Alert archive / Illinois / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 49, NWS Chicago, IL

June 28, 1993DuPage County, Kane County, Illinois

NWS Chicago, IL issued this severe thunderstorm warning at Jun 28, 1993, 2:44 AM CDT for DuPage County, Kane County, Illinois. It was in force for 61 min.

The area

The counties it named.

The facts

Issued
Jun 28, 1993, 2:44 AM CDT (07:44 UTC)
Expired
Jun 28, 1993, 3:45 AM CDT
In force
61 min
Issued by
NWS Chicago, IL
Area
Whole counties

Counties DuPage County, IL, Kane County, IL

The nearest sounding before it

Dayton/James M C, OH (KDAY), launched 00:00Z, 7.7 hours before the alert went out and 407 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 1993-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1440 joules per kilogram.LCLEL10008507005003002001001 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 1993-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 square meters per square second.19395878Sfc1 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
1440 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
1291 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
45 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.7

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 27, 11:23 PM CDTSevere Thunderstorm WarningLOTGrundy, LaSalle52 min
Jun 27, 11:44 PM CDTSevere Thunderstorm WarningLOTWill61 min
Jun 28, 12:13 AM CDTSevere Thunderstorm WarningLOTKankakee62 min
Jun 28, 12:29 AM CDTSevere Thunderstorm WarningLOTCook61 min
Jun 28, 12:53 AM CDTSevere Thunderstorm WarningLOTIroquois67 min
Jun 28, 2:37 AM CDTSevere Thunderstorm WarningLOTCook53 min
Jun 28, 4:16 AM CDTSevere Thunderstorm WarningLOTLaSalle59 min
Jun 28, 1:08 AM CDTSevere Thunderstorm WarningLOTPorter52 min
Jun 28, 3:16 AM CDTSevere Thunderstorm WarningLOTPorter29 min
Jun 28, 3:52 AM CDTSevere Thunderstorm WarningLOTLake, Porter28 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1993Every severe thunderstorm warning 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.