Dense Fog, Iowa
- When
- March 22, 1:00 AM CST to 9:00 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 in Wisconsin, March 22, 2001
Dense fog developed over southern Wisconsin and reduced visibilities to 1/4 mile or less. About a dozen vehicle accidents were noted, and many airplane flights were delayed or canceled at area airports.
Where it happened
Every event with a place to put it; 4 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
- 4
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 over southern Wisconsin and reduced visibilities to 1/4 mile or less. About a dozen vehicle accidents were noted, and many airplane flights were delayed or canceled at area airports. The combination of light winds and clear skies triggered the dense fog development. Scattered light precipitation preceded this dense fog event by several hours.
The radar
The national radar mosaic for the moment the first event began.
Event by event
4 dense fog. Local standard time, as filed.
Dense Fog, Lafayette
- When
- March 22, 1:00 AM CST to 9:00 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)
Dense Fog, Green
- When
- March 22, 1:00 AM CST to 9:00 AM CST
- Where
- Green forecast zone
- Reported by
- AWOS,ASOS,MESONET,ETC
- Coordinates
- 42.680, -89.602 (the zone’s center; the record gives no point)
Dense Fog, Rock
- When
- March 22, 1:00 AM CST to 9:00 AM CST
- Where
- Rock forecast zone
- Reported by
- AWOS,ASOS,MESONET,ETC
- 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
- Flash Flooding and Flooding in Massachusetts, March 22 to 31, 2001
- Flash Flood and Flood in Rhode Island, March 22 to 24, 2001
- Winter Storm in New York, March 22 to 23, 2001
- Winter Storm in Vermont, March 22 to 23, 2001
- Winter Storm in Vermont, March 22 to 23, 2001
- Winter Storm in Vermont, March 22 to 23, 2001
- Heavy Snow in New York, March 22, 2001
- Winter Storm in New York, March 22 to 23, 2001
- Heavy Snow in Maine, March 22 to 23, 2001
- Dense Fog in Wisconsin, March 22, 2001
- Strong Wind in Maine, March 22, 2001
- Heavy Snow in New Hampshire, March 22 to 23, 2001
More
Every storm in Wisconsin in 2001Every state in 2001This day in weather historyWarnings in Wisconsin, March 2001
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: 5236787, 5236788, 5236789, 5236790.