Alert archive / North Dakota / McHenry County

Weather alerts in McHenry County, North Dakota, 2026

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

McHenry County and its neighbors

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

Alerts: 139
Warnings: 49
Watches: 17
Advisories: 47
Busiest month: June43 alerts
Busiest day: June 29, 202614 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 McHenry County in 2026 had a tornado report inside them.

McHenry County, 2026

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	0	100%	0
Severe thunderstorm warnings	33	18	45%	14	93%	26 min
Flash flood warnings	3	0	100%	0

Each office's whole area, 2026

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Bismarck, ND: tornado warnings	21	4	81%	11	36%	13 min
NWS Bismarck, ND: severe thunderstorm warnings	354	164	54%	360	84%	24 min
NWS Bismarck, ND: flash flood warnings	4	0	100%	0

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.

Issued	Product	Office	Lasted
Jan 4, 3:52 AM CST	Winter Weather Advisory	BIS	14 hr
Jan 4, 5:55 PM CST	Dense Fog Advisory	BIS	30 hr
Jan 7, 7:27 PM CST	Winter Weather Advisory	BIS	5 hr
Jan 14, 1:50 AM CST	High Wind Watch	BIS	25 hr
Jan 15, 2:51 AM CST	Wind Advisory	BIS	39 hr
Jan 16, 2:28 AM CST	Winter Weather Advisory	BIS	22 hr
Jan 16, 1:02 PM CST	Cold Weather Advisory	BIS	23 hr
Jan 17, 2:29 AM CST	Wind Advisory	BIS	40 hr
Jan 17, 1:57 PM CST	Winter Weather Advisory	BIS	31 hr
Jan 18, 2:21 PM CST	Cold Weather Advisory	BIS	20 hr
Jan 20, 1:41 PM CST	Extreme Cold Watch	BIS	25 hr
Jan 20, 1:52 PM CST	Winter Weather Advisory	BIS	30 hr
Jan 21, 2:22 PM CST	Extreme Cold Warning	BIS	4 days
Jan 23, 11:41 AM CST	Cold Weather Advisory	BIS	69 hr
Jan 26, 4:33 AM CST	Wind Advisory	BIS	17 hr
Jan 26, 1:39 PM CST	Cold Weather Advisory	BIS	20 hr
Jan 29, 1:55 PM CST	Cold Weather Advisory	BIS	20 hr
Jan 30, 2:55 AM CST	Winter Weather Advisory	BIS	45 hr
Feb 7, 8:07 PM CST	Dense Fog Advisory	BIS	16 hr
Feb 15, 1:35 PM CST	Winter Storm Watch	BIS	37 hr
Feb 17, 2:11 AM CST	Winter Storm Warning	BIS	46 hr
Feb 19, 1:11 PM CST	Cold Weather Advisory	BIS	21 hr
Feb 26, 12:42 PM CST	Wind Advisory	BIS	28 hr
Mar 3, 4:39 AM CST	Dense Fog Advisory	BIS	7 hr
Mar 3, 9:22 PM CST	Dense Fog Advisory	BIS	11 hr
Mar 5, 5:51 PM CST	Dense Fog Advisory	BIS	9 hr
Mar 5, 8:04 PM CST	Winter Weather Advisory	BIS	10 hr
Mar 10, 1:34 PM CDT	High Wind Watch	BIS	24 hr
Mar 11, 1:20 PM CDT	High Wind Warning	BIS	38 hr
Mar 11, 1:20 PM CDT	Winter Weather Advisory	BIS	38 hr
Apr 2, 12:29 PM CDT	Winter Weather Advisory	BIS	40 hr
Apr 7, 1:16 PM CDT	Wind Advisory	BIS	30 hr
Apr 11, 8:42 PM CDT	Dense Fog Advisory	BIS	13 hr
Apr 22, 1:09 PM CDT	Wind Advisory	BIS	33 hr
Apr 24, 11:26 AM CDT	Wind Advisory	BIS	8 hr
May 2, 4:18 AM CDT	Fire Weather Watch	BIS	9 hr
May 2, 1:13 PM CDT	Red Flag Warning	BIS	32 hr
May 8, 1:35 PM CDT	Frost Advisory	BIS	19 hr
May 9, 11:39 AM CDT	Freeze Warning	BIS	21 hr
May 10, 1:34 AM CDT	Fire Weather Watch	BIS	23 hr
May 11, 12:51 AM CDT	Red Flag Warning	BIS	21 hr
May 11, 12:34 PM CDT	Wind Advisory	BIS	30 hr
May 11, 2:01 PM CDT	Red Flag Warning	BIS	31 hr
May 11, 6:42 PM CDT	Mesoscale Discussion	SPC	93 min
May 13, 1:28 AM CDT	Fire Weather Watch	BIS	21 hr
May 13, 1:47 PM CDT	High Wind Warning	BIS	37 hr
May 13, 1:47 PM CDT	Wind Advisory	BIS	55 hr
May 13, 2:02 PM CDT	Red Flag Warning	BIS	55 hr
May 14, 12:44 PM CDT	Blowing Dust Advisory	BIS	11 hr
May 14, 2:00 PM CDT	Blowing Dust Warning	BIS	7 hr
May 18, 12:34 PM CDT	Freeze Warning	BIS	20 hr
May 19, 11:35 AM CDT	Frost Advisory	BIS	21 hr
May 29, 12:23 PM CDT	Wind Advisory	BIS	9 hr
Jun 2, 11:59 AM CDT	Mesoscale Discussion	SPC	91 min
Jun 2, 1:44 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 2, 2:34 PM CDT	Severe Thunderstorm Warning	BIS	26 min
Jun 2, 3:04 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 2, 3:29 PM CDT	Severe Thunderstorm Warning	BIS	30 min
Jun 7, 1:17 AM CDT	Wind Advisory	BIS	19 hr
Jun 7, 2:50 PM CDT	Mesoscale Discussion	SPC	115 min
Jun 7, 3:58 PM CDT	Severe Thunderstorm Watch PDS	SPC	11 hr
Jun 7, 9:01 PM CDT	Mesoscale Discussion	SPC	89 min
Jun 7, 9:28 PM CDT	Severe Thunderstorm Warning Destructive damage threat	BIS	47 min
Jun 7, 9:52 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	53 min
Jun 7, 10:02 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	43 min
Jun 7, 10:12 PM CDT	Severe Thunderstorm Warning Destructive damage threat	BIS	63 min
Jun 7, 10:43 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	77 min
Jun 7, 11:08 PM CDT	Mesoscale Discussion	SPC	97 min
Jun 9, 4:32 PM CDT	Tornado Watch	SPC	8 hr
Jun 9, 6:52 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	53 min
Jun 9, 6:59 PM CDT	Tornado Warning	BIS	46 min
Jun 9, 7:18 PM CDT	Mesoscale Discussion	SPC	117 min
Jun 9, 7:34 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	56 min
Jun 16, 6:49 PM CDT	Special Weather Statement	BIS	41 min
Jun 16, 6:57 PM CDT	Severe Thunderstorm Warning	BIS	48 min
Jun 16, 7:36 PM CDT	Severe Thunderstorm Warning	BIS	39 min
Jun 27, 9:37 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 27, 10:29 PM CDT	Severe Thunderstorm Warning	BIS	61 min
Jun 27, 11:10 PM CDT	Severe Thunderstorm Warning	BIS	65 min
Jun 27, 11:30 PM CDT	Severe Thunderstorm Warning	BIS	60 min
Jun 28, 6:43 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 28, 10:02 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	58 min
Jun 28, 10:18 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	57 min
Jun 28, 10:21 PM CDT	Mesoscale Discussion	SPC	114 min
Jun 28, 10:28 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	25 min
Jun 28, 11:31 PM CDT	Special Weather Statement	BIS	29 min
Jun 28, 11:43 PM CDT	Severe Thunderstorm Warning	BIS	62 min
Jun 29, 12:41 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 29, 2:00 PM CDT	Tornado Watch	SPC	10 hr
Jun 29, 2:18 PM CDT	Severe Thunderstorm Warning	BIS	57 min
Jun 29, 3:06 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	54 min
Jun 29, 4:00 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	60 min
Jun 29, 4:11 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	49 min
Jun 29, 4:54 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	66 min
Jun 29, 5:58 PM CDT	Areal Flood Advisory	BIS	3 hr
Jun 30, 2:18 AM CDT	Wind Advisory	BIS	15 hr
Jul 5, 2:47 PM CDT	Mesoscale Discussion	SPC	118 min
Jul 5, 3:30 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 5, 9:38 PM CDT	Mesoscale Discussion	SPC	97 min
Jul 9, 2:04 AM CDT	Extreme Heat Watch	BIS	24 hr
Jul 9, 9:15 AM CDT	Special Weather Statement	BIS	30 min
Jul 9, 5:27 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 9, 5:30 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	38 min
Jul 10, 2:02 AM CDT	Extreme Heat Warning	BIS	5 days
Jul 16, 5:11 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 24, 2:36 PM CDT	Mesoscale Discussion	SPC	84 min
Jul 28, 2:43 AM CDT	Dense Fog Advisory	BIS	7 hr
Jul 29, 1:46 AM CDT	Heat Advisory	BIS	18 hr
Jul 29, 2:52 PM CDT	Mesoscale Discussion	SPC	113 min
Aug 10, 8:02 AM CDT	Special Weather Statement	BIS	28 min
Aug 10, 9:19 AM CDT	Severe Thunderstorm Warning	BIS	41 min
Aug 10, 10:00 AM CDT	Severe Thunderstorm Warning	BIS	45 min
Aug 10, 3:15 PM CDT	Special Weather Statement	BIS	30 min
Aug 23, 6:00 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	44 min
Aug 30, 12:40 PM CDT	Wind Advisory	BIS	30 hr
Aug 30, 4:38 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 3, 5:28 AM CDT	Severe Thunderstorm Warning	BIS	62 min
Sep 3, 6:18 AM CDT	Flash Flood Warning	BIS	3 hr
Sep 3, 6:50 AM CDT	Special Weather Statement	BIS	40 min
Sep 3, 7:01 AM CDT	Severe Thunderstorm Warning	BIS	44 min
Sep 3, 7:22 AM CDT	Flash Flood Warning	BIS	3 hr
Sep 3, 7:54 AM CDT	Special Weather Statement	BIS	36 min
Sep 3, 8:41 AM CDT	Areal Flood Advisory	BIS	51 min
Sep 3, 8:46 AM CDT	Special Weather Statement	BIS	29 min
Sep 3, 9:13 AM CDT	Flash Flood Warning	BIS	2 hr
Sep 3, 9:26 AM CDT	Severe Thunderstorm Warning	BIS	34 min
Sep 4, 1:53 AM CDT	Dense Fog Advisory	BIS	10 hr
Sep 5, 9:21 AM CDT	Severe Thunderstorm Warning	BIS	54 min
Sep 7, 10:42 AM CDT	Special Weather Statement	BIS	33 min
Sep 7, 1:11 PM CDT	Wind Advisory	BIS	30 hr
Sep 7, 3:53 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 7, 5:42 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Sep 7, 6:08 PM CDT	Severe Thunderstorm Warning	BIS	67 min
Sep 7, 7:04 PM CDT	Severe Thunderstorm Warning	BIS	56 min
Sep 7, 7:34 PM CDT	Mesoscale Discussion	SPC	116 min
Sep 13, 1:00 PM CDT	Wind Advisory	BIS	42 hr
Sep 17, 4:14 AM CDT	Dense Fog Advisory	BIS	9 hr
Sep 25, 12:47 AM CDT	Dense Fog Advisory	BIS	10 hr
Sep 29, 3:14 AM CDT	Dense Fog Advisory	BIS	7 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	33
Tornado Warning	1
Severe Thunderstorm Watch	7
Tornado Watch	2
Mesoscale Discussion	17
Special Weather Statement	9
Flooding
Flash Flood Warning	3
Areal Flood Advisory	2
Winter
Winter Storm Warning	1
Winter Storm Watch	1
Winter Weather Advisory	9
Heat
Extreme Heat Warning	1
Extreme Heat Watch	1
Heat Advisory	1
Cold
Extreme Cold Warning	1
Freeze Warning	2
Extreme Cold Watch	1
Cold Weather Advisory	6
Frost Advisory	2
Wind and dust
Blowing Dust Warning	1
High Wind Warning	2
High Wind Watch	2
Blowing Dust Advisory	1
Wind Advisory	15
Fire
Red Flag Warning	4
Fire Weather Watch	3
Fog and smoke
Dense Fog Advisory	11

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 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.