Alert archive / Illinois / Tornado Warnings in 1993

Tornado Warning 4, NWS Chicago, IL

June 24, 1993Cook County, Will County, Illinois

NWS Chicago, IL issued this tornado warning at Jun 24, 1993, 3:35 PM CDT for Cook County, Will County, Illinois. It was in force for 25 min.

The area

The counties it named.

The facts

Issued
Jun 24, 1993, 3:35 PM CDT (20:35 UTC)
Expired
Jun 24, 1993, 4:00 PM CDT
In force
25 min
Issued by
NWS Chicago, IL
Area
Whole counties

Counties Cook County, IL, Will County, IL

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.6 hours before the alert went out and 313 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, Green Bay/Straub, WI at 12:00Z on 1993-06-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 53 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, Green Bay/Straub, WI at 12:00Z on 1993-06-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 square meters per square second.193958Sfc1 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
53 J/kg
Mixed-layer CIN
-122 J/kg
Mixed-layer LCL
1167 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
67 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 24, 3:04 PM CDTSevere Thunderstorm WarningLOTFord, Grundy, Kankakee, Livingston41 min

Nearby

Tornado Warnings in Illinois, 1993Every tornado warning in 1993Tornadoes in 1993

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.