Weather alerts in Delaware County, Iowa, 2024

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

Delaware County and its neighbors

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

Alerts: 157
Warnings: 53
Watches: 22
Advisories: 41
Busiest month: May31 alerts
Busiest day: May 21, 202411 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 8 tornado warnings covering Delaware County in 2024 had a tornado report inside them.

Delaware County, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	8	0	100%	0
Severe thunderstorm warnings	27	18	33%	4	75%	24 min
Flash flood warnings	3	1	67%	0

Each office's whole area, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Quad Cities, IA: tornado warnings	66	18	73%	57	72%	17 min
NWS Quad Cities, IA: severe thunderstorm warnings	364	205	44%	646	82%	25 min
NWS Quad Cities, IA: flash flood warnings	30	9	70%	23	83%	59 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, 2:44 AM CST	Winter Storm Watch	DVN	24 hr
Jan 8, 2:43 AM CST	Winter Storm Warning	DVN	48 hr
Jan 9, 9:12 AM CST	Mesoscale Discussion	SPC	3 hr
Jan 9, 1:09 PM CST	Mesoscale Discussion	SPC	3 hr
Jan 10, 3:00 PM CST	Winter Storm Watch	DVN	11 hr
Jan 11, 2:14 AM CST	Winter Storm Warning	DVN	39 hr
Jan 11, 2:14 AM CST	Winter Weather Advisory	DVN	3 days
Jan 11, 3:03 PM CST	Blizzard Warning	DVN	36 hr
Jan 11, 3:03 PM CST	Wind Chill Watch	DVN	47 hr
Jan 11, 9:37 PM CST	Winter Storm Warning	DVN	30 hr
Jan 12, 10:24 AM CST	Mesoscale Discussion	SPC	4 hr
Jan 12, 2:29 PM CST	Mesoscale Discussion	SPC	4 hr
Jan 13, 3:19 AM CST	Wind Chill Warning	DVN	3 days
Jan 15, 2:02 PM CST	Wind Chill Advisory	DVN	43 hr
Jan 18, 2:37 AM CST	Wind Chill Advisory	DVN	33 hr
Jan 18, 2:37 AM CST	Winter Weather Advisory	DVN	27 hr
Jan 19, 2:16 AM CST	Wind Chill Advisory	DVN	34 hr
Jan 20, 2:01 AM CST	Wind Chill Advisory	DVN	33 hr
Jan 21, 2:29 AM CST	Winter Weather Advisory	DVN	60 hr
Jan 23, 1:29 PM CST	Dense Fog Advisory	DVN	20 hr
Jan 24, 3:57 PM CST	Dense Fog Advisory	DVN	44 hr
Jan 26, 1:30 PM CST	Dense Fog Advisory	DVN	26 hr
Jan 28, 1:49 PM CST	Dense Fog Advisory	DVN	22 hr
Jan 31, 2:08 PM CST	Dense Fog Advisory	DVN	12 hr
Feb 8, 2:25 AM CST	Wind Advisory	DVN	16 hr
Feb 25, 1:27 PM CST	Red Flag Warning	DVN	29 hr
Feb 27, 1:58 AM CST	Wind Advisory	DVN	28 hr
Mar 2, 1:41 PM CST	Red Flag Warning	DVN	28 hr
Mar 3, 8:19 AM CST	Wind Advisory	DVN	10 hr
Mar 21, 2:31 AM CDT	Winter Weather Advisory	DVN	34 hr
Mar 22, 6:11 AM CDT	Mesoscale Discussion	SPC	4 hr
Mar 29, 10:01 PM CDT	Special Weather Statement	DVN	44 min
Mar 29, 10:48 PM CDT	Severe Thunderstorm Warning	DVN	42 min
Mar 29, 11:25 PM CDT	Severe Thunderstorm Warning	DVN	38 min
Apr 2, 1:13 PM CDT	Winter Weather Advisory	DVN	24 hr
Apr 2, 2:24 PM CDT	Wind Advisory	DVN	30 hr
Apr 7, 1:52 AM CDT	Wind Advisory	DVN	13 hr
Apr 16, 12:06 PM CDT	Tornado Watch	SPC	10 hr
Apr 16, 1:56 PM CDT	Mesoscale Discussion	SPC	64 min
Apr 16, 2:34 PM CDT	Severe Thunderstorm Warning	DVN	41 min
Apr 16, 3:13 PM CDT	Tornado Warning	DVN	32 min
Apr 16, 3:15 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	45 min
Apr 16, 3:20 PM CDT	Tornado Warning	DVN	25 min
Apr 16, 4:23 PM CDT	Severe Thunderstorm Warning	DVN	52 min
Apr 16, 5:02 PM CDT	Severe Thunderstorm Warning	DVN	43 min
Apr 18, 2:13 PM CDT	Frost Advisory	DVN	18 hr
Apr 19, 1:39 PM CDT	Freeze Warning	DVN	18 hr
Apr 20, 1:43 PM CDT	Freeze Warning	DVN	18 hr
Apr 21, 2:15 PM CDT	Frost Advisory	DVN	18 hr
Apr 27, 4:35 PM CDT	Severe Thunderstorm Warning	DVN	40 min
Apr 27, 5:17 PM CDT	Mesoscale Discussion	SPC	58 min
Apr 27, 5:58 PM CDT	Tornado Watch	SPC	6 hr
Apr 27, 6:18 PM CDT	Severe Thunderstorm Warning	DVN	42 min
May 2, 11:24 AM CDT	Special Weather Statement	DVN	36 min
May 4, 9:06 AM CDT	Special Weather Statement	DVN	54 min
May 7, 4:30 PM CDT	Severe Thunderstorm Warning	DVN	60 min
May 7, 5:24 PM CDT	Mesoscale Discussion	SPC	96 min
May 7, 8:33 PM CDT	Special Weather Statement	DVN	57 min
May 12, 7:37 PM CDT	Special Weather Statement	DVN	38 min
May 21, 1:45 AM CDT	Flood Watch	DVN	19 hr
May 21, 6:15 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 21, 9:29 AM CDT	Mesoscale Discussion	SPC	91 min
May 21, 10:54 AM CDT	Special Weather Statement	DVN	51 min
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, 2:52 PM CDT	Severe Thunderstorm Warning	DVN	43 min
May 21, 5:09 PM CDT	Mesoscale Discussion	SPC	96 min
May 21, 5:54 PM CDT	Severe Thunderstorm Warning	DVN	51 min
May 21, 6:24 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	51 min
May 21, 6:52 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	38 min
May 21, 7:11 PM CDT	Severe Thunderstorm Warning	DVN	49 min
May 21, 7:30 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	45 min
May 24, 2:38 AM CDT	Flood Watch	DVN	13 hr
May 24, 2:44 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 24, 5:17 AM CDT	Mesoscale Discussion	SPC	118 min
May 24, 6:45 AM CDT	Severe Thunderstorm Warning	DVN	60 min
May 24, 7:08 AM CDT	Tornado Warning	DVN	52 min
May 24, 7:39 AM CDT	Severe Thunderstorm Warning	DVN	66 min
May 24, 12:45 PM CDT	Severe Thunderstorm Warning	DVN	32 min
May 27, 1:10 PM CDT	Mesoscale Discussion	SPC	95 min
May 27, 4:04 PM CDT	Severe Thunderstorm Warning	DVN	41 min
May 27, 4:41 PM CDT	Severe Thunderstorm Warning	DVN	49 min
May 27, 5:10 PM CDT	Mesoscale Discussion	SPC	2 hr
May 28, 1:02 PM CDT	Mesoscale Discussion	SPC	3 hr
Jun 1, 11:32 PM CDT	Dense Fog Advisory	DVN	9 hr
Jun 3, 12:51 PM CDT	Special Weather Statement	DVN	39 min
Jun 3, 2:15 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 3, 2:33 PM CDT	Severe Thunderstorm Warning	DVN	42 min
Jun 3, 3:18 PM CDT	Flash Flood Warning	DVN	4 hr
Jun 6, 10:50 AM CDT	Wind Advisory	DVN	7 hr
Jun 17, 2:04 AM CDT	Heat Advisory	DVN	42 hr
Jun 18, 10:19 PM CDT	Severe Thunderstorm Warning	DVN	41 min
Jun 18, 11:10 PM CDT	Special Weather Statement	DVN	50 min
Jun 21, 8:39 PM CDT	Flood Watch	DVN	25 hr
Jun 22, 12:56 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 22, 3:13 PM CDT	Tornado Watch	SPC	6 hr
Jun 22, 3:53 PM CDT	Tornado Warning	DVN	29 min
Jun 22, 5:22 PM CDT	Tornado Warning	DVN	53 min
Jun 22, 5:25 PM CDT	Mesoscale Discussion	SPC	95 min
Jun 22, 6:03 PM CDT	Tornado Warning	DVN	57 min
Jun 22, 7:36 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 1, 11:59 AM CDT	River Flood Watch	DVN	23 hr
Jul 2, 2:04 AM CDT	Flood Watch	DVN	23 hr
Jul 2, 11:26 AM CDT	River Flood Warning	DVN	21 hr
Jul 2, 6:24 PM CDT	Tornado Warning	DVN	51 min
Jul 2, 6:26 PM CDT	Severe Thunderstorm Warning	DVN	49 min
Jul 2, 7:11 PM CDT	Flash Flood Warning	DVN	3 hr
Jul 4, 9:25 PM CDT	Special Weather Statement	DVN	50 min
Jul 10, 2:13 PM CDT	Special Weather Statement	DVN	62 min
Jul 13, 7:33 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jul 13, 9:41 PM CDT	Special Weather Statement	DVN	49 min
Jul 13, 10:00 PM CDT	Mesoscale Discussion	SPC	60 min
Jul 14, 2:20 AM CDT	Heat Advisory	DVN	19 hr
Jul 14, 3:15 PM CDT	Mesoscale Discussion	SPC	90 min
Jul 14, 5:55 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 14, 7:51 PM CDT	Mesoscale Discussion	SPC	84 min
Jul 15, 2:33 AM CDT	Heat Advisory	DVN	17 hr
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, 4:36 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	54 min
Jul 15, 5:20 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	70 min
Jul 15, 5:22 PM CDT	Tornado Warning Tornado observed	DVN	38 min
Jul 15, 5:26 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 15, 5:44 PM CDT	Severe Thunderstorm Warning Destructive damage threat	DVN	61 min
Jul 15, 5:54 PM CDT	Severe Thunderstorm Warning Destructive damage threat	DVN	66 min
Jul 15, 6:15 PM CDT	Flash Flood Warning	DVN	2 hr
Jul 23, 12:56 PM CDT	Mesoscale Discussion	SPC	94 min
Jul 23, 2:49 PM CDT	Special Weather Statement	DVN	71 min
Jul 31, 10:40 PM CDT	Special Weather Statement	DVN	50 min
Aug 5, 11:02 AM CDT	Heat Advisory	DVN	9 hr
Aug 5, 5:09 PM CDT	Mesoscale Discussion	SPC	66 min
Aug 5, 5:24 PM CDT	Tornado Watch	SPC	7 hr
Aug 5, 9:40 PM CDT	Mesoscale Discussion	SPC	65 min
Aug 24, 2:08 PM CDT	Heat Advisory	DVN	30 hr
Aug 25, 2:11 AM CDT	Excessive Heat Watch	DVN	37 hr
Aug 25, 2:11 AM CDT	Excessive Heat Warning	DVN	66 hr
Oct 14, 2:51 AM CDT	Frost Advisory	DVN	29 hr
Oct 14, 2:51 AM CDT	Freeze Watch	DVN	11 hr
Oct 14, 2:07 PM CDT	Freeze Warning	DVN	43 hr
Oct 16, 2:28 PM CDT	Fire Weather Watch	DVN	12 hr
Oct 17, 2:36 AM CDT	Red Flag Warning	DVN	16 hr
Oct 24, 5:22 PM CDT	Mesoscale Discussion	SPC	2 hr
Oct 29, 2:21 AM CDT	Wind Advisory	DVN	19 hr
Oct 29, 10:12 AM CDT	Red Flag Warning	DVN	8 hr
Nov 7, 6:37 AM CST	Dense Fog Advisory	DVN	3 hr
Nov 14, 9:03 PM CST	Dense Fog Advisory	DVN	12 hr
Nov 18, 8:10 PM CST	Wind Advisory	DVN	10 hr
Nov 21, 1:55 AM CST	Wind Advisory	DVN	18 hr
Dec 4, 2:28 AM CST	Wind Advisory	DVN	22 hr
Dec 12, 2:39 PM CST	Winter Weather Advisory	DVN	51 hr
Dec 13, 2:48 AM CST	Ice Storm Warning	DVN	39 hr
Dec 14, 4:58 AM CST	Mesoscale Discussion	SPC	6 hr
Dec 14, 9:31 PM CST	Dense Fog Advisory	DVN	14 hr
Dec 15, 2:35 PM CST	Dense Fog Advisory	DVN	21 hr
Dec 25, 1:27 PM CST	Dense Fog Advisory	DVN	42 hr
Dec 28, 8:19 PM CST	Dense Fog Advisory	DVN	16 hr
Dec 29, 6:58 PM CST	Dense Fog Advisory	DVN	19 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	27
Tornado Warning	8
Severe Thunderstorm Watch	6
Tornado Watch	5
Mesoscale Discussion	28
Special Weather Statement	13
Flooding
Flash Flood Warning	3
River Flood Warning	1
Flood Watch	4
River Flood Watch	1
Winter
Blizzard Warning	1
Ice Storm Warning	1
Winter Storm Warning	3
Winter Storm Watch	2
Winter Weather Advisory	6
Heat
Excessive Heat Warning	1
Excessive Heat Watch	1
Heat Advisory	5
Cold
Freeze Warning	3
Wind Chill Warning	1
Freeze Watch	1
Wind Chill Watch	1
Frost Advisory	3
Wind Chill Advisory	4
Wind and dust
Wind Advisory	10
Fire
Red Flag Warning	4
Fire Weather Watch	1
Fog and smoke
Dense Fog Advisory	13

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.