Alert archive / Iowa / Des Moines County

Weather alerts in Des Moines County, Iowa, 2015

146 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Des Moines County and its neighbors

Each county as a circle sized by its count in 2015. Tap one for its archive.

Alerts: 146
Warnings: 40
Watches: 25
Advisories: 27
Busiest month: June37 alerts
Busiest day: July 16, 20158 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

1 of 1 tornado warnings covering Des Moines County in 2015 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 10 minutes after it went out.

Des Moines County, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	1	0%	1	100%	10 min
Severe thunderstorm warnings	16	10	38%	16	88%	16 min
Flash flood warnings	1	1	0%	1	100%	31 min

Each office's whole area, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Quad Cities, IA: tornado warnings	25	8	68%	42	50%	17 min
NWS Quad Cities, IA: severe thunderstorm warnings	131	86	34%	316	72%	20 min
NWS Quad Cities, IA: flash flood warnings	30	23	23%	60	88%	65 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 4, 3:56 PM CST	Winter Storm Warning	DVN	34 hr
Jan 4, 3:56 PM CST	Winter Weather Advisory	DVN	34 hr
Jan 5, 12:25 PM CST	Mesoscale Discussion	SPC	6 hr
Jan 5, 6:29 PM CST	Mesoscale Discussion	SPC	5 hr
Jan 6, 3:42 AM CST	Wind Chill Warning	DVN	36 hr
Jan 7, 3:21 PM CST	Wind Chill Advisory	DVN	21 hr
Jan 8, 2:03 PM CST	Winter Weather Advisory	DVN	18 hr
Jan 8, 9:04 PM CST	Wind Chill Advisory	DVN	36 hr
Jan 30, 10:38 AM CST	Winter Storm Watch	DVN	17 hr
Jan 31, 3:53 AM CST	Winter Storm Warning	DVN	44 hr
Jan 31, 10:13 PM CST	Mesoscale Discussion	SPC	6 hr
Feb 4, 3:34 AM CST	Winter Weather Advisory	DVN	11 hr
Feb 4, 7:34 AM CST	Mesoscale Discussion	SPC	4 hr
Feb 17, 3:21 AM CST	Wind Chill Advisory	DVN	56 hr
Feb 22, 4:21 AM CST	Wind Chill Advisory	DVN	30 hr
Feb 24, 3:03 PM CST	Winter Weather Advisory	DVN	39 hr
Feb 25, 4:31 AM CST	Winter Storm Warning	DVN	22 hr
Feb 26, 3:14 PM CST	Wind Chill Advisory	DVN	18 hr
Mar 2, 3:12 PM CST	Winter Weather Advisory	DVN	21 hr
Mar 10, 1:42 AM CDT	Dense Fog Advisory	DVN	10 hr
Apr 1, 3:42 AM CDT	Red Flag Warning	DVN	15 hr
Apr 7, 10:48 PM CDT	Severe Thunderstorm Warning	DVN	42 min
Apr 7, 11:55 PM CDT	Severe Thunderstorm Warning	DVN	50 min
Apr 8, 12:18 AM CDT	Severe Thunderstorm Warning	DVN	42 min
Apr 8, 12:39 AM CDT	Severe Thunderstorm Warning	DVN	51 min
Apr 9, 12:29 PM CDT	Mesoscale Discussion	SPC	91 min
Apr 9, 12:58 PM CDT	Tornado Watch	SPC	6 hr
Apr 9, 3:12 PM CDT	Mesoscale Discussion	SPC	93 min
Apr 9, 4:32 PM CDT	Severe Thunderstorm Warning	DVN	43 min
Apr 9, 6:39 PM CDT	Special Weather Statement	DVN	2 hr
Apr 10, 1:09 PM CDT	Wind Advisory	DVN	6 hr
Apr 20, 9:05 AM CDT	Special Weather Statement	DVN	3 hr
Apr 20, 11:49 AM CDT	Special Weather Statement	DVN	3 hr
Apr 20, 2:39 PM CDT	Special Weather Statement	DVN	3 hr
Apr 21, 4:12 AM CDT	Wind Advisory	DVN	15 hr
Apr 22, 3:19 PM CDT	Freeze Warning	DVN	17 hr
May 6, 4:16 PM CDT	Special Weather Statement	DVN	59 min
May 7, 3:24 PM CDT	Special Weather Statement	DVN	36 min
May 7, 3:29 PM CDT	Severe Thunderstorm Warning	DVN	46 min
May 10, 5:17 PM CDT	Mesoscale Discussion	SPC	88 min
May 24, 3:34 PM CDT	Mesoscale Discussion	SPC	56 min
May 24, 5:34 PM CDT	Tornado Watch	SPC	7 hr
May 24, 6:41 PM CDT	Mesoscale Discussion	SPC	94 min
Jun 7, 5:14 AM CDT	Special Weather Statement	DVN	61 min
Jun 7, 6:22 AM CDT	Special Weather Statement	DVN	113 min
Jun 7, 1:52 PM CDT	Mesoscale Discussion	SPC	53 min
Jun 7, 3:33 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 7, 5:56 PM CDT	Severe Thunderstorm Warning	DVN	64 min
Jun 7, 6:21 PM CDT	Mesoscale Discussion	SPC	84 min
Jun 10, 3:51 PM CDT	Mesoscale Discussion	SPC	114 min
Jun 10, 9:55 PM CDT	Severe Thunderstorm Warning	DVN	29 min
Jun 11, 10:56 AM CDT	Flash Flood Watch	DVN	18 hr
Jun 11, 4:35 PM CDT	Special Weather Statement	DVN	40 min
Jun 11, 8:13 PM CDT	Mesoscale Discussion	SPC	92 min
Jun 11, 8:25 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 13, 2:42 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 14, 10:55 AM CDT	River Flood Warning	DVN	8 days
Jun 14, 10:55 AM CDT	River Flood Warning	DVN	8 days
Jun 15, 7:37 AM CDT	Flash Flood Watch	DVN	13 hr
Jun 15, 9:54 PM CDT	River Flood Warning	DVN	6 days
Jun 20, 12:48 PM CDT	Mesoscale Discussion	SPC	117 min
Jun 20, 3:10 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 20, 3:49 PM CDT	Tornado Watch	SPC	7 hr
Jun 20, 6:33 PM CDT	Mesoscale Discussion	SPC	57 min
Jun 20, 6:59 PM CDT	Severe Thunderstorm Warning	DVN	61 min
Jun 20, 7:25 PM CDT	Severe Thunderstorm Warning	DVN	65 min
Jun 20, 10:12 PM CDT	Mesoscale Discussion	SPC	63 min
Jun 22, 1:22 PM CDT	Mesoscale Discussion	SPC	113 min
Jun 22, 3:56 PM CDT	Tornado Watch	SPC	9 hr
Jun 22, 6:08 PM CDT	Mesoscale Discussion	SPC	67 min
Jun 22, 8:16 PM CDT	Mesoscale Discussion	SPC	59 min
Jun 23, 3:39 PM CDT	Flash Flood Watch	DVN	42 hr
Jun 24, 8:19 PM CDT	River Flood Warning	DVN	6 days
Jun 24, 9:26 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 24, 9:43 PM CDT	River Flood Warning	DVN	6 days
Jun 24, 9:43 PM CDT	River Flood Warning	DVN	8 days
Jun 24, 9:43 PM CDT	River Flood Warning	DVN	8 days
Jun 24, 11:23 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 28, 3:03 PM CDT	Tornado Watch	SPC	8 hr
Jun 29, 4:31 AM CDT	Dense Fog Advisory	DVN	4 hr
Jul 11, 11:24 AM CDT	Flash Flood Warning	DVN	6 hr
Jul 11, 2:15 PM CDT	Flash Flood Watch	DVN	11 hr
Jul 11, 4:42 PM CDT	River Flood Warning	DVN	66 hr
Jul 12, 3:31 AM CDT	Heat Advisory	DVN	35 hr
Jul 13, 2:20 PM CDT	Excessive Heat Warning	DVN	6 hr
Jul 13, 4:01 PM CDT	Tornado Watch	SPC	7 hr
Jul 13, 6:59 PM CDT	Mesoscale Discussion	SPC	91 min
Jul 16, 3:54 AM CDT	Flash Flood Watch	DVN	21 hr
Jul 16, 6:47 AM CDT	Special Weather Statement	DVN	88 min
Jul 16, 3:41 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 16, 4:55 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 16, 5:32 PM CDT	Severe Thunderstorm Warning	DVN	43 min
Jul 16, 5:34 PM CDT	Severe Thunderstorm Warning	DVN	41 min
Jul 16, 5:45 PM CDT	Tornado Warning	DVN	45 min
Jul 16, 6:17 PM CDT	Severe Thunderstorm Warning	DVN	43 min
Jul 16, 7:58 PM CDT	Mesoscale Discussion	SPC	92 min
Jul 17, 1:52 AM CDT	Special Weather Statement	DVN	38 min
Jul 17, 1:53 AM CDT	Special Weather Statement	DVN	37 min
Jul 17, 3:16 AM CDT	Heat Advisory	DVN	33 hr
Jul 18, 12:31 PM CDT	Mesoscale Discussion	SPC	119 min
Jul 25, 3:02 AM CDT	Heat Advisory	DVN	9 hr
Jul 27, 9:13 PM CDT	Heat Advisory	DVN	22 hr
Jul 28, 3:24 PM CDT	Flash Flood Watch	DVN	12 hr
Jul 28, 5:46 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 28, 7:45 PM CDT	Special Weather Statement	DVN	75 min
Jul 28, 7:47 PM CDT	Special Weather Statement	DVN	73 min
Jul 28, 8:04 PM CDT	Mesoscale Discussion	SPC	116 min
Jul 28, 10:46 PM CDT	Mesoscale Discussion	SPC	89 min
Aug 2, 8:30 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Aug 9, 6:04 AM CDT	Special Weather Statement	DVN	56 min
Aug 10, 5:03 AM CDT	Dense Fog Advisory	DVN	3 hr
Aug 18, 12:49 PM CDT	Mesoscale Discussion	SPC	116 min
Aug 18, 1:35 PM CDT	Tornado Watch	SPC	8 hr
Aug 18, 3:34 PM CDT	Special Weather Statement	DVN	41 min
Aug 18, 3:53 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 30, 12:40 AM CDT	Dense Fog Advisory	DVN	10 hr
Aug 30, 7:14 PM CDT	Dense Fog Advisory	DVN	11 hr
Sep 7, 3:24 AM CDT	Flash Flood Watch	DVN	28 hr
Sep 10, 8:22 PM CDT	Mesoscale Discussion	SPC	113 min
Sep 17, 7:54 PM CDT	Mesoscale Discussion	SPC	66 min
Sep 18, 5:20 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 18, 8:02 PM CDT	Special Weather Statement	DVN	58 min
Oct 15, 3:08 PM CDT	Freeze Watch	DVN	13 hr
Oct 16, 3:45 AM CDT	Freeze Warning	DVN	29 hr
Oct 18, 2:15 PM CDT	Red Flag Warning	DVN	29 hr
Nov 3, 1:31 AM CST	Dense Fog Advisory	DVN	8 hr
Nov 3, 7:31 PM CST	Dense Fog Advisory	DVN	10 hr
Nov 5, 9:19 PM CST	Special Weather Statement	DVN	56 min
Nov 10, 3:33 PM CST	Wind Advisory	DVN	50 hr
Nov 11, 2:24 PM CST	Mesoscale Discussion	SPC	2 hr
Nov 11, 3:20 PM CST	Tornado Watch	SPC	6 hr
Nov 11, 4:52 PM CST	Severe Thunderstorm Warning	DVN	53 min
Nov 11, 5:28 PM CST	Severe Thunderstorm Warning	DVN	62 min
Nov 19, 3:32 PM CST	Winter Weather Advisory	DVN	44 hr
Dec 6, 9:33 PM CST	Dense Fog Advisory	DVN	17 hr
Dec 11, 9:53 PM CST	Dense Fog Advisory	DVN	14 hr
Dec 15, 11:05 AM CST	River Flood Warning	DVN	15 days
Dec 15, 11:05 AM CST	River Flood Warning	DVN	17 days
Dec 15, 11:05 AM CST	River Flood Warning	DVN	17 days
Dec 21, 10:21 AM CST	River Flood Warning	DVN	3 days
Dec 23, 12:42 PM CST	Mesoscale Discussion	SPC	2 hr
Dec 23, 1:55 PM CST	Tornado Watch	SPC	4 hr
Dec 23, 3:24 PM CST	Mesoscale Discussion	SPC	96 min
Dec 23, 3:35 PM CST	Severe Thunderstorm Warning	DVN	40 min
Dec 26, 3:57 PM CST	Winter Storm Watch	DVN	24 hr
Dec 27, 4:03 PM CST	Winter Storm Warning	DVN	38 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	16
Tornado Warning	1
Severe Thunderstorm Watch	6
Tornado Watch	9
Mesoscale Discussion	36
Special Weather Statement	18
Flooding
Flash Flood Warning	1
River Flood Warning	12
Flash Flood Watch	7
Winter
Winter Storm Warning	4
Winter Storm Watch	2
Winter Weather Advisory	6
Heat
Excessive Heat Warning	1
Heat Advisory	4
Cold
Freeze Warning	2
Wind Chill Warning	1
Freeze Watch	1
Wind Chill Advisory	5
Wind and dust
Wind Advisory	3
Fire
Red Flag Warning	2
Fog and smoke
Dense Fog Advisory	9

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2014 2016

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.