Alert archive / Illinois / McHenry County / 2018
Weather alerts in McHenry County, Illinois, September 2018
22 weather alerts in September 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
- Alerts
- 22
- Warnings
- 4
- Watches
- 4
- Advisories
- 7
- Busiest day
- September 3, 20188 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 |
|---|---|---|---|
| Sep 1, 3:07 PM CDT | Flash Flood Watch | LOT | 13 hr |
| Sep 2, 12:34 AM CDT | Areal Flood Advisory | LOT | 3 hr |
| Sep 2, 12:48 AM CDT | Special Weather Statement | LOT | 42 min |
| Sep 2, 2:14 AM CDT | Special Weather Statement | LOT | 31 min |
| Sep 2, 2:38 PM CDT | Flash Flood Watch | LOT | 16 hr |
| Sep 2, 3:47 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Sep 2, 7:02 PM CDT | Areal Flood Advisory | LOT | 6 hr |
| Sep 3, 1:00 AM CDT | Areal Flood Advisory | LOT | 10 hr |
| Sep 3, 8:42 AM CDT | River Flood Warning | LOT | 7 days |
| Sep 3, 12:38 PM CDT | Areal Flood Advisory | LOT | 52 min |
| Sep 3, 12:58 PM CDT | Flash Flood Watch | LOT | 11 hr |
| Sep 3, 1:20 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 3, 1:35 PM CDT | Special Weather Statement | LOT | 40 min |
| Sep 3, 1:39 PM CDT | Tornado Warning | LOT | 25 min |
| Sep 11, 4:36 AM CDT | Dense Fog Advisory | LOT | 4 hr |
| Sep 20, 3:16 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Sep 25, 1:36 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 25, 3:39 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Sep 25, 4:01 PM CDT | Severe Thunderstorm Warning | LOT | 59 min |
| Sep 25, 4:52 PM CDT | Severe Thunderstorm Warning | LOT | 68 min |
| Sep 28, 3:31 AM CDT | Frost Advisory | LOT | 7 hr |
| Sep 28, 3:31 AM CDT | Frost Advisory | LOT | 28 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 | 2 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 1 |
| Mesoscale Discussion | 4 |
| Special Weather Statement | 3 |
| Flooding | |
| River Flood Warning | 1 |
| Flash Flood Watch | 3 |
| Areal Flood Advisory | 4 |
| Cold | |
| Frost Advisory | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20172019
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.