Alert archive / Illinois / Tornado Warnings in 1991

Tornado Warning 1, NWS Chicago, IL

March 22, 1991Kankakee County, Will County, Illinois

NWS Chicago, IL issued this tornado warning at Mar 22, 1991, 11:01 PM CST for Kankakee County, Will County, Illinois. It was in force for 44 min.

The area

The counties it named.

The facts

Issued
Mar 22, 1991, 11:01 PM CST (05:01 UTC)
Expired
Mar 22, 1991, 11:45 PM CST
In force
44 min
Issued by
NWS Chicago, IL
Area
Whole counties

Counties Kankakee County, IL, Will County, IL

The nearest sounding before it

Dayton/James M C, OH (KDAY), launched 00:00Z, 5.0 hours before the alert went out and 350 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, Dayton/James M C, OH at 00:00Z on 1991-03-23Temperature 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 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Dayton/James M C, OH at 00:00Z on 1991-03-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 square meters per square second.1939587897Sfc1 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
1163 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
173 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
Mar 22, 9:59 PM CSTSevere Thunderstorm WarningLOTLivingston61 min
Mar 22, 10:23 PM CSTSevere Thunderstorm WarningLOTGrundy, Kankakee, Will52 min

Nearby

Tornado Warnings in Illinois, 1991Every tornado warning in 1991Tornadoes in 1991

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.