weather Advisory | MQT | 28 hr |
| Dec 14, 4:28 PM EST | Lake Effect Snow Advisory | MQT | 42 hr |
| Dec 27, 3:55 PM EST | Lake Effect Snow Advisory | MQT | 39 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 |
| Mesoscale Discussion | 1 |
| Winter | |
| Blizzard Warning | 2 |
| Lake Effect Snow Warning | 5 |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 5 |
| Lake Effect Snow Advisory | 12 |
| Winter Weather Advisory | 8 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 4 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 1 |
| Coast and beach | |
| Coastal Flood Warning | 1 |
| Lakeshore Flood Statement | 12 |
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.