Dense Fog Advisories in Iowa, 2016

Dense Fog Advisories by county

Each county as a circle sized by its count in 2016. 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 3, 9:23 PM CST	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	13 hr
Jan 7, 5:20 AM CST	Dense Fog Advisory	OAX	Fremont, Harrison, Mills, Montgomery, Page, Pottawattamie and 1 more	4 hr
Jan 7, 6:46 AM CST	Dense Fog Advisory	DMX	Adair, Adams, Audubon, Boone, Calhoun, Carroll and 26 more	5 hr
Jan 7, 7:57 AM CST	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	4 hr
Jan 7, 9:00 AM CST	Dense Fog Advisory	OAX	Harrison, Mills, Montgomery, Pottawattamie, Shelby	2 hr
Jan 7, 12:09 PM CST	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Ida, O'Brien, Plymouth and 2 more	111 min
Jan 7, 2:03 PM CST	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Ida, O'Brien, Plymouth and 2 more	88 min
Jan 8, 4:45 AM CST	Dense Fog Advisory	DMX	Appanoose, Black Hawk, Bremer, Butler, Clarke, Davis and 16 more	14 hr
Jan 8, 5:17 AM CST	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	16 hr
Jan 8, 6:21 AM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	17 hr
Jan 21, 8:23 AM CST	Dense Fog Advisory	FSD	Lyon	5 hr
Jan 24, 7:39 PM CST	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Lyon, O'Brien and 3 more	10 hr
Jan 24, 7:41 PM CST	Dense Fog Advisory	DMX	Emmet, Humboldt, Kossuth, Palo Alto, Pocahontas	10 hr
Feb 1, 9:50 AM CST	Dense Fog Advisory	DMX	Appanoose, Black Hawk, Bremer, Butler, Davis, Grundy and 7 more	5 hr
Feb 1, 10:03 AM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	4 hr
Feb 1, 3:21 PM CST	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	12 hr
Feb 1, 7:17 PM CST	Dense Fog Advisory	DMX	Black Hawk, Bremer, Butler, Cerro Gordo, Emmet, Franklin and 14 more	8 hr
Feb 1, 9:14 PM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 7 more	6 hr
Feb 2, 5:31 PM CST	Dense Fog Advisory	DVN	Benton, Cedar, Clinton, Des Moines, Henry, Iowa and 12 more	9 hr
Feb 2, 5:40 PM CST	Dense Fog Advisory	DMX	Adair, Adams, Appanoose, Clarke, Davis, Decatur and 14 more	9 hr
Feb 3, 2:54 AM CST	Dense Fog Advisory	DVN	Clinton, Jackson, Jones, Linn	3 hr
Feb 5, 10:52 PM CST	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	11 hr
Feb 15, 4:30 AM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	6 hr
Feb 15, 4:53 AM CST	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Howard, Winneshiek	5 hr
Feb 15, 8:24 AM CST	Dense Fog Advisory	FSD	Lyon, Osceola, Sioux	4 hr
Feb 22, 5:30 AM CST	Dense Fog Advisory	OAX	Monona	6 hr
Feb 22, 5:47 AM CST	Dense Fog Advisory	FSD	Ida, Plymouth, Woodbury	6 hr
Mar 13, 6:34 AM CDT	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	5 hr
Mar 13, 9:58 PM CDT	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	14 hr
Mar 13, 10:15 PM CDT	Dense Fog Advisory	DMX	Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 45 more	14 hr
Mar 13, 11:52 PM CDT	Dense Fog Advisory	ARX	Chickasaw, Fayette, Floyd, Howard, Mitchell, Winneshiek	10 hr
Mar 14, 12:59 AM CDT	Dense Fog Advisory	DVN	Benton, Buchanan, Des Moines, Henry, Iowa, Jefferson and 7 more	9 hr
Mar 14, 7:13 AM CDT	Dense Fog Advisory	OAX	Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more	3 hr
Apr 21, 3:42 AM CDT	Dense Fog Advisory	DVN	Cedar, Clinton, Des Moines, Dubuque, Jackson, Jones and 3 more	5 hr
Apr 23, 3:37 AM CDT	Dense Fog Advisory	DMX	Appanoose, Black Hawk, Bremer, Butler, Cerro Gordo, Davis and 20 more	3 hr
May 11, 4:31 AM CDT	Dense Fog Advisory	DVN	Des Moines, Henry, Jefferson, Keokuk, Lee, Louisa and 4 more	5 hr
May 11, 5:13 AM CDT	Dense Fog Advisory	FSD	Buena Vista, Clay, Dickinson	4 hr
May 11, 5:17 AM CDT	Dense Fog Advisory	DMX	Appanoose, Boone, Calhoun, Clarke, Dallas, Davis and 26 more	6 hr
May 12, 12:55 AM CDT	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	4 hr
May 18, 6:26 AM CDT	Dense Fog Advisory	DMX	Adair, Adams, Appanoose, Cass, Clarke, Decatur and 9 more	3 hr
May 18, 6:34 AM CDT	Dense Fog Advisory	OAX	Montgomery, Page	2 hr
Jun 1, 3:35 AM CDT	Dense Fog Advisory	DVN	Benton, Buchanan, Delaware, Iowa, Jefferson, Johnson and 3 more	4 hr
Jun 1, 3:37 AM CDT	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 1 more	4 hr
Jun 1, 3:42 AM CDT	Dense Fog Advisory	DMX	Appanoose, Black Hawk, Bremer, Butler, Clarke, Davis and 14 more	3 hr
Aug 3, 2:58 AM CDT	Dense Fog Advisory	DMX	Adair, Adams, Appanoose, Audubon, Boone, Butler and 32 more	5 hr
Aug 3, 6:28 AM CDT	Dense Fog Advisory	OAX	Fremont, Mills, Montgomery, Page, Pottawattamie, Shelby	3 hr
Aug 18, 7:00 AM CDT	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	2 hr
Aug 28, 3:33 AM CDT	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	6 hr
Sep 20, 1:42 AM CDT	Dense Fog Advisory	ARX	Allamakee, Clayton, Fayette, Winneshiek	8 hr
Sep 20, 5:16 AM CDT	Dense Fog Advisory	DVN	Delaware, Dubuque, Jackson, Jones	4 hr
Oct 15, 3:11 PM CDT	Dense Fog Advisory	OAX	Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more	20 hr
Oct 15, 3:24 PM CDT	Dense Fog Advisory	DMX	Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 28 more	20 hr
Oct 16, 2:15 AM CDT	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Ida, Plymouth, Woodbury	10 hr
Oct 16, 3:22 PM CDT	Dense Fog Advisory	OAX	Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more	21 hr
Oct 16, 3:30 PM CDT	Dense Fog Advisory	DMX	Adair, Adams, Audubon, Calhoun, Carroll, Cass and 11 more	20 hr
Oct 16, 3:48 PM CDT	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	19 hr
Oct 27, 7:13 AM CDT	Dense Fog Advisory	OAX	Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more	3 hr
Nov 1, 6:10 AM CDT	Dense Fog Advisory	FSD	Cherokee, O'Brien, Plymouth, Sioux	3 hr
Nov 4, 3:48 AM CDT	Dense Fog Advisory	DVN	Cedar, Clinton, Delaware, Dubuque, Jackson, Jones and 2 more	8 hr
Nov 15, 3:15 AM CST	Dense Fog Advisory	ARX	Chickasaw, Fayette, Floyd, Howard, Mitchell, Winneshiek	7 hr
Nov 15, 3:22 AM CST	Dense Fog Advisory	DMX	Black Hawk, Bremer, Butler, Cerro Gordo, Franklin, Grundy and 15 more	7 hr
Nov 15, 5:04 AM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Delaware, Dubuque, Iowa, Jefferson and 5 more	6 hr
Nov 26, 10:49 PM CST	Dense Fog Advisory	ARX	Chickasaw, Floyd, Howard, Mitchell	13 hr
Nov 27, 2:28 AM CST	Dense Fog Advisory	DMX	Bremer, Butler, Cerro Gordo, Emmet, Franklin, Hancock and 4 more	7 hr
Dec 5, 3:47 AM CST	Dense Fog Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	9 hr
Dec 5, 3:53 AM CST	Dense Fog Advisory	DMX	Appanoose, Black Hawk, Bremer, Davis, Decatur, Grundy and 10 more	5 hr
Dec 5, 9:04 AM CST	Dense Fog Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	3 hr
Dec 5, 9:10 AM CST	Dense Fog Advisory	DMX	Appanoose, Davis, Mahaska, Monroe, Poweshiek, Wapello	81 min
Dec 6, 6:03 AM CST	Dense Fog Advisory	DVN	Cedar, Clinton, Dubuque, Jackson, Jones, Muscatine and 1 more	5 hr
Dec 24, 12:00 AM CST	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 3 more	14 hr
Dec 24, 1:50 AM CST	Dense Fog Advisory	DMX	Adair, Adams, Appanoose, Audubon, Boone, Calhoun and 33 more	26 hr
Dec 24, 1:54 AM CST	Dense Fog Advisory	OAX	Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more	11 hr
Dec 24, 2:41 PM CST	Dense Fog Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	13 hr
Dec 24, 3:41 PM CST	Dense Fog Advisory	OAX	Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more	17 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 2015 2017

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.