Dense Fog Advisories in Wisconsin
1,331 dense fog advisories since 1986. 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 since 1986. Tap one for its archive.
- Dense Fog Advisories
- 1,331
- Busiest year
- 202489 dense fog advisories
- Average year
- 61over 22 years on file
Over time
By year
Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Sheboygan County262
- Washington County253
- Ozaukee County249
- Douglas County248
- Waukesha County245
- Walworth County243
- Kenosha County238
- Racine County236
- Rock County234
- Green County233
- Milwaukee County225
- Jefferson County224
- Dodge County223
- Dane County220
- Iowa County217
- Lafayette County211
- Sauk County200
- Columbia County198
- Fond du Lac County195
- Marquette County166
- Green Lake County165
- Bayfield County159
- Ashland County155
- Grant County154
- Crawford County145
- Vernon County143
- Jackson County142
- Richland County139
- Monroe County136
- Manitowoc County133
- Buffalo County131
- Juneau County131
- Kewaunee County131
- Polk County128
- Adams County128
- Clark County128
- Trempealeau County128
- Barron County127
- Lincoln County125
- Portage County125
32 more counties
- Waupaca County125
- Marathon County124
- Wood County124
- Taylor County124
- Dunn County123
- Saint Croix County122
- Shawano County122
- Iron County121
- Door County121
- Langlade County120
- Waushara County119
- Chippewa County118
- Pepin County118
- Rusk County118
- La Crosse County118
- Pierce County117
- Oconto County116
- Menominee County115
- Eau Claire County114
- Winnebago County114
- Calumet County113
- Marinette County113
- Outagamie County113
- Brown County113
- Burnett County111
- Washburn County109
- Oneida County107
- Vilas County101
- Sawyer County98
- Forest County95
- Florence County94
- Price County93
The latest dense fog advisories
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 1, 1:50 AM CDT | Dense Fog Advisory | MPX | Barron, Chippewa, Dunn, Eau Claire, Pepin, Pierce and 3 more | 5 hr |
| Oct 1, 1:50 AM CDT | Dense Fog Advisory | ARX | Clark, Taylor | 5 hr |
| Sep 29, 6:28 AM CDT | Dense Fog Advisory | MKX | Kenosha, Racine, Walworth | 4 hr |
| Sep 29, 6:09 AM CDT | Dense Fog Advisory | MKX | Kenosha, Racine, Walworth | 19 min |
| Sep 28, 6:16 AM CDT | Dense Fog Advisory | ARX | Buffalo, Clark, Jackson, Taylor, Trempealeau | 4 hr |
| Sep 28, 4:50 AM CDT | Dense Fog Advisory | GRB | Florence, Forest, Langlade, Lincoln, Oneida, Vilas | 5 hr |
| Sep 27, 9:35 PM CDT | Dense Fog Advisory | DLH | Ashland, Bayfield, Burnett, Douglas, Iron, Price and 2 more | 12 hr |
| Sep 27, 8:17 PM CDT | Dense Fog Advisory | MPX | Barron, Chippewa, Dunn, Eau Claire, Pepin, Pierce and 3 more | 14 hr |
| Sep 25, 3:33 AM CDT | Dense Fog Advisory | DLH | Douglas | 4 hr |
| Sep 6, 2:54 AM CDT | Dense Fog Advisory | MKX | Sauk | 6 hr |
| Sep 6, 2:46 AM CDT | Dense Fog Advisory | ARX | Adams, Juneau, Monroe, Richland, Vernon | 6 hr |
| Sep 4, 1:07 PM CDT | Dense Fog Advisory | DLH | Ashland, Bayfield, Iron | 16 hr |
Nearby
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.