Weather alerts in Jackson County, Iowa, 2021

112 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Jackson County and its neighbors

Each county as a circle sized by its count in 2021. Tap one for its archive.

Alerts: 112
Warnings: 27
Watches: 12
Advisories: 45
Busiest month: July18 alerts
Busiest day: July 14, 20218 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 2 tornado warnings covering Jackson County in 2021 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 18 minutes after it went out.

Jackson County, 2021

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	2	1	50%	1	100%	18 min
Severe thunderstorm warnings	13	8	38%	6	83%	31 min
Flash flood warnings	0			0

Each office's whole area, 2021

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Quad Cities, IA: tornado warnings	30	13	57%	29	76%	17 min
NWS Quad Cities, IA: severe thunderstorm warnings	122	70	43%	202	83%	23 min
NWS Quad Cities, IA: flash flood warnings	20	10	50%	24	79%	70 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 2, 2:49 PM CST	Dense Fog Advisory	DVN	21 hr
Jan 3, 2:22 PM CST	Dense Fog Advisory	DVN	28 hr
Jan 4, 3:27 PM CST	Special Weather Statement	DVN	2 hr
Jan 5, 3:41 PM CST	Dense Fog Advisory	DVN	18 hr
Jan 6, 2:37 PM CST	Dense Fog Advisory	DVN	13 hr
Jan 13, 2:53 PM CST	Winter Weather Advisory	DVN	44 hr
Jan 16, 8:33 PM CST	Winter Weather Advisory	DVN	15 hr
Jan 19, 4:59 AM CST	Winter Weather Advisory	DVN	5 hr
Jan 19, 5:03 PM CST	Winter Weather Advisory	DVN	4 hr
Jan 23, 3:44 PM CST	Winter Storm Watch	DVN	23 hr
Jan 24, 2:43 PM CST	Winter Storm Warning	DVN	45 hr
Jan 29, 2:11 AM CST	Winter Storm Watch	DVN	12 hr
Jan 29, 2:29 PM CST	Winter Storm Warning	DVN	46 hr
Jan 29, 2:29 PM CST	Winter Weather Advisory	DVN	52 hr
Feb 3, 1:04 AM CST	Dense Fog Advisory	DVN	10 hr
Feb 3, 4:01 AM CST	Winter Storm Watch	DVN	11 hr
Feb 3, 4:01 AM CST	Winter Weather Advisory	DVN	56 hr
Feb 3, 2:56 PM CST	Winter Storm Warning	DVN	36 hr
Feb 6, 12:51 AM CST	Wind Chill Advisory	DVN	9 hr
Feb 6, 3:47 AM CST	Wind Chill Warning	DVN	32 hr
Feb 8, 11:03 AM CST	Winter Weather Advisory	DVN	12 hr
Feb 8, 2:48 PM CST	Wind Chill Advisory	DVN	19 hr
Feb 9, 2:28 AM CST	Wind Chill Warning	DVN	8 hr
Feb 10, 2:30 PM CST	Wind Chill Advisory	DVN	20 hr
Feb 11, 5:07 PM CST	Wind Chill Advisory	DVN	43 hr
Feb 13, 3:37 AM CST	Wind Chill Warning	DVN	56 hr
Feb 15, 12:10 PM CST	Wind Chill Advisory	DVN	22 hr
Feb 20, 2:35 PM CST	Winter Weather Advisory	DVN	30 hr
Feb 26, 1:19 AM CST	Dense Fog Advisory	DVN	4 hr
Feb 28, 6:13 AM CST	Dense Fog Advisory	DVN	6 hr
Mar 10, 2:52 AM CST	Wind Advisory	DVN	17 hr
Mar 14, 3:53 AM CDT	Winter Weather Advisory	DVN	39 hr
Mar 15, 3:32 AM CDT	Winter Storm Warning	DVN	15 hr
Mar 17, 2:28 PM CDT	Wind Advisory	DVN	29 hr
Mar 28, 3:24 AM CDT	Fire Weather Watch	DVN	12 hr
Mar 28, 2:41 PM CDT	Wind Advisory	DVN	29 hr
Mar 28, 2:55 PM CDT	Red Flag Warning	DVN	29 hr
Apr 7, 9:13 PM CDT	Special Weather Statement	DVN	62 min
Apr 19, 3:41 AM CDT	Freeze Watch	DVN	10 hr
Apr 19, 2:07 PM CDT	Freeze Warning	DVN	43 hr
Apr 19, 11:47 PM CDT	Frost Advisory	DVN	8 hr
Apr 21, 3:07 AM CDT	Freeze Warning	DVN	30 hr
Apr 24, 2:25 PM CDT	Frost Advisory	DVN	18 hr
May 1, 3:26 AM CDT	Wind Advisory	DVN	16 hr
May 7, 1:48 PM CDT	Frost Advisory	DVN	18 hr
May 10, 2:28 PM CDT	Frost Advisory	DVN	18 hr
May 11, 2:26 PM CDT	Frost Advisory	DVN	17 hr
May 28, 3:30 AM CDT	Frost Advisory	DVN	28 hr
Jun 20, 4:01 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 20, 7:48 PM CDT	Tornado Warning	DVN	42 min
Jun 20, 8:19 PM CDT	Severe Thunderstorm Warning	DVN	41 min
Jun 20, 8:27 PM CDT	Tornado Warning Tornado observed	DVN	33 min
Jun 20, 8:53 PM CDT	Severe Thunderstorm Warning	DVN	67 min
Jun 25, 6:18 PM CDT	Special Weather Statement	DVN	42 min
Jun 30, 4:22 AM CDT	Dense Fog Advisory	DVN	4 hr
Jul 14, 7:02 AM CDT	Mesoscale Discussion	SPC	2 hr
Jul 14, 11:31 AM CDT	Special Weather Statement	DVN	29 min
Jul 14, 11:40 AM CDT	Severe Thunderstorm Warning	DVN	35 min
Jul 14, 11:45 AM CDT	Mesoscale Discussion	SPC	2 hr
Jul 14, 12:15 PM CDT	Special Weather Statement	DVN	30 min
Jul 14, 12:35 PM CDT	Severe Thunderstorm Warning	DVN	40 min
Jul 14, 5:42 PM CDT	Mesoscale Discussion	SPC	63 min
Jul 14, 6:13 PM CDT	Tornado Watch	SPC	6 hr
Jul 14, 9:15 PM CDT	Mesoscale Discussion	SPC	90 min
Jul 14, 10:41 PM CDT	Severe Thunderstorm Warning	DVN	49 min
Jul 14, 11:10 PM CDT	Severe Thunderstorm Warning	DVN	50 min
Jul 23, 3:18 AM CDT	Heat Advisory	DVN	41 hr
Jul 27, 3:12 AM CDT	Heat Advisory	DVN	64 hr
Jul 28, 12:50 AM CDT	Mesoscale Discussion	SPC	55 min
Jul 28, 2:37 AM CDT	Special Weather Statement	DVN	38 min
Jul 29, 2:35 AM CDT	Special Weather Statement	DVN	55 min
Jul 29, 3:31 AM CDT	Special Weather Statement	DVN	29 min
Jul 29, 4:04 AM CDT	Special Weather Statement	DVN	41 min
Aug 8, 2:24 PM CDT	Heat Advisory	DVN	53 hr
Aug 10, 2:08 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 10, 2:28 PM CDT	Heat Advisory	DVN	29 hr
Aug 10, 4:04 PM CDT	Severe Thunderstorm Warning	DVN	56 min
Aug 10, 4:38 PM CDT	Severe Thunderstorm Warning	DVN	52 min
Aug 10, 5:00 PM CDT	Severe Thunderstorm Warning	DVN	45 min
Aug 10, 5:51 PM CDT	Mesoscale Discussion	SPC	84 min
Aug 11, 3:56 PM CDT	Mesoscale Discussion	SPC	3 hr
Aug 11, 5:11 PM CDT	Severe Thunderstorm Warning	DVN	49 min
Aug 11, 5:40 PM CDT	Mesoscale Discussion	SPC	95 min
Aug 11, 7:35 PM CDT	Mesoscale Discussion	SPC	85 min
Aug 23, 2:45 PM CDT	Heat Advisory	DVN	29 hr
Aug 24, 1:52 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Aug 24, 4:07 PM CDT	Special Weather Statement	DVN	23 min
Aug 24, 4:17 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	58 min
Aug 24, 5:01 PM CDT	Severe Thunderstorm Warning	DVN	59 min
Aug 24, 5:10 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 26, 5:50 PM CDT	Flash Flood Watch	DVN	13 hr
Oct 8, 3:52 AM CDT	Dense Fog Advisory	DVN	5 hr
Oct 8, 9:43 PM CDT	Dense Fog Advisory	DVN	10 hr
Oct 10, 6:07 AM CDT	Special Weather Statement	DVN	38 min
Oct 10, 10:57 PM CDT	Special Weather Statement	DVN	33 min
Oct 13, 9:13 AM CDT	Special Weather Statement	DVN	47 min
Oct 20, 3:17 PM CDT	Special Weather Statement	DVN	28 min
Oct 22, 2:22 PM CDT	Freeze Warning	DVN	19 hr
Nov 11, 7:16 PM CST	Special Weather Statement	DVN	59 min
Nov 14, 2:27 AM CST	Wind Advisory	DVN	7 hr
Nov 27, 8:16 AM CST	Winter Weather Advisory	DVN	2 hr
Dec 5, 3:06 AM CST	Wind Advisory	DVN	33 hr
Dec 13, 2:36 PM CST	High Wind Watch	DVN	24 hr
Dec 14, 2:33 PM CST	High Wind Warning	DVN	39 hr
Dec 15, 4:51 PM CST	Mesoscale Discussion	SPC	114 min
Dec 15, 5:30 PM CST	Tornado Watch	SPC	6 hr
Dec 15, 9:12 PM CST	Severe Thunderstorm Warning Considerable damage threat	DVN	63 min
Dec 27, 12:08 AM CST	Special Weather Statement	DVN	22 min
Dec 27, 2:57 PM CST	Winter Weather Advisory	DVN	27 hr
Dec 28, 8:59 AM CST	Mesoscale Discussion	SPC	5 hr
Dec 30, 7:17 PM CST	Dense Fog Advisory	DVN	23 hr
Dec 31, 11:01 AM CST	Winter Weather Advisory	DVN	10 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	13
Tornado Warning	2
Severe Thunderstorm Watch	3
Tornado Watch	2
Mesoscale Discussion	12
Special Weather Statement	16
Flooding
Flash Flood Watch	1
Winter
Winter Storm Warning	4
Winter Storm Watch	3
Winter Weather Advisory	12
Heat
Heat Advisory	5
Cold
Freeze Warning	3
Wind Chill Warning	3
Freeze Watch	1
Frost Advisory	6
Wind Chill Advisory	5
Wind and dust
High Wind Warning	1
High Wind Watch	1
Wind Advisory	6
Fire
Red Flag Warning	1
Fire Weather Watch	1
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 2020 2022

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.