Dense Fog Advisories in Iowa, 2017

Dense Fog Advisories by county

Each county as a circle sized by its count in 2017. 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 2, 1:41 PM CST	Dense Fog Advisory	OAX	Fremont, Mills, Montgomery, Page	8 hr
Jan 2, 4:31 PM CST	Dense Fog Advisory	DVN	Benton, Cedar, Clinton, Des Moines, Dubuque, Henry and 13 more	15 hr
Jan 2, 6:56 PM CST	Dense Fog Advisory	DMX	Adair, Adams, Appanoose, Cass, Clarke, Davis and 12 more	3 hr
Jan 2, 9:54 PM CST	Dense Fog Advisory	DMX	Appanoose, Davis, Jasper, Lucas, Mahaska, Marion and 6 more	4 hr
Jan 16, 3:59 PM CST	Dense Fog Advisory	DMX	Adair, Adams, Appanoose, Black Hawk, Cass, Clarke and 19 more	13 hr
Jan 16, 4:30 PM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	14 hr
Jan 18, 9:28 PM CST	Dense Fog Advisory	DMX	Adair, Adams, Appanoose, Black Hawk, Boone, Bremer and 37 more	15 hr
Jan 19, 1:27 AM CST	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	11 hr
Jan 19, 1:46 AM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Delaware, Dubuque, Iowa, Jefferson and 5 more	10 hr
Jan 19, 3:15 PM CST	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	15 hr
Jan 19, 3:26 PM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	21 hr
Jan 19, 3:28 PM CST	Dense Fog Advisory	DMX	Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 45 more	21 hr
Jan 19, 3:28 PM CST	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	46 hr
Jan 19, 3:39 PM CST	Dense Fog Advisory	OAX	Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more	17 hr
Jan 20, 3:09 PM CST	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	45 hr
Jan 20, 3:14 PM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	21 hr
Jan 20, 3:31 PM CST	Dense Fog Advisory	DMX	Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 45 more	20 hr
Jan 20, 6:27 PM CST	Dense Fog Advisory	OAX	Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more	17 hr
Jan 21, 3:50 PM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	19 hr
Jan 21, 3:53 PM CST	Dense Fog Advisory	DMX	Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 38 more	20 hr
Jan 21, 9:34 PM CST	Dense Fog Advisory	OAX	Montgomery, Page, Pottawattamie, Shelby	7 hr
Jan 25, 5:04 AM CST	Dense Fog Advisory	DMX	Appanoose, Clarke, Davis, Decatur, Lucas, Madison and 8 more	3 hr
Feb 6, 9:10 PM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	15 hr
Feb 7, 2:21 AM CST	Dense Fog Advisory	DMX	Appanoose, Black Hawk, Clarke, Davis, Decatur, Grundy and 15 more	7 hr
Feb 7, 4:57 AM CST	Dense Fog Advisory	ARX	Clayton, Fayette	7 hr
Feb 19, 1:42 AM CST	Dense Fog Advisory	DMX	Black Hawk, Boone, Bremer, Butler, Calhoun, Cerro Gordo and 18 more	7 hr
Feb 19, 1:56 AM CST	Dense Fog Advisory	ARX	Chickasaw, Floyd, Howard, Mitchell	5 hr
Feb 21, 7:07 AM CST	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	3 hr
Feb 21, 10:04 AM CST	Dense Fog Advisory	ARX	Chickasaw, Fayette, Floyd, Howard, Mitchell, Winneshiek	56 min
Feb 22, 12:26 AM CST	Dense Fog Advisory	DVN	Cedar, Clinton, Delaware, Des Moines, Dubuque, Henry and 9 more	10 hr
Feb 28, 7:09 PM CST	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 1 more	5 hr
Mar 25, 10:57 PM CDT	Dense Fog Advisory	DMX	Appanoose, Davis, Jasper, Lucas, Mahaska, Marion and 4 more	10 hr
Mar 26, 5:22 AM CDT	Dense Fog Advisory	DVN	Cedar, Clinton, Dubuque, Henry, Iowa, Jackson and 10 more	7 hr
Apr 3, 1:32 AM CDT	Dense Fog Advisory	OAX	Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more	9 hr
Apr 3, 1:52 AM CDT	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	10 hr
Apr 3, 1:53 AM CDT	Dense Fog Advisory	DMX	Calhoun, Carroll, Crawford, Emmet, Kossuth, Palo Alto and 2 more	8 hr
Apr 13, 4:45 AM CDT	Dense Fog Advisory	FSD	Dickinson, Osceola	5 hr
May 11, 4:56 AM CDT	Dense Fog Advisory	ARX	Allamakee, Clayton, Fayette, Winneshiek	4 hr
May 27, 1:53 AM CDT	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	8 hr
May 27, 4:12 AM CDT	Dense Fog Advisory	DMX	Black Hawk, Bremer, Butler, Grundy, Hardin, Jasper and 11 more	6 hr
May 27, 5:27 AM CDT	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 1 more	5 hr
Aug 7, 2:47 AM CDT	Dense Fog Advisory	OAX	Fremont, Page	3 hr
Aug 14, 3:52 AM CDT	Dense Fog Advisory	FSD	Lyon	6 hr
Aug 15, 3:10 AM CDT	Dense Fog Advisory	DMX	Black Hawk, Bremer, Butler, Cerro Gordo, Emmet, Franklin and 8 more	6 hr
Aug 15, 4:24 AM CDT	Dense Fog Advisory	FSD	Dickinson	5 hr
Aug 15, 4:53 AM CDT	Dense Fog Advisory	ARX	Chickasaw, Floyd, Mitchell	3 hr
Aug 27, 2:37 AM CDT	Dense Fog Advisory	DMX	Calhoun, Carroll, Cerro Gordo, Crawford, Hancock, Humboldt and 8 more	5 hr
Aug 28, 2:18 AM CDT	Dense Fog Advisory	DVN	Cedar, Clinton, Des Moines, Dubuque, Henry, Iowa and 12 more	9 hr
Aug 28, 2:57 AM CDT	Dense Fog Advisory	DMX	Appanoose, Davis, Mahaska, Monroe, Wapello	6 hr
Aug 29, 2:41 AM CDT	Dense Fog Advisory	DVN	Cedar, Clinton, Delaware, Des Moines, Dubuque, Jackson and 5 more	8 hr
Aug 29, 5:04 AM CDT	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, O'Brien and 1 more	4 hr
Aug 30, 4:31 AM CDT	Dense Fog Advisory	DMX	Black Hawk, Bremer, Butler, Cerro Gordo, Franklin, Grundy and 9 more	8 min
Aug 30, 4:39 AM CDT	Dense Fog Advisory	DMX	Black Hawk, Bremer, Butler, Cerro Gordo, Franklin, Grundy and 9 more	4 hr
Aug 30, 4:51 AM CDT	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	4 hr
Aug 30, 4:52 AM CDT	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 9 more	4 hr
Aug 31, 5:06 AM CDT	Dense Fog Advisory	FSD	Dickinson, Osceola	5 hr
Sep 3, 5:41 AM CDT	Dense Fog Advisory	DMX	Adams, Appanoose, Audubon, Cass, Clarke, Davis and 8 more	3 hr
Sep 3, 5:44 AM CDT	Dense Fog Advisory	OAX	Fremont, Harrison, Mills, Montgomery, Page, Pottawattamie and 1 more	4 hr
Sep 18, 9:56 PM CDT	Dense Fog Advisory	DMX	Appanoose, Black Hawk, Boone, Bremer, Butler, Cerro Gordo and 27 more	12 hr
Sep 19, 12:50 AM CDT	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Des Moines, Henry and 13 more	9 hr
Oct 13, 10:10 PM CDT	Dense Fog Advisory	ARX	Howard, Winneshiek	7 hr
Nov 1, 9:53 PM CDT	Dense Fog Advisory	DMX	Appanoose, Black Hawk, Clarke, Davis, Decatur, Grundy and 14 more	11 hr
Nov 2, 1:31 AM CDT	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	9 hr
Nov 2, 5:27 AM CDT	Dense Fog Advisory	ARX	Clayton, Fayette	7 hr
Nov 4, 11:19 PM CDT	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	8 hr
Nov 12, 9:36 PM CST	Dense Fog Advisory	DMX	Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 36 more	14 hr
Nov 12, 9:39 PM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 13 more	14 hr
Nov 12, 9:43 PM CST	Dense Fog Advisory	ARX	Allamakee, Clayton, Fayette	12 hr
Nov 13, 2:39 AM CST	Dense Fog Advisory	OAX	Fremont, Harrison, Mills, Montgomery, Page, Pottawattamie and 1 more	7 hr
Nov 13, 6:13 AM CST	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Ida	4 hr
Nov 14, 3:05 PM CST	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	7 hr
Nov 14, 3:29 PM CST	Dense Fog Advisory	DMX	Bremer, Butler, Cerro Gordo, Franklin, Worth	6 hr
Nov 17, 7:39 PM CST	Dense Fog Advisory	DMX	Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 41 more	4 hr
Dec 17, 3:13 AM CST	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 3 more	7 hr
Dec 17, 4:04 AM CST	Dense Fog Advisory	DMX	Cerro Gordo, Emmet, Franklin, Hamilton, Hancock, Hardin and 8 more	6 hr
Dec 17, 4:55 AM CST	Dense Fog Advisory	ARX	Chickasaw, Floyd, Howard, Mitchell, Winneshiek	7 hr
Dec 18, 5:04 AM CST	Dense Fog Advisory	DMX	Adair, Adams, Appanoose, Audubon, Boone, Cass and 17 more	4 hr
Dec 18, 5:04 AM CST	Dense Fog Advisory	OAX	Mills, Montgomery, Page, Pottawattamie	4 hr
Dec 18, 9:06 AM CST	Dense Fog Advisory	DMX	Adair, Adams, Cass, Clarke, Decatur, Madison and 3 more	34 min

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 2016 2018

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.