Alert archive / Illinois / Dense Fog Advisories / 2018
Dense Fog Advisories in Illinois, August 2018
13 dense fog advisories in August 2018. 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 August 2018. Tap one for its archive.
- Dense Fog Advisories
- 13
- Busiest day
- August 16, 20183 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 |
|---|---|---|---|---|
| Aug 1, 3:34 AM CDT | Dense Fog Advisory | ILX | Christian, Clark, Clay, Coles, Crawford, Cumberland and 11 more | 5 hr |
| Aug 1, 6:39 AM CDT | Dense Fog Advisory | PAH | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 11 more | 2 hr |
| Aug 3, 5:40 AM CDT | Dense Fog Advisory | LOT | Boone, McHenry, Winnebago | 2 hr |
| Aug 8, 4:07 AM CDT | Dense Fog Advisory | DVN | Henry, Rock Island | 5 hr |
| Aug 10, 3:10 AM CDT | Dense Fog Advisory | LOT | Boone, DeKalb, DuPage, Kane, Lee, McHenry and 2 more | 6 hr |
| Aug 16, 3:00 AM CDT | Dense Fog Advisory | DVN | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 6 hr |
| Aug 16, 3:17 AM CDT | Dense Fog Advisory | LOT | Boone, DeKalb, LaSalle, Lee, Ogle, Winnebago | 6 hr |
| Aug 16, 3:20 AM CDT | Dense Fog Advisory | ILX | Cass, Fulton, Knox, Marshall, Mason, Menard and 5 more | 6 hr |
| Aug 17, 6:41 AM CDT | Dense Fog Advisory | DVN | Rock Island | 2 hr |
| Aug 19, 4:21 AM CDT | Dense Fog Advisory | LOT | Boone, DeKalb, Ford, Grundy, Iroquois, Kane and 8 more | 5 hr |
| Aug 25, 4:03 AM CDT | Dense Fog Advisory | DVN | Jo Daviess | 6 hr |
| Aug 26, 3:03 AM CDT | Dense Fog Advisory | DVN | Bureau, Carroll, Jo Daviess, Putnam, Stephenson, Whiteside | 5 hr |
| Aug 26, 3:07 AM CDT | Dense Fog Advisory | LOT | Boone, DeKalb, DuPage, Grundy, Kane, Kendall and 6 more | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Boone County5
- Winnebago County5
- McHenry County4
- DeKalb County4
- Lee County4
- Ogle County4
- Rock Island County3
- Kane County3
- Jo Daviess County3
- LaSalle County3
- Henry County2
- DuPage County2
- Bureau County2
- Carroll County2
- Putnam County2
- Stephenson County2
- Whiteside County2
- Grundy County2
- Kendall County2
- Christian County1
- Clark County1
- Clay County1
- Coles County1
- Crawford County1
- Cumberland County1
- Douglas County1
- Edgar County1
- Effingham County1
- Jasper County1
- Lawrence County1
- Morgan County1
- Moultrie County1
- Richland County1
- Sangamon County1
- Shelby County1
- Vermilion County1
- Alexander County1
- Edwards County1
- Franklin County1
- Gallatin County1
34 more counties
- Hamilton County1
- Hardin County1
- Jefferson County1
- Johnson County1
- Massac County1
- Pope County1
- Pulaski County1
- Saline County1
- Union County1
- Wabash County1
- Wayne County1
- White County1
- Williamson County1
- Hancock County1
- Henderson County1
- McDonough County1
- Mercer County1
- Warren County1
- Cass County1
- Fulton County1
- Knox County1
- Marshall County1
- Mason County1
- Menard County1
- Peoria County1
- Schuyler County1
- Stark County1
- Tazewell County1
- Woodford County1
- Ford County1
- Iroquois County1
- Kankakee County1
- Livingston County1
- Lake County1
Nearby
Alerts in force nowTornadoes on recordThe 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. Warning verification from the Mesonet's Cow. Rebuilt daily.