Alert archive / Illinois / Red Flag Warnings in 2025

Red Flag Warning 2, NWS Chicago, IL

March 14, 202518 counties in Illinois; 5 counties in Indiana

NWS Chicago, IL issued this red flag warning at Mar 14, 2025, 4:11 AM CDT for 18 counties in Illinois; 5 counties in Indiana. It took effect at Mar 14, 2025, 1:00 PM CDT. It was in force for 11 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: Mar 14, 2025, 4:11 AM CDT (09:11 UTC)
In effect from: Mar 14, 2025, 1:00 PM CDT
Expired: Mar 15, 2025, 12:00 AM CDT
In force: 11 hr
Issued by: NWS Chicago, IL

All 23 counties

Boone County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Ford County, IL, Grundy County, IL, Iroquois County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, McHenry County, IL, Ogle County, IL, Will County, IL, Winnebago County, IL, Benton County, IN, Jasper County, IN, Lake County, IN, Newton County, IN, Porter County, IN

The radar

The Chicago radar (KLOT), 12 km from the middle of the area, began a volume at 09:12 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, 9.2 hours before the alert went out and 158 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2500 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this red flag warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Chicago, IL wrote its last area forecast discussion before this red flag warning went out at Mar 14, 3:51 AM CDT, 20 minutes earlier.

Area forecast discussion, Mar 14, 3:51 AM CDT, 20 minutes before

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Hazardous weather outlook, Mar 13, 6:39 PM CDT, 9 hours 32 minutes before

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The office that day

Everything else NWS Chicago, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 14, 2:26 PM CDT	High Wind Warning	LOT	Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more	18 hr
Mar 14, 2:26 PM CDT	Wind Advisory	LOT	Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more	26 hr
Mar 14, 4:00 PM CDT	Storm Warning	LOT		17 hr

Nearby

Red Flag Warnings in Illinois, 2025 Red Flag Warnings in Indiana, 2025 Every red flag warning in 2025

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.