Alert archive / Wisconsin / Bayfield County
Weather alerts in Bayfield County, Wisconsin, 2020
114 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Bayfield County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 114
- Warnings
- 29
- Watches
- 11
- Advisories
- 33
- Busiest month
- July35 alerts
- Busiest day
- July 9, 202010 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 3 tornado warnings covering Bayfield County in 2020 had a tornado report inside them.
Bayfield County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 1 | 67% | 0 | ||
| Severe thunderstorm warnings | 17 | 12 | 29% | 22 | 68% | 17 min |
| Flash flood warnings | 2 | 1 | 50% | 1 | 100% | 115 min |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Duluth, MN: tornado warnings | 18 | 4 | 78% | 11 | 55% | 10 min |
| NWS Duluth, MN: severe thunderstorm warnings | 126 | 64 | 49% | 232 | 64% | 19 min |
| NWS Duluth, MN: flash flood warnings | 9 | 5 | 44% | 15 | 60% | 69 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, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 8, 3:18 PM CST | Winter Weather Advisory | DLH | 27 hr |
| Jan 14, 10:05 AM CST | Winter Weather Advisory | DLH | 32 hr |
| Jan 15, 2:56 PM CST | Wind Chill Advisory | DLH | 19 hr |
| Jan 15, 2:56 PM CST | Winter Storm Watch | DLH | 24 hr |
| Jan 16, 2:44 PM CST | Winter Storm Warning | DLH | 66 hr |
| Jan 23, 2:28 AM CST | Winter Weather Advisory | DLH | 28 hr |
| Feb 1, 7:41 PM CST | Wind Advisory | DLH | 19 hr |
| Feb 11, 3:33 PM CST | Winter Weather Advisory | DLH | 41 hr |
| Feb 12, 4:27 AM CST | Wind Chill Advisory | DLH | 32 hr |
| Feb 13, 2:39 PM CST | Wind Chill Advisory | DLH | 19 hr |
| Feb 26, 5:48 AM CST | Special Weather Statement | DLH | 42 min |
| Mar 27, 3:48 AM CDT | Winter Storm Watch | DLH | 24 hr |
| Mar 27, 3:44 PM CDT | Lakeshore Flood Watch | DLH | 12 hr |
| Mar 28, 4:02 AM CDT | Winter Weather Advisory | DLH | 31 hr |
| Mar 28, 4:11 AM CDT | Lakeshore Flood Advisory | DLH | 32 hr |
| Mar 28, 3:10 PM CDT | Winter Storm Warning | DLH | 23 hr |
| Apr 2, 3:46 AM CDT | Winter Weather Advisory | DLH | 44 hr |
| Apr 9, 7:13 AM CDT | Special Weather Statement | DLH | 62 min |
| Apr 10, 3:18 PM CDT | Winter Storm Watch | DLH | 24 hr |
| Apr 11, 3:04 PM CDT | Winter Storm Warning | DLH | 46 hr |
| Apr 20, 4:42 PM CDT | Special Weather Statement | DLH | 48 min |
| Apr 28, 3:29 AM CDT | Dense Fog Advisory | DLH | 7 hr |
| Apr 28, 10:01 AM CDT | Dense Fog Advisory | DLH | 119 min |
| May 25, 1:26 PM CDT | Special Weather Statement | DLH | 49 min |
| May 26, 3:09 AM CDT | Dense Fog Advisory | DLH | 9 hr |
| May 26, 3:49 PM CDT | Flash Flood Watch | DLH | 10 hr |
| May 26, 8:28 PM CDT | Special Weather Statement | DLH | 32 min |
| May 30, 4:34 PM CDT | Frost Advisory | DLH | 15 hr |
| Jun 12, 7:22 AM CDT | Frost Advisory | DLH | 23 hr |
| Jun 15, 7:05 AM CDT | Special Weather Statement | DLH | 25 min |
| Jun 15, 7:42 AM CDT | Special Weather Statement | DLH | 33 min |
| Jun 21, 3:04 AM CDT | Dense Fog Advisory | DLH | 6 hr |
| Jun 21, 2:31 PM CDT | Special Weather Statement | DLH | 29 min |
| Jun 21, 2:34 PM CDT | Special Weather Statement | DLH | 26 min |
| Jun 21, 2:54 PM CDT | Severe Thunderstorm Warning | DLH | 36 min |
| Jun 21, 3:02 PM CDT | Severe Thunderstorm Warning | DLH | 28 min |
| Jun 21, 3:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jul 5, 1:31 PM CDT | Special Weather Statement | DLH | 14 min |
| Jul 5, 1:57 PM CDT | Severe Thunderstorm Warning | DLH | 33 min |
| Jul 5, 4:35 PM CDT | Severe Thunderstorm Warning | DLH | 40 min |
| Jul 5, 5:02 PM CDT | Flash Flood Warning | DLH | 113 min |
| Jul 5, 5:06 PM CDT | Severe Thunderstorm Warning | DLH | 39 min |
| Jul 5, 5:40 PM CDT | Severe Thunderstorm Warning | DLH | 25 min |
| Jul 8, 4:15 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 8, 6:17 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jul 8, 6:53 PM CDT | Severe Thunderstorm Warning | DLH | 52 min |
| Jul 8, 7:59 PM CDT | Severe Thunderstorm Warning | DLH | 46 min |
| Jul 8, 8:03 PM CDT | Severe Thunderstorm Warning | DLH | 42 min |
| Jul 8, 8:06 PM CDT | Tornado Warning | DLH | 24 min |
| Jul 8, 9:15 PM CDT | Flash Flood Warning | DLH | 5 hr |
| Jul 8, 9:42 PM CDT | Severe Thunderstorm Warning | DLH | 33 min |
| Jul 8, 9:51 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 8, 10:06 PM CDT | Severe Thunderstorm Warning | DLH | 24 min |
| Jul 8, 10:27 PM CDT | Severe Thunderstorm Warning | DLH | 63 min |
| Jul 9, 4:13 AM CDT | Special Weather Statement | DLH | 32 min |
| Jul 9, 4:44 AM CDT | Special Weather Statement | DLH | 31 min |
| Jul 17, 9:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jul 17, 10:25 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 17, 11:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 18, 1:43 AM CDT | Tornado Warning | DLH | 32 min |
| Jul 18, 2:07 AM CDT | Tornado Warning | DLH | 23 min |
| Jul 18, 2:44 AM CDT | Special Weather Statement | DLH | 31 min |
| Jul 18, 3:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 18, 3:53 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 18, 6:15 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Jul 18, 8:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 18, 9:07 PM CDT | Severe Thunderstorm Warning | DLH | 23 min |
| Jul 18, 9:27 PM CDT | Special Weather Statement | DLH | 48 min |
| Jul 18, 9:29 PM CDT | Severe Thunderstorm Warning | DLH | 31 min |
| Jul 18, 9:57 PM CDT | Severe Thunderstorm Warning | DLH | 48 min |
| Jul 21, 1:43 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 27, 5:39 PM CDT | Special Weather Statement | DLH | 21 min |
| Aug 8, 12:56 AM CDT | Special Weather Statement | DLH | 34 min |
| Aug 8, 1:30 AM CDT | Special Weather Statement | DLH | 30 min |
| Aug 9, 12:30 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 9, 1:37 PM CDT | Special Weather Statement | DLH | 8 min |
| Aug 9, 1:47 PM CDT | Areal Flood Warning | DLH | 6 hr |
| Aug 9, 3:46 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Aug 14, 4:14 AM CDT | Special Weather Statement | DLH | 46 min |
| Aug 14, 4:58 AM CDT | Special Weather Statement | DLH | 32 min |
| Aug 14, 7:55 PM CDT | Severe Thunderstorm Warning | DLH | 50 min |
| Aug 14, 8:38 PM CDT | Special Weather Statement | DLH | 37 min |
| Aug 20, 7:56 AM CDT | Special Weather Statement | DLH | 49 min |
| Aug 20, 8:30 AM CDT | Special Weather Statement | DLH | 15 min |
| Aug 20, 8:43 AM CDT | Special Weather Statement | DLH | 32 min |
| Aug 21, 2:29 AM CDT | Dense Fog Advisory | DLH | 7 hr |
| Aug 23, 12:19 AM CDT | Dense Fog Advisory | DLH | 9 hr |
| Aug 23, 10:22 PM CDT | Dense Fog Advisory | DLH | 8 hr |
| Aug 25, 11:40 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 26, 6:19 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Sep 1, 11:08 PM CDT | Special Weather Statement | DLH | 52 min |
| Sep 3, 5:59 AM CDT | Wind Advisory | DLH | 7 hr |
| Sep 8, 9:09 AM CDT | Frost Advisory | DLH | 23 hr |
| Sep 9, 8:47 AM CDT | Frost Advisory | DLH | 23 hr |
| Sep 10, 11:15 AM CDT | Freeze Warning | DLH | 22 hr |
| Sep 16, 2:48 AM CDT | Frost Advisory | DLH | 29 hr |
| Sep 17, 11:33 AM CDT | Frost Advisory | DLH | 21 hr |
| Sep 21, 3:46 PM CDT | Special Weather Statement | DLH | 29 min |
| Sep 25, 12:58 AM CDT | Dense Fog Advisory | DLH | 12 hr |
| Sep 25, 5:31 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Sep 25, 6:53 PM CDT | Severe Thunderstorm Warning | DLH | 52 min |
| Sep 26, 12:52 AM CDT | Dense Fog Advisory | DLH | 11 hr |
| Sep 26, 5:50 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Oct 19, 2:53 PM CDT | Winter Weather Advisory | DLH | 38 hr |
| Oct 21, 3:37 PM CDT | Winter Weather Advisory | DLH | 30 hr |
| Oct 22, 4:09 AM CDT | Winter Weather Advisory | DLH | 23 hr |
| Oct 31, 3:04 PM CDT | Wind Advisory | DLH | 22 hr |
| Nov 9, 3:04 PM CST | Winter Storm Watch | DLH | 13 hr |
| Nov 10, 4:07 AM CST | Winter Storm Warning | DLH | 23 hr |
| Nov 15, 9:10 AM CST | Winter Weather Advisory | DLH | 6 hr |
| Dec 22, 5:25 AM CST | Winter Storm Watch | DLH | 22 hr |
| Dec 22, 3:22 PM CST | Winter Storm Warning | DLH | 57 hr |
| Dec 23, 5:15 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Dec 28, 3:01 PM CST | Winter Weather Advisory | DLH | 42 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 | 17 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 4 |
| Mesoscale Discussion | 15 |
| Special Weather Statement | 26 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 2 |
| Flash Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 5 |
| Winter Storm Watch | 5 |
| Winter Weather Advisory | 11 |
| Cold | |
| Freeze Warning | 1 |
| Frost Advisory | 6 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 9 |
| Coast and beach | |
| Lakeshore Flood Watch | 1 |
| Lakeshore Flood Advisory | 1 |
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.