Alert archive / Illinois / McHenry County

Weather alerts in McHenry County, Illinois, 2009

137 weather alerts in 2009, 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 2009. Tap one for its archive.

Alerts: 137
Warnings: 35
Watches: 23
Advisories: 49
Busiest month: June33 alerts
Busiest day: June 19, 200917 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 8, 2:53 PM CST	Winter Weather Advisory	LOT	51 hr
Jan 12, 4:21 AM CST	Blizzard Watch	LOT	7 hr
Jan 12, 4:21 AM CST	Winter Weather Advisory	LOT	28 hr
Jan 12, 11:49 AM CST	Blizzard Warning	LOT	16 hr
Jan 12, 3:40 PM CST	Blizzard Watch	LOT	19 hr
Jan 13, 2:07 PM CST	Wind Chill Watch	LOT	13 hr
Jan 13, 3:02 PM CST	Winter Weather Advisory	LOT	33 hr
Jan 13, 11:38 PM CST	Mesoscale Discussion	SPC	4 hr
Jan 14, 3:23 AM CST	Wind Chill Warning	LOT	57 hr
Jan 16, 3:08 PM CST	Wind Chill Advisory	LOT	9 hr
Jan 23, 4:14 AM CST	Wind Chill Advisory	LOT	32 hr
Feb 9, 3:53 AM CST	Freezing Fog Advisory	LOT	5 hr
Feb 11, 1:31 AM CST	Dense Fog Advisory	LOT	7 hr
Feb 18, 4:13 AM CST	Dense Fog Advisory	LOT	5 hr
Feb 19, 1:38 PM CST	Winter Storm Watch	LOT	14 hr
Feb 20, 3:41 AM CST	Winter Storm Warning	LOT	34 hr
Feb 20, 3:41 AM CST	Winter Weather Advisory	LOT	41 hr
Feb 20, 11:57 PM CST	Mesoscale Discussion	SPC	5 hr
Mar 6, 5:29 AM CST	Dense Fog Advisory	LOT	5 hr
Mar 6, 3:28 PM CST	Flash Flood Watch	LOT	48 hr
Mar 8, 4:03 AM CDT	Areal Flood Warning	LOT	30 hr
Mar 8, 1:30 PM CDT	River Flood Warning	LOT	11 days
Mar 9, 3:39 AM CDT	Flash Flood Watch	LOT	24 hr
Mar 10, 2:03 AM CDT	Areal Flood Warning	LOT	36 hr
Mar 10, 3:37 AM CDT	Wind Advisory	LOT	27 hr
Mar 24, 7:03 PM CDT	Areal Flood Advisory	LOT	86 days
Mar 24, 10:05 PM CDT	Severe Thunderstorm Warning	LOT	55 min
Mar 24, 10:28 PM CDT	Mesoscale Discussion	SPC	92 min
Mar 24, 11:13 PM CDT	Severe Thunderstorm Warning	LOT	62 min
Mar 27, 12:58 PM CDT	Winter Storm Watch	LOT	19 hr
Mar 28, 3:40 AM CDT	Winter Storm Warning	LOT	24 hr
Mar 29, 3:11 AM CDT	Winter Weather Advisory	LOT	8 hr
Mar 29, 3:42 AM CDT	Mesoscale Discussion	SPC	4 hr
Mar 31, 6:00 PM CDT	Mesoscale Discussion	SPC	60 min
Apr 4, 4:47 AM CDT	Winter Weather Advisory	LOT	42 hr
Apr 25, 5:32 PM CDT	Mesoscale Discussion	SPC	73 min
Apr 26, 5:46 AM CDT	Areal Flood Advisory	LOT	54 days
Apr 26, 9:29 AM CDT	Areal Flood Advisory	LOT	54 days
Apr 26, 12:13 PM CDT	Areal Flood Advisory	LOT	54 days
Apr 26, 2:00 PM CDT	Mesoscale Discussion	SPC	60 min
Apr 28, 10:28 AM CDT	River Flood Warning	LOT	11 days
Apr 29, 3:10 PM CDT	Flash Flood Watch	LOT	20 hr
Apr 30, 7:01 AM CDT	Areal Flood Advisory	LOT	53 days
May 8, 8:35 PM CDT	Mesoscale Discussion	SPC	85 min
May 13, 5:47 PM CDT	Mesoscale Discussion	SPC	88 min
May 13, 6:02 PM CDT	Tornado Watch	SPC	5 hr
May 13, 8:35 PM CDT	Mesoscale Discussion	SPC	85 min
May 13, 9:59 PM CDT	Severe Thunderstorm Warning	LOT	61 min
May 14, 3:34 PM CDT	Flash Flood Watch	LOT	30 hr
May 15, 2:48 PM CDT	Areal Flood Advisory	LOT	57 days
May 16, 3:23 AM CDT	Frost Advisory	LOT	28 hr
Jun 1, 5:37 PM CDT	Flash Flood Warning	LOT	4 hr
Jun 1, 5:57 PM CDT	Severe Thunderstorm Warning	LOT	41 min
Jun 8, 1:44 AM CDT	Flash Flood Warning	LOT	8 hr
Jun 8, 11:54 AM CDT	Mesoscale Discussion	SPC	96 min
Jun 8, 1:23 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 8, 3:53 PM CDT	Mesoscale Discussion	SPC	67 min
Jun 8, 3:57 PM CDT	Severe Thunderstorm Warning	LOT	56 min
Jun 18, 8:23 PM CDT	Mesoscale Discussion	SPC	97 min
Jun 18, 11:07 PM CDT	Mesoscale Discussion	SPC	53 min
Jun 18, 11:30 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 19, 1:27 AM CDT	Severe Thunderstorm Warning	LOT	63 min
Jun 19, 2:38 AM CDT	Mesoscale Discussion	SPC	97 min
Jun 19, 7:14 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 19, 7:49 AM CDT	Severe Thunderstorm Warning	LOT	45 min
Jun 19, 8:31 AM CDT	Severe Thunderstorm Warning	LOT	47 min
Jun 19, 8:55 AM CDT	Tornado Warning	LOT	22 min
Jun 19, 9:17 AM CDT	Flash Flood Warning	LOT	4 hr
Jun 19, 11:07 AM CDT	Severe Thunderstorm Warning	LOT	53 min
Jun 19, 1:08 PM CDT	Flash Flood Watch	LOT	8 hr
Jun 19, 1:54 PM CDT	Mesoscale Discussion	SPC	96 min
Jun 19, 2:24 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 19, 6:00 PM CDT	Flash Flood Warning	LOT	6 hr
Jun 19, 6:28 PM CDT	Severe Thunderstorm Warning	LOT	29 min
Jun 19, 6:56 PM CDT	Severe Thunderstorm Warning	LOT	43 min
Jun 19, 7:10 PM CDT	Mesoscale Discussion	SPC	95 min
Jun 19, 11:29 PM CDT	Areal Flood Warning	LOT	10 hr
Jun 21, 9:52 AM CDT	River Flood Advisory	LOT	23 hr
Jun 22, 9:02 AM CDT	River Flood Warning	LOT	5 days
Jun 22, 3:15 PM CDT	Heat Advisory	LOT	52 hr
Jun 25, 3:57 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 27, 1:19 PM CDT	Mesoscale Discussion	SPC	56 min
Jun 27, 2:41 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 27, 6:22 PM CDT	Mesoscale Discussion	SPC	113 min
Jul 5, 3:58 AM CDT	Dense Fog Advisory	LOT	5 hr
Jul 5, 3:39 PM CDT	Special Weather Statement	LOT	21 min
Jul 11, 2:31 AM CDT	Mesoscale Discussion	SPC	29 min
Jul 22, 12:49 PM CDT	Areal Flood Advisory	LOT	103 min
Jul 22, 2:06 PM CDT	Special Weather Statement	LOT	114 min
Jul 22, 2:30 PM CDT	Areal Flood Advisory	LOT	4 hr
Jul 23, 11:53 AM CDT	Mesoscale Discussion	SPC	97 min
Jul 24, 9:52 PM CDT	Wind Advisory	LOT	68 min
Jul 27, 11:05 PM CDT	High Wind Warning	LOT	3 hr
Jul 30, 4:20 PM CDT	Tornado Warning	LOT	31 min
Jul 30, 4:33 PM CDT	Tornado Warning	LOT	42 min
Jul 30, 4:51 PM CDT	Mesoscale Discussion	SPC	114 min
Jul 30, 5:12 PM CDT	Severe Thunderstorm Warning	LOT	51 min
Aug 4, 4:29 AM CDT	Dense Fog Advisory	LOT	4 hr
Aug 8, 4:07 AM CDT	Heat Advisory	LOT	38 hr
Aug 9, 10:21 AM CDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 9, 10:55 PM CDT	Mesoscale Discussion	SPC	95 min
Aug 26, 1:59 PM CDT	Flash Flood Watch	LOT	37 hr
Sep 9, 9:19 PM CDT	Dense Fog Advisory	LOT	12 hr
Sep 10, 8:44 PM CDT	Dense Fog Advisory	LOT	11 hr
Sep 12, 4:08 AM CDT	Dense Fog Advisory	LOT	5 hr
Sep 12, 9:43 PM CDT	Dense Fog Advisory	LOT	11 hr
Sep 24, 7:36 AM CDT	Dense Fog Advisory	LOT	53 min
Sep 27, 5:55 AM CDT	Dense Fog Advisory	LOT	4 hr
Sep 27, 5:32 PM CDT	Mesoscale Discussion	SPC	88 min
Sep 27, 8:22 PM CDT	Tornado Watch	SPC	3 hr
Sep 28, 4:29 AM CDT	Wind Advisory	LOT	15 hr
Oct 6, 9:09 PM CDT	Wind Advisory	LOT	5 hr
Oct 9, 4:37 AM CDT	Frost Advisory	LOT	24 hr
Oct 9, 4:00 PM CDT	Freeze Warning	LOT	41 hr
Oct 27, 4:15 AM CDT	Dense Fog Advisory	LOT	6 hr
Oct 29, 9:46 AM CDT	River Flood Advisory	LOT	3 days
Nov 1, 8:02 PM CST	River Flood Advisory	LOT	17 hr
Nov 23, 7:07 AM CST	Dense Fog Advisory	LOT	3 hr
Nov 23, 9:40 PM CST	Dense Fog Advisory	LOT	11 hr
Dec 6, 3:42 PM CST	Winter Storm Watch	LOT	30 hr
Dec 7, 9:35 PM CST	Winter Storm Warning	LOT	42 hr
Dec 7, 9:35 PM CST	Winter Weather Advisory	LOT	50 hr
Dec 8, 11:22 AM CST	Mesoscale Discussion	SPC	5 hr
Dec 9, 10:22 AM CST	Mesoscale Discussion	SPC	4 hr
Dec 9, 3:20 PM CST	Wind Chill Advisory	LOT	20 hr
Dec 12, 3:20 PM CST	Winter Weather Advisory	LOT	4 hr
Dec 12, 7:35 PM CST	Freezing Rain Advisory	LOT	14 hr
Dec 14, 3:57 AM CST	Dense Fog Advisory	LOT	9 hr
Dec 22, 11:31 AM CST	Winter Storm Watch	LOT	17 hr
Dec 22, 3:35 PM CST	Winter Weather Advisory	LOT	29 hr
Dec 23, 3:45 AM CST	Flood Watch	LOT	55 hr
Dec 23, 12:21 PM CST	Mesoscale Discussion	SPC	4 hr
Dec 23, 6:41 PM CST	Mesoscale Discussion	SPC	4 hr
Dec 23, 8:46 PM CST	Ice Storm Warning	LOT	18 hr
Dec 24, 11:25 PM CST	Areal Flood Warning	LOT	12 hr
Dec 26, 9:33 AM CST	Winter Weather Advisory	LOT	11 hr
Dec 26, 1:19 PM CST	Winter Storm Warning	LOT	8 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	12
Tornado Warning	3
Severe Thunderstorm Watch	7
Tornado Watch	2
Mesoscale Discussion	28
Special Weather Statement	2
Flooding
Areal Flood Warning	4
Flash Flood Warning	4
River Flood Warning	3
Flash Flood Watch	6
Flood Watch	1
Areal Flood Advisory	8
River Flood Advisory	3
Winter
Blizzard Warning	1
Ice Storm Warning	1
Winter Storm Warning	4
Blizzard Watch	2
Winter Storm Watch	4
Freezing Rain Advisory	1
Winter Weather Advisory	10
Heat
Heat Advisory	2
Cold
Freeze Warning	1
Wind Chill Warning	1
Wind Chill Watch	1
Frost Advisory	2
Wind Chill Advisory	3
Wind and dust
High Wind Warning	1
Wind Advisory	4
Fog and smoke
Dense Fog Advisory	15
Freezing Fog Advisory	1

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2008 2010

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.