Dense Fog, Sauk
- When
- December 21, 2:00 AM CST to December 22, 7:00 PM CST
- Where
- Sauk forecast zone
- Reported by
- ASOS
- Coordinates
- 43.427, -89.948 (the zone’s center; the record gives no point)
Dense Fog in Wisconsin, December 21 to 22, 2007
Dense fog covered all of south-central and southeast Wisconsin for nearly two days, resulting in numerous cancellations of airline flights and some civic functions. Warm, moist air on southeast winds flowing over melting snow was the factor in the dense fog formation.
Where it happened
Every event with a place to put it; 6 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 6
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
What happened
The episode as NWS MKX wrote it up.
Dense fog covered all of south-central and southeast Wisconsin for nearly two days, resulting in numerous cancellations of airline flights and some civic functions. Warm, moist air on southeast winds flowing over melting snow was the factor in the dense fog formation. Visibilities were reduced to 1/10 to 1/4 mile.
The radar
The national radar mosaic for the moment the first event began.
Event by event
6 dense fog. Local standard time, as filed.
Dense Fog, Iowa
- When
- December 21, 2:00 AM CST to December 22, 7:00 PM CST
- Where
- Iowa forecast zone
- Reported by
- ASOS
- Coordinates
- 43.001, -90.135 (the zone’s center; the record gives no point)
Dense Fog, Dane
- When
- December 21, 2:00 AM CST to December 22, 7:00 PM CST
- Where
- Dane forecast zone
- Reported by
- ASOS
- Coordinates
- 43.067, -89.418 (the zone’s center; the record gives no point)
Dense Fog, Lafayette
- When
- December 21, 2:00 AM CST to December 22, 7:00 PM CST
- Where
- Lafayette forecast zone
- Reported by
- ASOS
- Coordinates
- 42.661, -90.132 (the zone’s center; the record gives no point)
Dense Fog, Green
- When
- December 21, 2:00 AM CST to December 22, 7:00 PM CST
- Where
- Green forecast zone
- Reported by
- ASOS
- Coordinates
- 42.680, -89.602 (the zone’s center; the record gives no point)
Dense Fog, Rock
- When
- December 21, 2:00 AM CST to December 22, 7:00 PM CST
- Where
- Rock forecast zone
- Reported by
- ASOS
- Coordinates
- 42.671, -89.072 (the zone’s center; the record gives no point)
What these are
- Dense Fog
- Fog reducing visibility to a quarter mile or less, filed where it caused accidents or disruption.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Dense Fog in Kentucky, December 21, 2007
- Dense Fog in Illinois, December 21, 2007
- Winter Storm in New Mexico, December 21 to 22, 2007
- Dense Fog in Missouri, December 21, 2007
- Tornado in Florida, December 21, 2007
- Flash Flooding in Georgia, December 21, 2007
- Winter Storm in South Dakota, December 21, 2007
- Dense Fog in Wisconsin, December 21 to 22, 2007
- Dense Fog in Indiana, December 21, 2007
- Winter Storm in Colorado, December 21 to 22, 2007
- Dense Fog in Wisconsin, December 21 to 22, 2007
- High Wind in California, December 21, 2007
More
Every storm in Wisconsin in 2007Every state in 2007This day in weather historyWarnings in Wisconsin, December 2007
Sources
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 2026-10-01. Each event’s entry at NCEI: 70271, 70272, 70273, 70274, 70275, 70276.