Alert archive / Minnesota / Lake County
Weather alerts in Lake County, Minnesota, 2020
129 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Lake County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 129
- Warnings
- 24
- Watches
- 11
- Advisories
- 48
- Busiest month
- July29 alerts
- Busiest day
- July 6, 20206 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Lake County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 11 | 5 | 55% | 0 | ||
| Flash flood warnings | 1 | 0 | 100% | 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 4, 2:41 PM CST | Wind Advisory | DLH | 31 hr |
| Jan 7, 3:04 PM CST | Wind Chill Advisory | DLH | 19 hr |
| Jan 7, 3:04 PM CST | Winter Storm Watch | DLH | 24 hr |
| Jan 8, 3:18 PM CST | Winter Weather Advisory | DLH | 27 hr |
| Jan 10, 2:21 PM CST | Wind Chill Advisory | DLH | 19 hr |
| Jan 11, 9:03 AM CST | Wind Chill Advisory | DLH | 3 hr |
| Jan 11, 7:15 PM CST | Winter Storm Warning | DLH | 18 hr |
| Jan 13, 3:17 AM CST | Winter Weather Advisory | DLH | 30 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 16, 8:32 PM CST | Wind Chill Advisory | DLH | 9 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 12, 4:27 AM CST | Wind Chill Advisory | DLH | 32 hr |
| Feb 12, 3:35 PM CST | Wind Chill Warning | DLH | 20 hr |
| Feb 13, 2:39 PM CST | Wind Chill Advisory | DLH | 19 hr |
| Feb 18, 2:47 PM CST | Wind Chill Advisory | DLH | 19 hr |
| Feb 19, 2:32 PM CST | Wind Chill Advisory | DLH | 18 hr |
| Mar 4, 3:24 PM CST | Winter Weather Advisory | DLH | 36 hr |
| Mar 18, 3:33 PM CDT | Winter Weather Advisory | DLH | 24 hr |
| 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 20, 6:01 PM CDT | Special Weather Statement | DLH | 44 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 14, 9:30 PM CDT | Special Weather Statement | DLH | 30 min |
| May 14, 9:34 PM CDT | Special Weather Statement | DLH | 26 min |
| May 17, 5:31 PM CDT | Fire Weather Watch | DLH | 10 hr |
| May 26, 3:09 AM CDT | Dense Fog Advisory | DLH | 9 hr |
| May 30, 4:34 PM CDT | Frost Advisory | DLH | 15 hr |
| Jun 11, 7:32 PM CDT | Frost Advisory | DLH | 11 hr |
| Jun 12, 7:22 AM CDT | Frost Advisory | DLH | 23 hr |
| Jun 21, 12:51 PM CDT | Special Weather Statement | DLH | 9 min |
| Jun 21, 1:36 PM CDT | Special Weather Statement | DLH | 24 min |
| Jun 21, 3:43 PM CDT | Special Weather Statement | DLH | 32 min |
| Jun 21, 5:12 PM CDT | Special Weather Statement | DLH | 33 min |
| Jul 5, 12:15 PM CDT | Special Weather Statement | DLH | 15 min |
| Jul 5, 12:38 PM CDT | Severe Thunderstorm Warning | DLH | 37 min |
| Jul 5, 1:09 PM CDT | Severe Thunderstorm Warning | DLH | 51 min |
| Jul 5, 11:12 PM CDT | Special Weather Statement | DLH | 18 min |
| Jul 6, 3:45 PM CDT | Special Weather Statement | DLH | 30 min |
| Jul 6, 4:13 PM CDT | Special Weather Statement | DLH | 32 min |
| Jul 6, 4:45 PM CDT | Special Weather Statement | DLH | 30 min |
| Jul 6, 5:10 PM CDT | Areal Flood Warning | DLH | 3 hr |
| Jul 6, 5:30 PM CDT | Special Weather Statement | DLH | 15 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, 7:12 PM CDT | Severe Thunderstorm Warning | DLH | 25 min |
| Jul 8, 7:12 PM CDT | Severe Thunderstorm Warning | DLH | 49 min |
| Jul 13, 10:49 PM CDT | Severe Thunderstorm Warning | DLH | 41 min |
| Jul 13, 11:23 PM CDT | Severe Thunderstorm Warning | DLH | 52 min |
| Jul 13, 11:57 PM CDT | Severe Thunderstorm Warning | DLH | 33 min |
| Jul 16, 12:14 AM CDT | Special Weather Statement | DLH | 16 min |
| Jul 16, 2:15 PM CDT | Special Weather Statement | DLH | 15 min |
| Jul 16, 5:46 PM CDT | Special Weather Statement | DLH | 29 min |
| Jul 16, 5:53 PM CDT | Severe Thunderstorm Warning | DLH | 52 min |
| Jul 16, 7:15 PM CDT | Special Weather Statement | DLH | 30 min |
| Jul 17, 11:36 PM CDT | Mesoscale Discussion | SPC | 114 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, 7:55 PM CDT | Severe Thunderstorm Warning | DLH | 50 min |
| Jul 18, 8:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 27, 4:31 PM CDT | Special Weather Statement | DLH | 29 min |
| Jul 27, 5:38 PM CDT | Special Weather Statement | DLH | 37 min |
| Jul 27, 6:01 PM CDT | Special Weather Statement | DLH | 14 min |
| Aug 9, 2:24 PM CDT | Severe Thunderstorm Warning | DLH | 51 min |
| Aug 9, 2:46 PM CDT | Flash Flood Warning | DLH | 3 hr |
| Aug 14, 3:28 AM CDT | Special Weather Statement | DLH | 47 min |
| Aug 14, 4:14 AM CDT | Special Weather Statement | DLH | 46 min |
| Aug 14, 8:10 PM CDT | Severe Thunderstorm Warning | DLH | 20 min |
| Aug 14, 8:43 PM CDT | Special Weather Statement | DLH | 47 min |
| Aug 19, 8:04 PM CDT | Special Weather Statement | DLH | 26 min |
| Aug 19, 8:34 PM CDT | Special Weather Statement | DLH | 26 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, 8:48 AM CDT | Special Weather Statement | DLH | 12 min |
| Sep 1, 9:49 PM CDT | Special Weather Statement | DLH | 41 min |
| Sep 3, 12:21 AM CDT | Special Weather Statement | DLH | 24 min |
| Sep 3, 12:44 AM CDT | Special Weather Statement | DLH | 31 min |
| Sep 3, 1:13 AM CDT | Special Weather Statement | DLH | 32 min |
| Sep 3, 5:59 AM CDT | Wind Advisory | DLH | 7 hr |
| Sep 7, 2:59 AM CDT | Frost Advisory | DLH | 29 hr |
| Sep 7, 3:38 AM CDT | Freeze Watch | DLH | 30 hr |
| Sep 8, 9:09 AM CDT | Frost Advisory | DLH | 23 hr |
| Sep 8, 9:09 AM CDT | Freeze Warning | DLH | 23 hr |
| Sep 9, 8:47 AM CDT | Frost Advisory | DLH | 23 hr |
| Sep 9, 8:47 AM CDT | Freeze Warning | DLH | 23 hr |
| Sep 10, 11:15 AM CDT | Frost Advisory | DLH | 22 hr |
| Sep 13, 3:13 PM CDT | Frost Advisory | DLH | 18 hr |
| Sep 16, 2:48 AM CDT | Freeze Warning | DLH | 29 hr |
| Sep 17, 11:33 AM CDT | Frost Advisory | DLH | 21 hr |
| Sep 17, 11:33 AM CDT | Freeze Warning | DLH | 21 hr |
| Sep 25, 5:30 PM CDT | Special Weather Statement | DLH | 30 min |
| Sep 25, 5:52 PM CDT | Special Weather Statement | DLH | 23 min |
| Sep 26, 12:52 AM CDT | Dense Fog Advisory | DLH | 11 hr |
| Sep 29, 6:31 PM CDT | Special Weather Statement | DLH | 29 min |
| Sep 29, 6:43 PM CDT | Special Weather Statement | DLH | 32 min |
| Sep 29, 7:03 PM CDT | Special Weather Statement | DLH | 27 min |
| Sep 29, 7:19 PM CDT | Special Weather Statement | DLH | 26 min |
| Sep 29, 7:28 PM CDT | Special Weather Statement | DLH | 32 min |
| Sep 29, 7:57 PM CDT | Special Weather Statement | DLH | 33 min |
| Oct 16, 10:57 AM CDT | Winter Weather Advisory | DLH | 35 hr |
| 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 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 10, 4:07 AM CST | Winter Weather Advisory | DLH | 23 hr |
| Nov 10, 9:43 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Nov 24, 3:11 AM CST | Winter Weather Advisory | DLH | 15 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, 5:25 AM CST | Winter Weather Advisory | DLH | 10 hr |
| Dec 22, 3:22 PM CST | Winter Storm Warning | DLH | 57 hr |
| Dec 23, 9:58 AM CST | Blizzard Warning | DLH | 18 hr |
| Dec 23, 12:33 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Dec 23, 5:15 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Dec 23, 8:15 PM CST | Wind Chill Advisory | DLH | 19 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 | 11 |
| Severe Thunderstorm Watch | 2 |
| Mesoscale Discussion | 8 |
| Special Weather Statement | 38 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 1 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 5 |
| Winter Storm Watch | 6 |
| Winter Weather Advisory | 15 |
| Cold | |
| Freeze Warning | 4 |
| Wind Chill Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 9 |
| Wind Chill Advisory | 11 |
| Wind and dust | |
| Wind Advisory | 4 |
| Fire | |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 8 |
| 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.