Alert archive / Minnesota / Mahnomen County

Weather alerts in Mahnomen County, Minnesota, 2022

161 weather alerts in 2022, 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 2022. Tap one for its archive.

Alerts: 161
Warnings: 47
Watches: 21
Advisories: 65
Busiest month: May28 alerts
Busiest day: June 25, 20229 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 2 tornado warnings covering Mahnomen County in 2022 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 16 minutes after it went out.

Mahnomen County, 2022

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	2	2	0%	2	100%	16 min
Severe thunderstorm warnings	25	25	0%	7	100%	17 min
Flash flood warnings	0			0

Each office's whole area, 2022

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Grand Forks, ND: tornado warnings	34	18	47%	59	75%	12 min
NWS Grand Forks, ND: severe thunderstorm warnings	228	203	11%	743	87%	27 min
NWS Grand Forks, ND: flash flood warnings	11	8	27%	13	85%	207 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 2, 3:14 AM CST	Wind Chill Advisory	FGF	12 hr
Jan 4, 3:28 AM CST	Winter Weather Advisory	FGF	39 hr
Jan 5, 3:39 AM CST	Wind Chill Advisory	FGF	62 hr
Jan 5, 2:46 PM CST	Wind Chill Warning	FGF	45 hr
Jan 7, 2:58 PM CST	Winter Weather Advisory	FGF	12 hr
Jan 8, 2:41 PM CST	Wind Chill Advisory	FGF	45 hr
Jan 9, 3:45 PM CST	Wind Chill Warning	FGF	20 hr
Jan 13, 2:52 AM CST	Winter Weather Advisory	FGF	33 hr
Jan 17, 2:14 PM CST	Winter Weather Advisory	FGF	34 hr
Jan 18, 3:43 AM CST	Wind Chill Advisory	FGF	3 days
Jan 19, 3:01 PM CST	Wind Chill Warning	FGF	21 hr
Jan 20, 11:59 AM CST	Wind Chill Advisory	FGF	15 hr
Jan 21, 4:07 AM CST	Winter Weather Advisory	FGF	11 hr
Jan 21, 3:03 PM CST	Winter Weather Advisory	FGF	2 hr
Jan 22, 3:14 AM CST	Wind Chill Advisory	FGF	9 hr
Jan 22, 2:49 PM CST	Wind Chill Advisory	FGF	21 hr
Jan 24, 3:13 AM CST	Wind Chill Warning	FGF	48 hr
Jan 24, 3:13 AM CST	Wind Chill Advisory	FGF	18 hr
Jan 26, 3:31 AM CST	Wind Chill Advisory	FGF	5 hr
Jan 27, 1:16 PM CST	Wind Chill Advisory	FGF	17 hr
Jan 31, 12:09 PM CST	Winter Weather Advisory	FGF	32 hr
Feb 1, 2:42 PM CST	Wind Chill Advisory	FGF	3 days
Feb 2, 3:15 AM CST	Wind Chill Warning	FGF	33 hr
Feb 9, 11:55 AM CST	Winter Weather Advisory	FGF	7 hr
Feb 10, 4:17 AM CST	Winter Weather Advisory	FGF	32 hr
Feb 10, 12:52 PM CST	Blizzard Warning	FGF	26 hr
Feb 11, 10:22 AM CST	Wind Chill Advisory	FGF	27 hr
Feb 12, 2:34 PM CST	Wind Chill Advisory	FGF	21 hr
Feb 14, 12:42 AM CST	Wind Chill Advisory	FGF	9 hr
Feb 16, 4:02 AM CST	Wind Chill Advisory	FGF	32 hr
Feb 16, 4:02 AM CST	Winter Storm Watch	FGF	33 hr
Feb 17, 1:10 PM CST	Blizzard Warning	FGF	29 hr
Feb 18, 10:50 AM CST	Winter Weather Advisory	FGF	10 hr
Feb 18, 5:49 PM CST	Wind Chill Advisory	FGF	15 hr
Feb 19, 2:53 PM CST	Winter Storm Watch	FGF	24 hr
Feb 19, 2:53 PM CST	Winter Weather Advisory	FGF	22 hr
Feb 20, 2:50 PM CST	Wind Chill Advisory	FGF	69 hr
Feb 20, 2:50 PM CST	Winter Weather Advisory	FGF	54 hr
Feb 21, 8:59 AM CST	Mesoscale Discussion	SPC	5 hr
Feb 21, 3:04 PM CST	Mesoscale Discussion	SPC	5 hr
Feb 23, 2:25 PM CST	Wind Chill Advisory	FGF	22 hr
Feb 24, 2:28 PM CST	Wind Chill Advisory	FGF	21 hr
Mar 2, 3:00 PM CST	Wind Chill Advisory	FGF	18 hr
Mar 9, 2:23 PM CST	Wind Chill Advisory	FGF	19 hr
Mar 10, 3:19 PM CST	Winter Weather Advisory	FGF	27 hr
Mar 10, 6:24 PM CST	Mesoscale Discussion	SPC	3 hr
Mar 10, 7:22 PM CST	Snow Squall Warning	FGF	38 min
Mar 10, 8:07 PM CST	Snow Squall Warning	FGF	53 min
Mar 11, 12:47 PM CST	Wind Chill Advisory	FGF	21 hr
Mar 24, 2:45 PM CDT	Wind Advisory	FGF	28 hr
Mar 30, 6:16 AM CDT	Winter Weather Advisory	FGF	7 hr
Mar 30, 7:32 AM CDT	Winter Storm Warning	FGF	5 hr
Apr 5, 3:13 PM CDT	Winter Weather Advisory	FGF	44 hr
Apr 13, 12:48 PM CDT	Winter Weather Advisory	FGF	42 hr
Apr 17, 3:39 AM CDT	Winter Weather Advisory	FGF	29 hr
Apr 17, 1:25 PM CDT	Mesoscale Discussion	SPC	4 hr
Apr 20, 11:11 AM CDT	Winter Weather Advisory	FGF	3 hr
Apr 22, 11:27 AM CDT	Flood Watch	FGF	20 hr
Apr 23, 4:32 AM CDT	Areal Flood Warning	FGF	11 hr
Apr 23, 12:55 PM CDT	Tornado Watch	SPC	6 hr
Apr 23, 5:10 PM CDT	Areal Flood Warning	FGF	4 days
Apr 23, 6:09 PM CDT	Areal Flood Warning	FGF	4 days
Apr 23, 6:16 PM CDT	Mesoscale Discussion	SPC	59 min
Apr 28, 1:43 PM CDT	Flood Watch	FGF	65 hr
Apr 30, 12:41 PM CDT	Areal Flood Warning	FGF	6 days
May 8, 12:38 AM CDT	High Wind Warning	FGF	2 hr
May 8, 3:04 PM CDT	Flood Watch	FGF	22 hr
May 8, 3:22 PM CDT	Wind Advisory	FGF	31 hr
May 11, 7:20 PM CDT	Mesoscale Discussion	SPC	115 min
May 12, 4:22 AM CDT	Flood Watch	FGF	20 hr
May 12, 5:35 PM CDT	Tornado Watch	SPC	6 hr
May 12, 7:47 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	58 min
May 13, 2:30 AM CDT	Wind Advisory	FGF	18 hr
May 18, 2:17 PM CDT	Severe Thunderstorm Warning	FGF	43 min
May 18, 2:49 PM CDT	Severe Thunderstorm Warning	FGF	41 min
May 18, 3:27 PM CDT	Severe Thunderstorm Warning	FGF	63 min
May 18, 3:27 PM CDT	Severe Thunderstorm Warning	FGF	63 min
May 20, 3:11 AM CDT	Frost Advisory	FGF	30 hr
May 21, 2:25 PM CDT	Frost Advisory	FGF	17 hr
May 22, 2:40 PM CDT	Frost Advisory	FGF	14 hr
May 29, 5:59 AM CDT	Severe Thunderstorm Warning	FGF	31 min
May 29, 6:19 AM CDT	Severe Thunderstorm Warning	FGF	41 min
May 29, 6:50 AM CDT	Severe Thunderstorm Warning	FGF	40 min
May 29, 7:27 AM CDT	Severe Thunderstorm Warning	FGF	63 min
May 29, 3:14 PM CDT	Mesoscale Discussion	SPC	91 min
May 29, 3:41 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 29, 5:43 PM CDT	Mesoscale Discussion	SPC	2 hr
May 30, 2:03 AM CDT	Mesoscale Discussion	SPC	117 min
May 30, 2:35 AM CDT	Flood Watch	FGF	25 hr
May 30, 2:46 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 30, 4:58 AM CDT	Mesoscale Discussion	SPC	92 min
May 30, 5:33 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	57 min
May 30, 9:51 PM CDT	Special Weather Statement	FGF	39 min
Jun 12, 2:26 PM CDT	Mesoscale Discussion	SPC	94 min
Jun 14, 5:26 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 14, 2:36 PM CDT	Mesoscale Discussion	SPC	114 min
Jun 14, 3:00 PM CDT	Severe Thunderstorm Warning	FGF	45 min
Jun 14, 3:44 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 18, 4:51 AM CDT	Heat Advisory	FGF	63 hr
Jun 20, 1:49 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 20, 3:19 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 20, 3:50 PM CDT	Special Weather Statement	FGF	40 min
Jun 20, 5:01 PM CDT	Mesoscale Discussion	SPC	89 min
Jun 20, 5:25 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	65 min
Jun 20, 7:04 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	56 min
Jun 20, 7:15 PM CDT	Tornado Warning	FGF	24 min
Jun 20, 7:16 PM CDT	Mesoscale Discussion	SPC	89 min
Jun 20, 7:52 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	53 min
Jun 24, 1:40 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 24, 3:46 PM CDT	Mesoscale Discussion	SPC	119 min
Jun 24, 6:13 PM CDT	Mesoscale Discussion	SPC	92 min
Jun 24, 7:17 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 24, 8:09 PM CDT	Special Weather Statement	FGF	36 min
Jun 24, 8:10 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	65 min
Jun 24, 8:36 PM CDT	Severe Thunderstorm Warning	FGF	54 min
Jun 24, 8:43 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	62 min
Jun 24, 9:00 PM CDT	Tornado Warning	FGF	32 min
Jun 24, 9:06 PM CDT	Mesoscale Discussion	SPC	84 min
Jun 24, 9:24 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	66 min
Jun 24, 9:38 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	67 min
Jul 10, 7:47 AM CDT	Severe Thunderstorm Watch	SPC	3 hr
Jul 10, 8:33 AM CDT	Severe Thunderstorm Warning	FGF	57 min
Jul 10, 9:24 AM CDT	Severe Thunderstorm Warning	FGF	66 min
Jul 10, 9:49 AM CDT	Mesoscale Discussion	SPC	86 min
Jul 22, 9:57 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 22, 11:27 PM CDT	Mesoscale Discussion	SPC	63 min
Jul 23, 12:43 AM CDT	Severe Thunderstorm Warning Destructive damage threat	FGF	62 min
Jul 23, 1:32 AM CDT	Mesoscale Discussion	SPC	88 min
Jul 23, 1:40 AM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	65 min
Aug 5, 3:57 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 5, 5:20 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 5, 8:01 PM CDT	Severe Thunderstorm Warning	FGF	29 min
Aug 5, 8:19 PM CDT	Severe Thunderstorm Warning	FGF	42 min
Aug 28, 3:09 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 28, 4:41 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 21, 2:53 PM CDT	Frost Advisory	FGF	19 hr
Sep 26, 2:33 PM CDT	Frost Advisory	FGF	18 hr
Sep 27, 2:05 PM CDT	Frost Advisory	FGF	19 hr
Nov 5, 2:45 AM CDT	Wind Advisory	FGF	40 hr
Nov 8, 3:54 AM CST	Winter Storm Watch	FGF	32 hr
Nov 9, 12:10 PM CST	Winter Storm Warning	FGF	39 hr
Nov 9, 12:10 PM CST	Winter Weather Advisory	FGF	48 hr
Nov 10, 10:38 AM CST	Mesoscale Discussion	SPC	4 hr
Nov 27, 1:18 PM CST	Dense Fog Advisory	FGF	5 hr
Dec 1, 2:02 PM CST	Winter Weather Advisory	FGF	31 hr
Dec 2, 3:11 AM CST	Wind Chill Advisory	FGF	31 hr
Dec 5, 2:53 PM CST	Winter Weather Advisory	FGF	22 hr
Dec 9, 9:37 PM CST	Winter Weather Advisory	FGF	14 hr
Dec 12, 2:09 PM CST	Winter Storm Warning	FGF	46 hr
Dec 12, 2:09 PM CST	Winter Weather Advisory	FGF	46 hr
Dec 14, 11:58 AM CST	Winter Weather Advisory	FGF	21 hr
Dec 14, 2:00 PM CST	Winter Storm Warning	FGF	31 hr
Dec 15, 10:46 AM CST	Mesoscale Discussion	SPC	4 hr
Dec 15, 6:56 PM CST	Winter Weather Advisory	FGF	29 hr
Dec 18, 7:08 AM CST	Wind Chill Advisory	FGF	5 hr
Dec 19, 3:18 AM CST	Wind Chill Advisory	FGF	6 days
Dec 20, 4:18 AM CST	Wind Chill Warning	FGF	23 hr
Dec 20, 2:08 PM CST	Wind Chill Advisory	FGF	4 days
Dec 20, 2:08 PM CST	Winter Weather Advisory	FGF	37 hr
Dec 22, 11:44 AM CST	Blizzard Warning	FGF	30 hr
Dec 25, 9:57 PM CST	Wind Chill Advisory	FGF	14 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	25
Tornado Warning	2
Severe Thunderstorm Watch	11
Tornado Watch	2
Mesoscale Discussion	25
Special Weather Statement	3
Flooding
Areal Flood Warning	4
Flood Watch	5
Winter
Blizzard Warning	3
Snow Squall Warning	2
Winter Storm Warning	4
Winter Storm Watch	3
Winter Weather Advisory	26
Heat
Heat Advisory	1
Cold
Wind Chill Warning	6
Frost Advisory	6
Wind Chill Advisory	27
Wind and dust
High Wind Warning	1
Wind Advisory	4
Fog and smoke
Dense Fog Advisory	1

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2021 2023

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.