Alert archive / Michigan / Schoolcraft County
Weather alerts in Schoolcraft County, Michigan, 2009
48 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Schoolcraft County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 48
- Warnings
- 11
- Watches
- 4
- Advisories
- 28
- Busiest month
- January14 alerts
- Busiest day
- January 1, 20092 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Schoolcraft 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, 4:35 AM EST | Winter Weather Advisory | MQT | 20 hr |
| 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, 1:08 AM EST | Mesoscale Discussion | SPC | 4 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, 10:36 PM EST | Wind Chill Advisory | MQT | 59 hr |
| Jan 15, 4:54 AM EST | Lake Effect Snow Advisory | MQT | 35 hr |
| Jan 16, 4:21 PM EST | Winter Weather Advisory | MQT | 27 hr |
| Jan 17, 6:35 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 17, 4:38 PM EST | Winter Storm Warning | MQT | 4 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 17, 4:55 AM EST | Winter Storm Watch | MQT | 12 hr |
| Feb 17, 4:55 AM EST | Winter Storm Warning | MQT | 3 days |
| Feb 21, 4:12 AM EST | Lake Effect Snow Advisory | MQT | 51 hr |
| Feb 24, 4:27 PM EST | Winter Storm Watch | MQT | 36 hr |
| Feb 25, 4:35 AM EST | Winter Weather Advisory | MQT | 12 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 |
| Mar 8, 1:58 PM EDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 10, 4:35 AM EDT | Winter Weather Advisory | MQT | 36 hr |
| Mar 10, 4:14 PM EDT | Wind Advisory | MQT | 20 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 |
| May 7, 3:17 PM EDT | Severe Thunderstorm Warning | MQT | 43 min |
| May 19, 3:11 PM EDT | Red Flag Warning | MQT | 31 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 5, 4:19 PM EDT | Frost Advisory | MQT | 15 hr |
| Jul 15, 5:35 PM EDT | Severe Thunderstorm Warning | MQT | 55 min |
| Aug 9, 4:21 AM EDT | Severe Thunderstorm Warning | MQT | 54 min |
| Aug 10, 4:39 PM EDT | Severe Thunderstorm Warning | MQT | 66 min |
| Sep 18, 9:48 PM EDT | Frost Advisory | MQT | 10 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, 4:18 PM EST | Winter Storm Warning | MQT | 60 hr |
| Dec 9, 7:28 AM EST | Mesoscale Discussion | SPC | 4 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 26, 9:45 PM EST | Lake Effect Snow Advisory | MQT | 7 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 | 5 |
| Winter | |
| Lake Effect Snow Warning | 1 |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 3 |
| Lake Effect Snow Advisory | 8 |
| Winter Weather Advisory | 11 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 5 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fire | |
| Red Flag Warning | 1 |
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.