Alert archive / Illinois / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 21, NWS Lincoln, IL

April 26, 1989Macoupin County, Montgomery County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Apr 26, 1989, 10:14 PM CDT for Macoupin County, Montgomery County, Illinois. It was in force for 61 min.

The area

The counties it named.

The facts

Issued
Apr 26, 1989, 10:14 PM CDT (03:14 UTC)
Expired
Apr 26, 1989, 11:15 PM CDT
In force
61 min
Issued by
NWS Lincoln, IL
Area
Whole counties

Counties Macoupin County, IL, Montgomery County, IL

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Peoria Regional, IL (KPIA), launched 00:00Z, 3.2 hours before the alert went out and 159 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, Peoria Regional, IL at 00:00Z on 1989-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1526 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, Peoria Regional, IL at 00:00Z on 1989-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 square meters per square second.1939Sfc1 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
1526 J/kg
Mixed-layer CIN
-61 J/kg
Mixed-layer LCL
1669 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
111 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSPI 270314
SVRSPI
ILC117-021-135-173-270415-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE SPRINGFIELD IL
1014 PM CDT WED APR 26 1989

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1115 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE CENTRAL PART OF ILLINOIS
      MACOUPIN...CHRISTIAN...MONTGOMERY...SHELBY

 AT 1007 PM CDT WEATHER SERVICE RADARS SHOWS THE LEADING EDGE OF
 A LINE OF SEVERE THUNDERSTORMS FROM 10 MILES NORTHWEST OF
 CHAMPAIGN TO 10 MILES SOUTH OF DECATUR ..10 MILES SOUTH OF
 SPRINGFIELD  TO NEAR JACKSONVILLE ILLINOIS.

 ANOTHER LINE OF SEVERE THUNDERSTORMS EXTENDS FROM TO SOUTH OF
 PETERSBURG ILLINOIS TO 20 MILES WEST OF SPRINGFIELD.

THE SEVERE THUNDERSTORMS WERE MOVING SOUTHEAST AT 40 MPH.

IF YOU ARE IN AN AREA THREATENED BY THE STORM..GO TO A REINFORCED
SHELTER AND PREPARE FOR DAMAGING WIND...LARGE HAIL...VERY HEAVY
RAIN AND DANGEROUS LIGHTNING.

REMEMBER...SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
A TORNADO WITH LITTLE OR NO ADVANCE WARNING SO BE ON THE LOOKOUT.

THIS IS A DANGEROUS STORM. TAKE COVER IMMEDIATELY.

 ATTN ISP DIST...9 AND 18
 HILLIARDD

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 26, 7:28 PM CDTSevere Thunderstorm WarningILXMarshall, Peoria, Woodford47 min
Apr 26, 7:44 PM CDTSevere Thunderstorm WarningILXPeoria, Tazewell, Woodford46 min
Apr 26, 8:04 PM CDTSevere Thunderstorm WarningILXMcLean41 min
Apr 26, 8:18 PM CDTSevere Thunderstorm WarningILXHancock, McDonough, Schuyler42 min
Apr 26, 8:47 PM CDTSevere Thunderstorm WarningILXMcLean28 min
Apr 26, 9:08 PM CDTSevere Thunderstorm WarningILXFulton, McDonough, Schuyler37 min
Apr 26, 9:21 PM CDTSevere Thunderstorm WarningILXDeWitt, Piatt69 min
Apr 26, 9:46 PM CDTSevere Thunderstorm WarningILXMacon, Sangamon59 min
Apr 26, 9:46 PM CDTSevere Thunderstorm WarningILXMorgan59 min
Apr 26, 9:57 PM CDTSevere Thunderstorm WarningILXDouglas, Moultrie63 min
Apr 26, 9:57 PM CDTSevere Thunderstorm WarningILXChampaign63 min
Apr 26, 10:14 PM CDTSevere Thunderstorm WarningILXChristian, Shelby61 min
Apr 26, 10:39 PM CDTSevere Thunderstorm WarningILXClark, Coles, Cumberland, Edgar66 min
Apr 26, 11:06 PM CDTSevere Thunderstorm WarningILXMacoupin, Morgan, Sangamon69 min
Apr 26, 11:06 PM CDTSevere Thunderstorm WarningILXChristian, Montgomery69 min
Apr 26, 11:06 PM CDTSevere Thunderstorm WarningILXMacon69 min
Apr 26, 11:49 PM CDTSevere Thunderstorm WarningILXMoultrie, Shelby56 min
Apr 27, 12:02 AM CDTSevere Thunderstorm WarningILXClark, Edgar58 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1989Every severe thunderstorm warning in 1989

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.