Weather alerts in Johnson County, Iowa, 2026

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

Johnson County and its neighbors

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

Alerts: 183
Warnings: 74
Watches: 42
Advisories: 19
Busiest month: June41 alerts
Busiest day: June 11, 202612 alerts

Over time

By month

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 6, 11:58 PM CST	Dense Fog Advisory	DVN	12 hr
Jan 8, 7:18 PM CST	Severe Thunderstorm Warning	DVN	42 min
Jan 17, 1:51 PM CST	Cold Weather Advisory	DVN	46 hr
Jan 21, 2:46 AM CST	Extreme Cold Watch	DVN	31 hr
Jan 21, 2:46 AM CST	Wind Advisory	DVN	21 hr
Jan 21, 11:24 AM CST	High Wind Warning	DVN	10 hr
Jan 22, 2:38 AM CST	Extreme Cold Warning	DVN	33 hr
Jan 22, 10:02 AM CST	Cold Weather Advisory	DVN	50 hr
Jan 25, 1:48 AM CST	Cold Weather Advisory	DVN	34 hr
Feb 17, 2:31 PM CST	Fire Weather Watch	DVN	10 hr
Feb 17, 8:04 PM CST	Wind Advisory	DVN	22 hr
Feb 18, 12:30 AM CST	Red Flag Warning	DVN	18 hr
Feb 19, 2:49 AM CST	Winter Weather Advisory	DVN	30 hr
Mar 4, 8:40 PM CST	Dense Fog Advisory	DVN	12 hr
Mar 6, 8:18 PM CST	Tornado Watch	SPC	6 hr
Mar 6, 9:43 PM CST	Mesoscale Discussion	SPC	2 hr
Mar 10, 4:53 PM CDT	Mesoscale Discussion	SPC	97 min
Mar 10, 5:40 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Mar 10, 6:57 PM CDT	Severe Thunderstorm Warning	DVN	48 min
Mar 10, 6:59 PM CDT	Severe Thunderstorm Warning	DVN	26 min
Mar 10, 7:21 PM CDT	Mesoscale Discussion	SPC	84 min
Mar 12, 2:34 AM CDT	Wind Advisory	DVN	33 hr
Mar 12, 10:37 AM CDT	High Wind Warning	DVN	28 hr
Mar 13, 2:55 AM CDT	Winter Storm Watch	DVN	56 hr
Mar 14, 2:00 AM CDT	High Wind Watch	DVN	11 hr
Mar 14, 12:33 PM CDT	Blizzard Warning	DVN	48 hr
Mar 14, 12:33 PM CDT	High Wind Warning	DVN	41 hr
Mar 15, 9:19 AM CDT	Severe Thunderstorm Warning	DVN	26 min
Mar 15, 1:18 PM CDT	Winter Weather Advisory	DVN	24 hr
Mar 16, 1:05 PM CDT	Winter Weather Advisory	DVN	11 hr
Mar 27, 11:59 AM CDT	Red Flag Warning	DVN	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, 11:29 PM CDT	Mesoscale Discussion	SPC	2 hr
Mar 31, 12:36 AM CDT	Severe Thunderstorm Warning	DVN	22 min
Mar 31, 1:30 AM CDT	Special Weather Statement	DVN	45 min
Mar 31, 1:54 AM CDT	Mesoscale Discussion	SPC	96 min
Mar 31, 2:15 AM CDT	Special Weather Statement	DVN	45 min
Mar 31, 9:30 AM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	45 min
Apr 2, 12:28 PM CDT	Mesoscale Discussion	SPC	3 hr
Apr 2, 1:43 PM CDT	Tornado Watch	SPC	8 hr
Apr 2, 3:41 PM CDT	Mesoscale Discussion	SPC	94 min
Apr 2, 3:56 PM CDT	Tornado Warning	DVN	49 min
Apr 2, 3:59 PM CDT	Severe Thunderstorm Warning	DVN	61 min
Apr 2, 4:26 PM CDT	Mesoscale Discussion	SPC	94 min
Apr 2, 4:27 PM CDT	Tornado Warning Tornado observed	DVN	48 min
Apr 2, 4:56 PM CDT	Severe Thunderstorm Warning	DVN	64 min
Apr 14, 12:56 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 14, 2:33 PM CDT	Tornado Watch	SPC	9 hr
Apr 14, 5:21 PM CDT	Severe Thunderstorm Warning	DVN	24 min
Apr 14, 5:34 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	41 min
Apr 14, 6:06 PM CDT	Severe Thunderstorm Warning	DVN	39 min
Apr 14, 11:36 PM CDT	Mesoscale Discussion	SPC	84 min
Apr 14, 11:38 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 15, 10:22 AM CDT	Mesoscale Discussion	SPC	2 hr
Apr 15, 3:40 PM CDT	Tornado Watch	SPC	6 hr
Apr 15, 6:15 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 15, 7:09 PM CDT	Severe Thunderstorm Warning	DVN	66 min
Apr 15, 9:17 PM CDT	River Flood Warning	DVN	34 hr
Apr 17, 12:40 PM CDT	Tornado Watch	SPC	9 hr
Apr 17, 12:46 PM CDT	Flood Watch	DVN	12 hr
Apr 17, 12:59 PM CDT	Severe Thunderstorm Warning	DVN	61 min
Apr 17, 2:05 PM CDT	Mesoscale Discussion	SPC	55 min
Apr 17, 2:49 PM CDT	Mesoscale Discussion	SPC	116 min
Apr 17, 3:24 PM CDT	Severe Thunderstorm Warning	DVN	66 min
Apr 17, 3:29 PM CDT	Severe Thunderstorm Warning	DVN	76 min
Apr 17, 5:08 PM CDT	Tornado Warning	DVN	52 min
Apr 17, 5:12 PM CDT	Severe Thunderstorm Warning Destructive damage threat	DVN	63 min
Apr 19, 2:10 AM CDT	Freeze Warning	DVN	30 hr
Apr 23, 8:59 PM CDT	Mesoscale Discussion	SPC	91 min
Apr 23, 8:59 PM CDT	Severe Thunderstorm Watch	SPC	3 hr
Apr 23, 9:05 PM CDT	Special Weather Statement	DVN	25 min
Apr 23, 9:13 PM CDT	Severe Thunderstorm Warning	DVN	47 min
Apr 23, 9:36 PM CDT	Severe Thunderstorm Warning	DVN	39 min
Apr 23, 10:15 PM CDT	Severe Thunderstorm Warning	DVN	60 min
Apr 23, 11:13 PM CDT	Severe Thunderstorm Warning	DVN	47 min
Apr 23, 11:16 PM CDT	Tornado Warning	DVN	44 min
May 1, 2:16 AM CDT	Frost Advisory	DVN	30 hr
May 6, 1:17 PM CDT	Frost Advisory	DVN	19 hr
May 15, 10:33 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
May 17, 11:10 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 18, 1:24 AM CDT	Mesoscale Discussion	SPC	96 min
May 18, 9:35 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 5, 8:19 PM CDT	Mesoscale Discussion	SPC	86 min
Jun 5, 9:50 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 5, 11:33 PM CDT	Mesoscale Discussion	SPC	87 min
Jun 7, 11:46 AM CDT	Flood Watch	DVN	31 hr
Jun 8, 12:58 PM CDT	Mesoscale Discussion	SPC	92 min
Jun 10, 7:43 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 10, 10:58 AM CDT	Flood Watch	DVN	32 hr
Jun 10, 11:09 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 10, 11:26 AM CDT	Severe Thunderstorm Warning	DVN	64 min
Jun 10, 11:38 AM CDT	Severe Thunderstorm Warning	DVN	67 min
Jun 10, 4:01 PM CDT	Tornado Watch	SPC	7 hr
Jun 10, 5:30 PM CDT	Severe Thunderstorm Warning	DVN	60 min
Jun 10, 9:15 PM CDT	River Flood Warning	DVN	3 days
Jun 10, 9:15 PM CDT	River Flood Warning	DVN	24 hr
Jun 11, 7:31 AM CDT	Tornado Watch	SPC	7 hr
Jun 11, 8:19 AM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	71 min
Jun 11, 8:31 AM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	74 min
Jun 11, 8:34 AM CDT	Severe Thunderstorm Warning Destructive damage threat	DVN	56 min
Jun 11, 9:08 AM CDT	Tornado Warning	DVN	37 min
Jun 11, 9:18 AM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	52 min
Jun 11, 9:35 AM CDT	Severe Thunderstorm Warning	DVN	37 min
Jun 11, 1:08 PM CDT	Mesoscale Discussion	SPC	3 hr
Jun 11, 1:57 PM CDT	Tornado Watch	SPC	7 hr
Jun 11, 3:07 PM CDT	Mesoscale Discussion	SPC	113 min
Jun 13, 12:59 PM CDT	Severe Thunderstorm Warning	DVN	46 min
Jun 16, 1:36 PM CDT	Flood Watch	DVN	29 hr
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, 5:42 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 17, 5:52 AM CDT	Severe Thunderstorm Warning	DVN	53 min
Jun 17, 6:45 AM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	60 min
Jun 17, 7:08 AM CDT	Severe Thunderstorm Warning Destructive damage threat	DVN	52 min
Jun 17, 7:24 AM CDT	Flash Flood Warning	DVN	6 hr
Jun 17, 7:55 AM CDT	Flash Flood Warning	DVN	5 hr
Jun 17, 8:16 AM CDT	Mesoscale Discussion	SPC	59 min
Jun 17, 10:22 AM CDT	River Flood Warning	DVN	70 hr
Jun 17, 8:58 PM CDT	River Flood Warning	DVN	68 hr
Jun 21, 8:19 PM CDT	River Flood Warning	DVN	24 hr
Jun 27, 1:28 AM CDT	Extreme Heat Watch	DVN	24 hr
Jun 27, 1:24 PM CDT	Extreme Heat Warning	DVN	6 days
Jun 28, 10:14 AM CDT	Mesoscale Discussion	SPC	2 hr
Jul 1, 2:34 PM CDT	Mesoscale Discussion	SPC	116 min
Jul 2, 12:37 PM CDT	Flood Watch	DVN	55 hr
Jul 2, 2:57 PM CDT	River Flood Watch	DVN	7 days
Jul 2, 5:42 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 3, 5:05 PM CDT	Mesoscale Discussion	SPC	115 min
Jul 3, 6:15 PM CDT	Special Weather Statement	DVN	45 min
Jul 3, 6:37 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 4, 4:25 AM CDT	Severe Thunderstorm Warning	DVN	65 min
Jul 10, 2:29 PM CDT	Special Weather Statement	DVN	31 min
Jul 20, 7:55 AM CDT	Mesoscale Discussion	SPC	2 hr
Jul 20, 10:51 AM CDT	Severe Thunderstorm Warning	DVN	54 min
Jul 20, 11:36 AM CDT	Mesoscale Discussion	SPC	114 min
Jul 20, 3:03 PM CDT	Tornado Watch	SPC	7 hr
Jul 20, 4:34 PM CDT	Mesoscale Discussion	SPC	116 min
Jul 20, 5:11 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	79 min
Jul 20, 5:37 PM CDT	Mesoscale Discussion	SPC	53 min
Jul 24, 1:38 AM CDT	Extreme Heat Watch	DVN	59 hr
Jul 25, 2:49 AM CDT	Extreme Heat Warning	DVN	67 hr
Jul 26, 3:54 PM CDT	Mesoscale Discussion	SPC	96 min
Aug 7, 2:53 AM CDT	Dense Fog Advisory	DVN	6 hr
Aug 7, 1:40 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 7, 4:57 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 7, 5:26 PM CDT	Severe Thunderstorm Warning	DVN	36 min
Aug 9, 1:41 AM CDT	Heat Advisory	DVN	18 hr
Aug 11, 4:13 AM CDT	Mesoscale Discussion	SPC	2 hr
Aug 11, 7:22 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 12, 4:37 AM CDT	Severe Thunderstorm Warning	DVN	53 min
Aug 12, 4:37 AM CDT	Mesoscale Discussion	SPC	53 min
Aug 12, 5:25 AM CDT	Severe Thunderstorm Warning	DVN	65 min
Aug 12, 6:19 AM CDT	Flash Flood Warning	DVN	3 hr
Aug 12, 6:41 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 13, 2:22 AM CDT	Flood Watch	DVN	56 hr
Aug 13, 2:35 AM CDT	Dense Fog Advisory	DVN	6 hr
Aug 13, 5:47 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 13, 7:27 AM CDT	Mesoscale Discussion	SPC	2 hr
Aug 13, 11:10 AM CDT	River Flood Watch	DVN	68 hr
Aug 13, 11:14 AM CDT	River Flood Watch	DVN	72 hr
Aug 13, 11:03 PM CDT	Mesoscale Discussion	SPC	117 min
Aug 14, 3:24 PM CDT	River Flood Warning	DVN	3 days
Aug 16, 4:31 AM CDT	Dense Fog Advisory	DVN	4 hr
Aug 30, 1:04 PM CDT	Heat Advisory	DVN	6 days
Sep 2, 2:02 AM CDT	Extreme Heat Warning	DVN	4 days
Sep 8, 2:49 PM CDT	Mesoscale Discussion	SPC	116 min
Sep 8, 7:33 PM CDT	Mesoscale Discussion	SPC	117 min
Sep 8, 8:18 PM CDT	Severe Thunderstorm Warning	DVN	57 min
Sep 8, 8:50 PM CDT	Tornado Warning	DVN	25 min
Sep 8, 9:07 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	46 min
Sep 16, 10:56 AM CDT	River Flood Watch	DVN	12 hr
Sep 16, 12:32 PM CDT	Flood Watch	DVN	20 hr
Sep 16, 9:26 PM CDT	Dense Fog Advisory	DVN	12 hr
Sep 18, 1:23 AM CDT	Flood Watch	DVN	60 hr
Sep 19, 8:54 AM CDT	River Flood Watch	DVN	20 hr
Sep 20, 12:16 AM CDT	Flash Flood Warning	DVN	8 hr
Sep 20, 1:18 AM CDT	Severe Thunderstorm Warning	DVN	57 min
Sep 20, 2:02 AM CDT	Flash Flood Warning	DVN	6 hr
Sep 20, 5:17 AM CDT	River Flood Warning	DVN	4 days
Sep 20, 5:43 AM CDT	River Flood Warning	DVN	4 days
Sep 20, 7:55 AM CDT	Areal Flood Warning	DVN	6 hr
Sep 20, 8:04 AM CDT	Areal Flood Warning	DVN	6 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	41
Tornado Warning	6
Severe Thunderstorm Watch	14
Tornado Watch	9
Mesoscale Discussion	43
Special Weather Statement	5
Flooding
Areal Flood Warning	2
Flash Flood Warning	5
River Flood Warning	9
Flood Watch	8
River Flood Watch	5
Winter
Blizzard Warning	1
Winter Storm Watch	1
Winter Weather Advisory	3
Heat
Extreme Heat Warning	3
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	2
Wind and dust
High Wind Warning	3
High Wind Watch	1
Wind Advisory	3
Fire
Red Flag Warning	2
Fire Weather Watch	1
Fog and smoke
Dense Fog Advisory	6

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. Rebuilt daily.