Dense Fog in Illinois, July 8, 2025

Name: Dense Fog in Illinois, July 8, 2025
Start: 2025-07-08T00:30
End: 2025-07-08T06:00
Location: Illinois

July 8, 2025 · NWS PAH · 10 events in 10 counties and zones

Calm winds and lingering low-level moisture from rainfall on the 7th resulted in the formation of areas of dense fog in Southern Illinois along and south of IL-13 during the late night to early morning hours.

Where it happened

Every event with a place to put it; 10 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

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 10

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.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Paducah, KY wrote its last area forecast discussion before the first event at Jul 7, 10:44 PM CST, 1 hour 46 minutes earlier.

Area forecast discussion, Jul 7, 10:44 PM CST, 1 hour 46 minutes before

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Hazardous weather outlook, Jul 7, 12:43 PM CST, 11 hours 47 minutes before

Hazardous Weather Outlook
National Weather Service Paducah KY
143 PM CDT Mon Jul 7 2025

ILZ075>078-080>094-INZ081-082-085>088-KYZ001>022-MOZ076-086-087-
100-107>112-114-081845-
Jefferson-Wayne IL-Edwards-Wabash-Perry IL-Franklin-Hamilton-
White-Jackson-Williamson-Saline-Gallatin-Union-Johnson-Pope-
Hardin-Alexander-Pulaski-Massac-Gibson-Pike-Posey-Vanderburgh-
Warrick-Spencer-Fulton-Hickman-Carlisle-Ballard-McCracken-Graves-
Livingston-Marshall-Calloway-Crittenden-Lyon-Trigg-Caldwell-
Union KY-Webster-Hopkins-Christian-Henderson-Daviess-McLean-
Muhlenberg-Todd-Perry MO-Bollinger-Cape Girardeau-Wayne MO-Carter-
Ripley-Butler-Stoddard-Scott-Mississippi-New Madrid-
143 PM CDT Mon Jul 7 2025 /243 PM EDT Mon Jul 7 2025/

This Hazardous Weather Outlook is for portions of southern
Illinois, southwest Indiana, western Kentucky, and southeast
Missouri.

.DAY ONE...This Afternoon and Tonight

Scattered thunderstorms are expected today. Any storms will have
heavy rain and lightning as their primary hazard. Localized
flooding is possible along with gusty winds.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Unsettled weather continues through the rest of this week with
daily chances of showers and storms. Tuesday in particular may see
slightly stronger storms with locally strong winds as the primary
risk. Outside of Tuesday, storms this week will have heavy rain
as their primary hazards with lightning and gusty winds as
potential hazards.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

DW

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

10 dense fog. Local standard time, as filed.

Dense Fog, Saline

When: July 8, 12:30 AM CST to 5:00 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, Pope

When: July 8, 1:30 AM CST to 6:00 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, Massac

When: July 8, 1:30 AM CST to 6:00 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, Williamson

When: July 8, 2:00 AM CST to 6:00 AM CST
Where: Williamson forecast zone
Reported by: AWOS
Coordinates: 37.730, -88.930 (the zone’s center; the record gives no point)

Dense Fog, Gallatin

When: July 8, 2:00 AM CST to 5:00 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, Hardin

When: July 8, 2:00 AM CST to 5:00 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, Johnson

When: July 8, 2:00 AM CST to 6:00 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: July 8, 2:00 AM CST to 6:00 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, Alexander

When: July 8, 4:00 AM CST to 6:00 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, Pulaski

When: July 8, 4:00 AM CST to 6:00 AM CST
Where: Pulaski forecast zone
Reported by: AWOS
Coordinates: 37.223, -89.127 (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

Every storm in Illinois in 2025 Every state in 2025 This day in weather history Warnings in Illinois, July 2025

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: 1285228, 1285231, 1285236, 1285227, 1285229, 1285230, 1285232, 1285233, 1285234, 1285235.