Alert archive / Illinois / DeKalb County

Weather alerts in DeKalb County, Illinois, 2026

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

DeKalb County and its neighbors

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

Alerts: 161
Warnings: 54
Watches: 32
Advisories: 40
Busiest month: April31 alerts
Busiest day: July 4, 202613 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 7, 7:15 AM CST	Dense Fog Advisory	LOT	5 hr
Jan 18, 2:13 AM CST	Cold Weather Advisory	LOT	34 hr
Jan 20, 4:00 AM CST	Winter Weather Advisory	LOT	23 hr
Jan 21, 3:01 AM CST	Extreme Cold Watch	LOT	24 hr
Jan 22, 3:12 AM CST	Cold Weather Advisory	LOT	55 hr
Jan 22, 3:12 AM CST	Extreme Cold Warning	LOT	33 hr
Jan 25, 2:35 AM CST	Cold Weather Advisory	LOT	32 hr
Feb 16, 5:20 AM CST	Dense Fog Advisory	LOT	4 hr
Feb 17, 1:45 PM CST	Fire Weather Watch	LOT	11 hr
Feb 18, 1:00 AM CST	Red Flag Warning	LOT	17 hr
Feb 18, 1:02 AM CST	Wind Advisory	LOT	17 hr
Feb 19, 1:56 PM CST	Wind Advisory	LOT	26 hr
Feb 27, 5:58 AM CST	Dense Fog Advisory	LOT	2 hr
Mar 4, 1:39 AM CST	Dense Fog Advisory	LOT	7 hr
Mar 4, 8:34 PM CST	Dense Fog Advisory	LOT	37 hr
Mar 10, 2:41 AM CDT	Dense Fog Advisory	LOT	8 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, 6:59 PM CDT	Severe Thunderstorm Warning	LOT	20 min
Mar 10, 7:07 PM CDT	Severe Thunderstorm Warning	LOT	53 min
Mar 10, 7:21 PM CDT	Mesoscale Discussion	SPC	84 min
Mar 10, 7:57 PM CDT	Severe Thunderstorm Warning	LOT	63 min
Mar 12, 1:33 AM CDT	Wind Advisory	LOT	40 hr
Mar 12, 11:28 AM CDT	High Wind Warning	LOT	29 hr
Mar 15, 9:27 AM CDT	Winter Weather Advisory	LOT	39 hr
Mar 15, 6:51 PM CDT	Blizzard Warning	LOT	16 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, 9:28 PM CDT	Severe Thunderstorm Warning	LOT	47 min
Mar 30, 10:42 PM CDT	Severe Thunderstorm Warning	LOT	26 min
Mar 30, 11:29 PM CDT	Mesoscale Discussion	SPC	2 hr
Mar 31, 1:54 AM CDT	Mesoscale Discussion	SPC	96 min
Mar 31, 8:00 AM CDT	Severe Thunderstorm Warning	LOT	45 min
Mar 31, 9:25 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 2, 1:32 AM CDT	Wind Advisory	LOT	17 hr
Apr 2, 12:28 PM CDT	Mesoscale Discussion	SPC	3 hr
Apr 2, 1:43 PM CDT	Tornado Watch	SPC	8 hr
Apr 2, 6:24 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	36 min
Apr 2, 7:00 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	60 min
Apr 2, 7:01 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	59 min
Apr 2, 7:06 PM CDT	Severe Thunderstorm Warning	LOT	24 min
Apr 2, 7:30 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	45 min
Apr 2, 8:01 PM CDT	Areal Flood Advisory	LOT	3 hr
Apr 3, 3:56 PM CDT	Flood Watch	LOT	18 hr
Apr 13, 11:03 AM CDT	Mesoscale Discussion	SPC	87 min
Apr 14, 2:33 PM CDT	Tornado Watch	SPC	9 hr
Apr 14, 7:11 PM CDT	Flood Watch	LOT	30 hr
Apr 14, 9:16 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	44 min
Apr 14, 9:42 PM CDT	Severe Thunderstorm Warning	LOT	18 min
Apr 15, 7:55 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 15, 9:26 PM CDT	Mesoscale Discussion	SPC	94 min
Apr 17, 11:48 AM CDT	Flood Watch	LOT	15 hr
Apr 17, 12:40 PM CDT	Tornado Watch	SPC	9 hr
Apr 17, 6:25 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 17, 7:16 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	74 min
Apr 17, 7:49 PM CDT	Tornado Warning	LOT	41 min
Apr 17, 7:58 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	77 min
Apr 17, 8:09 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 17, 8:29 PM CDT	Tornado Warning	LOT	46 min
Apr 18, 1:29 PM CDT	Frost Advisory	LOT	20 hr
Apr 18, 1:29 PM CDT	Freeze Watch	LOT	12 hr
Apr 19, 1:52 AM CDT	Freeze Warning	LOT	30 hr
Apr 21, 1:07 PM CDT	Mesoscale Discussion	SPC	113 min
Apr 27, 11:18 AM CDT	Wind Advisory	LOT	5 hr
Apr 27, 12:50 PM CDT	High Wind Warning	LOT	3 hr
May 1, 3:32 AM CDT	Frost Advisory	LOT	28 hr
May 4, 3:42 PM CDT	Mesoscale Discussion	SPC	2 hr
May 6, 1:23 PM CDT	Frost Advisory	LOT	19 hr
Jun 8, 12:58 PM CDT	Mesoscale Discussion	SPC	92 min
Jun 10, 12:00 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 10, 2:06 PM CDT	Mesoscale Discussion	SPC	54 min
Jun 10, 2:09 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	66 min
Jun 10, 2:38 PM CDT	Severe Thunderstorm Warning	LOT	48 min
Jun 10, 6:54 PM CDT	Flood Watch	LOT	7 hr
Jun 10, 7:06 PM CDT	Tornado Watch	SPC	4 hr
Jun 10, 7:20 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	70 min
Jun 10, 7:55 PM CDT	Mesoscale Discussion	SPC	95 min
Jun 11, 10:05 AM CDT	Flood Watch	LOT	11 hr
Jun 11, 1:57 PM CDT	Tornado Watch	SPC	7 hr
Jun 11, 5:39 PM CDT	Severe Thunderstorm Warning	LOT	51 min
Jun 11, 6:10 PM CDT	Severe Thunderstorm Warning	LOT	65 min
Jun 11, 6:14 PM CDT	Mesoscale Discussion	SPC	91 min
Jun 11, 6:52 PM CDT	Severe Thunderstorm Warning	LOT	42 min
Jun 11, 7:03 PM CDT	Areal Flood Advisory	LOT	2 hr
Jun 11, 9:06 PM CDT	Areal Flood Advisory	LOT	22 hr
Jun 17, 2:20 AM CDT	Flood Watch	LOT	15 hr
Jun 17, 9:17 AM CDT	Wind Advisory	LOT	5 hr
Jun 24, 12:44 PM CDT	Mesoscale Discussion	SPC	3 hr
Jun 24, 1:55 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 24, 5:28 PM CDT	Mesoscale Discussion	SPC	92 min
Jun 24, 5:35 PM CDT	Severe Thunderstorm Warning	LOT	55 min
Jun 24, 6:04 PM CDT	Severe Thunderstorm Warning	LOT	41 min
Jun 24, 8:06 PM CDT	Mesoscale Discussion	SPC	84 min
Jun 28, 2:47 AM CDT	Heat Advisory	LOT	47 hr
Jun 28, 11:18 AM CDT	Extreme Heat Warning	LOT	5 days
Jul 1, 2:34 PM CDT	Mesoscale Discussion	SPC	116 min
Jul 2, 7:40 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 2, 11:15 PM CDT	Severe Thunderstorm Warning	LOT	60 min
Jul 2, 11:43 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 3, 12:00 AM CDT	Areal Flood Advisory	LOT	2 hr
Jul 3, 12:16 AM CDT	Flash Flood Warning	LOT	114 min
Jul 3, 2:04 AM CDT	Areal Flood Warning	LOT	6 hr
Jul 3, 11:15 AM CDT	Mesoscale Discussion	SPC	2 hr
Jul 3, 11:52 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 3, 12:21 PM CDT	Severe Thunderstorm Warning	LOT	54 min
Jul 3, 5:05 PM CDT	Mesoscale Discussion	SPC	115 min
Jul 3, 6:37 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 3, 7:06 PM CDT	Severe Thunderstorm Warning	LOT	39 min
Jul 3, 7:33 PM CDT	Severe Thunderstorm Warning	LOT	30 min
Jul 3, 8:22 PM CDT	Severe Thunderstorm Warning	LOT	53 min
Jul 3, 8:32 PM CDT	Flood Watch	LOT	4 hr
Jul 3, 8:33 PM CDT	Mesoscale Discussion	SPC	117 min
Jul 3, 8:56 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	49 min
Jul 4, 9:39 AM CDT	Flood Watch	LOT	10 hr
Jul 4, 11:24 AM CDT	Mesoscale Discussion	SPC	3 hr
Jul 4, 1:53 PM CDT	Severe Thunderstorm Warning	LOT	40 min
Jul 4, 2:03 PM CDT	Flash Flood Warning	LOT	3 hr
Jul 4, 5:04 PM CDT	Areal Flood Warning	LOT	2 hr
Jul 4, 6:48 PM CDT	Areal Flood Warning	LOT	14 hr
Jul 4, 6:48 PM CDT	Areal Flood Warning	LOT	14 hr
Jul 5, 8:22 AM CDT	Areal Flood Advisory	LOT	3 hr
Jul 5, 8:24 AM CDT	Areal Flood Advisory	LOT	3 hr
Jul 27, 2:10 AM CDT	Extreme Heat Warning	LOT	19 hr
Jul 27, 3:02 AM CDT	Dense Fog Advisory	LOT	5 hr
Aug 9, 5:03 PM CDT	Flood Watch	LOT	10 hr
Aug 9, 8:14 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 9, 8:43 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 9, 10:16 PM CDT	Areal Flood Advisory	LOT	78 min
Aug 9, 10:53 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 9, 11:32 PM CDT	Areal Flood Advisory	LOT	2 hr
Aug 10, 12:47 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 10, 5:15 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 11, 7:22 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 11, 9:00 AM CDT	Mesoscale Discussion	SPC	2 hr
Aug 11, 9:22 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	53 min
Aug 11, 9:32 AM CDT	Areal Flood Advisory	LOT	4 hr
Aug 11, 8:04 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 12, 6:41 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 12, 8:31 AM CDT	Severe Thunderstorm Warning	LOT	57 min
Aug 12, 9:06 AM CDT	Areal Flood Advisory	LOT	3 hr
Aug 13, 2:08 AM CDT	Flood Watch	LOT	32 hr
Aug 13, 2:42 AM CDT	Dense Fog Advisory	LOT	6 hr
Aug 14, 12:01 PM CDT	Flood Watch	LOT	22 hr
Aug 21, 2:17 PM CDT	Severe Thunderstorm Warning	LOT	43 min
Aug 21, 2:22 PM CDT	Mesoscale Discussion	SPC	113 min
Aug 21, 2:57 PM CDT	Severe Thunderstorm Warning	LOT	63 min
Aug 21, 2:57 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Aug 21, 4:55 PM CDT	Severe Thunderstorm Warning	LOT	40 min
Aug 21, 5:44 PM CDT	Severe Thunderstorm Warning	LOT	46 min
Aug 21, 6:13 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 31, 12:24 PM CDT	Heat Advisory	LOT	33 hr
Aug 31, 12:24 PM CDT	Heat Advisory	LOT	3 days
Sep 3, 7:56 PM CDT	Heat Advisory	LOT	25 hr
Sep 4, 9:01 PM CDT	Mesoscale Discussion	SPC	3 hr
Sep 10, 3:11 AM CDT	Dense Fog Advisory	LOT	5 hr
Sep 17, 6:49 AM CDT	Areal Flood Advisory	LOT	5 hr
Sep 17, 7:07 AM CDT	Flash Flood Warning	LOT	2 hr
Sep 18, 1:47 PM CDT	Flood Watch	LOT	47 hr
Sep 20, 12:16 AM CDT	Areal Flood Advisory	LOT	116 min
Sep 20, 2:12 AM CDT	Flash Flood Warning	LOT	5 hr
Sep 20, 7:32 AM CDT	Areal Flood Advisory	LOT	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	36
Tornado Warning	2
Severe Thunderstorm Watch	12
Tornado Watch	5
Mesoscale Discussion	35
Flooding
Areal Flood Warning	4
Flash Flood Warning	4
Flood Watch	12
Areal Flood Advisory	13
Winter
Blizzard Warning	1
Winter Weather Advisory	2
Heat
Extreme Heat Warning	2
Heat Advisory	4
Cold
Extreme Cold Warning	1
Freeze Warning	1
Extreme Cold Watch	1
Freeze Watch	1
Cold Weather Advisory	3
Frost Advisory	3
Wind and dust
High Wind Warning	2
Wind Advisory	6
Fire
Red Flag Warning	1
Fire Weather Watch	1
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 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.