Alert archive / Illinois / McHenry County
Weather alerts in McHenry County, Illinois, 2023
108 weather alerts in 2023, 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 2023. Tap one for its archive.
- Alerts
- 108
- Warnings
- 32
- Watches
- 18
- Advisories
- 28
- Busiest month
- April33 alerts
- Busiest day
- April 4, 20238 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 1, 5:16 PM CST | Dense Fog Advisory | LOT | 16 hr |
| Jan 3, 9:35 AM CST | Dense Fog Advisory | LOT | 16 hr |
| Jan 24, 1:57 AM CST | Winter Weather Advisory | LOT | 52 hr |
| Jan 27, 2:28 PM CST | Winter Weather Advisory | LOT | 40 hr |
| Jan 28, 12:25 PM CST | Winter Storm Warning | LOT | 14 hr |
| Feb 2, 2:53 AM CST | Wind Chill Advisory | LOT | 31 hr |
| Feb 14, 4:03 AM CST | Wind Advisory | LOT | 34 hr |
| Feb 14, 1:54 PM CST | Winter Storm Watch | LOT | 24 hr |
| Feb 15, 2:13 PM CST | Winter Storm Warning | LOT | 34 hr |
| Feb 16, 8:02 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 21, 3:00 PM CST | Winter Weather Advisory | LOT | 36 hr |
| Feb 22, 2:04 AM CST | Ice Storm Warning | LOT | 25 hr |
| Feb 22, 8:46 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 22, 3:27 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Mar 2, 11:04 AM CST | River Flood Watch | LOT | 47 hr |
| Mar 4, 10:24 PM CST | Dense Fog Advisory | LOT | 11 hr |
| Mar 8, 3:20 AM CST | Winter Storm Watch | LOT | 12 hr |
| Mar 8, 2:54 PM CST | Winter Weather Advisory | LOT | 40 hr |
| Mar 24, 3:08 AM CDT | Winter Weather Advisory | LOT | 30 hr |
| Mar 24, 2:09 PM CDT | Winter Storm Warning | LOT | 22 hr |
| Mar 25, 3:47 AM CDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 31, 3:06 AM CDT | Wind Advisory | LOT | 37 hr |
| Mar 31, 2:07 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Mar 31, 2:36 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 31, 3:50 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Mar 31, 7:23 PM CDT | Tornado Warning | LOT | 43 min |
| Mar 31, 7:52 PM CDT | Severe Thunderstorm Warning | LOT | 68 min |
| Mar 31, 7:54 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 4, 8:00 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 4, 10:36 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 4, 12:38 PM CDT | Severe Thunderstorm Warning | LOT | 52 min |
| Apr 4, 12:53 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Apr 4, 1:01 PM CDT | Severe Thunderstorm Warning | LOT | 89 min |
| Apr 4, 1:44 PM CDT | Severe Thunderstorm Warning | LOT | 46 min |
| Apr 4, 2:10 PM CDT | Severe Thunderstorm Warning | LOT | 50 min |
| Apr 4, 5:46 PM CDT | River Flood Warning | LOT | 14 hr |
| Apr 5, 2:10 AM CDT | Special Weather Statement | LOT | 20 min |
| Apr 5, 3:57 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Apr 5, 6:03 AM CDT | Severe Thunderstorm Warning | LOT | 57 min |
| Apr 11, 3:19 AM CDT | Fire Weather Watch | LOT | 23 hr |
| Apr 12, 2:40 AM CDT | Red Flag Warning | LOT | 16 hr |
| Apr 15, 3:11 PM CDT | Freeze Watch | LOT | 13 hr |
| Apr 15, 10:19 PM CDT | Special Weather Statement | LOT | 56 min |
| Apr 15, 10:34 PM CDT | Severe Thunderstorm Warning | LOT | 38 min |
| Apr 17, 2:43 PM CDT | Freeze Warning | LOT | 17 hr |
| Apr 19, 2:42 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 19, 4:22 PM CDT | Severe Thunderstorm Warning | LOT | 17 min |
| Apr 20, 1:50 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Apr 20, 2:06 PM CDT | Tornado Watch | SPC | 6 hr |
| Apr 20, 3:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Apr 20, 5:02 PM CDT | Severe Thunderstorm Warning | LOT | 31 min |
| Apr 20, 5:23 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Apr 20, 5:40 PM CDT | Severe Thunderstorm Warning | LOT | 50 min |
| Apr 22, 1:56 PM CDT | Freeze Watch | LOT | 13 hr |
| Apr 23, 2:56 AM CDT | Freeze Warning | LOT | 29 hr |
| Apr 24, 2:30 PM CDT | Freeze Watch | LOT | 23 hr |
| Apr 25, 1:41 PM CDT | Freeze Warning | LOT | 18 hr |
| Apr 26, 2:28 PM CDT | Frost Advisory | LOT | 17 hr |
| May 31, 4:16 PM CDT | Special Weather Statement | LOT | 29 min |
| Jun 24, 11:12 PM CDT | Severe Thunderstorm Warning | LOT | 33 min |
| Jun 24, 11:41 PM CDT | Special Weather Statement | LOT | 64 min |
| Jul 5, 12:49 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jul 12, 3:05 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jul 12, 3:53 PM CDT | Tornado Watch | SPC | 5 hr |
| Jul 12, 6:13 PM CDT | Tornado Warning | LOT | 32 min |
| Jul 13, 6:45 PM CDT | Tornado Warning | LOT | 45 min |
| Jul 13, 7:04 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jul 13, 7:34 PM CDT | Tornado Warning | LOT | 26 min |
| Jul 14, 2:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 3:52 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 14, 8:23 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jul 17, 12:13 AM CDT | Special Weather Statement | LOT | 17 min |
| Jul 22, 10:16 PM CDT | Special Weather Statement | LOT | 44 min |
| Jul 26, 3:50 AM CDT | Heat Advisory | LOT | 65 hr |
| Jul 26, 7:30 AM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 26, 8:04 AM CDT | Severe Thunderstorm Warning | LOT | 41 min |
| Jul 26, 8:41 AM CDT | Severe Thunderstorm Warning | LOT | 64 min |
| Jul 28, 2:52 AM CDT | Mesoscale Discussion | SPC | 113 min |
| Jul 28, 7:21 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 28, 7:30 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 28, 7:36 PM CDT | Flood Watch | LOT | 5 hr |
| Jul 28, 8:41 PM CDT | Areal Flood Advisory | LOT | 4 hr |
| Jul 28, 9:17 PM CDT | Severe Thunderstorm Warning | LOT | 43 min |
| Jul 28, 9:55 PM CDT | Severe Thunderstorm Warning | LOT | 50 min |
| Aug 3, 4:18 AM CDT | Dense Fog Advisory | LOT | 5 hr |
| Aug 9, 3:46 AM CDT | Dense Fog Advisory | LOT | 4 hr |
| Aug 10, 1:04 AM CDT | Dense Fog Advisory | LOT | 8 hr |
| Aug 11, 11:23 PM CDT | Severe Thunderstorm Warning | LOT | 38 min |
| Aug 14, 3:20 AM CDT | Flood Watch | LOT | 18 hr |
| Aug 17, 4:41 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 17, 5:22 AM CDT | Severe Thunderstorm Warning | LOT | 23 min |
| Aug 19, 2:47 AM CDT | Heat Advisory | LOT | 41 hr |
| Aug 21, 2:47 AM CDT | Excessive Heat Watch | LOT | 48 hr |
| Aug 22, 2:59 AM CDT | Excessive Heat Warning | LOT | 65 hr |
| Aug 24, 2:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Aug 24, 5:06 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 24, 8:08 PM CDT | Special Weather Statement | LOT | 37 min |
| Sep 20, 5:39 AM CDT | Areal Flood Advisory | LOT | 5 hr |
| Sep 29, 1:34 AM CDT | Dense Fog Advisory | LOT | 7 hr |
| Oct 8, 1:47 PM CDT | Frost Advisory | LOT | 19 hr |
| Oct 9, 2:04 PM CDT | Frost Advisory | LOT | 18 hr |
| Oct 10, 2:18 PM CDT | Frost Advisory | LOT | 18 hr |
| Oct 29, 3:24 AM CDT | Freeze Warning | LOT | 30 hr |
| Nov 25, 2:10 PM CST | Winter Weather Advisory | LOT | 22 hr |
| Dec 22, 11:35 PM CST | Dense Fog Advisory | LOT | 12 hr |
| Dec 23, 3:29 PM CST | Dense Fog Advisory | LOT | 21 hr |
| Dec 30, 6:56 AM CST | Dense Fog Advisory | LOT | 5 hr |
| Dec 30, 6:15 PM CST | Winter Weather Advisory | LOT | 17 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20222024
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.