Alert archive / Illinois / Flash Flood Warnings in 2026
Flash Flood Warning 53, NWS Chicago, IL
NWS Chicago, IL issued this flash flood warning at Aug 14, 2026, 1:21 AM CDT for Ford County, Iroquois County, Illinois. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 14, 2026, 1:21 AM CDT (06:21 UTC)
- Expired
- Aug 14, 2026, 7:15 AM CDT
- In force
- 6 hr
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Ford County, IL, Iroquois County, IL
The radar
The Chicago radar (KLOT), 104 km from the middle of the area, began a volume at 06:24 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 6.4 hours before the alert went out and 76 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 514 J/kg
- Mixed-layer CIN
- -241 J/kg
- Mixed-layer LCL
- 1327 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 258 m²/s²
- 0-3 km storm-relative helicity
- 440 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 11:35 PM CDT | Areal Flood Advisory | LOT | Grundy, LaSalle | 3 hr |
| Aug 14, 12:06 AM CDT | Areal Flood Advisory | LOT | Ford, Iroquois | 3 hr |
| Aug 14, 12:48 AM CDT | Flash Flood Warning | LOT | Ford, Iroquois | 3 hr |
| Aug 14, 1:09 AM CDT | Areal Flood Advisory | LOT | Ford, Iroquois, Livingston | 5 hr |
| Aug 14, 7:13 AM CDT | Areal Flood Warning | LOT | Ford, Iroquois | 15 hr |
| Aug 14, 8:16 AM CDT | River Flood Warning | LOT | Cook | 42 hr |
| Aug 14, 12:01 PM CDT | Flood Watch | LOT | Cook, DeKalb, DuPage, Ford, Grundy, Iroquois and 8 more | 22 hr |
| Aug 14, 12:34 AM CDT | Areal Flood Advisory | LOT | Benton | 5 hr |
| Aug 14, 8:16 AM CDT | River Flood Warning | LOT | Lake, Newton | 4 days |
Nearby
Flash Flood Warnings in Illinois, 2026Every flash flood warning in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.