Alert archive / Minnesota / Cook County
Weather alerts in Cook County, Minnesota, 2026
103 weather alerts in 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Cook County and its neighbors
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Alerts
- 103
- Warnings
- 31
- Watches
- 15
- Advisories
- 51
- Busiest month
- July25 alerts
- Busiest day
- July 27, 20267 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Cook County, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 10 | 2 | 80% | 0 | ||
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Duluth, MN: tornado warnings | 14 | 0 | 100% | 2 | 0% | |
| NWS Duluth, MN: severe thunderstorm warnings | 125 | 70 | 44% | 191 | 81% | 25 min |
An office's figures cover every county it serves, including across state lines.
The year is still running; reports filed late and damage surveys can still change these figures.
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, 2:31 AM CST | Winter Weather Advisory | DLH | 21 hr |
| Jan 5, 2:22 PM CST | Dense Fog Advisory | DLH | 22 hr |
| Jan 7, 6:16 PM CST | Dense Fog Advisory | DLH | 26 hr |
| Jan 12, 1:50 PM CST | Winter Weather Advisory | DLH | 40 hr |
| Jan 13, 12:25 PM CST | Wind Advisory | DLH | 18 hr |
| Jan 15, 6:17 PM CST | Snow Squall Warning | DLH | 58 min |
| Jan 17, 1:10 PM CST | Cold Weather Advisory | DLH | 71 hr |
| Jan 18, 1:42 AM CST | Wind Advisory | DLH | 28 hr |
| Jan 20, 12:43 PM CST | Cold Weather Advisory | DLH | 49 hr |
| Jan 20, 12:43 PM CST | Extreme Cold Watch | DLH | 49 hr |
| Jan 20, 12:43 PM CST | Extreme Cold Warning | DLH | 4 days |
| Jan 23, 2:40 PM CST | Cold Weather Advisory | DLH | 69 hr |
| Jan 29, 12:50 PM CST | Cold Weather Advisory | DLH | 22 hr |
| Feb 13, 12:45 PM CST | Dense Fog Advisory | DLH | 5 hr |
| Feb 15, 4:12 AM CST | Dense Fog Advisory | DLH | 18 hr |
| Feb 15, 2:32 PM CST | Winter Storm Watch | DLH | 35 hr |
| Feb 16, 1:23 PM CST | Blizzard Warning | DLH | 55 hr |
| Feb 16, 1:23 PM CST | Winter Storm Warning | DLH | 55 hr |
| Feb 17, 1:45 AM CST | Winter Weather Advisory | DLH | 58 hr |
| Feb 17, 10:08 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Feb 18, 4:16 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Feb 22, 1:20 PM CST | Winter Storm Watch | DLH | 12 hr |
| Feb 23, 1:03 AM CST | Winter Storm Warning | DLH | 32 hr |
| Feb 23, 1:03 AM CST | Winter Weather Advisory | DLH | 35 hr |
| Feb 25, 7:41 AM CST | High Wind Watch | DLH | 27 hr |
| Feb 26, 11:02 AM CST | High Wind Warning | DLH | 37 hr |
| Feb 26, 11:02 AM CST | Wind Advisory | DLH | 37 hr |
| Mar 4, 4:59 PM CST | Dense Fog Advisory | DLH | 15 hr |
| Mar 4, 9:13 PM CST | Winter Weather Advisory | DLH | 40 hr |
| Mar 5, 1:58 PM CST | Dense Fog Advisory | DLH | 31 hr |
| Mar 6, 11:31 AM CST | Winter Weather Advisory | DLH | 18 hr |
| Mar 11, 12:54 PM CDT | Blizzard Warning | DLH | 45 hr |
| Mar 11, 12:54 PM CDT | Winter Storm Warning | DLH | 54 hr |
| Mar 13, 12:58 PM CDT | Winter Weather Advisory | DLH | 3 hr |
| Mar 14, 5:13 PM CDT | Wind Advisory | DLH | 45 hr |
| Mar 15, 2:56 PM CDT | High Wind Warning | DLH | 23 hr |
| Mar 23, 7:58 PM CDT | Snow Squall Warning | DLH | 47 min |
| Mar 30, 11:09 AM CDT | Winter Weather Advisory | DLH | 24 hr |
| Mar 31, 2:24 PM CDT | Winter Storm Watch | DLH | 11 hr |
| Apr 1, 1:13 AM CDT | Winter Storm Warning | DLH | 54 hr |
| Apr 1, 1:13 AM CDT | Winter Weather Advisory | DLH | 54 hr |
| Apr 1, 1:59 PM CDT | Winter Storm Watch | DLH | 36 hr |
| Apr 3, 2:10 AM CDT | Winter Storm Warning | DLH | 45 hr |
| Apr 12, 12:00 PM CDT | Dense Fog Advisory | DLH | 10 hr |
| Apr 14, 6:02 PM CDT | Dense Fog Advisory | DLH | 12 hr |
| Apr 15, 1:03 PM CDT | Dense Fog Advisory | DLH | 20 hr |
| Apr 17, 7:32 PM CDT | Wind Advisory | DLH | 5 hr |
| Apr 20, 3:15 AM CDT | Red Flag Warning | DLH | 17 hr |
| Apr 24, 6:45 AM CDT | Areal Flood Advisory | DLH | 36 hr |
| Apr 26, 1:15 PM CDT | Flood Watch | DLH | 38 hr |
| Apr 27, 6:00 PM CDT | Areal Flood Advisory | DLH | 24 hr |
| Apr 28, 6:59 PM CDT | Areal Flood Advisory | DLH | 4 days |
| May 2, 5:42 PM CDT | Areal Flood Advisory | DLH | 24 days |
| May 12, 6:06 PM CDT | Frost Advisory | DLH | 14 hr |
| May 13, 11:31 AM CDT | Frost Advisory | DLH | 19 hr |
| May 14, 11:25 AM CDT | Red Flag Warning | DLH | 34 hr |
| May 16, 1:25 PM CDT | Frost Advisory | DLH | 19 hr |
| May 19, 2:09 PM CDT | Freeze Warning | DLH | 18 hr |
| May 20, 2:12 PM CDT | Frost Advisory | DLH | 18 hr |
| May 21, 2:14 AM CDT | Freeze Warning | DLH | 6 hr |
| May 21, 11:06 AM CDT | Frost Advisory | DLH | 20 hr |
| May 24, 12:44 AM CDT | Dense Fog Advisory | DLH | 8 hr |
| Jun 8, 2:13 PM CDT | Dense Fog Advisory | DLH | 20 hr |
| Jun 9, 1:37 PM CDT | Dense Fog Advisory | DLH | 17 hr |
| Jun 10, 8:30 AM CDT | Dense Fog Advisory | DLH | 5 hr |
| Jun 11, 12:59 AM CDT | Dense Fog Advisory | DLH | 5 hr |
| Jun 13, 12:46 PM CDT | Red Flag Warning | DLH | 32 hr |
| Jun 25, 4:02 AM CDT | Dense Fog Advisory | DLH | 4 hr |
| Jun 29, 9:45 AM CDT | Severe Thunderstorm Warning | DLH | 36 min |
| Jun 29, 10:13 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 29, 1:37 PM CDT | Severe Thunderstorm Warning | DLH | 83 min |
| Jun 29, 2:14 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 1:10 AM CDT | Severe Thunderstorm Warning | DLH | 65 min |
| Jul 10, 1:00 PM CDT | Heat Advisory | DLH | 32 hr |
| Jul 10, 1:00 PM CDT | Extreme Heat Watch | DLH | 25 hr |
| Jul 11, 1:33 PM CDT | Extreme Heat Warning | DLH | 4 days |
| Jul 11, 2:51 PM CDT | Fire Weather Watch | DLH | 9 hr |
| Jul 11, 2:51 PM CDT | Fire Weather Watch | DLH | 31 hr |
| Jul 12, 12:12 AM CDT | Red Flag Warning | DLH | 21 hr |
| Jul 12, 9:39 PM CDT | Fire Weather Watch | DLH | 16 hr |
| Jul 12, 9:39 PM CDT | Red Flag Warning | DLH | 24 hr |
| Jul 13, 1:32 PM CDT | Red Flag Warning | DLH | 31 hr |
| Jul 17, 2:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jul 19, 1:12 AM CDT | Heat Advisory | DLH | 19 hr |
| Jul 19, 3:21 PM CDT | Fire Weather Watch | DLH | 15 hr |
| Jul 20, 5:16 AM CDT | Severe Thunderstorm Warning | DLH | 59 min |
| Jul 20, 5:38 AM CDT | Severe Thunderstorm Warning | DLH | 37 min |
| Jul 25, 11:52 AM CDT | Heat Advisory | DLH | 33 hr |
| Jul 26, 11:54 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 27, 1:30 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 27, 5:05 AM CDT | Severe Thunderstorm Warning | DLH | 55 min |
| Jul 27, 5:21 AM CDT | Severe Thunderstorm Warning | DLH | 54 min |
| Jul 27, 5:26 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 27, 5:51 AM CDT | Severe Thunderstorm Warning | DLH | 24 min |
| Jul 27, 6:11 AM CDT | Severe Thunderstorm Warning | DLH | 34 min |
| Jul 28, 3:58 AM CDT | Dense Fog Advisory | DLH | 6 hr |
| Jul 28, 2:31 PM CDT | Heat Advisory | DLH | 28 hr |
| Jul 30, 11:24 AM CDT | Severe Thunderstorm Warning | DLH | 29 min |
| Aug 25, 3:33 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 13, 3:26 AM CDT | Frost Advisory | DLH | 29 hr |
| Sep 20, 4:46 PM CDT | Frost Advisory | DLH | 15 hr |
| Sep 21, 12:59 PM CDT | Frost Advisory | DLH | 19 hr |
| Sep 22, 1:04 PM CDT | Frost Advisory | DLH | 19 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 archive2025
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.