Alert archive / Missouri / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 257, NWS St. Louis, MO

June 19, 1998Saint Charles County, Saint Louis County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 19, 1998, 11:39 PM CDT for Saint Charles County, Saint Louis County, Missouri. It was in force for 61 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 19, 1998, 11:39 PM CDT (04:39 UTC)
Expired
Jun 20, 1998, 12:40 AM CDT
In force
61 min
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Saint Charles County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 11 km from the middle of the area, began a volume at 04:40 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 nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 4.7 hours before the alert went out and 232 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, Lincoln, IL at 00:00Z on 1998-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Lincoln, IL at 00:00Z on 1998-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2156 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
99 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.

038 
WUUS1 KSTL 200438 RRA
SVRSTL
MOC183-189-200540-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1139 PM CDT FRI JUN 19 1998

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ST CHARLES COUNTY IN EAST CENTRAL MISSOURI
  ST LOUIS COUNTY IN EAST CENTRAL MISSOURI

* UNTIL 1240 AM CDT

* AT 1140 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM MARTHASVILLE TO NEAR ST CLAIR...
  MOVING EAST NORTHEAST AT 25 MPH.

* LOCATIONS THAT WILL BE AFFECTED...
  ST CHARLES
  DEFIANCE
  NEW MELLE
  BALLWIN
  CHESTERFIELD
  ST PETERS

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND GUSTS IN EXCESS OF 60
MPH...DAMAGING HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. MOVE
TO AN INTERIOR ROOM ON THE LOWEST FLOOR OR YOUR HOME OR BUSINESS.
HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE
WATER COVERS THE ROAD.



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 20, 1:38 AM CDTSevere Thunderstorm WarningLSXCole, Osage62 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.