Alert archive / Wisconsin / Douglas County
Weather alerts in Douglas County, Wisconsin, 2020
139 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Douglas County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 139
- Warnings
- 33
- Watches
- 12
- Advisories
- 36
- Busiest month
- July39 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 Douglas County in 2020 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 7 minutes after it went out.
Douglas County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 1 | 67% | 1 | 100% | 7 min |
| Severe thunderstorm warnings | 15 | 13 | 13% | 17 | 59% | 10 min |
| Flash flood warnings | 2 | 2 | 0% | 1 | 0% |
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 11, 7:15 PM CST | Winter Storm Warning | DLH | 18 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 22, 9:14 PM CST | Dense Fog Advisory | DLH | 10 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, 5:01 AM CST | Special Weather Statement | DLH | 44 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 Warning | DLH | 27 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, 7:30 AM CDT | Snow Squall Warning | DLH | 60 min |
| Apr 9, 8:31 AM CDT | Snow Squall Warning | DLH | 44 min |
| Apr 9, 9:18 AM CDT | Special Weather Statement | DLH | 57 min |
| Apr 11, 3:04 PM CDT | Winter Weather Advisory | DLH | 32 hr |
| Apr 13, 4:31 PM CDT | Special Weather Statement | DLH | 29 min |
| Apr 13, 5:06 PM CDT | Special Weather Statement | DLH | 54 min |
| Apr 20, 4:42 PM CDT | Special Weather Statement | DLH | 48 min |
| Apr 20, 6:05 PM CDT | Special Weather Statement | DLH | 40 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 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, 5:33 PM CDT | Special Weather Statement | DLH | 27 min |
| May 26, 6:30 PM CDT | Special Weather Statement | DLH | 30 min |
| May 30, 4:34 PM CDT | Frost Advisory | DLH | 15 hr |
| Jun 7, 5:51 AM CDT | Special Weather Statement | DLH | 24 min |
| Jun 7, 6:06 AM CDT | Beach Hazards Statement | DLH | 15 hr |
| Jun 7, 6:14 AM CDT | Special Weather Statement | DLH | 31 min |
| Jun 12, 7:22 AM CDT | Frost Advisory | DLH | 23 hr |
| Jun 13, 3:18 AM CDT | Beach Hazards Statement | DLH | 18 hr |
| Jun 14, 3:30 AM CDT | Beach Hazards Statement | DLH | 18 hr |
| Jun 21, 3:04 AM CDT | Dense Fog Advisory | DLH | 6 hr |
| Jun 21, 2:01 PM CDT | Special Weather Statement | DLH | 29 min |
| Jun 21, 3:02 PM CDT | Severe Thunderstorm Warning | DLH | 28 min |
| Jun 21, 3:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 28, 2:04 PM CDT | Beach Hazards Statement | DLH | 7 hr |
| Jul 5, 1:20 PM CDT | Special Weather Statement | DLH | 10 min |
| Jul 5, 2:05 PM CDT | Special Weather Statement | DLH | 10 min |
| Jul 5, 3:18 PM CDT | Special Weather Statement | DLH | 12 min |
| Jul 5, 5:06 PM CDT | Severe Thunderstorm Warning | DLH | 39 min |
| Jul 5, 5:37 PM CDT | Severe Thunderstorm Warning | DLH | 24 min |
| Jul 5, 7:28 PM CDT | Severe Thunderstorm Warning | DLH | 19 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, 6:58 PM CDT | Severe Thunderstorm Warning | DLH | 47 min |
| Jul 8, 7:58 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 8, 8:03 PM CDT | Severe Thunderstorm Warning | DLH | 42 min |
| Jul 8, 9:15 PM CDT | Flash Flood Warning | DLH | 5 hr |
| Jul 8, 9:24 PM CDT | Special Weather Statement | DLH | 36 min |
| 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 9, 3:16 AM CDT | Severe Thunderstorm Warning | DLH | 29 min |
| Jul 9, 3:48 AM CDT | Special Weather Statement | DLH | 27 min |
| Jul 9, 4:13 AM CDT | Special Weather Statement | DLH | 32 min |
| Jul 13, 5:26 PM CDT | Beach Hazards Statement | DLH | 5 hr |
| 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, 12:41 AM CDT | Special Weather Statement | DLH | 49 min |
| Jul 18, 1:11 AM CDT | Tornado Warning | DLH | 34 min |
| Jul 18, 1:43 AM CDT | Tornado Warning | DLH | 32 min |
| Jul 18, 1:56 AM CDT | Tornado Warning | DLH | 19 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, 7:56 PM CDT | Severe Thunderstorm Warning | DLH | 49 min |
| Jul 18, 8:25 PM CDT | Special Weather Statement | DLH | 35 min |
| Jul 18, 8:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 18, 8:45 PM CDT | Severe Thunderstorm Warning | DLH | 45 min |
| Jul 18, 9:27 PM CDT | Special Weather Statement | DLH | 48 min |
| Jul 21, 3:50 AM CDT | Beach Hazards Statement | DLH | 17 hr |
| Jul 21, 1:43 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 22, 11:38 AM CDT | Beach Hazards Statement | DLH | 5 hr |
| Aug 7, 3:52 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 8, 12:03 AM CDT | Special Weather Statement | DLH | 12 min |
| Aug 8, 12:24 AM CDT | Special Weather Statement | DLH | 36 min |
| Aug 8, 1:21 AM CDT | Flash Flood Warning | DLH | 3 hr |
| Aug 9, 8:47 AM CDT | Special Weather Statement | DLH | 28 min |
| Aug 9, 12:30 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 9, 1:47 PM CDT | Areal Flood Warning | DLH | 6 hr |
| Aug 14, 3:25 AM CDT | Special Weather Statement | DLH | 50 min |
| Aug 14, 4:12 AM CDT | Special Weather Statement | DLH | 48 min |
| Aug 14, 5:38 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 14, 7:10 PM CDT | Severe Thunderstorm Warning | DLH | 50 min |
| Aug 14, 7:28 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Aug 14, 7:41 PM CDT | Severe Thunderstorm Warning | DLH | 34 min |
| Aug 14, 7:55 PM CDT | Severe Thunderstorm Warning | DLH | 50 min |
| Aug 21, 2:29 AM CDT | Dense Fog Advisory | DLH | 7 hr |
| Aug 21, 11:35 AM CDT | Beach Hazards Statement | DLH | 9 hr |
| Aug 22, 1:31 PM CDT | Special Weather Statement | DLH | 14 min |
| Aug 22, 4:54 PM CDT | Mesoscale Discussion | SPC | 3 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, 3:21 AM CDT | Beach Hazards Statement | DLH | 18 hr |
| Aug 26, 6:19 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Sep 1, 10:30 PM CDT | Special Weather Statement | DLH | 30 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 | Freeze Warning | 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 16, 2:48 AM CDT | Freeze Warning | DLH | 29 hr |
| Sep 17, 11:33 AM CDT | Frost Advisory | DLH | 21 hr |
| Sep 21, 2:52 PM CDT | Special Weather Statement | DLH | 23 min |
| Sep 21, 3:22 PM CDT | Special Weather Statement | DLH | 23 min |
| Sep 23, 8:38 PM CDT | Special Weather Statement | DLH | 22 min |
| Sep 23, 9:27 PM CDT | Special Weather Statement | DLH | 18 min |
| Sep 24, 4:29 AM CDT | Beach Hazards Statement | DLH | 15 hr |
| Sep 25, 12:58 AM CDT | Dense Fog Advisory | DLH | 12 hr |
| Sep 26, 12:52 AM CDT | Dense Fog Advisory | DLH | 11 hr |
| Oct 12, 1:00 AM CDT | Special Weather Statement | DLH | 15 min |
| Oct 19, 2:53 PM CDT | Winter Weather Advisory | DLH | 38 hr |
| Oct 21, 4:29 AM CDT | Winter Storm Watch | DLH | 11 hr |
| Oct 21, 3:37 PM CDT | Winter Storm Warning | DLH | 30 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 14, 11:18 PM CST | Winter Weather Advisory | DLH | 7 hr |
| Nov 15, 9:10 AM CST | Winter Weather Advisory | DLH | 6 hr |
| Nov 24, 8:29 PM CST | Dense Fog Advisory | DLH | 9 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, 12:33 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Dec 23, 5:15 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Dec 24, 3:14 PM CST | Wind Chill Advisory | DLH | 15 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 | 15 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 5 |
| Mesoscale Discussion | 16 |
| Special Weather Statement | 32 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 2 |
| Flash Flood Watch | 1 |
| Winter | |
| Snow Squall Warning | 2 |
| Winter Storm Warning | 6 |
| Winter Storm Watch | 5 |
| Winter Weather Advisory | 13 |
| Cold | |
| Freeze Warning | 3 |
| Frost Advisory | 5 |
| Wind Chill Advisory | 4 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 11 |
| Coast and beach | |
| Lakeshore Flood Warning | 1 |
| Lakeshore Flood Watch | 1 |
| Beach Hazards Statement | 10 |
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.