Alert archive / Missouri / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 261, NWS St. Louis, MO

June 20, 1998Cole County, Osage County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 20, 1998, 1:38 AM CDT for Cole County, Osage County, Missouri. It was in force for 62 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 20, 1998, 1:38 AM CDT (06:38 UTC)
Expired
Jun 20, 1998, 2:40 AM CDT
In force
62 min
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Cole County, MO, Osage County, MO

The radar

The St Louis radar (KLSX), 123 km from the middle of the area, began a volume at 06:38 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 19, 10:30 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 6.6 hours before the alert went out and 233 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, Springfield, MO at 00:00Z on 1998-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2710 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 1998-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 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
2710 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
1096 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
201 m²/s²
Significant tornado parameter
1.8
Supercell composite
13.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 200637 RRA
SVRSTL
MOC051-135-151-200740-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
138 AM CDT SAT JUN 20 1998

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  COLE COUNTY IN CENTRAL MISSOURI
  MONITEAU COUNTY IN CENTRAL MISSOURI
  OSAGE COUNTY IN CENTRAL MISSOURI

* UNTIL 240 AM CDT

* AT 135 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM TIPTON TO HIGH POINT... MOVING
  EAST AT 50 MPH.

* LOCATIONS THAT WILL BE AFFECTED...
  HIGH POINT
  BRAZITO
  ST THOMAS
  META
  WESTAPHALIA
  FREEBURG



THE PRIMARY SEVERE WEATHER THREAT IS DAMAGING WINBDS. MOVE QUICKLY
TO A STURDY BUILDING AND STAY AWAY FROM DOORS AND WINDOWS.



FG/DM

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 10:04 PM CDTSevere Thunderstorm WarningLSXGasconade, Osage61 min
Jun 19, 10:30 PM CDTSevere Thunderstorm WarningLSXReynolds50 min
Jun 19, 11:03 PM CDTSevere Thunderstorm WarningLSXFranklin, Warren62 min
Jun 19, 11:39 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Saint Louis61 min
Jun 20, 1:38 AM CDTSevere Thunderstorm WarningLSXMoniteau62 min
Jun 20, 3:34 AM CDTSevere Thunderstorm WarningLSXJefferson, Saint Louis51 min
Jun 20, 4:39 AM CDTSevere Thunderstorm WarningLSXIron, Madison46 min
Jun 20, 12:00 PM CDTSevere Thunderstorm WarningLSXMoniteau45 min
Jun 20, 12:54 PM CDTFlash Flood WarningLSXMoniteau2 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 1998Every severe thunderstorm warning in 1998

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; radar from the NEXRAD Level II archive.