Alert archive / Illinois / McHenry County / 2026
Weather alerts in McHenry County, Illinois, March 2026
16 weather alerts in March 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
- Alerts
- 16
- Warnings
- 3
- Watches
- 3
- Advisories
- 5
- Busiest day
- March 31, 20265 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 |
|---|---|---|---|
| Mar 4, 1:39 AM CST | Dense Fog Advisory | LOT | 7 hr |
| Mar 4, 8:34 PM CST | Dense Fog Advisory | LOT | 37 hr |
| Mar 10, 2:41 AM CDT | Dense Fog Advisory | LOT | 8 hr |
| Mar 10, 4:53 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Mar 10, 5:40 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 10, 7:21 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Mar 12, 1:33 AM CDT | High Wind Watch | LOT | 10 hr |
| Mar 12, 1:33 AM CDT | Wind Advisory | LOT | 40 hr |
| Mar 12, 11:28 AM CDT | High Wind Warning | LOT | 29 hr |
| Mar 15, 9:27 AM CDT | Winter Weather Advisory | LOT | 39 hr |
| Mar 15, 6:51 PM CDT | Blizzard Warning | LOT | 16 hr |
| Mar 30, 8:57 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 30, 9:21 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Mar 30, 10:42 PM CDT | Severe Thunderstorm Warning | LOT | 26 min |
| Mar 30, 11:29 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 31, 1:54 AM 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 | 1 |
| Severe Thunderstorm Watch | 2 |
| Mesoscale Discussion | 5 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Weather Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
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.