Dense Fog, Alexander
- When
- March 23, 12:00 AM CST to 8:00 AM CST
- Where
- Alexander forecast zone
- Reported by
- AWOS
- Coordinates
- 37.192, -89.338 (the zone’s center; the record gives no point)
Dense Fog in Illinois, March 23, 2010
Visibility was at or below one-quarter mile across most of southern Illinois. Clearing skies, light winds, and moist ground set the stage for widespread dense fog.
Where it happened
Every event with a place to put it; 18 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
- 18
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 PAH wrote it up.
Visibility was at or below one-quarter mile across most of southern Illinois. Clearing skies, light winds, and moist ground set the stage for widespread dense fog. These conditions were associated with a ridge axis extending northward across the Lower Ohio Valley from a high pressure center over the Deep South.
The radar
The national radar mosaic for the moment the first event began.
Event by event
18 dense fog. Local standard time, as filed.
Dense Fog, Edwards
- When
- March 23, 12:00 AM CST to 8:00 AM CST
- Where
- Edwards forecast zone
- Reported by
- AWOS
- Coordinates
- 38.417, -88.053 (the zone’s center; the record gives no point)
Dense Fog, Franklin
- When
- March 23, 12:00 AM CST to 8:00 AM CST
- Where
- Franklin forecast zone
- Reported by
- AWOS
- Coordinates
- 37.992, -88.924 (the zone’s center; the record gives no point)
Dense Fog, Gallatin
- When
- March 23, 12:00 AM CST to 8:00 AM CST
- Where
- Gallatin forecast zone
- Reported by
- AWOS
- Coordinates
- 37.763, -88.230 (the zone’s center; the record gives no point)
Dense Fog, Hamilton
- When
- March 23, 12:00 AM CST to 8:00 AM CST
- Where
- Hamilton forecast zone
- Reported by
- AWOS
- Coordinates
- 38.082, -88.539 (the zone’s center; the record gives no point)
Dense Fog, Hardin
- When
- March 23, 12:00 AM CST to 8:00 AM CST
- Where
- Hardin forecast zone
- Reported by
- AWOS
- Coordinates
- 37.518, -88.267 (the zone’s center; the record gives no point)
Dense Fog, Jackson
- When
- March 23, 12:00 AM CST to 8:00 AM CST
- Where
- Jackson forecast zone
- Reported by
- AWOS
- Coordinates
- 37.785, -89.382 (the zone’s center; the record gives no point)
Dense Fog, Jefferson
- When
- March 23, 12:00 AM CST to 8:00 AM CST
- Where
- Jefferson forecast zone
- Reported by
- AWOS
- Coordinates
- 38.301, -88.924 (the zone’s center; the record gives no point)
Dense Fog, Johnson
- When
- March 23, 12:00 AM CST to 8:00 AM CST
- Where
- Johnson forecast zone
- Reported by
- AWOS
- Coordinates
- 37.460, -88.881 (the zone’s center; the record gives no point)
Dense Fog, Massac
- When
- March 23, 12:00 AM CST to 8:00 AM CST
- Where
- Massac forecast zone
- Reported by
- AWOS
- Coordinates
- 37.219, -88.708 (the zone’s center; the record gives no point)
Dense Fog, Pope
- When
- March 23, 12:00 AM CST to 8:00 AM CST
- Where
- Pope forecast zone
- Reported by
- AWOS
- Coordinates
- 37.413, -88.562 (the zone’s center; the record gives no point)
Dense Fog, Pulaski
- When
- March 23, 12:00 AM CST to 8:00 AM CST
- Where
- Pulaski forecast zone
- Reported by
- AWOS
- Coordinates
- 37.223, -89.127 (the zone’s center; the record gives no point)
Dense Fog, Saline
- When
- March 23, 12:00 AM CST to 8:00 AM CST
- Where
- Saline forecast zone
- Reported by
- AWOS
- Coordinates
- 37.753, -88.541 (the zone’s center; the record gives no point)
Dense Fog, Union
- When
- March 23, 12:00 AM CST to 8:00 AM CST
- Where
- Union forecast zone
- Reported by
- AWOS
- Coordinates
- 37.471, -89.255 (the zone’s center; the record gives no point)
Dense Fog, Wabash
- When
- March 23, 12:00 AM CST to 8:00 AM CST
- Where
- Wabash forecast zone
- Reported by
- AWOS
- Coordinates
- 38.446, -87.844 (the zone’s center; the record gives no point)
Dense Fog, Wayne
- When
- March 23, 12:00 AM CST to 8:00 AM CST
- Where
- Wayne forecast zone
- Reported by
- AWOS
- Coordinates
- 38.430, -88.426 (the zone’s center; the record gives no point)
Dense Fog, White
- When
- March 23, 12:00 AM CST to 8:00 AM CST
- Where
- White forecast zone
- Reported by
- AWOS
- Coordinates
- 38.088, -88.180 (the zone’s center; the record gives no point)
Dense Fog, Williamson
- When
- March 23, 12:00 AM CST to 8:00 AM CST
- Where
- Williamson forecast zone
- Reported by
- AWOS
- Coordinates
- 37.730, -88.930 (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
- Wildfire in North Carolina, March 23, 2010
- Flooding in Maine, March 23 to 25, 2010
- Flooding in New Hampshire, March 23 to 25, 2010
- Winter Storm in Colorado, March 23 to 24, 2010
- Flood in New York, March 23, 2010
- Dense Fog in Kentucky, March 23, 2010
- High Surf in Hawaii, March 23 to 24, 2010
- Dense Fog in Missouri, March 23, 2010
- Winter Storm and Winter Weather in Colorado, March 23 to 24, 2010
- Heavy Snow in New Mexico, March 23 to 24, 2010
- Heavy Snow in Wyoming, March 23, 2010
- Dense Fog in Indiana, March 23, 2010
More
Every storm in Illinois in 2010Every state in 2010This day in weather historyWarnings in Illinois, March 2010
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 2026-09-30. Each event’s entry at NCEI: 215918, 215919, 215920, 215921, 215922, 215923, 215924, 215925, 215926, 215927, 215929, 215930, 215931, 215932, 215933, 215934, 215935, 215936.