Alert archive / Illinois / McHenry County

Weather alerts in McHenry County, Illinois, 2024

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

McHenry County and its neighbors

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

Alerts: 155
Warnings: 35
Watches: 25
Advisories: 43
Busiest month: May26 alerts
Busiest day: July 14, 202411 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, 1:55 PM CST	Winter Storm Watch	LOT	24 hr
Jan 8, 3:00 AM CST	Winter Weather Advisory	LOT	47 hr
Jan 8, 2:07 PM CST	Winter Storm Warning	LOT	36 hr
Jan 9, 1:09 PM CST	Mesoscale Discussion	SPC	3 hr
Jan 10, 2:18 PM CST	Winter Storm Watch	LOT	24 hr
Jan 11, 2:22 PM CST	Winter Storm Warning	LOT	37 hr
Jan 12, 4:23 AM CST	Mesoscale Discussion	SPC	4 hr
Jan 12, 9:31 AM CST	Winter Weather Advisory	LOT	26 hr
Jan 12, 10:24 AM CST	Mesoscale Discussion	SPC	4 hr
Jan 13, 3:29 AM CST	Wind Chill Advisory	LOT	4 days
Jan 13, 2:17 PM CST	Wind Chill Warning	LOT	70 hr
Jan 13, 2:17 PM CST	Winter Weather Advisory	LOT	20 hr
Jan 14, 3:32 AM CST	Wind Chill Advisory	LOT	3 days
Jan 18, 3:41 AM CST	Winter Weather Advisory	LOT	26 hr
Jan 19, 3:28 AM CST	Wind Chill Advisory	LOT	30 hr
Jan 20, 2:44 AM CST	Wind Chill Advisory	LOT	31 hr
Jan 21, 2:42 PM CST	Winter Weather Advisory	LOT	42 hr
Jan 22, 3:21 AM CST	Winter Weather Advisory	LOT	33 hr
Jan 23, 1:57 PM CST	Dense Fog Advisory	LOT	22 hr
Jan 24, 2:57 PM CST	Dense Fog Advisory	LOT	30 hr
Jan 26, 8:39 AM CST	Dense Fog Advisory	LOT	5 hr
Jan 26, 1:22 PM CST	Dense Fog Advisory	LOT	33 hr
Feb 4, 10:23 PM CST	Dense Fog Advisory	LOT	8 hr
Feb 6, 1:34 AM CST	Dense Fog Advisory	LOT	10 hr
Feb 6, 9:08 PM CST	Dense Fog Advisory	LOT	12 hr
Feb 26, 3:05 AM CST	Red Flag Warning	LOT	15 hr
Feb 27, 2:35 PM CST	Wind Advisory	LOT	15 hr
Feb 27, 2:50 PM CST	Mesoscale Discussion	SPC	115 min
Feb 27, 3:53 PM CST	Tornado Watch	SPC	6 hr
Feb 27, 5:59 PM CST	Mesoscale Discussion	SPC	91 min
Feb 27, 7:07 PM CST	Severe Thunderstorm Warning Considerable damage threat	LOT	68 min
Feb 27, 7:17 PM CST	Tornado Warning	LOT	28 min
Mar 3, 2:13 PM CST	Wind Advisory	LOT	4 hr
Mar 4, 1:25 PM CST	Mesoscale Discussion	SPC	2 hr
Mar 21, 3:30 AM CDT	Winter Weather Advisory	LOT	37 hr
Mar 22, 8:08 AM CDT	Winter Storm Warning	LOT	8 hr
Apr 1, 9:09 PM CDT	River Flood Warning	LOT	14 days
Apr 2, 3:52 PM CDT	Winter Weather Advisory	LOT	19 hr
Apr 20, 2:41 PM CDT	Freeze Warning	LOT	17 hr
Apr 21, 2:29 PM CDT	Frost Advisory	LOT	18 hr
Apr 23, 2:52 PM CDT	Mesoscale Discussion	SPC	113 min
Apr 24, 2:41 AM CDT	Freeze Watch	LOT	12 hr
Apr 24, 2:58 PM CDT	Freeze Warning	LOT	17 hr
Apr 26, 4:15 PM CDT	Special Weather Statement	LOT	45 min
Apr 27, 7:58 PM CDT	Mesoscale Discussion	SPC	62 min
May 2, 3:07 PM CDT	Mesoscale Discussion	SPC	113 min
May 4, 1:56 PM CDT	Mesoscale Discussion	SPC	94 min
May 4, 5:04 PM CDT	Special Weather Statement	LOT	26 min
May 4, 5:41 PM CDT	Special Weather Statement	LOT	34 min
May 7, 1:28 PM CDT	Tornado Watch	SPC	12 hr
May 7, 2:03 PM CDT	Severe Thunderstorm Warning	LOT	27 min
May 7, 2:11 PM CDT	Tornado Warning	LOT	19 min
May 7, 2:29 PM CDT	Severe Thunderstorm Warning	LOT	17 min
May 13, 5:22 PM CDT	Areal Flood Advisory	LOT	4 hr
May 20, 10:13 AM CDT	Mesoscale Discussion	SPC	92 min
May 20, 12:38 PM CDT	Severe Thunderstorm Warning	LOT	37 min
May 20, 12:39 PM CDT	Severe Thunderstorm Watch	SPC	3 hr
May 21, 7:13 PM CDT	Tornado Watch	SPC	5 hr
May 21, 7:56 PM CDT	Mesoscale Discussion	SPC	64 min
May 21, 10:20 PM CDT	Wind Advisory	LOT	6 hr
May 21, 11:41 PM CDT	Special Weather Statement	LOT	19 min
May 24, 6:07 AM CDT	Severe Thunderstorm Watch	SPC	9 hr
May 24, 8:44 AM CDT	Mesoscale Discussion	SPC	2 hr
May 24, 4:46 PM CDT	Mesoscale Discussion	SPC	119 min
May 24, 6:31 PM CDT	Special Weather Statement	LOT	44 min
May 26, 3:26 PM CDT	Mesoscale Discussion	SPC	94 min
May 26, 5:34 PM CDT	Special Weather Statement	LOT	56 min
May 26, 5:53 PM CDT	Mesoscale Discussion	SPC	67 min
May 26, 6:10 PM CDT	Severe Thunderstorm Warning	LOT	80 min
May 26, 6:20 PM CDT	Tornado Warning	LOT	55 min
May 28, 1:02 PM CDT	Mesoscale Discussion	SPC	3 hr
Jun 12, 4:51 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 13, 6:31 AM CDT	Special Weather Statement	LOT	29 min
Jun 13, 7:01 AM CDT	Special Weather Statement	LOT	44 min
Jun 16, 2:15 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 16, 3:42 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 16, 5:04 PM CDT	Severe Thunderstorm Warning	LOT	41 min
Jun 19, 3:58 PM CDT	Mesoscale Discussion	SPC	92 min
Jun 22, 6:55 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 22, 7:36 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 22, 7:37 PM CDT	Flood Watch	LOT	5 hr
Jun 22, 8:09 PM CDT	Severe Thunderstorm Warning	LOT	51 min
Jun 22, 8:40 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	50 min
Jun 22, 8:54 PM CDT	Areal Flood Advisory	LOT	31 min
Jun 22, 9:13 PM CDT	Flash Flood Warning	LOT	4 hr
Jun 23, 1:18 AM CDT	Areal Flood Warning	LOT	9 hr
Jun 24, 7:31 PM CDT	Severe Thunderstorm Watch	SPC	3 hr
Jun 25, 1:25 AM CDT	Severe Thunderstorm Warning	LOT	14 min
Jun 25, 4:09 AM CDT	Mesoscale Discussion	SPC	96 min
Jun 25, 5:00 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 25, 5:20 AM CDT	Severe Thunderstorm Warning	LOT	27 min
Jun 25, 5:59 AM CDT	Special Weather Statement	LOT	31 min
Jun 25, 6:28 AM CDT	Mesoscale Discussion	SPC	92 min
Jun 25, 7:27 AM CDT	Special Weather Statement	LOT	33 min
Jun 25, 4:52 PM CDT	Flood Watch	LOT	4 hr
Jun 25, 4:54 PM CDT	Mesoscale Discussion	SPC	96 min
Jul 7, 11:49 AM CDT	Special Weather Statement	LOT	56 min
Jul 13, 9:35 PM CDT	Special Weather Statement	LOT	25 min
Jul 13, 10:13 PM CDT	Special Weather Statement	LOT	47 min
Jul 13, 10:49 PM CDT	Areal Flood Advisory	LOT	3 hr
Jul 13, 11:16 PM CDT	Flash Flood Warning	LOT	5 hr
Jul 13, 11:41 PM CDT	Areal Flood Advisory	LOT	3 hr
Jul 14, 2:19 AM CDT	Flood Watch	LOT	9 hr
Jul 14, 3:46 AM CDT	Areal Flood Warning	LOT	6 hr
Jul 14, 10:46 AM CDT	Areal Flood Advisory	LOT	6 hr
Jul 14, 3:03 PM CDT	Flood Watch	LOT	11 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 14, 9:11 PM CDT	Severe Thunderstorm Warning	LOT	34 min
Jul 15, 12:26 PM CDT	River Flood Watch	LOT	4 days
Jul 15, 12:52 PM CDT	Flood Watch	LOT	14 hr
Jul 15, 1:59 PM CDT	Mesoscale Discussion	SPC	3 hr
Jul 15, 6:06 PM CDT	Mesoscale Discussion	SPC	114 min
Jul 15, 6:53 PM CDT	Tornado Watch	SPC	6 hr
Jul 15, 8:01 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	74 min
Jul 15, 8:26 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 15, 8:31 PM CDT	Tornado Warning	LOT	24 min
Jul 23, 4:35 PM CDT	Special Weather Statement	LOT	55 min
Jul 23, 5:07 PM CDT	Areal Flood Advisory	LOT	3 hr
Jul 23, 5:38 PM CDT	Flash Flood Warning	LOT	3 hr
Aug 5, 5:09 PM CDT	Mesoscale Discussion	SPC	66 min
Aug 5, 5:52 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 6, 2:26 AM CDT	Mesoscale Discussion	SPC	2 hr
Aug 6, 2:53 AM CDT	Special Weather Statement	LOT	52 min
Aug 6, 3:20 AM CDT	Severe Thunderstorm Warning	LOT	40 min
Aug 14, 3:43 AM CDT	Dense Fog Advisory	LOT	5 hr
Aug 16, 1:53 PM CDT	Mesoscale Discussion	SPC	3 hr
Aug 16, 5:31 PM CDT	Mesoscale Discussion	SPC	119 min
Aug 24, 2:32 PM CDT	Excessive Heat Watch	LOT	48 hr
Aug 25, 3:35 AM CDT	Heat Advisory	LOT	40 hr
Aug 25, 2:13 PM CDT	Excessive Heat Warning	LOT	54 hr
Aug 27, 11:25 AM CDT	Mesoscale Discussion	SPC	3 hr
Aug 27, 12:04 PM CDT	Severe Thunderstorm Watch	SPC	2 hr
Aug 27, 4:46 PM CDT	Severe Thunderstorm Warning	LOT	44 min
Aug 27, 4:47 PM CDT	Mesoscale Discussion	SPC	88 min
Aug 27, 5:09 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 27, 5:17 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	73 min
Aug 27, 6:24 PM CDT	Mesoscale Discussion	SPC	96 min
Sep 18, 3:21 AM CDT	Dense Fog Advisory	LOT	5 hr
Sep 25, 12:23 AM CDT	Dense Fog Advisory	LOT	9 hr
Oct 14, 1:24 PM CDT	Freeze Watch	LOT	14 hr
Oct 15, 3:29 AM CDT	Freeze Warning	LOT	30 hr
Oct 16, 1:54 PM CDT	Freeze Warning	LOT	19 hr
Oct 30, 3:06 PM CDT	Wind Advisory	LOT	31 hr
Nov 17, 10:55 PM CST	Dense Fog Advisory	LOT	7 hr
Nov 21, 3:58 AM CST	Winter Weather Advisory	LOT	11 hr
Nov 21, 3:59 AM CST	Wind Advisory	LOT	10 hr
Nov 21, 9:26 AM CST	Mesoscale Discussion	SPC	3 hr
Dec 4, 2:19 AM CST	Wind Advisory	LOT	22 hr
Dec 14, 2:22 AM CST	Winter Weather Advisory	LOT	16 hr
Dec 15, 2:48 AM CST	Dense Fog Advisory	LOT	9 hr
Dec 15, 3:12 PM CST	Dense Fog Advisory	LOT	20 hr
Dec 26, 5:14 AM CST	Dense Fog Advisory	LOT	16 hr
Dec 30, 5:23 AM CST	Dense Fog Advisory	LOT	7 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	15
Tornado Warning	4
Severe Thunderstorm Watch	10
Tornado Watch	4
Mesoscale Discussion	37
Special Weather Statement	15
Flooding
Areal Flood Warning	2
Flash Flood Warning	3
River Flood Warning	1
Flood Watch	5
River Flood Watch	1
Areal Flood Advisory	6
Winter
Winter Storm Warning	3
Winter Storm Watch	2
Winter Weather Advisory	10
Heat
Excessive Heat Warning	1
Excessive Heat Watch	1
Heat Advisory	1
Cold
Freeze Warning	4
Wind Chill Warning	1
Freeze Watch	2
Frost Advisory	1
Wind Chill Advisory	4
Wind and dust
Wind Advisory	6
Fire
Red Flag Warning	1
Fog and smoke
Dense Fog Advisory	15

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. Rebuilt daily.