Alert archive / Illinois / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 19, NWS St. Louis, MO

April 26, 1989Adams County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 26, 1989, 8:39 PM CDT for Adams County, Illinois. It was in force for 36 min.

The area

The counties it named.

The facts

Issued
Apr 26, 1989, 8:39 PM CDT (01:39 UTC)
Expired
Apr 26, 1989, 9:15 PM CDT
In force
36 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Adams 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, 1.7 hours before the alert went out and 154 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 KSTL 270138
SVRSTL
ILC001-270215-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
839 PM CDT WED APR 26 1989
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  915 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN WEST CENTRAL ILLINOIS
          ...ADAMS
 
AT 835 PM CDT...WINDS OF 45 TO 50 MPH WERE REPORTED IN QUINCY IN ADAMS
COUNTY. AT 825 PM CDT...A HOME WAS DAMAGED ABOUT 10 MILES NORTH OF
QUINCY.
 
THESE STORMS WERE MOVING TO THE SOUTHEAST AROUND 40 MPH.
 
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DON'T USE TELEPHwONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Apr 26, 7:58 PM CDT, 41 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
750 PM CDT WED APR 26 1989

...TORNADO WATCH REMAINS IN EFFECT UNTIL 11 PM FOR EXTREME NORTH
MISSOURI...

AT 750 PM...THE SHERIFFS OFFICE IN CAHOKA IN CLARK COUNTY IN NORTHEAST
MISSOURI REPORTED A STRONG THUNDERSTORM WITH STRONG WINDS.  NO REPORTS
OF SEVERE WEATHER HAVE BEEN REPORTED TO THE NATIONAL WEATHER SERVICE
AT THIS TIME.

PERSONS IN CLARK COUNTY SHOULD REMAIN ALE:RT FOR THE POSSIBILITY OF
SEVERE WEATHER THIS EVENING.  A FEW OF THESE THUNDERSTORMS WERE SEVERE
AS THEY MOVED ACROSS IOWA.  THE WEATHER OFFICE IN PEORIA REPORTED
A WIND GUST TO 69 MPH AT 750 PM.

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 26, 8:47 PM CDTSevere Thunderstorm WarningLSXBrown28 min
Apr 26, 9:28 PM CDTSevere Thunderstorm WarningLSXPike32 min
Apr 26, 10:32 PM CDTTornado WarningLSXGreene28 min
Apr 26, 10:47 PM CDTSevere Thunderstorm WarningLSXAdams, Pike28 min
Apr 26, 10:57 PM CDTSevere Thunderstorm WarningLSXJersey, Madison33 min
Apr 26, 10:57 PM CDTSevere Thunderstorm WarningLSXCalhoun33 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.