Alert archive / Minnesota / Koochiching County

Weather alerts in Koochiching County, Minnesota, 2026

97 weather alerts in 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Koochiching County and its neighbors

Each county as a circle sized by its count in 2026. Tap one for its archive.

Alerts
97
Warnings
35
Watches
19
Advisories
27
Busiest month
July33 alerts
Busiest day
June 10, 20265 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

0 of 1 tornado warnings covering Koochiching County in 2026 had a tornado report inside them.

Koochiching County, 2026

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings17665%333%45 min
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 5, 2:22 PM CSTDense Fog AdvisoryDLH22 hr
Jan 12, 1:50 PM CSTWinter Weather AdvisoryDLH40 hr
Jan 15, 3:47 PM CSTSnow Squall WarningDLH58 min
Jan 15, 4:51 PM CSTSnow Squall WarningDLH54 min
Jan 17, 1:10 PM CSTCold Weather AdvisoryDLH71 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 25, 1:23 PM CSTExtreme Cold WarningDLH23 hr
Jan 29, 12:50 PM CSTCold Weather AdvisoryDLH22 hr
Feb 13, 5:15 AM CSTDense Fog AdvisoryDLH4 hr
Feb 15, 2:32 PM CSTWinter Storm WatchDLH35 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 26, 11:02 AM CSTWind AdvisoryDLH37 hr
Mar 6, 11:31 AM CSTWinter Weather AdvisoryDLH18 hr
Mar 11, 12:54 PM CDTWinter Storm WarningDLH54 hr
Mar 12, 4:50 PM CDTMesoscale DiscussionSPC4 hr
Mar 30, 11:09 AM CDTWinter Weather AdvisoryDLH24 hr
Mar 31, 2:24 PM CDTWinter Storm WatchDLH11 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 8, 9:58 AM CDTSnow Squall WarningDLH62 min
Apr 8, 10:56 AM CDTSnow Squall WarningDLH64 min
Apr 14, 6:02 PM CDTDense Fog AdvisoryDLH12 hr
Apr 19, 2:10 PM CDTFire Weather WatchDLH13 hr
Apr 20, 3:15 AM CDTRed Flag WarningDLH17 hr
May 12, 6:06 PM CDTFrost AdvisoryDLH14 hr
May 13, 9:51 AM CDTFire Weather WatchDLH26 hr
May 14, 10:10 AM CDTRed Flag WarningDLH7 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 25, 3:19 PM CDTMesoscale DiscussionSPC116 min
Jun 5, 11:37 AM CDTFire Weather WatchDLH38 hr
Jun 9, 1:15 AM CDTHeat AdvisoryDLH19 hr
Jun 10, 2:39 AM CDTSevere Thunderstorm WatchSPC3 hr
Jun 10, 12:35 PM CDTMesoscale DiscussionSPC115 min
Jun 10, 12:50 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 10, 2:57 PM CDTMesoscale DiscussionSPC2 hr
Jun 10, 4:50 PM CDTSevere Thunderstorm WarningDLH55 min
Jun 25, 4:02 AM CDTDense Fog AdvisoryDLH4 hr
Jun 29, 10:13 AM CDTSevere Thunderstorm WatchSPC8 hr
Jun 29, 12:49 PM CDTSevere Thunderstorm WarningDLH56 min
Jun 29, 1:30 PM CDTSevere Thunderstorm WarningDLH60 min
Jun 29, 1:37 PM CDTSevere Thunderstorm WarningDLH83 min
Jun 29, 5:25 PM CDTSevere Thunderstorm WarningDLH40 min
Jun 29, 11:44 PM CDTSevere Thunderstorm WarningDLH76 min
Jul 1, 7:09 PM CDTMesoscale DiscussionSPC96 min
Jul 6, 1:40 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 6, 5:41 PM CDTSevere Thunderstorm WarningDLH42 min
Jul 6, 6:02 PM CDTMesoscale DiscussionSPC58 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, 4:11 AM CDTSevere Thunderstorm WarningDLH64 min
Jul 19, 1:12 AM CDTHeat AdvisoryDLH19 hr
Jul 24, 2:07 PM CDTHeat AdvisoryDLH31 hr
Jul 24, 2:36 PM CDTMesoscale DiscussionSPC84 min
Jul 24, 3:34 PM CDTTornado WatchSPC9 hr
Jul 24, 5:47 PM CDTSevere Thunderstorm Warning Destructive damage threatDLH58 min
Jul 24, 6:31 PM CDTTornado WarningDLH44 min
Jul 24, 7:08 PM CDTSevere Thunderstorm Warning Considerable damage threatDLH52 min
Jul 24, 7:35 PM CDTMesoscale DiscussionSPC85 min
Jul 24, 8:10 PM CDTSevere Thunderstorm WarningDLH65 min
Jul 24, 9:14 PM CDTAreal Flood AdvisoryDLH6 hr
Jul 25, 11:52 AM CDTHeat AdvisoryDLH33 hr
Jul 26, 11:54 PM CDTMesoscale DiscussionSPC96 min
Jul 27, 12:45 AM CDTSevere Thunderstorm WarningDLH60 min
Jul 27, 1:30 AM CDTSevere Thunderstorm WatchSPC8 hr
Jul 28, 2:31 PM CDTHeat AdvisoryDLH28 hr
Jul 30, 1:37 PM CDTMesoscale DiscussionSPC113 min
Jul 30, 4:32 PM CDTSevere Thunderstorm WarningDLH58 min
Jul 30, 5:14 PM CDTSevere Thunderstorm WarningDLH31 min
Jul 30, 5:51 PM CDTSevere Thunderstorm WarningDLH33 min
Aug 3, 5:15 PM CDTMesoscale DiscussionSPC2 hr
Aug 3, 5:54 PM CDTSevere Thunderstorm WatchSPC7 hr
Aug 3, 8:55 PM CDTSevere Thunderstorm WarningDLH50 min
Aug 3, 9:04 PM CDTMesoscale DiscussionSPC116 min
Aug 6, 6:40 PM CDTSevere Thunderstorm WarningDLH37 min
Aug 25, 1:21 PM CDTMesoscale DiscussionSPC114 min
Sep 3, 11:46 AM CDTMesoscale DiscussionSPC2 hr
Sep 3, 3:17 PM CDTMesoscale DiscussionSPC88 min
Sep 3, 3:46 PM CDTSevere Thunderstorm WatchSPC9 hr
Sep 13, 3:26 AM CDTFrost AdvisoryDLH29 hr
Sep 15, 2:06 PM CDTFrost AdvisoryDLH18 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.