Alert archive / Illinois / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 39, NWS Lincoln, IL

June 21, 1997Cumberland County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jun 21, 1997, 5:33 PM CDT for Cumberland County, Illinois. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 21, 1997, 5:33 PM CDT (22:33 UTC)
Expired
Jun 21, 1997, 6:15 PM CDT
In force
42 min
Issued by
NWS Lincoln, IL
Area
Whole counties

County Cumberland County, IL

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.6 hours before the alert went out and 102 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 1997-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3170 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 1997-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 187 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
3170 J/kg
Mixed-layer CIN
-37 J/kg
Mixed-layer LCL
624 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
187 m²/s²
0-3 km storm-relative helicity
146 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

967 
WUUS1 KSPI 212235 RRA
SVRSPI
ILC035-212315-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
533 PM CDT SAT JUN 21 1997

* SEVERE THUNDERSTORM WARNING FOR
  CUMBERLAND COUNTY - IN EAST CENTRAL ILLINOIS

* UNTIL 615 PM CDT
 
* SOME LOCATIONS AFFECTED
  TOLEDO
  GREENUP

* AT 535 PM CDT LINCOLN DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM 7 MILES SOUTHEAST OF MATTOON NEAR THE TOWN OF
  TOLEDO...MOVING EAST AT 20 MPH.

THIS STORM IS CAPABLE OF PRODUCING LARGE HAIL. GET INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS.


UTHLAUT

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 5:23 PM CDTSevere Thunderstorm WarningILXClark, Edgar37 min
Jun 21, 6:01 PM CDTSevere Thunderstorm WarningILXClark, Edgar59 min
Jun 21, 6:13 PM CDTSevere Thunderstorm WarningILXEffingham, Jasper47 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1997Every severe thunderstorm warning in 1997

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.