Dense Fog, Jefferson
- When
- December 9, 11:00 PM CST to December 10, 8:00 AM CST
- Where
- Jefferson forecast zone
- Reported by
- AWOS,ASOS,MESONET,ETC
- Coordinates
- 43.021, -88.776 (the zone’s center; the record gives no point)
Dense Fog in Wisconsin, December 9 to 10, 2004
Dense fog developed overnight, reducing visibilities to 1/8 to 1/4 mile. Several vehicle accidents were noted in newspapers, and some airline flights were delayed.
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 developed overnight, reducing visibilities to 1/8 to 1/4 mile. Several vehicle accidents were noted in newspapers, and some airline flights were delayed.
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, Waukesha
- When
- December 9, 11:00 PM CST to December 10, 8:00 AM CST
- Where
- Waukesha forecast zone
- Reported by
- AWOS,ASOS,MESONET,ETC
- Coordinates
- 43.018, -88.304 (the zone’s center; the record gives no point)
Dense Fog, Milwaukee
- When
- December 9, 11:00 PM CST to December 10, 8:00 AM CST
- Where
- Milwaukee forecast zone
- Reported by
- AWOS,ASOS,MESONET,ETC
- Coordinates
- 43.022, -87.929 (the zone’s center; the record gives no point)
Dense Fog, Walworth
- When
- December 9, 11:00 PM CST to December 10, 8:00 AM CST
- Where
- Walworth forecast zone
- Reported by
- AWOS,ASOS,MESONET,ETC
- Coordinates
- 42.669, -88.542 (the zone’s center; the record gives no point)
Dense Fog, Racine
- When
- December 9, 11:00 PM CST to December 10, 8:00 AM CST
- Where
- Racine forecast zone
- Reported by
- AWOS,ASOS,MESONET,ETC
- Coordinates
- 42.730, -87.812 (the zone’s center; the record gives no point)
Dense Fog, Kenosha
- When
- December 9, 11:00 PM CST to December 10, 8:00 AM CST
- Where
- Kenosha forecast zone
- Reported by
- AWOS,ASOS,MESONET,ETC
- Coordinates
- 42.573, -87.840 (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
- Tornadoes and Flash Flooding in Mississippi, December 9, 2004
- Tornado in Louisiana, December 9, 2004
- Damaging Wind in Louisiana, December 9, 2004
- Damaging Wind in Louisiana, December 9, 2004
- Flash Flooding in Alabama, December 9, 2004
- Hail and Damaging Winds in Georgia, December 9, 2004
- Damaging Winds in Alabama, December 9, 2004
- Dense Fog in California, December 9 to 14, 2004
- Dense Fog in Wisconsin, December 9 to 10, 2004
- Flash Flooding in Tennessee, December 9, 2004
- Flash Flooding in Tennessee, December 9, 2004
- Flash Flood in Louisiana, December 9, 2004
More
Every storm in Wisconsin in 2004Every state in 2004This day in weather historyWarnings in Wisconsin, December 2004
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: 5430581, 5430582, 5430583, 5430584, 5430585, 5430586.