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

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings10280%0
Flash flood warnings00

Each office's whole area, 2026

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Duluth, MN: tornado warnings140100%20%
NWS Duluth, MN: severe thunderstorm warnings1257044%19181%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.

IssuedProductOfficeLasted
Jan 4, 2:31 AM CSTWinter Weather AdvisoryDLH21 hr
Jan 5, 2:22 PM CSTDense Fog AdvisoryDLH22 hr
Jan 7, 6:16 PM CSTDense Fog AdvisoryDLH26 hr
Jan 12, 1:50 PM CSTWinter Weather AdvisoryDLH40 hr
Jan 13, 12:25 PM CSTWind AdvisoryDLH18 hr
Jan 15, 6:17 PM CSTSnow Squall WarningDLH58 min
Jan 17, 1:10 PM CSTCold Weather AdvisoryDLH71 hr
Jan 18, 1:42 AM CSTWind AdvisoryDLH28 hr
Jan 20, 12:43 PM CSTCold Weather AdvisoryDLH49 hr
Jan 20, 12:43 PM CSTExtreme Cold WatchDLH49 hr
Jan 20, 12:43 PM CSTExtreme Cold WarningDLH4 days
Jan 23, 2:40 PM CSTCold Weather AdvisoryDLH69 hr
Jan 29, 12:50 PM CSTCold Weather AdvisoryDLH22 hr
Feb 13, 12:45 PM CSTDense Fog AdvisoryDLH5 hr
Feb 15, 4:12 AM CSTDense Fog AdvisoryDLH18 hr
Feb 15, 2:32 PM CSTWinter Storm WatchDLH35 hr
Feb 16, 1:23 PM CSTBlizzard WarningDLH55 hr
Feb 16, 1:23 PM CSTWinter Storm WarningDLH55 hr
Feb 17, 1:45 AM CSTWinter Weather AdvisoryDLH58 hr
Feb 17, 10:08 PM CSTMesoscale DiscussionSPC4 hr
Feb 18, 4:16 AM CSTMesoscale DiscussionSPC4 hr
Feb 22, 1:20 PM CSTWinter Storm WatchDLH12 hr
Feb 23, 1:03 AM CSTWinter Storm WarningDLH32 hr
Feb 23, 1:03 AM CSTWinter Weather AdvisoryDLH35 hr
Feb 25, 7:41 AM CSTHigh Wind WatchDLH27 hr
Feb 26, 11:02 AM CSTHigh Wind WarningDLH37 hr
Feb 26, 11:02 AM CSTWind AdvisoryDLH37 hr
Mar 4, 4:59 PM CSTDense Fog AdvisoryDLH15 hr
Mar 4, 9:13 PM CSTWinter Weather AdvisoryDLH40 hr
Mar 5, 1:58 PM CSTDense Fog AdvisoryDLH31 hr
Mar 6, 11:31 AM CSTWinter Weather AdvisoryDLH18 hr
Mar 11, 12:54 PM CDTBlizzard WarningDLH45 hr
Mar 11, 12:54 PM CDTWinter Storm WarningDLH54 hr
Mar 13, 12:58 PM CDTWinter Weather AdvisoryDLH3 hr
Mar 14, 5:13 PM CDTWind AdvisoryDLH45 hr
Mar 15, 2:56 PM CDTHigh Wind WarningDLH23 hr
Mar 23, 7:58 PM CDTSnow Squall WarningDLH47 min
Mar 30, 11:09 AM CDTWinter Weather AdvisoryDLH24 hr
Mar 31, 2:24 PM CDTWinter Storm WatchDLH11 hr
Apr 1, 1:13 AM CDTWinter Storm WarningDLH54 hr
Apr 1, 1:13 AM CDTWinter Weather AdvisoryDLH54 hr
Apr 1, 1:59 PM CDTWinter Storm WatchDLH36 hr
Apr 3, 2:10 AM CDTWinter Storm WarningDLH45 hr
Apr 12, 12:00 PM CDTDense Fog AdvisoryDLH10 hr
Apr 14, 6:02 PM CDTDense Fog AdvisoryDLH12 hr
Apr 15, 1:03 PM CDTDense Fog AdvisoryDLH20 hr
Apr 17, 7:32 PM CDTWind AdvisoryDLH5 hr
Apr 20, 3:15 AM CDTRed Flag WarningDLH17 hr
Apr 24, 6:45 AM CDTAreal Flood AdvisoryDLH36 hr
Apr 26, 1:15 PM CDTFlood WatchDLH38 hr
Apr 27, 6:00 PM CDTAreal Flood AdvisoryDLH24 hr
Apr 28, 6:59 PM CDTAreal Flood AdvisoryDLH4 days
May 2, 5:42 PM CDTAreal Flood AdvisoryDLH24 days
May 12, 6:06 PM CDTFrost AdvisoryDLH14 hr
May 13, 11:31 AM CDTFrost AdvisoryDLH19 hr
May 14, 11:25 AM CDTRed Flag WarningDLH34 hr
May 16, 1:25 PM CDTFrost AdvisoryDLH19 hr
May 19, 2:09 PM CDTFreeze WarningDLH18 hr
May 20, 2:12 PM CDTFrost AdvisoryDLH18 hr
May 21, 2:14 AM CDTFreeze WarningDLH6 hr
May 21, 11:06 AM CDTFrost AdvisoryDLH20 hr
May 24, 12:44 AM CDTDense Fog AdvisoryDLH8 hr
Jun 8, 2:13 PM CDTDense Fog AdvisoryDLH20 hr
Jun 9, 1:37 PM CDTDense Fog AdvisoryDLH17 hr
Jun 10, 8:30 AM CDTDense Fog AdvisoryDLH5 hr
Jun 11, 12:59 AM CDTDense Fog AdvisoryDLH5 hr
Jun 13, 12:46 PM CDTRed Flag WarningDLH32 hr
Jun 25, 4:02 AM CDTDense Fog AdvisoryDLH4 hr
Jun 29, 9:45 AM CDTSevere Thunderstorm WarningDLH36 min
Jun 29, 10:13 AM CDTSevere Thunderstorm WatchSPC8 hr
Jun 29, 1:37 PM CDTSevere Thunderstorm WarningDLH83 min
Jun 29, 2:14 PM CDTMesoscale DiscussionSPC2 hr
Jun 30, 1:10 AM CDTSevere Thunderstorm WarningDLH65 min
Jul 10, 1:00 PM CDTHeat AdvisoryDLH32 hr
Jul 10, 1:00 PM CDTExtreme Heat WatchDLH25 hr
Jul 11, 1:33 PM CDTExtreme Heat WarningDLH4 days
Jul 11, 2:51 PM CDTFire Weather WatchDLH9 hr
Jul 11, 2:51 PM CDTFire Weather WatchDLH31 hr
Jul 12, 12:12 AM CDTRed Flag WarningDLH21 hr
Jul 12, 9:39 PM CDTFire Weather WatchDLH16 hr
Jul 12, 9:39 PM CDTRed Flag WarningDLH24 hr
Jul 13, 1:32 PM CDTRed Flag WarningDLH31 hr
Jul 17, 2:46 PM CDTMesoscale DiscussionSPC119 min
Jul 19, 1:12 AM CDTHeat AdvisoryDLH19 hr
Jul 19, 3:21 PM CDTFire Weather WatchDLH15 hr
Jul 20, 5:16 AM CDTSevere Thunderstorm WarningDLH59 min
Jul 20, 5:38 AM CDTSevere Thunderstorm WarningDLH37 min
Jul 25, 11:52 AM CDTHeat AdvisoryDLH33 hr
Jul 26, 11:54 PM CDTMesoscale DiscussionSPC96 min
Jul 27, 1:30 AM CDTSevere Thunderstorm WatchSPC8 hr
Jul 27, 5:05 AM CDTSevere Thunderstorm WarningDLH55 min
Jul 27, 5:21 AM CDTSevere Thunderstorm WarningDLH54 min
Jul 27, 5:26 AM CDTMesoscale DiscussionSPC2 hr
Jul 27, 5:51 AM CDTSevere Thunderstorm WarningDLH24 min
Jul 27, 6:11 AM CDTSevere Thunderstorm WarningDLH34 min
Jul 28, 3:58 AM CDTDense Fog AdvisoryDLH6 hr
Jul 28, 2:31 PM CDTHeat AdvisoryDLH28 hr
Jul 30, 11:24 AM CDTSevere Thunderstorm WarningDLH29 min
Aug 25, 3:33 PM CDTSevere Thunderstorm WatchSPC6 hr
Sep 13, 3:26 AM CDTFrost AdvisoryDLH29 hr
Sep 20, 4:46 PM CDTFrost AdvisoryDLH15 hr
Sep 21, 12:59 PM CDTFrost AdvisoryDLH19 hr
Sep 22, 1:04 PM CDTFrost AdvisoryDLH19 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.