Alert archive / Illinois / Wind Advisories in 2026

Wind Advisory 1, NWS Chicago, IL

January 21, 20266 counties in Illinois; Benton County, Jasper County, Newton County, Indiana

NWS Chicago, IL issued this wind advisory at Jan 21, 2026, 4:42 PM CST for 6 counties in Illinois; Benton County, Jasper County, Newton County, Indiana. It took effect at Jan 21, 2026, 6:00 PM CST. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Jan 21, 2026, 4:42 PM CST (22:42 UTC)
In effect from
Jan 21, 2026, 6:00 PM CST
Expired
Jan 22, 2026, 12:00 AM CST
In force
6 hr
Issued by
NWS Chicago, IL

Counties Ford County, IL, Grundy County, IL, Iroquois County, IL, Kankakee County, IL, LaSalle County, IL, Livingston County, IL, Benton County, IN, Jasper County, IN, Newton County, IN

The radar

The Chicago radar (KLOT), 73 km from the middle of the area, began a volume at 22:44 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 12:00Z, 10.7 hours before the alert went out and 105 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-pSkew-T log-p diagram, Lincoln, IL at 12:00Z on 2026-01-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2026-01-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 183 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
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
1849 m above ground
0-6 km bulk shear
82 kt
0-1 km storm-relative helicity
183 m²/s²
0-3 km storm-relative helicity
398 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 20, 9:49 PM CSTGale WarningLOT30 hr
Jan 21, 3:01 AM CSTExtreme Cold WatchLOTBoone, Cook, DeKalb, DuPage, Grundy, Kane and 10 more24 hr
Jan 21, 4:10 AM CSTSmall Craft AdvisoryLOT15 hr
Jan 21, 4:10 AM CSTHeavy Freezing Spray WarningLOT24 hr

Nearby

Wind Advisories in Illinois, 2026Wind Advisories in Indiana, 2026Every wind advisory 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.