Dense Fog in Wisconsin

Events

1,612

Deaths

29

Injuries

63

Damage

$262,000

• Dense Fog in Wisconsin, October 11, 200211 deaths · 2 eventsShallow dense fog developed over parts of Sheboygan and Ozaukee counties during the overnight hours, and persisted to about 0830CST.
• Dense Fog in Wisconsin, January 5 to 7, 20082 deaths · 20 eventsDense fog covered most of south-central and southeast Wisconsin from Saturday evening through about sunrise of Monday with visibilities of 1/8 to 1/4 mile. At times Sunday afternoon visibilities were reduced to less than 25 yards due to the cooling effect of melting snow.
• Dense Fog in Wisconsin, September 30, 20212 deaths · $20,000 · 1 eventDense fog contributed to a two vehicle accident with two fatalities.
• Dense Fog in Wisconsin, February 17, 20111 death · 9 injured · $20,000 · 1 eventDense fog blanketed much of north central Wisconsin for a good share of February 17th. A nine vehicle accident at the intersection of State Highway 29 and County Road P east of Owen (Clark County) was responsible for the death of one person and injuries to nine others.
• Dense Fog in Wisconsin, February 12, 20181 death · 6 injured · 1 eventA crash involving 29 vehicles occurred in and near a patch of dense fog in the northbound lane of Highway 18/151 just south of Verona, WI. One death occurred.
• Dense Fog in Wisconsin, October 30, 20251 death · $50,000 · 1 eventA 3-vehicle accident occurred during the morning hours on October 30th, resulting in 1 fatality on highway 53 in northern La Crosse County.
• Dense Fog in Wisconsin, March 28, 20181 death · $40,000 · 1 eventAt least three accidents occurred in dense fog across Jackson County during the early morning of March 28th. There was one fatality on Interstate 94 when the driver of a U-Haul rear-ended a semi trailer. One of the other accidents was a car getting hit by a train.
• Dense Fog in Wisconsin, September 16, 20191 death · 3 injured · $12,000 · 1 eventDense fog during the early morning hours of September 16th led to a fatal car accident near Cashton, WI.
• Dense Fog in Wisconsin, April 8, 20201 death · $20,000 · 1 eventOne person was killed in a two vehicle accident near Potosi (Grant County) on the morning of April 8th. The driver of a pickup failed to stop for a stop sign at an intersection on U.S. Highway 61, collided with a semi-truck, and was thrown from the vehicle.
• Dense Fog in Wisconsin, January 5, 20211 death · 1 injured · 1 eventDense fog was a factor in a head-on-collision on highway 14 in the Janesville Township. One fatality and one seriously injured person were reported.
• Dense Fog in Wisconsin, September 4, 20091 death · 8 eventsThe combination of high pressure over the Great Lakes Region, clear skies, light winds, and a moist layer of air near the ground allowed for the formation of dense fog overnight. Visibilities were reduced to 1/8 to 1/4 mile. Some airplain flights were delayed.
• Winter Weather and Dense Fog in Wisconsin, December 29 to 31, 201010 injured · $338,000 · 13 eventsFog develop across western and central Wisconsin and reduced the visibility to less than mile for an extended period starting on the 29th and continuing through much of the 31st.
• Dense Fog in Wisconsin, August 23, 20001 death · 1 eventPatchy fog was indirectly related to the death of a young man, whose vehicle was involved in an accident on Highway 93, 5 miles north of Centerville.
• Dense Fog in Wisconsin, May 16 to 17, 20081 death · $5,000 · 1 eventDense fog led to a fatality in rural western Wisconsin.
• Dense Fog in Wisconsin, January 19, 20101 death · 1 eventSurface high pressure building into Wisconsin brought clear skies and light winds to most of the state during the morning hours of January 19th. These conditions were favorable for the formation of dense fog across portions of southern Wisconsin.
• Dense Fog in Wisconsin, August 3, 20181 death · 1 eventA death occurred due to a car accident in a construction zone during dense fog.
• Dense Fog in Wisconsin, December 15, 20211 death · $10,000 · 1 eventDense fog developed during the morning hours across northeast Wisconsin and continued through the late afternoon hours on Friday (12/15).
• Dense Fog in Wisconsin, December 3, 20231 death · 1 eventA fatal automobile accident occurred near Viola, WI (Vernon County) late on December 3rd on Wisconsin State Highway 56. A truck veered from the roadway and struck multiple trees.
• Dense Fog in Wisconsin, March 5, 201015 injured · 1 eventA broad area of high pressure persisted over northeast Wisconsin. Temperatures in the lower to middle 30's on March 4th caused snow to melt, adding moisture to the atmosphere.
• Dense Fog in Wisconsin, July 24, 201311 injured · $10,000 · 1 eventEleven people were injured in an early morning accident north of Plainville (Adams County). A van carrying farm workers was rear ended by a semi-truck when the van slowed to turn off of State Highway 82.
• Dense Fog in Wisconsin, December 14, 20147 injured · 1 eventDense fog developed in central Wisconsin as warm and moist air passed over much colder ground. The dense fog contributed to a head-on collision on Highway 29 in Wittenberg, near the Grand Avenue overpass, around 4:30 p.m. CST.
• Dense Fog in Wisconsin, July 7, 20173 injured · $40,000 · 1 eventDense fog was a factor in a couple accidents in Columbia County.
• Dense Fog in Wisconsin, January 11, 20134 injured · $15,000 · 1 eventFour people were injured in a two vehicle accident near Viroqua (Vernon County) that occurred in dense fog on January 11th. A school bus was struck near the rear wheels when the driver of the second vehicle did not see that the bus was turning.
• Heat and Dense Fog in Wisconsin, February 11, 199926 eventsSoutherly winds ahead of an approaching cold front brought unseasonably warm and moist air into Wisconsin. Much of central and northeast Wisconsin still had snow on the ground and the warm, moist air moving over the snow-covered ground resulted in widespread dense fog.
• Dense Fog in Wisconsin, December 12 to 13, 199922 eventsDense fog reduced visibilities to near zero over much of north-central, northeast, central and east-central Wisconsin. Moisture, trapped near the surface by weak high pressure, combined with cool temperatures and light winds to form widespread dense fog.

Dense Fog everywhereEvery kind of event in Wisconsin

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24.