Alert archive / Illinois / Dense Fog Advisories / 2021
Dense Fog Advisories in Illinois, June 2021
5 dense fog advisories in June 2021. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of dense fog advisories reaches back to 2005.
Dense Fog Advisories by county
Each county as a circle sized by its count in June 2021. Tap one for its archive.
- Dense Fog Advisories
- 5
- Busiest day
- June 1, 20212 dense fog advisories
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 | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 1:18 AM CDT | Dense Fog Advisory | DVN | Bureau, Hancock, Henderson, Henry, McDonough, Mercer and 3 more | 8 hr |
| Jun 1, 1:20 AM CDT | Dense Fog Advisory | ILX | Fulton, Knox, Marshall, Peoria, Stark | 6 hr |
| Jun 10, 4:51 AM CDT | Dense Fog Advisory | ILX | Clark, Clay, Coles, Crawford, Cumberland, Effingham and 5 more | 3 hr |
| Jun 11, 3:42 AM CDT | Dense Fog Advisory | ILX | Clark, Clay, Crawford, Cumberland, Effingham, Jasper and 2 more | 4 hr |
| Jun 11, 6:16 AM CDT | Dense Fog Advisory | PAH | Edwards, Franklin, Gallatin, Hamilton, Hardin, Jefferson and 7 more | 3 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Clark County2
- Clay County2
- Crawford County2
- Cumberland County2
- Effingham County2
- Jasper County2
- Lawrence County2
- Richland County2
- Bureau County1
- Hancock County1
- Henderson County1
- Henry County1
- McDonough County1
- Mercer County1
- Putnam County1
- Rock Island County1
- Warren County1
- Fulton County1
- Knox County1
- Marshall County1
- Peoria County1
- Stark County1
- Coles County1
- Moultrie County1
- Shelby County1
- Edwards County1
- Franklin County1
- Gallatin County1
- Hamilton County1
- Hardin County1
- Jefferson County1
- Johnson County1
- Pope County1
- Saline County1
- Wabash County1
- Wayne County1
- White County1
- Williamson County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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.