Weather alerts in Cass County, Minnesota, 2025

129 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Cass County and its neighbors

Each county as a circle sized by its count in 2025. Tap one for its archive.

Alerts: 129
Warnings: 39
Watches: 23
Advisories: 47
Busiest month: June27 alerts
Busiest day: June 21, 202510 alerts

Over time

By month

Warning verification

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

2 of 4 tornado warnings covering Cass County in 2025 had a tornado report inside them; 4 of 4 tornado reports fell inside a warning, on average 9 minutes after it went out.

Cass County, 2025

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	4	2	50%	4	100%	9 min
Severe thunderstorm warnings	19	14	26%	19	74%	28 min
Flash flood warnings	1	0	100%	0

Each office's whole area, 2025

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Duluth, MN: tornado warnings	25	4	84%	6	83%	17 min
NWS Duluth, MN: severe thunderstorm warnings	108	58	46%	226	74%	31 min
NWS Duluth, MN: flash flood warnings	14	8	43%	26	81%	78 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 10, 2:03 PM CST	Winter Weather Advisory	DLH	67 hr
Jan 12, 1:36 PM CST	Cold Weather Advisory	DLH	21 hr
Jan 17, 1:06 PM CST	Cold Weather Advisory	DLH	29 hr
Jan 17, 1:06 PM CST	Extreme Cold Warning	DLH	4 days
Feb 1, 2:08 PM CST	Mesoscale Discussion	SPC	4 hr
Feb 4, 3:10 PM CST	Winter Weather Advisory	DLH	39 hr
Feb 7, 3:10 AM CST	Winter Weather Advisory	DLH	36 hr
Feb 9, 1:32 PM CST	Cold Weather Advisory	DLH	45 hr
Feb 11, 2:02 PM CST	Cold Weather Advisory	DLH	20 hr
Feb 12, 1:43 PM CST	Cold Weather Advisory	DLH	20 hr
Feb 15, 2:29 AM CST	Extreme Cold Watch	DLH	24 hr
Feb 16, 2:22 AM CST	Extreme Cold Watch	DLH	24 hr
Feb 16, 2:22 AM CST	Extreme Cold Warning	DLH	34 hr
Feb 17, 2:12 AM CST	Extreme Cold Warning	DLH	32 hr
Feb 18, 2:10 AM CST	Extreme Cold Warning	DLH	31 hr
Feb 28, 7:41 AM CST	Wind Advisory	DLH	6 hr
Mar 14, 2:18 PM CDT	Winter Storm Warning	DLH	27 hr
Mar 15, 7:47 AM CDT	Mesoscale Discussion	SPC	4 hr
Mar 22, 3:12 AM CDT	Winter Weather Advisory	DLH	58 hr
Mar 30, 7:33 PM CDT	Winter Storm Watch	DLH	31 hr
Apr 1, 2:47 AM CDT	Winter Storm Warning	DLH	51 hr
May 8, 2:27 PM CDT	Fire Weather Watch	DLH	48 hr
May 10, 2:24 PM CDT	Fire Weather Watch	DLH	24 hr
May 10, 2:24 PM CDT	Red Flag Warning	DLH	32 hr
May 11, 2:18 PM CDT	Red Flag Warning	DLH	31 hr
May 12, 1:59 PM CDT	Fire Weather Watch	DLH	13 hr
May 13, 3:25 AM CDT	Red Flag Warning	DLH	18 hr
May 15, 12:46 PM CDT	Tornado Watch	SPC	7 hr
May 17, 3:38 AM CDT	Frost Advisory	DLH	28 hr
May 18, 2:39 PM CDT	Freeze Warning	DLH	17 hr
May 21, 3:11 AM CDT	Frost Advisory	DLH	29 hr
May 22, 3:03 AM CDT	Frost Advisory	DLH	30 hr
Jun 2, 2:32 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 16, 1:25 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 16, 2:52 PM CDT	Tornado Watch	SPC	6 hr
Jun 16, 3:49 PM CDT	Mesoscale Discussion	SPC	86 min
Jun 16, 3:58 PM CDT	Severe Thunderstorm Warning	DLH	62 min
Jun 16, 4:21 PM CDT	Tornado Warning	DLH	24 min
Jun 16, 4:40 PM CDT	Tornado Warning Tornado observed	DLH	50 min
Jun 16, 4:59 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DLH	61 min
Jun 16, 5:18 PM CDT	Tornado Warning	DLH	42 min
Jun 18, 2:23 PM CDT	Extreme Heat Watch	DLH	37 hr
Jun 20, 2:56 AM CDT	Heat Advisory	DLH	66 hr
Jun 20, 2:56 AM CDT	Extreme Heat Warning	DLH	66 hr
Jun 20, 2:06 PM CDT	Flood Watch	DLH	15 hr
Jun 20, 10:47 PM CDT	Mesoscale Discussion	SPC	118 min
Jun 20, 11:18 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 20, 11:24 PM CDT	Severe Thunderstorm Warning	DLH	66 min
Jun 21, 12:04 AM CDT	Severe Thunderstorm Warning Considerable damage threat	DLH	56 min
Jun 21, 12:30 AM CDT	Severe Thunderstorm Warning Considerable damage threat	DLH	60 min
Jun 21, 12:38 AM CDT	Tornado Warning	DLH	52 min
Jun 21, 12:53 AM CDT	Mesoscale Discussion	SPC	97 min
Jun 21, 1:02 AM CDT	Severe Thunderstorm Warning Destructive damage threat	DLH	58 min
Jun 21, 1:20 AM CDT	Severe Thunderstorm Warning Considerable damage threat	DLH	40 min
Jun 21, 1:59 AM CDT	Severe Thunderstorm Warning Considerable damage threat	DLH	61 min
Jun 22, 7:24 AM CDT	Mesoscale Discussion	SPC	96 min
Jun 22, 2:58 PM CDT	Tornado Watch	SPC	8 hr
Jun 23, 2:11 AM CDT	Severe Thunderstorm Warning	DLH	64 min
Jun 23, 2:23 AM CDT	Mesoscale Discussion	SPC	97 min
Jul 3, 2:15 AM CDT	Heat Advisory	DLH	42 hr
Jul 3, 2:18 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 4, 2:47 AM CDT	Extreme Heat Warning	DLH	17 hr
Jul 4, 2:58 AM CDT	Flood Watch	DLH	31 hr
Jul 4, 1:10 PM CDT	Mesoscale Discussion	SPC	3 hr
Jul 4, 2:03 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 4, 5:09 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 4, 7:51 PM CDT	Areal Flood Advisory	DLH	7 hr
Jul 4, 9:12 PM CDT	Severe Thunderstorm Warning	DLH	48 min
Jul 11, 1:27 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 11, 1:49 PM CDT	Flash Flood Warning	DLH	107 min
Jul 11, 3:04 PM CDT	Areal Flood Advisory	DLH	3 hr
Jul 11, 3:36 PM CDT	Areal Flood Advisory	DLH	84 min
Jul 14, 11:28 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 21, 2:36 PM CDT	Flood Watch	DLH	54 hr
Jul 22, 8:12 AM CDT	Severe Thunderstorm Warning	DLH	24 min
Jul 23, 7:15 AM CDT	Severe Thunderstorm Warning	DLH	39 min
Jul 23, 8:19 AM CDT	Areal Flood Advisory	DLH	4 hr
Jul 25, 2:28 PM CDT	Heat Advisory	DLH	30 hr
Jul 26, 2:55 AM CDT	Extreme Heat Watch	DLH	24 hr
Jul 27, 1:09 AM CDT	Mesoscale Discussion	SPC	96 min
Jul 27, 2:33 AM CDT	Heat Advisory	DLH	18 hr
Jul 27, 3:23 AM CDT	Mesoscale Discussion	SPC	97 min
Jul 27, 5:05 AM CDT	Severe Thunderstorm Warning	DLH	55 min
Jul 27, 5:55 AM CDT	Severe Thunderstorm Warning Considerable damage threat	DLH	65 min
Jul 27, 6:50 AM CDT	Severe Thunderstorm Warning	DLH	55 min
Jul 27, 5:33 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Aug 7, 4:12 AM CDT	Dense Fog Advisory	DLH	6 hr
Aug 7, 1:01 PM CDT	Heat Advisory	DLH	7 hr
Aug 8, 4:31 AM CDT	Mesoscale Discussion	SPC	89 min
Aug 8, 8:39 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 8, 9:34 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 8, 11:25 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 9, 1:36 AM CDT	Severe Thunderstorm Warning	DLH	35 min
Aug 9, 2:10 AM CDT	Severe Thunderstorm Warning	DLH	65 min
Aug 11, 4:38 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 18, 9:16 PM CDT	Dense Fog Advisory	DLH	12 hr
Aug 30, 2:31 AM CDT	Dense Fog Advisory	DLH	6 hr
Sep 3, 1:55 PM CDT	Frost Advisory	DLH	18 hr
Sep 6, 2:05 PM CDT	Frost Advisory	DLH	18 hr
Sep 9, 2:50 AM CDT	Dense Fog Advisory	DLH	9 hr
Sep 9, 7:06 PM CDT	Dense Fog Advisory	DLH	16 hr
Sep 10, 1:40 PM CDT	Dense Fog Advisory	DLH	23 hr
Sep 12, 10:29 AM CDT	Severe Thunderstorm Warning	DLH	61 min
Sep 12, 11:17 AM CDT	Mesoscale Discussion	SPC	58 min
Sep 12, 11:24 AM CDT	Severe Thunderstorm Warning	DLH	66 min
Sep 13, 4:31 AM CDT	Dense Fog Advisory	DLH	7 hr
Sep 21, 11:07 AM CDT	Dense Fog Advisory	DLH	48 hr
Sep 23, 7:05 PM CDT	Dense Fog Advisory	DLH	15 hr
Oct 3, 12:10 AM CDT	Dense Fog Advisory	DLH	9 hr
Oct 6, 1:29 PM CDT	Freeze Watch	DLH	13 hr
Oct 7, 2:30 AM CDT	Freeze Warning	DLH	32 hr
Oct 20, 2:27 PM CDT	Wind Advisory	DLH	28 hr
Oct 29, 6:54 PM CDT	Dense Fog Advisory	DLH	16 hr
Nov 2, 1:43 AM CST	Wind Advisory	DLH	26 hr
Nov 23, 2:28 PM CST	Winter Storm Watch	DLH	24 hr
Nov 24, 2:16 PM CST	Winter Storm Warning	DLH	48 hr
Nov 25, 2:06 PM CST	Winter Weather Advisory	DLH	20 hr
Dec 8, 2:35 AM CST	Winter Storm Watch	DLH	12 hr
Dec 8, 2:18 PM CST	Winter Storm Warning	DLH	37 hr
Dec 8, 2:18 PM CST	Winter Weather Advisory	DLH	37 hr
Dec 9, 11:56 AM CST	Mesoscale Discussion	SPC	5 hr
Dec 11, 1:39 PM CST	Cold Weather Advisory	DLH	68 hr
Dec 15, 12:59 PM CST	Wind Advisory	DLH	38 hr
Dec 17, 2:16 PM CST	Winter Weather Advisory	DLH	40 hr
Dec 25, 2:43 AM CST	Winter Weather Advisory	DLH	32 hr
Dec 26, 6:48 PM CST	Winter Weather Advisory	DLH	17 hr
Dec 26, 8:51 PM CST	Dense Fog Advisory	DLH	33 hr
Dec 27, 1:47 PM CST	Winter Weather Advisory	DLH	37 hr
Dec 30, 8:03 PM CST	Winter Weather Advisory	DLH	16 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	19
Tornado Warning	4
Severe Thunderstorm Watch	6
Tornado Watch	3
Mesoscale Discussion	20
Flooding
Flash Flood Warning	1
Flood Watch	3
Areal Flood Advisory	4
Winter
Winter Storm Warning	4
Winter Storm Watch	3
Winter Weather Advisory	11
Heat
Extreme Heat Warning	2
Extreme Heat Watch	2
Heat Advisory	5
Cold
Extreme Cold Warning	4
Freeze Warning	2
Extreme Cold Watch	2
Freeze Watch	1
Cold Weather Advisory	6
Frost Advisory	5
Wind and dust
Wind Advisory	4
Fire
Red Flag Warning	3
Fire Weather Watch	3
Fog and smoke
Dense Fog Advisory	12

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2024 2026

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.