Alert archive / Michigan / Leelanau County
Weather alerts in Leelanau County, Michigan, 2020
86 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Leelanau County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 86
- Warnings
- 14
- Watches
- 9
- Advisories
- 48
- Busiest month
- January14 alerts
- Busiest day
- July 19, 20205 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Leelanau County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 2 | 1 | 50% | 1 | 100% | 35 min |
| Flash flood warnings | 2 | 1 | 50% | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Gaylord, MI: tornado warnings | 2 | 0 | 100% | 0 | ||
| NWS Gaylord, MI: severe thunderstorm warnings | 64 | 20 | 69% | 59 | 59% | 19 min |
| NWS Gaylord, MI: flash flood warnings | 15 | 4 | 73% | 6 | 83% | 37 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 4, 2:19 AM EST | Winter Weather Advisory | APX | 22 hr |
| Jan 5, 3:05 AM EST | Lakeshore Flood Advisory | APX | 43 hr |
| Jan 7, 9:43 AM EST | Snow Squall Warning | APX | 92 min |
| Jan 7, 12:59 PM EST | Lakeshore Flood Advisory | APX | 27 hr |
| Jan 8, 4:00 PM EST | Winter Weather Advisory | APX | 33 hr |
| Jan 9, 3:43 PM EST | Winter Storm Watch | APX | 45 hr |
| Jan 10, 3:06 PM EST | Winter Storm Warning | APX | 38 hr |
| Jan 10, 3:10 PM EST | Lakeshore Flood Advisory | APX | 36 hr |
| Jan 10, 10:48 PM EST | Winter Weather Advisory | APX | 11 hr |
| Jan 16, 4:14 PM EST | Winter Storm Watch | APX | 11 hr |
| Jan 17, 3:29 AM EST | Winter Weather Advisory | APX | 54 hr |
| Jan 17, 2:47 PM EST | Lakeshore Flood Advisory | APX | 22 hr |
| Jan 18, 12:49 PM EST | Lakeshore Flood Advisory | APX | 27 hr |
| Jan 21, 10:43 AM EST | Lakeshore Flood Advisory | APX | 30 hr |
| Feb 2, 2:07 AM EST | Lakeshore Flood Advisory | APX | 13 hr |
| Feb 9, 3:15 AM EST | Winter Weather Advisory | APX | 21 hr |
| Feb 12, 12:23 PM EST | Lakeshore Flood Advisory | APX | 27 hr |
| Feb 14, 10:14 AM EST | Lakeshore Flood Warning | APX | 32 hr |
| Feb 17, 3:43 AM EST | Winter Weather Advisory | APX | 35 hr |
| Feb 21, 3:41 AM EST | Lakeshore Flood Advisory | APX | 21 hr |
| Feb 27, 3:27 AM EST | Winter Weather Advisory | APX | 48 hr |
| Feb 27, 3:28 AM EST | Lakeshore Flood Advisory | APX | 44 hr |
| Mar 5, 4:48 PM EST | Lakeshore Flood Advisory | APX | 23 hr |
| Mar 12, 3:30 PM EDT | Lakeshore Flood Advisory | APX | 31 hr |
| Mar 19, 8:02 PM EDT | Lakeshore Flood Advisory | APX | 24 hr |
| Mar 29, 3:43 PM EDT | Lakeshore Flood Advisory | APX | 26 hr |
| Apr 7, 4:55 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 9, 4:09 AM EDT | Lakeshore Flood Advisory | APX | 24 hr |
| Apr 11, 3:43 PM EDT | Lakeshore Flood Watch | APX | 12 hr |
| Apr 11, 4:56 PM EDT | High Wind Watch | APX | 23 hr |
| Apr 12, 4:06 AM EDT | Lakeshore Flood Warning | APX | 49 hr |
| Apr 12, 3:38 PM EDT | Wind Advisory | APX | 32 hr |
| Apr 18, 3:19 AM EDT | Lakeshore Flood Advisory | APX | 19 hr |
| Apr 20, 10:34 AM EDT | Lakeshore Flood Advisory | APX | 33 hr |
| May 16, 2:45 PM EDT | Flood Watch | APX | 56 hr |
| May 28, 2:24 PM EDT | Special Weather Statement | APX | 3 hr |
| Jun 9, 4:10 AM EDT | Wind Advisory | APX | 32 hr |
| Jun 9, 4:28 PM EDT | Coastal Flood Advisory | APX | 6 min |
| Jun 9, 4:34 PM EDT | Lakeshore Flood Advisory | APX | 21 hr |
| Jun 9, 11:11 PM EDT | Beach Hazards Statement | APX | 40 hr |
| Jun 10, 7:02 PM EDT | Flash Flood Warning | APX | 90 min |
| Jun 23, 10:27 AM EDT | Beach Hazards Statement | APX | 10 hr |
| Jul 18, 3:34 AM EDT | Beach Hazards Statement | APX | 17 hr |
| Jul 19, 3:43 AM EDT | Beach Hazards Statement | APX | 16 hr |
| Jul 19, 4:22 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Jul 19, 4:52 AM EDT | Special Weather Statement | APX | 53 min |
| Jul 19, 6:07 AM EDT | Severe Thunderstorm Warning | APX | 53 min |
| Jul 19, 6:35 AM EDT | Flash Flood Warning | APX | 3 hr |
| Aug 10, 4:46 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Aug 20, 3:57 AM EDT | Beach Hazards Statement | APX | 16 hr |
| Aug 28, 4:00 PM EDT | Beach Hazards Statement | APX | 34 hr |
| Sep 2, 4:19 PM EDT | Beach Hazards Statement | APX | 52 hr |
| Sep 5, 3:32 PM EDT | Beach Hazards Statement | APX | 48 hr |
| Sep 5, 3:32 PM EDT | Lakeshore Flood Advisory | APX | 48 hr |
| Sep 14, 4:00 PM EDT | Beach Hazards Statement | APX | 33 hr |
| Sep 17, 3:17 AM EDT | Frost Advisory | APX | 29 hr |
| Sep 18, 9:37 AM EDT | Frost Advisory | APX | 23 hr |
| Sep 26, 8:29 AM EDT | Severe Thunderstorm Warning | APX | 46 min |
| Sep 26, 3:36 PM EDT | Beach Hazards Statement | APX | 24 hr |
| Sep 26, 4:07 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Oct 2, 10:52 AM EDT | Frost Advisory | APX | 21 hr |
| Oct 5, 2:54 AM EDT | Lakeshore Flood Advisory | APX | 26 hr |
| Oct 14, 2:20 PM EDT | Lakeshore Flood Advisory | APX | 26 hr |
| Oct 17, 10:41 AM EDT | Lakeshore Flood Advisory | APX | 17 hr |
| Oct 21, 3:14 AM EDT | Lakeshore Flood Advisory | APX | 14 hr |
| Oct 22, 10:37 PM EDT | Flood Watch | APX | 16 hr |
| Oct 22, 11:35 PM EDT | Areal Flood Warning | APX | 15 hr |
| Oct 23, 3:27 AM EDT | Lakeshore Flood Advisory | APX | 20 hr |
| Oct 27, 4:15 PM EDT | Lakeshore Flood Advisory | APX | 19 hr |
| Oct 30, 3:38 PM EDT | Lakeshore Flood Warning | APX | 56 hr |
| Oct 31, 4:18 AM EDT | Wind Advisory | APX | 40 hr |
| Nov 10, 3:08 AM EST | Lakeshore Flood Advisory | APX | 31 hr |
| Nov 10, 2:07 PM EST | Wind Advisory | APX | 20 hr |
| Nov 14, 4:40 AM EST | Lakeshore Flood Watch | APX | 10 hr |
| Nov 14, 4:42 AM EST | Wind Advisory | APX | 23 hr |
| Nov 14, 2:37 PM EST | Lakeshore Flood Warning | APX | 45 hr |
| Nov 15, 4:09 AM EST | Lakeshore Flood Warning | APX | 32 hr |
| Nov 15, 4:11 AM EST | High Wind Warning | APX | 21 hr |
| Nov 15, 9:39 PM EST | Wind Advisory | APX | 9 hr |
| Nov 17, 3:58 PM EST | Lakeshore Flood Advisory | APX | 48 hr |
| Nov 24, 4:03 AM EST | Winter Weather Advisory | APX | 24 hr |
| Nov 30, 3:57 AM EST | Lakeshore Flood Advisory | APX | 55 hr |
| Dec 10, 4:05 PM EST | Winter Storm Watch | APX | 23 hr |
| Dec 11, 2:43 PM EST | Winter Storm Warning | APX | 30 hr |
| Dec 23, 3:57 PM EST | Winter Weather Advisory | APX | 43 hr |
| Dec 29, 3:04 AM EST | Winter Weather Advisory | APX | 33 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 archive20192021
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.