Weather alerts in Hamilton County, Iowa, 2024

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

Hamilton County and its neighbors

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

Alerts: 128
Warnings: 38
Watches: 23
Advisories: 44
Busiest month: May26 alerts
Busiest day: May 21, 202410 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 2 tornado warnings covering Hamilton County in 2024 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.

Hamilton County, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	2	0	100%	1	0%
Severe thunderstorm warnings	17	12	29%	7	86%	24 min
Flash flood warnings	1	0	100%	0

Each office's whole area, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Des Moines, IA: tornado warnings	89	27	70%	61	79%	21 min
NWS Des Moines, IA: severe thunderstorm warnings	321	161	50%	417	78%	25 min
NWS Des Moines, IA: flash flood warnings	25	9	64%	39	69%	168 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 7, 2:06 PM CST	Winter Storm Warning	DMX	55 hr
Jan 10, 3:12 PM CST	Winter Storm Watch	DMX	12 hr
Jan 11, 3:28 AM CST	Winter Storm Warning	DMX	31 hr
Jan 11, 3:03 PM CST	Blizzard Warning	DMX	57 hr
Jan 11, 3:03 PM CST	Wind Chill Watch	DMX	24 hr
Jan 12, 2:29 PM CST	Mesoscale Discussion	SPC	4 hr
Jan 12, 3:32 PM CST	Wind Chill Warning	DMX	4 days
Jan 15, 2:39 PM CST	Wind Chill Advisory	DMX	39 hr
Jan 17, 2:41 PM CST	Wind Chill Advisory	DMX	45 hr
Jan 17, 2:41 PM CST	Winter Weather Advisory	DMX	39 hr
Jan 19, 3:29 AM CST	Wind Chill Advisory	DMX	33 hr
Jan 20, 3:15 AM CST	Wind Chill Advisory	DMX	30 hr
Jan 23, 9:35 AM CST	Dense Fog Advisory	DMX	2 hr
Jan 23, 6:01 PM CST	Dense Fog Advisory	DMX	15 hr
Jan 24, 3:58 PM CST	Dense Fog Advisory	DMX	20 hr
Jan 25, 2:29 PM CST	Dense Fog Advisory	DMX	17 hr
Jan 27, 1:32 PM CST	Dense Fog Advisory	DMX	25 hr
Jan 28, 2:05 PM CST	Dense Fog Advisory	DMX	19 hr
Jan 30, 10:40 PM CST	Dense Fog Advisory	DMX	11 hr
Jan 31, 2:39 PM CST	Dense Fog Advisory	DMX	21 hr
Feb 8, 2:40 AM CST	Wind Advisory	DMX	15 hr
Feb 25, 1:51 PM CST	Red Flag Warning	DMX	28 hr
Feb 27, 3:00 AM CST	Wind Advisory	DMX	24 hr
Feb 28, 2:17 PM CST	Red Flag Warning	DMX	28 hr
Mar 2, 2:41 PM CST	Red Flag Warning	DMX	27 hr
Mar 3, 8:08 AM CST	Wind Advisory	DMX	10 hr
Mar 22, 6:11 AM CDT	Mesoscale Discussion	SPC	4 hr
Mar 23, 2:09 PM CDT	Winter Weather Advisory	DMX	26 hr
Apr 2, 2:47 PM CDT	Wind Advisory	DMX	29 hr
Apr 5, 2:25 PM CDT	Wind Advisory	DMX	35 hr
Apr 7, 2:05 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 15, 2:54 PM CDT	Wind Advisory	DMX	28 hr
Apr 16, 10:22 AM CDT	Tornado Watch	SPC	8 hr
Apr 16, 11:41 AM CDT	Severe Thunderstorm Warning	DMX	64 min
Apr 16, 3:36 PM CDT	Mesoscale Discussion	SPC	54 min
Apr 18, 2:42 PM CDT	Freeze Warning	DMX	17 hr
Apr 19, 2:23 PM CDT	Freeze Warning	DMX	18 hr
Apr 20, 1:47 PM CDT	Freeze Warning	DMX	18 hr
Apr 22, 2:42 AM CDT	Wind Advisory	DMX	14 hr
Apr 26, 1:04 PM CDT	Mesoscale Discussion	SPC	86 min
Apr 30, 1:33 PM CDT	Tornado Watch	SPC	8 hr
Apr 30, 2:29 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 30, 6:24 PM CDT	Severe Thunderstorm Warning	DMX	51 min
May 3, 4:10 AM CDT	Dense Fog Advisory	DMX	5 hr
May 6, 7:32 PM CDT	Tornado Watch	SPC	7 hr
May 8, 6:13 PM CDT	Severe Thunderstorm Warning	DMX	47 min
May 8, 6:55 PM CDT	Severe Thunderstorm Warning	DMX	50 min
May 8, 7:36 PM CDT	Severe Thunderstorm Warning	DMX	54 min
May 9, 11:00 AM CDT	River Flood Watch	DMX	10 hr
May 9, 8:45 PM CDT	River Flood Warning	DMX	46 hr
May 20, 1:50 PM CDT	Flood Watch	DMX	29 hr
May 21, 6:15 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 21, 11:14 AM CDT	River Flood Watch	DMX	47 hr
May 21, 12:32 PM CDT	Mesoscale Discussion	SPC	118 min
May 21, 1:14 PM CDT	Tornado Watch PDS	SPC	8 hr
May 21, 3:31 PM CDT	Severe Thunderstorm Warning Destructive damage threat	DMX	44 min
May 21, 4:01 PM CDT	Severe Thunderstorm Warning	DMX	44 min
May 21, 4:03 PM CDT	Tornado Warning	DMX	42 min
May 21, 4:25 PM CDT	Severe Thunderstorm Warning	DMX	50 min
May 21, 4:46 PM CDT	Tornado Warning	DMX	17 min
May 21, 5:03 PM CDT	Mesoscale Discussion	SPC	87 min
May 23, 10:01 AM CDT	River Flood Warning	DMX	3 days
May 24, 2:25 AM CDT	Flood Watch	DMX	14 hr
May 24, 2:44 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 24, 3:54 AM CDT	Mesoscale Discussion	SPC	2 hr
May 24, 4:40 AM CDT	Severe Thunderstorm Warning	DMX	50 min
May 24, 5:17 AM CDT	Mesoscale Discussion	SPC	118 min
May 24, 5:18 AM CDT	Severe Thunderstorm Warning	DMX	57 min
May 27, 1:10 PM CDT	Mesoscale Discussion	SPC	95 min
Jun 4, 5:26 PM CDT	Mesoscale Discussion	SPC	94 min
Jun 4, 5:41 PM CDT	Severe Thunderstorm Warning	DMX	49 min
Jun 6, 10:46 AM CDT	Wind Advisory	DMX	7 hr
Jun 12, 2:34 PM CDT	Mesoscale Discussion	SPC	116 min
Jun 15, 7:28 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 15, 9:34 PM CDT	Mesoscale Discussion	SPC	86 min
Jun 16, 1:47 AM CDT	Mesoscale Discussion	SPC	88 min
Jun 18, 1:47 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 20, 2:34 PM CDT	Flood Watch	DMX	52 hr
Jun 20, 10:09 PM CDT	River Flood Watch	DMX	21 days
Jun 22, 11:42 AM CDT	River Flood Warning	DMX	21 days
Jun 22, 12:56 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 23, 2:36 AM CDT	Heat Advisory	DMX	41 hr
Jul 1, 1:18 PM CDT	Flood Watch	DMX	22 hr
Jul 2, 2:08 AM CDT	Flood Watch	DMX	17 hr
Jul 6, 6:46 PM CDT	Severe Thunderstorm Warning	DMX	44 min
Jul 6, 7:27 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DMX	48 min
Jul 6, 8:12 PM CDT	Severe Thunderstorm Warning	DMX	48 min
Jul 8, 9:25 PM CDT	River Flood Warning	DMX	49 hr
Jul 14, 3:15 PM CDT	Mesoscale Discussion	SPC	90 min
Jul 15, 1:59 PM CDT	Mesoscale Discussion	SPC	3 hr
Jul 15, 3:18 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 15, 3:28 PM CDT	Severe Thunderstorm Warning	DMX	47 min
Jul 15, 4:26 PM CDT	Flash Flood Warning	DMX	4 hr
Jul 23, 12:56 PM CDT	Mesoscale Discussion	SPC	94 min
Jul 28, 7:35 PM CDT	Severe Thunderstorm Warning	DMX	40 min
Jul 29, 2:35 PM CDT	Heat Advisory	DMX	25 hr
Jul 29, 11:56 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 30, 1:43 AM CDT	Severe Thunderstorm Warning	DMX	47 min
Jul 30, 3:27 PM CDT	Flood Watch	DMX	16 hr
Jul 30, 11:54 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 23, 1:55 PM CDT	Heat Advisory	DMX	54 hr
Aug 25, 2:19 AM CDT	Heat Advisory	DMX	34 hr
Aug 26, 12:18 PM CDT	Excessive Heat Warning	DMX	8 hr
Aug 29, 3:17 PM CDT	Mesoscale Discussion	SPC	88 min
Sep 19, 5:55 PM CDT	Special Weather Statement	DMX	35 min
Oct 13, 3:08 AM CDT	Frost Advisory	DMX	30 hr
Oct 14, 2:57 AM CDT	Frost Advisory	DMX	29 hr
Oct 14, 2:57 AM CDT	Freeze Watch	DMX	12 hr
Oct 14, 2:52 PM CDT	Freeze Warning	DMX	42 hr
Oct 14, 5:48 PM CDT	Freeze Warning	DMX	14 hr
Oct 16, 3:03 PM CDT	Red Flag Warning	DMX	28 hr
Oct 24, 5:22 PM CDT	Mesoscale Discussion	SPC	2 hr
Oct 28, 2:56 PM CDT	Wind Advisory	DMX	39 hr
Oct 30, 1:05 PM CDT	Mesoscale Discussion	SPC	115 min
Nov 3, 7:29 PM CST	Dense Fog Advisory	DMX	9 hr
Nov 5, 11:52 PM CST	Dense Fog Advisory	DMX	10 hr
Nov 14, 9:10 PM CST	Dense Fog Advisory	DMX	14 hr
Nov 20, 2:29 AM CST	Wind Advisory	DMX	16 hr
Dec 3, 1:14 PM CST	Wind Advisory	DMX	35 hr
Dec 12, 2:32 PM CST	Winter Weather Advisory	DMX	51 hr
Dec 14, 7:56 PM CST	Dense Fog Advisory	DMX	15 hr
Dec 15, 2:51 PM CST	Dense Fog Advisory	DMX	20 hr
Dec 19, 2:35 AM CST	Wind Advisory	DMX	19 hr
Dec 25, 1:37 PM CST	Dense Fog Advisory	DMX	22 hr
Dec 26, 1:34 PM CST	Dense Fog Advisory	DMX	22 hr
Dec 28, 1:21 AM CST	Dense Fog Advisory	DMX	11 hr
Dec 28, 6:03 PM CST	Dense Fog Advisory	DMX	18 hr
Dec 29, 6:36 PM CST	Dense Fog Advisory	DMX	17 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	17
Tornado Warning	2
Severe Thunderstorm Watch	7
Tornado Watch	4
Mesoscale Discussion	22
Special Weather Statement	1
Flooding
Flash Flood Warning	1
River Flood Warning	4
Flood Watch	6
River Flood Watch	3
Winter
Blizzard Warning	1
Winter Storm Warning	2
Winter Storm Watch	1
Winter Weather Advisory	3
Heat
Excessive Heat Warning	1
Heat Advisory	4
Cold
Freeze Warning	5
Wind Chill Warning	1
Freeze Watch	1
Wind Chill Watch	1
Frost Advisory	2
Wind Chill Advisory	4
Wind and dust
Wind Advisory	12
Fire
Red Flag Warning	4
Fog and smoke
Dense Fog Advisory	19

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.