Alert archive / Illinois / McHenry County

Weather alerts in McHenry County, Illinois, 2011

162 weather alerts in 2011, 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 2011. Tap one for its archive.

Alerts: 162
Warnings: 47
Watches: 24
Advisories: 42
Busiest month: May37 alerts
Busiest day: May 11, 201112 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 17, 4:10 AM CST	Winter Weather Advisory	LOT	24 hr
Jan 19, 2:50 PM CST	Wind Chill Advisory	LOT	44 hr
Jan 30, 5:26 AM CST	Winter Storm Watch	LOT	6 hr
Jan 30, 11:34 AM CST	Blizzard Watch	LOT	28 hr
Jan 31, 3:20 PM CST	Blizzard Warning	LOT	48 hr
Feb 1, 3:36 PM CST	Mesoscale Discussion	SPC	6 hr
Feb 2, 2:33 AM CST	Mesoscale Discussion	SPC	4 hr
Feb 2, 4:31 AM CST	Wind Chill Watch	LOT	11 hr
Feb 2, 3:26 PM CST	Wind Chill Advisory	LOT	19 hr
Feb 8, 3:50 AM CST	Wind Chill Advisory	LOT	29 hr
Feb 9, 3:09 PM CST	Wind Chill Advisory	LOT	19 hr
Feb 16, 8:32 PM CST	Dense Fog Advisory	LOT	6 hr
Feb 19, 4:44 AM CST	Winter Storm Watch	LOT	11 hr
Feb 19, 3:51 PM CST	Winter Storm Warning	LOT	18 hr
Feb 20, 4:35 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 20, 9:30 PM CST	Winter Weather Advisory	LOT	14 hr
Feb 21, 4:18 AM CST	Winter Weather Advisory	LOT	24 hr
Feb 24, 4:12 AM CST	Winter Weather Advisory	LOT	27 hr
Feb 26, 9:12 PM CST	Freezing Rain Advisory	LOT	7 hr
Feb 27, 3:37 PM CST	Winter Weather Advisory	LOT	12 hr
Feb 27, 8:49 PM CST	Mesoscale Discussion	SPC	6 hr
Mar 20, 2:51 PM CDT	Special Weather Statement	LOT	24 min
Mar 20, 3:07 PM CDT	Areal Flood Advisory	LOT	7 hr
Mar 20, 3:16 PM CDT	Special Weather Statement	LOT	44 min
Mar 22, 10:35 AM CDT	River Flood Watch	LOT	24 hr
Mar 23, 4:28 AM CDT	River Flood Warning	LOT	6 days
Apr 3, 8:54 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 3, 10:23 PM CDT	Mesoscale Discussion	SPC	67 min
Apr 4, 1:53 AM CDT	Mesoscale Discussion	SPC	97 min
Apr 7, 5:13 AM CDT	Dense Fog Advisory	LOT	7 hr
Apr 10, 6:05 PM CDT	Tornado Watch	SPC	7 hr
Apr 15, 4:12 AM CDT	Wind Advisory	LOT	16 hr
Apr 26, 10:15 AM CDT	River Flood Advisory	LOT	58 hr
Apr 28, 8:15 PM CDT	Frost Advisory	LOT	12 hr
Apr 28, 8:23 PM CDT	River Flood Warning	LOT	4 days
May 2, 4:02 PM CDT	Frost Advisory	LOT	15 hr
May 3, 4:02 PM CDT	Frost Advisory	LOT	16 hr
May 11, 12:55 PM CDT	Mesoscale Discussion	SPC	65 min
May 11, 1:23 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 11, 3:19 PM CDT	Severe Thunderstorm Warning	LOT	56 min
May 11, 3:38 PM CDT	Mesoscale Discussion	SPC	2 hr
May 11, 4:04 PM CDT	Areal Flood Advisory	LOT	65 min
May 11, 4:06 PM CDT	Severe Thunderstorm Warning	LOT	54 min
May 11, 4:36 PM CDT	Areal Flood Advisory	LOT	32 min
May 11, 4:51 PM CDT	Severe Thunderstorm Warning	LOT	54 min
May 11, 5:02 PM CDT	Flash Flood Warning	LOT	4 hr
May 11, 5:11 PM CDT	Severe Thunderstorm Warning	LOT	49 min
May 11, 5:38 PM CDT	Severe Thunderstorm Warning	LOT	33 min
May 11, 5:56 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 12, 4:58 PM CDT	Tornado Warning	LOT	32 min
May 12, 5:25 PM CDT	Tornado Warning	LOT	20 min
May 13, 12:35 PM CDT	Severe Thunderstorm Warning	LOT	55 min
May 13, 1:02 PM CDT	Areal Flood Advisory	LOT	3 hr
May 13, 1:33 PM CDT	Flash Flood Warning	LOT	6 hr
May 16, 3:11 PM CDT	Frost Advisory	LOT	16 hr
May 22, 4:41 AM CDT	Mesoscale Discussion	SPC	2 hr
May 22, 1:49 PM CDT	Mesoscale Discussion	SPC	56 min
May 22, 2:04 PM CDT	Tornado Watch	SPC	9 hr
May 22, 5:47 PM CDT	Mesoscale Discussion	SPC	88 min
May 22, 6:54 PM CDT	Tornado Warning	LOT	51 min
May 22, 7:22 PM CDT	Severe Thunderstorm Warning	LOT	53 min
May 22, 8:15 PM CDT	Severe Thunderstorm Warning	LOT	60 min
May 22, 8:17 PM CDT	Severe Thunderstorm Warning	LOT	58 min
May 22, 9:35 PM CDT	Mesoscale Discussion	SPC	55 min
May 22, 10:24 PM CDT	Special Weather Statement	LOT	66 min
May 25, 7:49 AM CDT	Special Weather Statement	LOT	41 min
May 29, 2:10 AM CDT	Dense Fog Advisory	LOT	7 hr
May 29, 8:39 AM CDT	Mesoscale Discussion	SPC	66 min
May 29, 8:53 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 29, 10:34 AM CDT	Areal Flood Advisory	LOT	6 hr
May 29, 12:38 PM CDT	Flash Flood Warning	LOT	5 hr
May 31, 12:59 PM CDT	Mesoscale Discussion	SPC	3 hr
Jun 6, 6:15 AM CDT	Mesoscale Discussion	SPC	90 min
Jun 6, 7:00 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 8, 11:08 AM CDT	Mesoscale Discussion	SPC	97 min
Jun 8, 4:49 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 8, 8:43 PM CDT	Mesoscale Discussion	SPC	92 min
Jun 8, 8:46 PM CDT	Special Weather Statement	LOT	29 min
Jun 8, 9:10 PM CDT	Severe Thunderstorm Warning	LOT	65 min
Jun 8, 9:27 PM CDT	Severe Thunderstorm Warning	LOT	50 min
Jun 8, 10:14 PM CDT	Severe Thunderstorm Warning	LOT	61 min
Jun 8, 10:20 PM CDT	Severe Thunderstorm Warning	LOT	55 min
Jun 8, 10:30 PM CDT	Areal Flood Advisory	LOT	6 hr
Jun 8, 11:55 PM CDT	Areal Flood Advisory	LOT	6 hr
Jun 9, 1:44 AM CDT	Special Weather Statement	LOT	46 min
Jun 9, 5:46 AM CDT	Mesoscale Discussion	SPC	59 min
Jun 9, 3:24 PM CDT	Flash Flood Watch	LOT	17 hr
Jun 19, 5:18 PM CDT	Special Weather Statement	LOT	27 min
Jun 19, 5:24 PM CDT	Severe Thunderstorm Warning	LOT	36 min
Jun 19, 5:53 PM CDT	Severe Thunderstorm Warning	LOT	26 min
Jun 21, 11:45 AM CDT	Mesoscale Discussion	SPC	3 hr
Jun 21, 4:56 PM CDT	Mesoscale Discussion	SPC	94 min
Jun 21, 5:42 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 21, 7:22 PM CDT	Severe Thunderstorm Warning	LOT	23 min
Jun 21, 8:22 PM CDT	Severe Thunderstorm Warning	LOT	53 min
Jun 30, 10:59 AM CDT	Heat Advisory	LOT	34 hr
Jul 10, 2:45 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 11, 5:07 AM CDT	Mesoscale Discussion	SPC	113 min
Jul 11, 5:37 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 11, 7:03 AM CDT	Severe Thunderstorm Warning	LOT	57 min
Jul 11, 7:10 AM CDT	Mesoscale Discussion	SPC	95 min
Jul 11, 8:01 AM CDT	Special Weather Statement	LOT	29 min
Jul 17, 3:40 PM CDT	Heat Advisory	LOT	60 hr
Jul 18, 6:30 AM CDT	Mesoscale Discussion	SPC	2 hr
Jul 19, 2:26 AM CDT	Excessive Heat Watch	LOT	14 hr
Jul 19, 2:26 AM CDT	Excessive Heat Warning	LOT	5 days
Jul 19, 11:27 PM CDT	Severe Thunderstorm Watch	SPC	2 hr
Jul 21, 12:49 PM CDT	Mesoscale Discussion	SPC	56 min
Jul 22, 4:35 AM CDT	Special Weather Statement	LOT	40 min
Jul 22, 6:07 AM CDT	Areal Flood Advisory	LOT	6 hr
Jul 22, 9:02 AM CDT	Flash Flood Warning	LOT	2 hr
Jul 22, 7:38 PM CDT	Mesoscale Discussion	SPC	97 min
Jul 23, 12:36 AM CDT	Flash Flood Warning	LOT	6 hr
Jul 23, 12:41 AM CDT	Severe Thunderstorm Warning	LOT	64 min
Jul 23, 6:30 AM CDT	Flash Flood Warning	LOT	5 hr
Jul 23, 9:37 AM CDT	River Flood Warning	LOT	11 hr
Jul 23, 4:15 PM CDT	Flash Flood Watch	LOT	18 hr
Jul 24, 6:19 AM CDT	Severe Thunderstorm Warning	LOT	56 min
Jul 27, 8:43 AM CDT	Special Weather Statement	LOT	62 min
Jul 27, 9:35 AM CDT	Areal Flood Advisory	LOT	4 hr
Jul 27, 11:44 AM CDT	Flash Flood Watch	LOT	43 hr
Jul 27, 6:54 PM CDT	Mesoscale Discussion	SPC	66 min
Jul 27, 7:43 PM CDT	Tornado Watch	SPC	5 hr
Jul 27, 9:29 PM CDT	Severe Thunderstorm Warning	LOT	61 min
Jul 27, 9:43 PM CDT	Mesoscale Discussion	SPC	62 min
Jul 27, 10:10 PM CDT	Severe Thunderstorm Warning	LOT	80 min
Jul 28, 12:36 AM CDT	Mesoscale Discussion	SPC	84 min
Jul 28, 11:51 PM CDT	Mesoscale Discussion	SPC	84 min
Jul 29, 1:08 AM CDT	Special Weather Statement	LOT	52 min
Aug 2, 3:38 AM CDT	Heat Advisory	LOT	20 hr
Aug 2, 6:19 AM CDT	Mesoscale Discussion	SPC	86 min
Aug 2, 12:57 PM CDT	Mesoscale Discussion	SPC	93 min
Aug 2, 5:22 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Aug 2, 5:36 PM CDT	Severe Thunderstorm Warning	LOT	54 min
Aug 2, 5:56 PM CDT	Severe Thunderstorm Warning	LOT	70 min
Aug 2, 8:39 PM CDT	Severe Thunderstorm Warning	LOT	66 min
Aug 7, 3:40 PM CDT	Severe Thunderstorm Warning	LOT	47 min
Aug 13, 11:29 AM CDT	Severe Thunderstorm Warning	LOT	46 min
Aug 13, 11:45 AM CDT	Mesoscale Discussion	SPC	60 min
Aug 13, 12:12 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Aug 13, 12:19 PM CDT	Special Weather Statement	LOT	56 min
Aug 13, 12:55 PM CDT	Severe Thunderstorm Warning	LOT	50 min
Aug 13, 5:17 PM CDT	Areal Flood Advisory	LOT	2 hr
Aug 17, 3:44 PM CDT	Mesoscale Discussion	SPC	91 min
Aug 20, 8:10 AM CDT	Severe Thunderstorm Warning	LOT	65 min
Aug 20, 8:53 AM CDT	Severe Thunderstorm Warning	LOT	37 min
Aug 20, 9:25 AM CDT	Severe Thunderstorm Warning	LOT	65 min
Aug 23, 8:36 AM CDT	Special Weather Statement	LOT	39 min
Sep 3, 12:48 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 3, 12:24 PM CDT	Mesoscale Discussion	SPC	66 min
Sep 26, 11:47 AM CDT	Areal Flood Advisory	LOT	14 hr
Sep 28, 3:37 PM CDT	Wind Advisory	LOT	45 hr
Sep 29, 5:45 PM CDT	Special Weather Statement	LOT	60 min
Oct 1, 3:48 PM CDT	Frost Advisory	LOT	16 hr
Oct 19, 3:56 AM CDT	Wind Advisory	LOT	24 hr
Oct 20, 3:46 AM CDT	Frost Advisory	LOT	29 hr
Oct 21, 2:01 PM CDT	Frost Advisory	LOT	18 hr
Oct 27, 2:48 PM CDT	Frost Advisory	LOT	16 hr
Oct 28, 3:42 PM CDT	Freeze Warning	LOT	17 hr
Oct 29, 3:19 PM CDT	Frost Advisory	LOT	17 hr
Nov 12, 4:08 PM CST	Wind Advisory	LOT	26 hr
Nov 18, 10:20 AM CST	Wind 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	31
Tornado Warning	3
Severe Thunderstorm Watch	12
Tornado Watch	3
Mesoscale Discussion	35
Special Weather Statement	14
Flooding
Flash Flood Warning	6
River Flood Warning	3
Flash Flood Watch	3
River Flood Watch	1
Areal Flood Advisory	11
River Flood Advisory	1
Winter
Blizzard Warning	1
Winter Storm Warning	1
Blizzard Watch	1
Winter Storm Watch	2
Freezing Rain Advisory	1
Winter Weather Advisory	5
Heat
Excessive Heat Warning	1
Excessive Heat Watch	1
Heat Advisory	3
Cold
Freeze Warning	1
Wind Chill Watch	1
Frost Advisory	9
Wind Chill Advisory	4
Wind and dust
Wind Advisory	5
Fog and smoke
Dense Fog Advisory	3

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2010 2012

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.