Weather alerts in Marshall County, Iowa, 2026

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

Marshall County and its neighbors

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

Alerts: 152
Warnings: 60
Watches: 30
Advisories: 21
Busiest month: July33 alerts
Busiest day: July 20, 202610 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 5 tornado warnings covering Marshall County in 2026 had a tornado report inside them.

Marshall County, 2026

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	5	0	100%	0
Severe thunderstorm warnings	39	27	31%	15	87%	28 min
Flash flood warnings	4	3	25%	0

Each office's whole area, 2026

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Des Moines, IA: tornado warnings	78	21	73%	32	81%	21 min
NWS Des Moines, IA: severe thunderstorm warnings	343	160	53%	469	84%	23 min
NWS Des Moines, IA: flash flood warnings	31	11	65%	25	76%	92 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.

Issued	Product	Office	Lasted
Jan 5, 8:25 PM CST	Dense Fog Advisory	DMX	19 hr
Jan 6, 9:38 PM CST	Dense Fog Advisory	DMX	11 hr
Jan 15, 2:01 PM CST	Winter Weather Advisory	DMX	31 hr
Jan 17, 2:07 PM CST	Cold Weather Advisory	DMX	46 hr
Jan 17, 2:07 PM CST	Winter Weather Advisory	DMX	34 hr
Jan 20, 2:30 PM CST	Extreme Cold Watch	DMX	45 hr
Jan 21, 2:29 AM CST	Wind Advisory	DMX	12 hr
Jan 21, 11:27 AM CST	High Wind Warning	DMX	8 hr
Jan 22, 2:28 AM CST	Extreme Cold Warning	DMX	34 hr
Jan 22, 11:08 AM CST	Cold Weather Advisory	DMX	40 hr
Jan 25, 2:04 AM CST	Cold Weather Advisory	DMX	31 hr
Feb 17, 2:31 PM CST	Wind Advisory	DMX	27 hr
Feb 17, 2:41 PM CST	Fire Weather Watch	DMX	6 hr
Feb 17, 8:15 PM CST	Red Flag Warning	DMX	23 hr
Feb 18, 2:43 PM CST	Winter Weather Advisory	DMX	42 hr
Feb 19, 10:45 AM CST	Winter Storm Warning	DMX	22 hr
Feb 19, 6:07 PM CST	Mesoscale Discussion	SPC	6 hr
Feb 25, 7:12 PM CST	Special Weather Statement	DMX	63 min
Feb 25, 8:07 PM CST	Special Weather Statement	DMX	113 min
Mar 6, 8:18 PM CST	Tornado Watch	SPC	6 hr
Mar 6, 9:43 PM CST	Mesoscale Discussion	SPC	2 hr
Mar 11, 11:23 AM CDT	High Wind Watch	DMX	10 hr
Mar 11, 9:33 PM CDT	High Wind Warning	DMX	35 hr
Mar 12, 10:04 AM CDT	Wind Advisory	DMX	26 hr
Mar 12, 2:20 PM CDT	Winter Storm Watch	DMX	45 hr
Mar 14, 3:09 AM CDT	High Wind Watch	DMX	8 hr
Mar 14, 11:34 AM CDT	Blizzard Warning	DMX	43 hr
Mar 14, 11:37 AM CDT	High Wind Warning	DMX	40 hr
Mar 16, 5:37 AM CDT	Winter Weather Advisory	DMX	4 hr
Mar 26, 1:42 PM CDT	Fire Weather Watch	DMX	22 hr
Mar 27, 11:52 AM CDT	Red Flag Warning	DMX	33 hr
Mar 30, 8:57 PM CDT	Mesoscale Discussion	SPC	2 hr
Mar 30, 9:21 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Mar 30, 9:53 PM CDT	Severe Thunderstorm Warning	DMX	67 min
Mar 30, 10:48 PM CDT	Severe Thunderstorm Warning	DMX	42 min
Mar 30, 11:29 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 2, 1:43 PM CDT	Tornado Watch	SPC	8 hr
Apr 8, 1:56 AM CDT	Wind Advisory	DMX	16 hr
Apr 14, 12:56 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 14, 2:33 PM CDT	Tornado Watch	SPC	9 hr
Apr 15, 10:22 AM CDT	Mesoscale Discussion	SPC	2 hr
Apr 15, 12:28 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 15, 1:50 PM CDT	Mesoscale Discussion	SPC	85 min
Apr 15, 2:06 PM CDT	Severe Thunderstorm Warning	DMX	39 min
Apr 15, 3:06 PM CDT	Severe Thunderstorm Warning	DMX	39 min
Apr 15, 3:40 PM CDT	Tornado Watch	SPC	6 hr
Apr 15, 3:41 PM CDT	Severe Thunderstorm Warning	DMX	49 min
Apr 15, 4:11 PM CDT	Severe Thunderstorm Warning	DMX	49 min
Apr 15, 8:22 PM CDT	Severe Thunderstorm Warning	DMX	38 min
Apr 15, 8:31 PM CDT	Severe Thunderstorm Warning	DMX	59 min
Apr 15, 9:00 PM CDT	Severe Thunderstorm Warning	DMX	33 min
Apr 17, 12:40 PM CDT	Tornado Watch	SPC	9 hr
Apr 17, 1:57 PM CDT	Severe Thunderstorm Warning	DMX	48 min
Apr 17, 2:29 PM CDT	Severe Thunderstorm Warning	DMX	46 min
Apr 17, 2:33 PM CDT	Tornado Warning	DMX	42 min
Apr 17, 2:44 PM CDT	Severe Thunderstorm Warning	DMX	31 min
Apr 17, 2:49 PM CDT	Mesoscale Discussion	SPC	116 min
Apr 17, 3:07 PM CDT	Severe Thunderstorm Warning	DMX	38 min
Apr 19, 2:13 AM CDT	Freeze Warning	DMX	31 hr
Apr 23, 5:04 PM CDT	Mesoscale Discussion	SPC	116 min
Apr 23, 5:56 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 23, 7:41 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 23, 7:46 PM CDT	Tornado Warning	DMX	32 min
Apr 23, 7:55 PM CDT	Severe Thunderstorm Warning	DMX	50 min
May 1, 2:34 AM CDT	Frost Advisory	DMX	29 hr
May 15, 3:55 PM CDT	Mesoscale Discussion	SPC	2 hr
May 15, 5:16 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
May 15, 7:29 PM CDT	Mesoscale Discussion	SPC	2 hr
May 15, 10:53 PM CDT	Mesoscale Discussion	SPC	2 hr
May 17, 7:40 PM CDT	Mesoscale Discussion	SPC	65 min
May 17, 8:07 PM CDT	Tornado Watch	SPC	5 hr
May 17, 9:30 PM CDT	Mesoscale Discussion	SPC	90 min
May 18, 3:49 PM CDT	Tornado Watch	SPC	6 hr
May 18, 8:08 PM CDT	Severe Thunderstorm Warning	DMX	52 min
May 18, 8:18 PM CDT	Tornado Warning	DMX	16 min
May 18, 8:54 PM CDT	Mesoscale Discussion	SPC	3 hr
Jun 4, 3:54 AM CDT	Flood Watch	DMX	27 hr
Jun 10, 10:30 AM CDT	Special Weather Statement	DMX	30 min
Jun 10, 10:42 AM CDT	Severe Thunderstorm Warning	DMX	48 min
Jun 10, 11:08 AM CDT	Severe Thunderstorm Warning	DMX	52 min
Jun 10, 1:35 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 11, 2:13 AM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 11, 7:44 AM CDT	Severe Thunderstorm Warning	DMX	46 min
Jun 11, 7:55 AM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	50 min
Jun 11, 8:25 AM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	65 min
Jun 17, 2:36 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 17, 3:55 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 17, 4:52 AM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	53 min
Jun 17, 5:32 AM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	43 min
Jun 17, 5:34 AM CDT	Severe Thunderstorm Warning	DMX	41 min
Jun 17, 5:42 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 17, 5:43 AM CDT	Severe Thunderstorm Warning	DMX	47 min
Jun 17, 5:49 AM CDT	Severe Thunderstorm Warning Destructive damage threat	DMX	56 min
Jun 17, 6:08 AM CDT	Severe Thunderstorm Warning	DMX	67 min
Jun 27, 1:18 AM CDT	Extreme Heat Watch	DMX	24 hr
Jun 27, 12:50 PM CDT	Extreme Heat Warning	DMX	6 days
Jun 28, 7:34 AM CDT	Mesoscale Discussion	SPC	116 min
Jun 28, 10:14 AM CDT	Mesoscale Discussion	SPC	2 hr
Jul 1, 2:34 PM CDT	Mesoscale Discussion	SPC	116 min
Jul 2, 12:45 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 2, 1:05 PM CDT	Flood Watch	DMX	42 hr
Jul 2, 1:10 PM CDT	Mesoscale Discussion	SPC	95 min
Jul 2, 3:53 PM CDT	Mesoscale Discussion	SPC	97 min
Jul 2, 4:13 PM CDT	Severe Thunderstorm Warning	DMX	47 min
Jul 2, 4:54 PM CDT	Severe Thunderstorm Warning	DMX	25 min
Jul 2, 4:58 PM CDT	Severe Thunderstorm Warning	DMX	29 min
Jul 2, 5:42 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 2, 6:58 PM CDT	Flash Flood Warning	DMX	6 hr
Jul 2, 10:26 PM CDT	Severe Thunderstorm Warning	DMX	20 min
Jul 4, 12:41 AM CDT	Flash Flood Warning	DMX	6 hr
Jul 4, 2:18 AM CDT	Flash Flood Warning	DMX	4 hr
Jul 4, 6:21 AM CDT	Areal Flood Warning	DMX	9 hr
Jul 8, 2:09 PM CDT	Flood Watch	DMX	13 hr
Jul 8, 6:21 PM CDT	Mesoscale Discussion	SPC	114 min
Jul 8, 9:15 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 19, 12:53 PM CDT	Heat Advisory	DMX	31 hr
Jul 20, 7:55 AM CDT	Mesoscale Discussion	SPC	2 hr
Jul 20, 2:48 PM CDT	Mesoscale Discussion	SPC	117 min
Jul 20, 3:03 PM CDT	Tornado Watch	SPC	7 hr
Jul 20, 3:56 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	64 min
Jul 20, 4:34 PM CDT	Mesoscale Discussion	SPC	116 min
Jul 20, 4:45 PM CDT	Severe Thunderstorm Warning	DMX	60 min
Jul 20, 5:28 PM CDT	Severe Thunderstorm Warning Destructive damage threat	DMX	47 min
Jul 20, 5:48 PM CDT	Severe Thunderstorm Warning	DMX	57 min
Jul 20, 6:09 PM CDT	Severe Thunderstorm Warning	DMX	51 min
Jul 20, 6:12 PM CDT	Severe Thunderstorm Warning	DMX	48 min
Jul 20, 7:35 PM CDT	Flash Flood Warning	DMX	6 hr
Jul 24, 2:27 AM CDT	Extreme Heat Watch	DMX	57 hr
Jul 25, 2:53 AM CDT	Extreme Heat Warning	DMX	67 hr
Jul 25, 4:48 AM CDT	Dense Fog Advisory	DMX	5 hr
Jul 26, 3:54 PM CDT	Mesoscale Discussion	SPC	96 min
Aug 6, 12:43 AM CDT	Dense Fog Advisory	DMX	9 hr
Aug 7, 2:52 AM CDT	Dense Fog Advisory	DMX	6 hr
Aug 7, 1:16 PM CDT	Mesoscale Discussion	SPC	119 min
Aug 7, 1:40 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 7, 4:57 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 11, 4:13 AM CDT	Mesoscale Discussion	SPC	2 hr
Aug 12, 4:37 AM CDT	Mesoscale Discussion	SPC	53 min
Aug 13, 2:53 AM CDT	Flood Watch	DMX	55 hr
Aug 13, 5:47 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 13, 6:27 AM CDT	Severe Thunderstorm Warning	DMX	48 min
Aug 13, 6:44 AM CDT	Tornado Warning	DMX	20 min
Aug 13, 6:48 AM CDT	Tornado Warning Tornado observed	DMX	27 min
Aug 13, 7:11 AM CDT	Severe Thunderstorm Warning	DMX	49 min
Aug 14, 2:20 AM CDT	Mesoscale Discussion	SPC	2 hr
Aug 30, 1:32 PM CDT	Heat Advisory	DMX	6 days
Sep 1, 3:57 AM CDT	Dense Fog Advisory	DMX	4 hr
Sep 8, 2:49 PM CDT	Mesoscale Discussion	SPC	116 min
Sep 8, 5:50 PM CDT	Severe Thunderstorm Warning	DMX	40 min
Sep 13, 8:19 PM CDT	Flood Watch	DMX	3 days
Sep 14, 9:11 PM CDT	Mesoscale Discussion	SPC	64 min
Sep 16, 8:20 PM CDT	Dense Fog Advisory	DMX	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	39
Tornado Warning	5
Severe Thunderstorm Watch	9
Tornado Watch	8
Mesoscale Discussion	38
Special Weather Statement	3
Flooding
Areal Flood Warning	1
Flash Flood Warning	4
Flood Watch	5
Winter
Blizzard Warning	1
Winter Storm Warning	1
Winter Storm Watch	1
Winter Weather Advisory	4
Heat
Extreme Heat Warning	2
Extreme Heat Watch	2
Heat Advisory	2
Cold
Extreme Cold Warning	1
Freeze Warning	1
Extreme Cold Watch	1
Cold Weather Advisory	3
Frost Advisory	1
Wind and dust
High Wind Warning	3
High Wind Watch	2
Wind Advisory	4
Fire
Red Flag Warning	2
Fire Weather Watch	2
Fog and smoke
Dense Fog Advisory	7

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.