Dense Fog, Alexander
- When
- January 23, 2:00 PM CST to January 24, 12:00 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, January 23 to 24, 2024
Dense fog of a quarter mile or less visibility redeveloped twice in Southern Illinois from later on in the 23rd through the morning of the 24th. The first occurrence was during the afternoon-evening hours of the 23rd when, despite areas of heavier rainfall, fog developed due to calm winds and dew points in the mid 40s to the lower 50s, which drew in moisture from frozen near-surface soils.
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.
Dense fog of a quarter mile or less visibility redeveloped twice in Southern Illinois from later on in the 23rd through the morning of the 24th. The first occurrence was during the afternoon-evening hours of the 23rd when, despite areas of heavier rainfall, fog developed due to calm winds and dew points in the mid 40s to the lower 50s, which drew in moisture from frozen near-surface soils. Coverage of dense fog was spottier and more temporary in the afternoon-evening, while more widespread dense fog development occurred during the overnight hours of the 24th, continuing through the morning, as light drizzle occurred with calm winds. On a broader scale, a large-scale fog event was developing, stretching from the Upper Midwest to the Southern Plains.
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, Jefferson
- When
- January 23, 3:00 PM CST to January 24, 12:00 PM CST
- Where
- Jefferson forecast zone
- Reported by
- AWOS
- Coordinates
- 38.301, -88.924 (the zone’s center; the record gives no point)
Dense Fog, Pulaski
- When
- January 23, 4:00 PM CST to January 24, 12:00 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, Massac
- When
- January 23, 4:00 PM CST to January 24, 12:00 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, Johnson
- When
- January 23, 4:00 PM CST to January 24, 12:00 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, Union
- When
- January 23, 4:00 PM CST to January 24, 12:00 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, Pope
- When
- January 23, 4:00 PM CST to January 24, 12:00 PM CST
- Where
- Pope forecast zone
- Reported by
- AWOS
- Coordinates
- 37.413, -88.562 (the zone’s center; the record gives no point)
Dense Fog, Hardin
- When
- January 23, 4:00 PM CST to January 24, 12:00 PM 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
- January 23, 4:00 PM CST to January 24, 12:00 PM CST
- Where
- Jackson forecast zone
- Reported by
- ASOS
- Coordinates
- 37.785, -89.382 (the zone’s center; the record gives no point)
Dense Fog, Saline
- When
- January 23, 4:00 PM CST to January 24, 12:00 PM CST
- Where
- Saline forecast zone
- Reported by
- AWOS
- Coordinates
- 37.753, -88.541 (the zone’s center; the record gives no point)
Dense Fog, Gallatin
- When
- January 23, 4:00 PM CST to January 24, 12:00 PM CST
- Where
- Gallatin forecast zone
- Reported by
- AWOS
- Coordinates
- 37.763, -88.230 (the zone’s center; the record gives no point)
Dense Fog, Perry
- When
- January 23, 4:00 PM CST to January 24, 12:00 PM CST
- Where
- Perry forecast zone
- Reported by
- AWOS
- Coordinates
- 38.084, -89.367 (the zone’s center; the record gives no point)
Dense Fog, Franklin
- When
- January 23, 4:00 PM CST to January 24, 12:00 PM CST
- Where
- Franklin forecast zone
- Reported by
- AWOS
- Coordinates
- 37.992, -88.924 (the zone’s center; the record gives no point)
Dense Fog, Hamilton
- When
- January 23, 4:00 PM CST to January 24, 12:00 PM CST
- Where
- Hamilton forecast zone
- Reported by
- AWOS
- Coordinates
- 38.082, -88.539 (the zone’s center; the record gives no point)
Dense Fog, White
- When
- January 23, 4:00 PM CST to January 24, 12:00 PM CST
- Where
- White forecast zone
- Reported by
- AWOS
- Coordinates
- 38.088, -88.180 (the zone’s center; the record gives no point)
Dense Fog, Wayne
- When
- January 23, 4:00 PM CST to January 24, 12:00 PM CST
- Where
- Wayne forecast zone
- Reported by
- AWOS
- Coordinates
- 38.430, -88.426 (the zone’s center; the record gives no point)
Dense Fog, Edwards
- When
- January 23, 4:00 PM CST to January 24, 12:00 PM CST
- Where
- Edwards forecast zone
- Reported by
- AWOS
- Coordinates
- 38.417, -88.053 (the zone’s center; the record gives no point)
Dense Fog, Wabash
- When
- January 23, 4:00 PM CST to January 24, 12:00 PM CST
- Where
- Wabash forecast zone
- Reported by
- AWOS
- Coordinates
- 38.446, -87.844 (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
- Heavy Rain in Arkansas, January 23 to 24, 2024
- Flash Flooding and Flooding in Texas, January 23 to 25, 2024
- Cold in Illinois, January 23, 2024
- Flooding and Freezing Fog in Arkansas, January 23 to 31, 2024
- Dense Fog in Kentucky, January 23 to 24, 2024
- Flash Flooding in Texas, January 23 to 24, 2024
- Dense Fog in Indiana, January 23, 2024
- Flooding in Arizona, January 23, 2024
- Dense Fog in Kentucky, January 23, 2024
- Dense Fog in Missouri, January 23, 2024
- Blizzard in Alaska, January 23 to 25, 2024
- Dense Fog in Illinois, January 23, 2024
More
Every storm in Illinois in 2024Every state in 2024This day in weather historyWarnings in Illinois, January 2024
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: 1155550, 1155567, 1155554, 1155555, 1155556, 1155557, 1155558, 1155559, 1155560, 1155561, 1155562, 1155563, 1155564, 1155565, 1155566, 1155568, 1155569, 1155570.