Dense Fog Advisories in Wisconsin, 2021

Dense Fog Advisories by county

Each county as a circle sized by its count in 2021. 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, 1:46 PM CST	Dense Fog Advisory	GRB	Brown, Calumet, Door, Florence, Forest, Kewaunee and 16 more	22 hr
Jan 2, 1:55 PM CST	Dense Fog Advisory	ARX	Adams, Buffalo, Clark, Crawford, Grant, Jackson and 7 more	22 hr
Jan 2, 1:57 PM CST	Dense Fog Advisory	MPX	Barron, Chippewa, Dunn, Eau Claire, Pepin, Pierce and 3 more	22 hr
Jan 2, 2:24 PM CST	Dense Fog Advisory	MKX	Columbia, Dane, Dodge, Fond du Lac, Green, Green Lake and 9 more	22 hr
Jan 2, 2:33 PM CST	Dense Fog Advisory	DLH	Burnett, Price, Sawyer, Washburn	17 hr
Jan 3, 2:23 PM CST	Dense Fog Advisory	MKX	Columbia, Dane, Dodge, Fond du Lac, Green, Green Lake and 14 more	28 hr
Jan 3, 2:47 PM CST	Dense Fog Advisory	MPX	Barron, Chippewa, Dunn, Eau Claire, Pepin, Pierce and 3 more	21 hr
Jan 3, 2:58 PM CST	Dense Fog Advisory	ARX	Adams, Buffalo, Clark, Crawford, Grant, Jackson and 7 more	24 hr
Jan 3, 3:03 PM CST	Dense Fog Advisory	GRB	Brown, Calumet, Marathon, Outagamie, Portage, Shawano and 4 more	21 hr
Jan 4, 8:41 PM CST	Dense Fog Advisory	DLH	Burnett, Price, Sawyer, Washburn	13 hr
Jan 4, 8:44 PM CST	Dense Fog Advisory	MPX	Barron, Chippewa, Dunn, Eau Claire, Pepin, Pierce and 3 more	13 hr
Jan 4, 8:47 PM CST	Dense Fog Advisory	ARX	Adams, Buffalo, Clark, Crawford, Grant, Jackson and 7 more	13 hr
Jan 5, 1:55 PM CST	Dense Fog Advisory	MPX	Barron, Chippewa, Dunn, Eau Claire, Pepin, Pierce and 3 more	19 hr
Jan 5, 1:57 PM CST	Dense Fog Advisory	DLH	Ashland, Bayfield, Burnett, Douglas, Iron, Price and 2 more	19 hr
Jan 5, 2:02 PM CST	Dense Fog Advisory	ARX	Adams, Buffalo, Clark, Crawford, Grant, Jackson and 7 more	19 hr
Jan 5, 2:06 PM CST	Dense Fog Advisory	GRB	Brown, Calumet, Door, Florence, Forest, Kewaunee and 16 more	23 hr
Jan 5, 5:33 PM CST	Dense Fog Advisory	MKX	Columbia, Dane, Dodge, Fond du Lac, Green, Green Lake and 14 more	18 hr
Jan 6, 2:02 PM CST	Dense Fog Advisory	ARX	Adams, Clark, Crawford, Grant, Jackson, Juneau and 4 more	19 hr
Jan 6, 2:39 PM CST	Dense Fog Advisory	GRB	Brown, Calumet, Langlade, Lincoln, Marathon, Menominee and 8 more	19 hr
Jan 6, 2:45 PM CST	Dense Fog Advisory	MKX	Columbia, Dane, Dodge, Fond du Lac, Green, Green Lake and 9 more	22 hr
Jan 7, 2:48 PM CST	Dense Fog Advisory	DLH	Ashland, Bayfield, Burnett, Douglas	20 hr
Jan 8, 2:18 PM CST	Dense Fog Advisory	MPX	Pierce, Polk, Saint Croix	22 hr
Feb 25, 10:11 PM CST	Dense Fog Advisory	ARX	Grant	9 hr
Feb 26, 2:57 AM CST	Dense Fog Advisory	MKX	Iowa, Lafayette	5 hr
Feb 28, 3:27 AM CST	Dense Fog Advisory	MKX	Columbia, Dane, Dodge, Fond du Lac, Green, Green Lake and 14 more	9 hr
Feb 28, 6:49 AM CST	Dense Fog Advisory	ARX	Adams, Crawford, Grant, Juneau, La Crosse, Monroe and 2 more	5 hr
Apr 8, 11:55 PM CDT	Dense Fog Advisory	DLH	Bayfield, Douglas	15 hr
May 3, 4:45 AM CDT	Dense Fog Advisory	MKX	Sheboygan	4 hr
May 24, 2:42 AM CDT	Dense Fog Advisory	MKX	Kenosha, Milwaukee, Ozaukee, Racine, Sheboygan, Walworth and 2 more	8 hr
Jun 11, 6:50 AM CDT	Dense Fog Advisory	DLH	Ashland, Bayfield, Douglas, Iron	4 hr
Jun 30, 4:35 AM CDT	Dense Fog Advisory	ARX	Crawford, Grant, Richland, Vernon	3 hr
Jul 28, 6:42 AM CDT	Dense Fog Advisory	DLH	Ashland, Bayfield, Douglas, Iron, Price	3 hr
Aug 8, 8:24 AM CDT	Dense Fog Advisory	DLH	Douglas	4 hr
Aug 8, 11:12 PM CDT	Dense Fog Advisory	DLH	Douglas	11 hr
Aug 10, 1:36 AM CDT	Dense Fog Advisory	GRB	Florence, Forest, Langlade, Lincoln, Marinette, Menominee and 3 more	6 hr
Aug 20, 2:05 AM CDT	Dense Fog Advisory	MKX	Dodge, Fond du Lac, Jefferson, Kenosha, Milwaukee, Ozaukee and 5 more	7 hr
Sep 29, 8:34 PM CDT	Dense Fog Advisory	GRB	Brown, Calumet, Door, Kewaunee, Manitowoc, Marinette and 3 more	12 hr
Sep 29, 8:37 PM CDT	Dense Fog Advisory	MKX	Fond du Lac, Milwaukee, Ozaukee, Sheboygan, Washington, Waukesha	12 hr
Sep 30, 7:17 PM CDT	Dense Fog Advisory	GRB	Brown, Calumet, Door, Kewaunee, Manitowoc, Marinette and 5 more	14 hr
Sep 30, 7:55 PM CDT	Dense Fog Advisory	MKX	Fond du Lac, Kenosha, Milwaukee, Ozaukee, Racine, Sheboygan and 2 more	13 hr
Oct 3, 12:48 AM CDT	Dense Fog Advisory	GRB	Door, Florence, Forest, Kewaunee, Langlade, Lincoln and 7 more	9 hr
Oct 3, 2:49 PM CDT	Dense Fog Advisory	MPX	Barron, Pierce, Polk, Saint Croix	20 hr
Oct 3, 2:54 PM CDT	Dense Fog Advisory	DLH	Ashland, Bayfield, Burnett, Douglas, Sawyer, Washburn	21 hr
Oct 4, 2:25 PM CDT	Dense Fog Advisory	DLH	Ashland, Bayfield, Burnett, Douglas, Sawyer, Washburn	22 hr
Oct 4, 2:43 PM CDT	Dense Fog Advisory	MPX	Barron, Dunn, Pepin, Pierce, Polk, Rusk and 1 more	19 hr
Oct 5, 3:36 PM CDT	Dense Fog Advisory	DLH	Ashland, Bayfield, Douglas, Iron	18 hr
Oct 6, 3:23 PM CDT	Dense Fog Advisory	DLH	Ashland, Bayfield, Douglas	21 hr
Oct 7, 3:36 PM CDT	Dense Fog Advisory	DLH	Douglas	12 hr
Oct 7, 8:22 PM CDT	Dense Fog Advisory	MKX	Dane, Dodge, Green, Iowa, Jefferson, Kenosha and 8 more	14 hr
Oct 8, 2:56 PM CDT	Dense Fog Advisory	DLH	Burnett, Douglas, Sawyer, Washburn	22 hr
Oct 8, 9:30 PM CDT	Dense Fog Advisory	MPX	Barron, Chippewa, Dunn, Eau Claire, Pepin, Rusk	12 hr
Oct 8, 9:34 PM CDT	Dense Fog Advisory	ARX	Adams, Buffalo, Clark, Crawford, Grant, Jackson and 7 more	12 hr
Oct 8, 11:23 PM CDT	Dense Fog Advisory	MKX	Columbia, Dane, Dodge, Fond du Lac, Green, Green Lake and 14 more	12 hr
Oct 9, 3:42 AM CDT	Dense Fog Advisory	GRB	Calumet, Langlade, Lincoln, Marathon, Menominee, Oneida and 8 more	8 hr
Oct 9, 4:26 PM CDT	Dense Fog Advisory	DLH	Douglas	12 hr
Oct 30, 12:47 AM CDT	Dense Fog Advisory	DLH	Bayfield, Burnett, Douglas, Washburn	9 hr
Dec 11, 2:36 AM CST	Dense Fog Advisory	MKX	Dane, Dodge, Fond du Lac, Green, Jefferson, Kenosha and 8 more	3 hr
Dec 15, 3:34 AM CST	Dense Fog Advisory	MPX	Barron, Chippewa, Dunn, Eau Claire, Pepin, Pierce and 3 more	11 hr
Dec 15, 3:48 AM CST	Dense Fog Advisory	ARX	Adams, Buffalo, Clark, Jackson, Juneau, La Crosse and 4 more	8 hr
Dec 15, 3:52 AM CST	Dense Fog Advisory	GRB	Brown, Calumet, Door, Florence, Forest, Kewaunee and 16 more	20 hr
Dec 15, 3:56 AM CST	Dense Fog Advisory	DLH	Ashland, Bayfield, Burnett, Douglas, Iron, Price and 2 more	16 hr
Dec 15, 12:07 PM CST	Dense Fog Advisory	ARX	Clark, Taylor	9 hr
Dec 23, 6:39 PM CST	Dense Fog Advisory	GRB	Florence, Forest, Langlade, Lincoln, Marathon, Marinette and 8 more	12 hr
Dec 24, 2:30 PM CST	Dense Fog Advisory	GRB	Brown, Calumet, Door, Florence, Forest, Kewaunee and 16 more	10 hr
Dec 24, 2:40 PM CST	Dense Fog Advisory	ARX	Adams, Buffalo, Clark, Crawford, Grant, Jackson and 7 more	9 hr
Dec 24, 3:21 PM CST	Dense Fog Advisory	MKX	Columbia, Dane, Dodge, Fond du Lac, Green, Green Lake and 14 more	10 hr
Dec 24, 6:17 PM CST	Dense Fog Advisory	MPX	Barron, Chippewa, Dunn, Eau Claire, Pepin, Rusk	6 hr

By county

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

32 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 2020 2022

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.