Alert archive / Illinois / McHenry County / Flash Flood Warnings
Flash Flood Warnings in McHenry County, Illinois, 2017
5 flash flood warnings in 2017. An alert counts here when it covered this county. The archive of flash flood warnings reaches back to 1986.
McHenry County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Flash Flood Warnings
- 5
- Busiest month
- July4 flash flood warnings
- Busiest day
- July 12, 20173 flash flood warnings
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 |
|---|---|---|---|
| Jun 28, 9:09 PM CDT | Flash Flood Warning | LOT | 6 hr |
| Jul 11, 10:44 PM CDT | Flash Flood Warning | LOT | 16 hr |
| Jul 12, 1:29 AM CDT | Flash Flood Warning | LOT | 10 hr |
| Jul 12, 10:57 AM CDT | Flash Flood Warning | LOT | 3 hr |
| Jul 21, 8:33 PM CDT | Flash Flood Warning | LOT | 6 hr |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.