Alert archive / Illinois / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 13, NWS Chicago, IL

May 9, 1995DuPage County, Illinois

NWS Chicago, IL issued this severe thunderstorm warning at May 9, 1995, 7:26 PM CDT for DuPage County, Illinois. It was in force for 64 min.

The area

The counties it named.

The facts

Issued
May 9, 1995, 7:26 PM CDT (00:26 UTC)
Expired
May 9, 1995, 8:30 PM CDT
In force
64 min
Issued by
NWS Chicago, IL
Area
Whole counties

County DuPage County, IL

The radar

The Chicago radar (KLOT), 28 km from the middle of the area, began a volume at 00:27 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

Davenport, (KDVN), launched 00:00Z, 0.4 hours before the alert went out and 202 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, Davenport, at 00:00Z on 1995-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 173 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, Davenport, at 00:00Z on 1995-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -133 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
173 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
711 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
-133 m²/s²
0-3 km storm-relative helicity
-75 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KCHI 100028
SVRCHI
ILC037-043-089-197-100130-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHICAGO IL
726 PM CDT TUE MAY 9 1995
 
THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  830 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTH CENTRAL ILLINOIS
 
   ...EASTERN DE KALB COUNTY
 
IN NORTHEAST ILLINOIS
 
   ...DU PAGE COUNTY...KANE COUNTY...NORTHERN WILL COUNTY
 
AT 725 PM WEATHER SERVICE RADAR SHOWED A LINE OF SEVERE THUNDERSTORMS
FROM JOLIET TO DEKALB. THE STORMS WERE MOVING NORTH-NORTHEAST AT 30 MPH
AND HAVE A HISTORY OF PRODUCING LARGE HAIL.
 
 
GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS!  A TORNADO
WATCH IS IN EFFECT.  SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES.

The office that day

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

IssuedProductOfficeCountiesLasted
May 9, 7:26 PM CDTSevere Thunderstorm WarningLOTWill19 min
May 9, 7:26 PM CDTSevere Thunderstorm WarningLOTDeKalb, Kane64 min
May 9, 7:38 PM CDTTornado WarningLOTFord, Livingston67 min
May 9, 8:42 PM CDTTornado WarningLOTFord, Iroquois48 min
May 10, 2:13 PM CDTTornado WarningLOTKankakee17 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1995Every severe thunderstorm warning in 1995

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.