Alert archive / Illinois / Dense Fog Advisories

Dense Fog Advisories in Illinois, 2012

64 dense fog advisories in 2012. 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 2012. Tap one for its archive.

Dense Fog Advisories: 64
Busiest month: February18 dense fog advisories
Busiest day: February 2, 20126 dense fog advisories

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	Counties	Lasted
Jan 11, 5:55 AM CST	Dense Fog Advisory	PAH	Gallatin, Hardin, Johnson, Massac, Pope, Pulaski and 1 more	5 hr
Jan 22, 3:20 PM CST	Dense Fog Advisory	DVN	Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more	15 hr
Jan 23, 3:15 AM CST	Dense Fog Advisory	LOT	Boone, DeKalb, DuPage, Kane, Lake, LaSalle and 4 more	6 hr
Jan 26, 4:58 AM CST	Dense Fog Advisory	LOT	Boone, DeKalb, LaSalle, Lee, McHenry, Ogle and 1 more	5 hr
Jan 26, 5:01 AM CST	Dense Fog Advisory	DVN	Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more	7 hr
Feb 1, 5:24 AM CST	Dense Fog Advisory	DVN	Rock Island	8 hr
Feb 1, 7:47 AM CST	Dense Fog Advisory	PAH	Alexander, Franklin, Gallatin, Hamilton, Jackson, Johnson and 7 more	3 hr
Feb 1, 7:31 PM CST	Dense Fog Advisory	DVN	Bureau, Carroll, Henderson, Henry, Jo Daviess, McDonough and 6 more	18 hr
Feb 1, 10:14 PM CST	Dense Fog Advisory	LOT	Boone, DeKalb, DuPage, Ford, Grundy, Iroquois and 9 more	15 hr
Feb 2, 12:07 AM CST	Dense Fog Advisory	ILX	Cass, Champaign, Christian, Clark, Clay, Coles and 29 more	12 hr
Feb 2, 3:17 AM CST	Dense Fog Advisory	LSX	Bond, Clinton, Fayette, Macoupin, Madison, Marion and 1 more	5 hr
Feb 2, 4:18 AM CST	Dense Fog Advisory	PAH	Edwards, Wabash, Wayne, White	6 hr
Feb 2, 10:08 AM CST	Dense Fog Advisory	PAH	Wabash	112 min
Feb 2, 6:06 PM CST	Dense Fog Advisory	DVN	Bureau, Carroll, Henderson, Henry, Jo Daviess, Mercer and 5 more	20 hr
Feb 2, 8:43 PM CST	Dense Fog Advisory	LOT	Boone, DeKalb, DuPage, Ford, Grundy, Iroquois and 9 more	15 hr
Feb 3, 3:07 AM CST	Dense Fog Advisory	ILX	Knox, McLean, Marshall, Peoria, Stark, Tazewell and 1 more	8 hr
Feb 5, 3:55 AM CST	Dense Fog Advisory	LOT	Iroquois	8 hr
Feb 5, 11:42 PM CST	Dense Fog Advisory	LSX	Adams, Brown, Calhoun, Greene, Jersey, Macoupin and 5 more	9 hr
Feb 6, 2:45 AM CST	Dense Fog Advisory	ILX	Cass, Champaign, Christian, Clark, Clay, Coles and 23 more	9 hr
Feb 6, 2:49 AM CST	Dense Fog Advisory	LOT	Ford, Iroquois, Kankakee, Livingston	9 hr
Feb 16, 1:12 AM CST	Dense Fog Advisory	LOT	Boone, DeKalb, Ford, Grundy, Kane, Kendall and 7 more	4 hr
Feb 17, 1:00 AM CST	Dense Fog Advisory	PAH	Edwards, Franklin, Gallatin, Hamilton, Hardin, Jackson and 10 more	3 hr
Feb 23, 6:29 AM CST	Dense Fog Advisory	LOT	Boone, DeKalb, DuPage, Grundy, Kane, Kendall and 4 more	91 min
Mar 15, 11:30 PM CDT	Dense Fog Advisory	LOT	Lake, McHenry	11 hr
Mar 23, 7:22 AM CDT	Dense Fog Advisory	DVN	Hancock, Henderson, Henry, McDonough, Mercer, Rock Island and 1 more	3 hr
Mar 23, 6:38 PM CDT	Dense Fog Advisory	LOT	Boone, DeKalb, DuPage, Kane, Lake, Lee and 3 more	19 hr
Mar 24, 3:28 AM CDT	Dense Fog Advisory	DVN	Carroll, Hancock, Henderson, Henry, Jo Daviess, McDonough and 5 more	7 hr
Mar 24, 8:19 PM CDT	Dense Fog Advisory	LOT	Lake	8 hr
Apr 30, 3:09 AM CDT	Dense Fog Advisory	DVN	Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more	6 hr
May 1, 5:31 AM CDT	Dense Fog Advisory	ILX	Clark, Clay, Coles, Crawford, Cumberland, Douglas and 7 more	3 hr
May 5, 3:29 AM CDT	Dense Fog Advisory	LOT	Ford, Grundy, Iroquois, Kankakee, LaSalle, Livingston	6 hr
May 7, 10:17 PM CDT	Dense Fog Advisory	LOT	DuPage, Ford, Grundy, Iroquois, Kane, Kankakee and 4 more	8 hr
Aug 14, 12:22 AM CDT	Dense Fog Advisory	LOT	Boone, DeKalb, DuPage, Grundy, Kane, Kendall and 7 more	9 hr
Aug 14, 3:35 AM CDT	Dense Fog Advisory	ILX	Cass, DeWitt, Fulton, Knox, Logan, McLean and 11 more	5 hr
Aug 27, 12:00 AM CDT	Dense Fog Advisory	LOT	Boone, DeKalb, DuPage, Grundy, Kane, Kendall and 6 more	6 hr
Aug 27, 12:03 AM CDT	Dense Fog Advisory	DVN	Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more	10 hr
Sep 6, 4:00 AM CDT	Dense Fog Advisory	PAH	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more	5 hr
Sep 6, 4:45 AM CDT	Dense Fog Advisory	ILX	Cass, Champaign, Christian, Clark, Clay, Coles and 20 more	4 hr
Sep 14, 3:11 AM CDT	Dense Fog Advisory	ILX	Fulton, Knox, Marshall, Peoria, Schuyler, Stark	5 hr
Sep 14, 3:34 AM CDT	Dense Fog Advisory	DVN	Bureau, Carroll, Hancock, Henderson, Henry, McDonough and 6 more	4 hr
Sep 14, 4:00 AM CDT	Dense Fog Advisory	LOT	Boone, DeKalb, Kane, Kendall, LaSalle, Lee and 3 more	4 hr
Sep 17, 4:24 AM CDT	Dense Fog Advisory	ILX	Cass, Christian, DeWitt, Fulton, Knox, Logan and 16 more	8 hr
Sep 26, 2:28 AM CDT	Dense Fog Advisory	LOT	DeKalb, DuPage, Grundy, Kane, Kendall, LaSalle and 3 more	7 hr
Nov 8, 4:28 AM CST	Dense Fog Advisory	ILX	Clark, Clay, Coles, Crawford, Cumberland, Edgar and 4 more	4 hr
Nov 8, 5:44 AM CST	Dense Fog Advisory	PAH	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more	2 hr
Nov 16, 10:21 PM CST	Dense Fog Advisory	LOT	Boone, Lake, McHenry, Winnebago	11 hr
Nov 20, 1:44 AM CST	Dense Fog Advisory	DVN	Hancock, Henderson, McDonough, Mercer, Warren	10 hr
Nov 20, 4:23 PM CST	Dense Fog Advisory	DVN	Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more	21 hr
Nov 20, 5:44 PM CST	Dense Fog Advisory	LSX	Adams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more	20 hr
Nov 20, 5:52 PM CST	Dense Fog Advisory	ILX	Cass, Champaign, Christian, Clark, Clay, Coles and 29 more	20 hr
Nov 20, 6:01 PM CST	Dense Fog Advisory	LOT	Boone, DeKalb, DuPage, Ford, Grundy, Iroquois and 10 more	20 hr
Nov 21, 4:37 AM CST	Dense Fog Advisory	PAH	Alexander, Franklin, Jackson, Jefferson, Johnson, Massac and 4 more	3 hr
Nov 21, 9:59 PM CST	Dense Fog Advisory	PAH	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more	10 hr
Nov 21, 10:54 PM CST	Dense Fog Advisory	ILX	Clark, Clay, Crawford, Cumberland, Effingham, Jasper and 2 more	9 hr
Dec 1, 10:26 PM CST	Dense Fog Advisory	DVN	Hancock, Henderson, McDonough, Warren	15 hr
Dec 2, 9:36 AM CST	Dense Fog Advisory	LSX	Adams	5 hr
Dec 2, 6:25 PM CST	Dense Fog Advisory	LSX	Adams, Brown	10 hr
Dec 2, 6:56 PM CST	Dense Fog Advisory	DVN	Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more	13 hr
Dec 2, 7:01 PM CST	Dense Fog Advisory	LOT	Boone, DeKalb, DuPage, Ford, Grundy, Iroquois and 10 more	13 hr
Dec 2, 8:17 PM CST	Dense Fog Advisory	ILX	Cass, Champaign, DeWitt, Fulton, Knox, Logan and 11 more	10 hr
Dec 7, 3:24 AM CST	Dense Fog Advisory	PAH	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more	6 hr
Dec 7, 4:41 AM CST	Dense Fog Advisory	ILX	Clark, Clay, Crawford, Cumberland, Effingham, Jasper and 2 more	4 hr
Dec 24, 4:21 AM CST	Dense Fog Advisory	PAH	Alexander, Gallatin, Hardin, Massac, Pope, Pulaski	5 hr
Dec 30, 4:50 AM CST	Dense Fog Advisory	ILX	Clay, Crawford, Jasper, Lawrence, Richland	4 hr

By county

Every county with at least one alert. A county page lists each alert that covered it.

60 more counties

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record The radar archive 2011 2013

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.