Alert archive / Minnesota / Mahnomen County

Weather alerts in Mahnomen County, Minnesota, 2024

85 weather alerts in 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Mahnomen County and its neighbors

Each county as a circle sized by its count in 2024. Tap one for its archive.

Alerts: 85
Warnings: 26
Watches: 10
Advisories: 32
Busiest month: June20 alerts
Busiest day: June 18, 20246 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 3 tornado warnings covering Mahnomen County in 2024 had a tornado report inside them.

Mahnomen County, 2024

	Warnings	With a report	False alarm ratio
Tornado warnings	3	0	100%
Severe thunderstorm warnings	10	9	10%
Flash flood warnings	0

Each office's whole area, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Grand Forks, ND: tornado warnings	20	5	75%	6	83%	13 min
NWS Grand Forks, ND: severe thunderstorm warnings	154	91	41%	197	76%	24 min
NWS Grand Forks, ND: flash flood warnings	12	6	50%	7	86%	104 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, 9:50 PM CST	Winter Weather Advisory	FGF	36 hr
Jan 13, 3:25 PM CST	Wind Chill Advisory	FGF	72 hr
Jan 19, 2:25 PM CST	Wind Chill Advisory	FGF	19 hr
Jan 21, 4:41 PM CST	Winter Weather Advisory	FGF	13 hr
Jan 25, 4:47 PM CST	Dense Fog Advisory	FGF	19 hr
Jan 26, 9:03 PM CST	Dense Fog Advisory	FGF	13 hr
Jan 27, 9:48 PM CST	Dense Fog Advisory	FGF	12 hr
Jan 30, 5:45 PM CST	Dense Fog Advisory	FGF	9 hr
Jan 31, 8:30 PM CST	Dense Fog Advisory	FGF	13 hr
Feb 3, 5:48 PM CST	Dense Fog Advisory	FGF	42 hr
Feb 25, 3:30 PM CST	Winter Storm Watch	FGF	28 hr
Feb 26, 7:23 PM CST	Winter Storm Warning	FGF	22 hr
Feb 27, 8:45 AM CST	Mesoscale Discussion	SPC	4 hr
Feb 27, 5:56 PM CST	Wind Chill Advisory	FGF	15 hr
Mar 3, 4:42 AM CST	Wind Advisory	FGF	25 hr
Mar 22, 3:46 AM CDT	Winter Storm Watch	FGF	34 hr
Mar 23, 1:37 PM CDT	Winter Storm Warning	FGF	61 hr
Mar 26, 2:59 AM CDT	Winter Weather Advisory	FGF	31 hr
Apr 5, 3:04 PM CDT	Fire Weather Watch	FGF	12 hr
Apr 6, 2:58 AM CDT	Red Flag Warning	FGF	16 hr
Apr 15, 2:49 PM CDT	Wind Advisory	FGF	28 hr
Apr 25, 12:45 PM CDT	Red Flag Warning	FGF	7 hr
May 17, 11:37 PM CDT	Mesoscale Discussion	SPC	83 min
May 21, 2:55 AM CDT	Wind Advisory	FGF	19 hr
Jun 4, 12:24 PM CDT	Mesoscale Discussion	SPC	3 hr
Jun 12, 2:33 PM CDT	Mesoscale Discussion	SPC	117 min
Jun 12, 3:32 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 12, 4:05 PM CDT	Severe Thunderstorm Warning	FGF	55 min
Jun 16, 4:37 PM CDT	Flood Watch	FGF	38 hr
Jun 18, 1:49 AM CDT	Mesoscale Discussion	SPC	86 min
Jun 18, 2:08 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 18, 2:22 AM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	38 min
Jun 18, 2:50 AM CDT	Severe Thunderstorm Warning	FGF	40 min
Jun 18, 3:24 AM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	66 min
Jun 18, 4:20 AM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	55 min
Jun 24, 5:43 PM CDT	Mesoscale Discussion	SPC	77 min
Jun 24, 5:52 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 24, 7:53 PM CDT	Mesoscale Discussion	SPC	97 min
Jun 28, 9:42 PM CDT	Mesoscale Discussion	SPC	63 min
Jun 28, 10:03 PM CDT	Tornado Warning	FGF	27 min
Jun 28, 10:15 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	45 min
Jun 28, 10:31 PM CDT	Tornado Warning	FGF	29 min
Jun 28, 10:32 PM CDT	Tornado Warning	FGF	28 min
Jun 28, 10:53 PM CDT	Severe Thunderstorm Warning	FGF	52 min
Jul 6, 6:14 PM CDT	Special Weather Statement	FGF	31 min
Jul 13, 3:44 PM CDT	Mesoscale Discussion	SPC	91 min
Jul 13, 5:38 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 13, 6:59 PM CDT	Special Weather Statement	FGF	46 min
Jul 13, 7:16 PM CDT	Mesoscale Discussion	SPC	89 min
Jul 13, 8:13 PM CDT	Severe Thunderstorm Warning	FGF	62 min
Jul 23, 12:25 AM CDT	Special Weather Statement	FGF	35 min
Jul 23, 1:07 AM CDT	Special Weather Statement	FGF	38 min
Jul 30, 2:09 AM CDT	Special Weather Statement	FGF	66 min
Jul 31, 12:14 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 31, 2:09 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	51 min
Jul 31, 2:54 PM CDT	Severe Thunderstorm Warning	FGF	66 min
Aug 3, 1:09 PM CDT	Mesoscale Discussion	SPC	3 hr
Aug 24, 2:41 AM CDT	Heat Advisory	FGF	41 hr
Aug 25, 11:53 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 29, 2:24 PM CDT	Wind Advisory	FGF	31 hr
Sep 30, 3:15 AM CDT	Red Flag Warning	FGF	18 hr
Oct 2, 2:06 PM CDT	Frost Advisory	FGF	19 hr
Oct 3, 1:31 PM CDT	Frost Advisory	FGF	18 hr
Oct 4, 2:50 AM CDT	High Wind Watch	FGF	24 hr
Oct 4, 2:26 PM CDT	Red Flag Warning	FGF	31 hr
Oct 5, 2:59 AM CDT	Wind Advisory	FGF	27 hr
Oct 13, 10:30 AM CDT	Freeze Warning	FGF	23 hr
Oct 15, 2:01 PM CDT	Red Flag Warning	FGF	29 hr
Oct 16, 3:40 PM CDT	Red Flag Warning	FGF	27 hr
Oct 19, 3:30 AM CDT	Dense Fog Advisory	FGF	10 hr
Nov 3, 11:29 PM CST	Dense Fog Advisory	FGF	6 hr
Nov 19, 3:31 AM CST	Winter Weather Advisory	FGF	38 hr
Dec 3, 12:33 PM CST	Winter Weather Advisory	FGF	29 hr
Dec 4, 8:26 AM CST	Snow Squall Warning Significant damage threat	FGF	34 min
Dec 4, 8:56 AM CST	Snow Squall Warning	FGF	34 min
Dec 4, 9:16 AM CST	Snow Squall Warning Significant damage threat	FGF	29 min
Dec 7, 1:57 PM CST	Winter Weather Advisory	FGF	34 hr
Dec 9, 2:49 AM CST	Winter Weather Advisory	FGF	12 hr
Dec 10, 3:38 AM CST	Cold Weather Advisory	FGF	54 hr
Dec 13, 1:06 PM CST	Winter Weather Advisory	FGF	47 hr
Dec 18, 1:16 PM CST	Winter Storm Warning	FGF	29 hr
Dec 23, 6:45 PM CST	Dense Fog Advisory	FGF	17 hr
Dec 26, 1:42 PM CST	Dense Fog Advisory	FGF	22 hr
Dec 27, 7:41 PM CST	Dense Fog Advisory	FGF	13 hr
Dec 28, 8:40 PM CST	Dense Fog Advisory	FGF	46 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	10
Tornado Warning	3
Severe Thunderstorm Watch	5
Mesoscale Discussion	12
Special Weather Statement	5
Flooding
Flood Watch	1
Winter
Snow Squall Warning	3
Winter Storm Warning	3
Winter Storm Watch	2
Winter Weather Advisory	8
Heat
Heat Advisory	1
Cold
Freeze Warning	1
Cold Weather Advisory	1
Frost Advisory	2
Wind Chill Advisory	3
Wind and dust
High Wind Watch	1
Wind Advisory	5
Fire
Red Flag Warning	6
Fire Weather Watch	1
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 2023 2025

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.