Alert archive / Illinois / McHenry County / 2026
Weather alerts in McHenry County, Illinois, July 2026
16 weather alerts in July 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
- Alerts
- 16
- Warnings
- 5
- Watches
- 2
- Advisories
- 2
- Busiest day
- July 27, 20266 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 |
|---|---|---|---|
| Jul 1, 2:34 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jul 2, 2:30 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 2, 7:40 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 11:15 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 11:52 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 3, 5:05 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jul 3, 6:37 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 3, 7:33 PM CDT | Severe Thunderstorm Warning | LOT | 30 min |
| Jul 3, 8:33 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jul 4, 1:53 PM CDT | Severe Thunderstorm Warning | LOT | 40 min |
| Jul 27, 2:10 AM CDT | Heat Advisory | LOT | 14 hr |
| Jul 27, 2:10 AM CDT | Extreme Heat Warning | LOT | 19 hr |
| Jul 27, 3:02 AM CDT | Dense Fog Advisory | LOT | 5 hr |
| Jul 27, 9:40 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 27, 10:57 AM CDT | Severe Thunderstorm Warning | LOT | 78 min |
| Jul 27, 11:25 AM CDT | Severe Thunderstorm Warning | LOT | 80 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 | 4 |
| Severe Thunderstorm Watch | 2 |
| Mesoscale Discussion | 7 |
| Heat | |
| Extreme Heat Warning | 1 |
| Heat Advisory | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive2025
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.