Alert archive / Illinois / Beach Hazards Statements in 2026

Beach Hazards Statement 16, NWS Chicago, IL

September 18, 2026Cook County, Lake County, Illinois

NWS Chicago, IL issued this beach hazards statement at Sep 18, 2026, 3:02 PM CDT for Cook County, Lake County, Illinois. It took effect at Sep 18, 2026, 10:00 PM CDT. It was in force for 21 hr.

The area

The counties it named.

The facts

Issued
Sep 18, 2026, 3:02 PM CDT (20:02 UTC)
In effect from
Sep 18, 2026, 10:00 PM CDT
Expired
Sep 19, 2026, 7:00 PM CDT
In force
21 hr
Issued by
NWS Chicago, IL

Counties Cook County, IL, Lake County, IL

The radar

The Chicago radar (KLOT), 64 km from the middle of the area, began a volume at 20:03 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, 8.0 hours before the alert went out and 230 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 2026-09-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 637 joules per kilogram.LCLLFCEL10008507005003002001001 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 2026-09-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 square meters per square second.1939Sfc1 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
637 J/kg
Mixed-layer CIN
-154 J/kg
Mixed-layer LCL
548 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
136 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.9

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 18, 1:47 PM CDTFlood WatchLOTBoone, Cook, DeKalb, DuPage, Grundy, Kane and 9 more47 hr
Sep 18, 3:06 PM CDTSmall Craft AdvisoryLOT24 hr

Nearby

Beach Hazards Statements in Illinois, 2026Every beach hazards statement 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.