Dense Fog, Sauk
- When
- July 5, 11:00 PM CST to July 6, 8:00 AM CST
- Where
- Sauk forecast zone
- Reported by
- AWOS,ASOS,MESONET,ETC
- Coordinates
- 43.427, -89.948 (the zone’s center; the record gives no point)
Dense Fog in Wisconsin, July 5 to 6, 2000
Leftover moisture in the lower levels of the atmosphere, light winds, and clear skies, allowed dense fog to develop overnight across parts of south-central Wisconsin. Visibilities dropped to 1/4 mile or less, and lowered to near zero in the river valleys, especially in the Wisconsin River valley.
Where it happened
Every event with a place to put it; 3 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
- 3
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.
Leftover moisture in the lower levels of the atmosphere, light winds, and clear skies, allowed dense fog to develop overnight across parts of south-central Wisconsin. Visibilities dropped to 1/4 mile or less, and lowered to near zero in the river valleys, especially in the Wisconsin River valley. Two dozen vehicle accidents were noted. Airplane traffic in and out of local airports was delayed until the dense fog burned off.
The radar
The national radar mosaic for the moment the first event began.
Event by event
3 dense fog. Local standard time, as filed.
Dense Fog, Iowa
- When
- July 5, 11:00 PM CST to July 6, 8:00 AM CST
- Where
- Iowa forecast zone
- Reported by
- AWOS,ASOS,MESONET,ETC
- Coordinates
- 43.001, -90.135 (the zone’s center; the record gives no point)
Dense Fog, Lafayette
- When
- July 5, 11:00 PM CST to July 6, 8:00 AM CST
- Where
- Lafayette forecast zone
- Reported by
- AWOS,ASOS,MESONET,ETC
- Coordinates
- 42.661, -90.132 (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
- Tornado and Hail in Colorado, July 5, 2000
- Heat in Texas, July 5, 2000
- Flash Flooding and Hail in Iowa, July 5, 2000
- Flash Flood and Hail in Nebraska, July 5 to 6, 2000
- Damaging Wind in Nebraska, July 5, 2000
- Damaging Wind in Nebraska, July 5, 2000
- Lightning Strike in South Carolina, July 5, 2000
- Damaging Wind in Florida, July 5, 2000
- Hail and Damaging Winds in Montana, July 5 to 6, 2000
- Flash Flooding in Ohio, July 5, 2000
- Damaging Winds in Illinois, July 5, 2000
- Flash Flooding and Hail in North Dakota, July 5, 2000
More
Every storm in Wisconsin in 2000Every state in 2000This day in weather historyWarnings in Wisconsin, July 2000
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: 5176501, 5176502, 5176503.