Alert archive / Illinois / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 97, NWS St. Louis, MO

November 26, 1990Clinton County, Washington County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Nov 26, 1990, 8:47 PM CST for Clinton County, Washington County, Illinois. It was in force for 43 min.

The area

The counties it named.

The facts

Issued
Nov 26, 1990, 8:47 PM CST (02:47 UTC)
Expired
Nov 26, 1990, 9:30 PM CST
In force
43 min
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Clinton County, IL, Washington 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

Paducah/Barkley, KY (KPAH), launched 00:00Z, 2.8 hours before the alert went out and 169 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, Paducah/Barkley, KY at 00:00Z on 1990-11-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 67 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, Paducah/Barkley, KY at 00:00Z on 1990-11-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 361 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
67 J/kg
Mixed-layer CIN
-74 J/kg
Mixed-layer LCL
758 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
361 m²/s²
0-3 km storm-relative helicity
448 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 270254
SVRSTL
ILC027-145-189-270330-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
847 PM CST MON NOV 26 1990
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  930 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...S...
 
IN SOUTH CENTRAL ILLINOIS
 
   ...CLINTON COUNTY...PERRY COUNTY...WASHINGTON COUNTY
 
AT 845 PM CST A LINE OF SEVERE THUNDERSTORMS WAS MOVING INTO THE
ILLINOIS COUNTIES OF CLITON..WASHINGTON AND PERRY. THE STORMS CONTAIN
STRONG DAMAGING WINDS...BRIEF HEAVY RAIN AND SMALL HAIL.
 
WIND DAMAGE TO TREES AND ROOFS WAS REPORTED IN WOOD RIVER ILLINOIS AT
755 PM CST.
 
THE LINE OF THUNDERSTORMS WAS MOVING EAST AT 40 MPH.
 
 
 
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HASN 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, Nov 26, 6:18 PM CST, 2 hours 29 minutes before
MOZALL-270300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
610 PM CST MON NOV 26 1990

...THUNDERSTORMS OVER SOUTHWEST MISSOURI WILL SPREAD NORTHEAST INTO
THE GREATER ST LOUIS AREA EARLY TONIGHT...

A PERIOD OR TWO OF SHOWERS AND THUNDERSTORMS ARE EXPECTED IN THE
GREATER ST LOUIS METRO AREA BETWEEN 630 AND 830 PM THIS EVENING.
BRIEF HEAVY RAIN AND GUSTY WINDS WILL ACCOMPANY THE THUNDERSTORMS.
WIND GUSTS OF 25 TO 45 MPH FORM THEU SOUTH ARE LIKELY AS THE STORMS
MOVE ACROSS THE METRO AREA.

LATER TONIGHT A PERIOD OR TWO OF SHOWERS AND THUNDERSHOWERS ARE
LIKELY.  TEMPERATURES SHOULD HOLD IN THE 60S THROUGHOUT THE NIGHT.

SLAUGHTER
Special weather statement, Nov 26, 8:32 PM CST, 15 minutes before
MOZALL-270330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
830 PM CST MON NOV 26 1990

...A LINE OF THUNDERSTORMS IN THE EAST ST LOUIS AND BELLEVILLE
ILLINOIS AREA WAS MOVING EAST INTO SOUTH CENTRAL ILLINOIS...

AT 830 PM CST A LINE OF STRONG THUNDERSTORMS WAS MOVING EAST THROUGH
THE ILLINOIS COUNTIES OF MADISON...ST CLAIR AND RANDOLPH.  SOME OF
THESE STORMS WERE PRODUCING VERY HEAVY RAIN...STRONG GUSTY WINDS AND
SMALL HAIL.
+
WIND GUSTS OF 30 TO 50 MPH ARE LIKELY BETWEEN 830 AND 1000 PM TONIGHT
AS THESE STORMS MOVE EAST INTO SOUTH CENTRAL ILLINOIS.

FOR THE REST OF NIGHT PERIODS OF THUNDERSTORMS ARE EXPECTED WITH BRIEF
HEAVY RAIN AND GUSTY WINDS.

SLAUGHTER

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 26, 8:47 PM CSTSevere Thunderstorm WarningLSXPerry43 min
Nov 27, 12:47 PM CSTSevere Thunderstorm WarningLSXPike43 min
Nov 27, 1:17 PM CSTSevere Thunderstorm WarningLSXAdams, Brown28 min
Nov 27, 3:02 PM CSTSevere Thunderstorm WarningLSXCalhoun, Jersey43 min
Nov 27, 3:23 PM CSTSevere Thunderstorm WarningLSXMadison67 min
Nov 27, 3:38 PM CSTTornado WarningLSXJersey37 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1990Every severe thunderstorm warning in 1990

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.