Alert archive / Missouri / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 92, NWS St. Louis, MO

September 27, 1990Monroe County, Shelby County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Sep 27, 1990, 10:47 PM CDT for Monroe County, Shelby County, Missouri. It was in force for 58 min.

The area

The counties it named.

The facts

Issued
Sep 27, 1990, 10:47 PM CDT (03:47 UTC)
Expired
Sep 27, 1990, 11:45 PM CDT
In force
58 min
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Monroe County, MO, Shelby County, MO

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

Topeka, KS (KTOP), launched 00:00Z, 3.8 hours before the alert went out and 318 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, Topeka, KS at 00:00Z on 1990-09-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 902 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, Topeka, KS at 00:00Z on 1990-09-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 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
902 J/kg
Mixed-layer CIN
-183 J/kg
Mixed-layer LCL
2024 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
162 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.

000 
TTAA00 KSTL 280347
SVRSTL
MOC137-205-280445-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1047 PM CDT THU SEP 27 1990
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1145 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN NORTHEAST MISSOURI
          ...MONROE...SHELBY
 
AT 1045 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS THAT
EXTENDED NEAR THE MACON-SHELBY COUNTY LINE. A STRONG THUNDERSTORM
WAS LOCATED NEAR CLARENCE.  CLARENCE IS ABOUT 15 MILES EAST OF MACON.
 
THE STORMS WERE MOVING TO THE EAST AROUND 25 MPH.  THESE STORMS HAVE
A HISTORY OF VERY STRONG WINDS.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

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, Sep 27, 10:15 PM CDT, 32 minutes before
MOZ006-280400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA MO
1010 PM CDT THU SEP 28 1990

...STRONG THUNDERSTORMS MOVING THROUGH NORTH CENTRAL MISSOURI...
AT 1000 PM CDT RADAR SHOWED A BAND OF THUNDERSTORMS WITH STRONG AND
GUSTY WINDS MOVING EASTWARD THROUGH THE NORTH COUNTIES OF CENTRAL
MISSOURI.
THE AREA WAS ABOUT 30 MILES WIDE AND WEST OF A LINE EXTENDING FROM
ABOUT 40 MILES NORTHWEST OF COLUMBIA TO MACON TO ABOUT 20 MILES EAST
OF KIRKSVILLE.
OFFICIALS IN MACON COUNTY REPORTED LARGE TREE KNOCKED DOWN BY STRONG
WINDS JUST NORTH OF BUCKLIN...ALONG THE LINN AND MACON COUNTY LINE.

THESE THUNDERSTORMS WERE MOVING TO THE EAST AROUND 35 MILES AN HOUR
AND WILL CONTINUE TO PRODUCE STRONG AND GUSTY WINDS ALONG WITH BRIEF
DOWNPOURS AND POSSIBLY SOME HAIL.
OTHER THUNDERSTORMS WITH DANGEROUS LIGHTENING AND STRONG WINDS
WERE IN AN AREA ABOUT 20 MILES WIDE AND WEST OF A LINE FROM JUST
WEST OF SEDALIA TO JUST NORTH OF GLASGOW...ABOUT 35 MILES NORTHWEST
OF COLUMBIA.
THESE THUNDERSTORMS WERE ALSO MOVING TO THE EAST AROUND 30 MILES
AN HOUR.

Nearby

Severe Thunderstorm Warnings in Missouri, 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.