Alert archive / Illinois / Dense Fog Advisories / 2011
Dense Fog Advisories in Illinois, May 2011
7 dense fog advisories in May 2011. 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 May 2011. Tap one for its archive.
- Dense Fog Advisories
- 7
- Busiest day
- May 19, 20112 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 |
|---|---|---|---|---|
| May 8, 6:20 AM CDT | Dense Fog Advisory | ILX | Champaign, Christian, Clark, Clay, Coles, Crawford and 16 more | 4 hr |
| May 19, 5:20 AM CDT | Dense Fog Advisory | LOT | Ford, Grundy, Iroquois, Kankakee, LaSalle, Livingston | 5 hr |
| May 19, 5:24 AM CDT | Dense Fog Advisory | ILX | Champaign, Coles, DeWitt, Douglas, Edgar, McLean and 6 more | 3 hr |
| May 19, 8:26 PM CDT | Dense Fog Advisory | LOT | Lake | 14 hr |
| May 20, 11:54 PM CDT | Dense Fog Advisory | LOT | Lake | 6 hr |
| May 29, 2:10 AM CDT | Dense Fog Advisory | LOT | Boone, DeKalb, DuPage, Kane, Lake, Lee and 3 more | 7 hr |
| May 29, 5:05 AM CDT | Dense Fog Advisory | DVN | Bureau, Carroll, Henderson, Henry, Jo Daviess, Mercer and 5 more | 4 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Lake County3
- Champaign County2
- Coles County2
- DeWitt County2
- Douglas County2
- Edgar County2
- McLean County2
- Macon County2
- Moultrie County2
- Piatt County2
- Vermilion County2
- Christian County1
- Clark County1
- Clay County1
- Crawford County1
- Cumberland County1
- Effingham County1
- Jasper County1
- Lawrence County1
- Logan County1
- Richland County1
- Sangamon County1
- Shelby County1
- Ford County1
- Grundy County1
- Iroquois County1
- Kankakee County1
- LaSalle County1
- Livingston County1
- Marshall County1
- Woodford County1
- Boone County1
- DeKalb County1
- DuPage County1
- Kane County1
- Lee County1
- McHenry County1
- Ogle County1
- Winnebago County1
- Bureau County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20102012
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.