Dense Fog, Kenosha
- When
- April 30, 1:00 AM CST to 6:00 AM CST
- Where
- Kenosha forecast zone
- Reported by
- ASOS
- Coordinates
- 42.573, -87.840 (the zone’s center; the record gives no point)
Dense Fog in Wisconsin, April 30, 2009
Light easterly winds from off the cooler waters of Lake Michigan combined with increasing moisture as surface low pressure approached from the southwest to produce dense fog across portions of Southeast Wisconsin. Visibilities fell to 1/4 mile or less along and east of a Sheboygan County to Walworth County line.
Where it happened
Every event with a place to put it; 8 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
- 8
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.
Light easterly winds from off the cooler waters of Lake Michigan combined with increasing moisture as surface low pressure approached from the southwest to produce dense fog across portions of Southeast Wisconsin. Visibilities fell to 1/4 mile or less along and east of a Sheboygan County to Walworth County line. Several airline flights were delayed at the Milwaukee Airport.
The radar
The national radar mosaic for the moment the first event began.
Event by event
8 dense fog. Local standard time, as filed.
Dense Fog, Racine
- When
- April 30, 2:00 AM CST to 7:00 AM CST
- Where
- Racine forecast zone
- Reported by
- ASOS
- Coordinates
- 42.730, -87.812 (the zone’s center; the record gives no point)
Dense Fog, Walworth
- When
- April 30, 2:00 AM CST to 7:00 AM CST
- Where
- Walworth forecast zone
- Reported by
- Law Enforcement
- Coordinates
- 42.669, -88.542 (the zone’s center; the record gives no point)
Dense Fog, Milwaukee
- When
- April 30, 2:00 AM CST to 7:00 AM CST
- Where
- Milwaukee forecast zone
- Reported by
- ASOS
- Coordinates
- 43.022, -87.929 (the zone’s center; the record gives no point)
Dense Fog, Waukesha
- When
- April 30, 3:00 AM CST to 8:00 AM CST
- Where
- Waukesha forecast zone
- Reported by
- AWOS
- Coordinates
- 43.018, -88.304 (the zone’s center; the record gives no point)
Dense Fog, Ozaukee
- When
- April 30, 3:00 AM CST to 8:00 AM CST
- Where
- Ozaukee forecast zone
- Reported by
- Law Enforcement
- Coordinates
- 43.403, -87.891 (the zone’s center; the record gives no point)
Dense Fog, Washington
- When
- April 30, 3:30 AM CST to 7:00 AM CST
- Where
- Washington forecast zone
- Reported by
- ASOS
- Coordinates
- 43.369, -88.231 (the zone’s center; the record gives no point)
Dense Fog, Sheboygan
- When
- April 30, 4:00 AM CST to 8:00 AM CST
- Where
- Sheboygan forecast zone
- Reported by
- ASOS
- Coordinates
- 43.756, -87.800 (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
- Hail in Oklahoma, April 30, 2009
- Flooding and Heavy Rain in Iowa, April 30, 2009
- Flooding and Heavy Rain in Illinois, April 30, 2009
- Tornadoes and Flash Flood in Kentucky, April 30, 2009
- High Wind in Oklahoma, April 30, 2009
- Flash Flood in Missouri, April 30, 2009
- Flash Flood and Hail in Arkansas, April 30, 2009
- Hail in Kansas, April 30, 2009
- Hail in Tennessee, April 30, 2009
- Flood in Alaska, April 30, 2009
- Flood in Iowa, April 30, 2009
- Wildfire in Texas, April 30, 2009
More
Every storm in Wisconsin in 2009Every state in 2009This day in weather historyWarnings in Wisconsin, April 2009
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: 164719, 164720, 164721, 164722, 164723, 164724, 164726, 164725.