Alert archive / Illinois / McHenry County / 2024
Weather alerts in McHenry County, Illinois, August 2024
18 weather alerts in August 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
- Alerts
- 18
- Warnings
- 4
- Watches
- 4
- Advisories
- 2
- Busiest day
- August 27, 20247 alerts
Over time
By day
Days in UTC, the clock the archive keeps.
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 |
|---|---|---|---|
| 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 | LOT | 73 min |
| Aug 27, 6:24 PM CDT | Mesoscale Discussion | SPC | 96 min |
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 | 3 |
| Severe Thunderstorm Watch | 3 |
| Mesoscale Discussion | 7 |
| Special Weather Statement | 1 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20232025
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. Warning verification from the Mesonet's Cow. Rebuilt daily.