Dense Fog Advisories in Iowa, 2012

Dense Fog Advisories by county

Each county as a circle sized by its count in 2012. Tap one for its archive.

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 22, 3:20 PM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	15 hr
Jan 22, 3:40 PM CST	Dense Fog Advisory	DMX	Adair, Adams, Appanoose, Clarke, Davis, Decatur and 11 more	8 hr
Jan 25, 8:27 AM CST	Dense Fog Advisory	FSD	Lyon, Plymouth, Sioux, Woodbury	4 hr
Jan 26, 5:01 AM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	7 hr
Jan 26, 5:49 AM CST	Dense Fog Advisory	DMX	Appanoose, Black Hawk, Bremer, Butler, Clarke, Davis and 15 more	5 hr
Jan 26, 5:53 AM CST	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 1 more	4 hr
Feb 1, 5:24 AM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 7 more	8 hr
Feb 1, 5:27 AM CST	Dense Fog Advisory	DMX	Black Hawk, Bremer, Butler, Cerro Gordo, Franklin, Grundy and 12 more	8 hr
Feb 1, 5:29 AM CST	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	10 hr
Feb 1, 7:31 PM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 13 more	18 hr
Feb 1, 7:37 PM CST	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	40 hr
Feb 1, 7:38 PM CST	Dense Fog Advisory	DMX	Black Hawk, Bremer, Butler, Cerro Gordo, Franklin, Grundy and 14 more	16 hr
Feb 2, 12:00 PM CST	Dense Fog Advisory	DMX	Black Hawk, Bremer	118 min
Feb 2, 1:52 PM CST	Dense Fog Advisory	ARX	Floyd, Mitchell	22 hr
Feb 2, 3:41 PM CST	Dense Fog Advisory	DMX	Black Hawk, Bremer, Butler, Cerro Gordo, Davis, Franklin and 13 more	14 hr
Feb 2, 6:06 PM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 13 more	20 hr
Feb 3, 12:42 AM CST	Dense Fog Advisory	FSD	Clay, Dickinson, Osceola	27 hr
Feb 5, 7:21 PM CST	Dense Fog Advisory	OAX	Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more	17 hr
Feb 5, 11:52 PM CST	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	11 hr
Feb 6, 10:05 AM CST	Dense Fog Advisory	DMX	Adair, Adams, Audubon, Boone, Calhoun, Carroll and 18 more	115 min
Feb 13, 8:59 PM CST	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	13 hr
Feb 13, 10:00 PM CST	Dense Fog Advisory	OAX	Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more	12 hr
Mar 15, 5:21 AM CDT	Dense Fog Advisory	ARX	Allamakee, Clayton, Fayette	6 hr
Mar 16, 5:24 AM CDT	Dense Fog Advisory	OAX	Harrison, Monona, Montgomery, Page, Pottawattamie, Shelby	6 hr
Mar 16, 5:35 AM CDT	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	5 hr
Mar 16, 6:50 AM CDT	Dense Fog Advisory	DMX	Adair, Adams, Audubon, Calhoun, Carroll, Cass and 9 more	3 hr
Mar 23, 1:28 AM CDT	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Lyon, O'Brien and 3 more	9 hr
Mar 23, 3:52 AM CDT	Dense Fog Advisory	DMX	Black Hawk, Boone, Bremer, Butler, Calhoun, Carroll and 22 more	6 hr
Mar 23, 7:22 AM CDT	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Des Moines, Henry, Iowa and 10 more	3 hr
Mar 24, 3:28 AM CDT	Dense Fog Advisory	DVN	Cedar, Clinton, Des Moines, Dubuque, Henry, Jackson and 5 more	7 hr
Mar 25, 3:30 AM CDT	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Delaware, Des Moines, Dubuque and 12 more	5 hr
Mar 25, 3:35 AM CDT	Dense Fog Advisory	ARX	Allamakee, Clayton, Fayette	6 hr
Mar 30, 4:42 AM CDT	Dense Fog Advisory	FSD	Cherokee, Lyon, O'Brien, Osceola, Plymouth, Sioux	7 hr
Apr 1, 3:22 AM CDT	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 3 more	7 hr
Apr 1, 3:42 AM CDT	Dense Fog Advisory	DMX	Calhoun, Carroll, Crawford, Emmet, Humboldt, Kossuth and 4 more	4 hr
Apr 14, 3:53 AM CDT	Dense Fog Advisory	DMX	Adair, Adams, Audubon, Boone, Calhoun, Carroll and 22 more	5 hr
Apr 30, 3:09 AM CDT	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	6 hr
Apr 30, 3:22 AM CDT	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	6 hr
Apr 30, 3:27 AM CDT	Dense Fog Advisory	DMX	Appanoose, Black Hawk, Bremer, Butler, Cerro Gordo, Clarke and 21 more	5 hr
Aug 26, 2:25 AM CDT	Dense Fog Advisory	FSD	Lyon, Plymouth, Sioux, Woodbury	9 hr
Aug 26, 3:05 AM CDT	Dense Fog Advisory	OAX	Harrison, Monona	6 hr
Aug 27, 12:03 AM CDT	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	10 hr
Aug 27, 12:06 AM CDT	Dense Fog Advisory	ARX	Allamakee, Clayton, Fayette, Winneshiek	8 hr
Aug 27, 3:38 AM CDT	Dense Fog Advisory	DMX	Appanoose, Black Hawk, Boone, Carroll, Clarke, Crawford and 21 more	5 hr
Aug 27, 5:28 AM CDT	Dense Fog Advisory	OAX	Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more	4 hr
Sep 4, 4:39 AM CDT	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	4 hr
Sep 14, 3:34 AM CDT	Dense Fog Advisory	DVN	Clinton, Des Moines, Henry, Lee, Louisa, Muscatine and 1 more	4 hr
Oct 23, 5:35 AM CDT	Dense Fog Advisory	FSD	Dickinson, Lyon, Osceola	6 hr
Oct 23, 3:03 PM CDT	Dense Fog Advisory	ARX	Chickasaw, Floyd, Howard, Mitchell, Winneshiek	18 hr
Oct 23, 9:23 PM CDT	Dense Fog Advisory	DMX	Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 24 more	13 hr
Oct 23, 9:25 PM CDT	Dense Fog Advisory	OAX	Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more	10 hr
Oct 23, 9:40 PM CDT	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	6 hr
Nov 20, 12:13 AM CST	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	12 hr
Nov 20, 12:24 AM CST	Dense Fog Advisory	DMX	Appanoose, Black Hawk, Bremer, Butler, Cerro Gordo, Davis and 13 more	10 hr
Nov 20, 1:44 AM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Delaware, Des Moines, Dubuque and 12 more	10 hr
Nov 20, 4:23 PM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	21 hr
Nov 20, 5:45 PM CST	Dense Fog Advisory	ARX	Allamakee, Clayton, Fayette, Winneshiek	18 hr
Nov 20, 7:26 PM CST	Dense Fog Advisory	DMX	Appanoose, Black Hawk, Bremer, Butler, Davis, Grundy and 8 more	12 hr
Dec 1, 3:30 AM CST	Dense Fog Advisory	OAX	Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more	9 hr
Dec 1, 7:39 PM CST	Dense Fog Advisory	OAX	Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more	13 hr
Dec 1, 8:46 PM CST	Dense Fog Advisory	DMX	Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 45 more	17 hr
Dec 1, 8:49 PM CST	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, O'Brien and 3 more	7 hr
Dec 1, 8:57 PM CST	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	17 hr
Dec 1, 10:26 PM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Delaware, Des Moines, Dubuque, Henry and 9 more	15 hr
Dec 2, 8:50 AM CST	Dense Fog Advisory	OAX	Fremont, Mills, Montgomery, Page	2 hr
Dec 2, 5:57 PM CST	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	15 hr
Dec 2, 6:56 PM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	13 hr
Dec 2, 9:57 PM CST	Dense Fog Advisory	DMX	Adair, Adams, Appanoose, Cass, Clarke, Davis and 12 more	7 hr
Dec 3, 5:50 AM CST	Dense Fog Advisory	OAX	Harrison, Monona, Pottawattamie	4 hr
Dec 15, 8:39 PM CST	Dense Fog Advisory	ARX	Allamakee	6 hr

By county

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

59 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.