Alert archive / Missouri / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 87, NWS St. Louis, MO

April 19, 2000Saint Louis County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 19, 2000, 6:19 PM CDT for Saint Louis County, Missouri. It was in force for 46 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
Apr 19, 2000, 6:19 PM CDT (23:19 UTC)
Expired
Apr 19, 2000, 7:05 PM CDT
In force
46 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Saint Louis County, MO

The watch it was issued in

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

IssuedProductOfficeLasted
Apr 19, 4:30 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.3 hours before the alert went out and 231 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 12:00Z on 2000-04-19Temperature 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 12:00Z on 2000-04-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 107 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
1658 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
107 m²/s²
0-3 km storm-relative helicity
306 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.

505 
WUUS53 KLSX 192319
SVRSTL
MOC189-200005-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
619 PM CDT WED APR 19 2000

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

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

* UNTIL 705 PM CDT

* AT 617 PM CDT...SEVERE STORM SPOTTERS INDICATED A SEVERE
  THUNDERSTORM ALONG THE ST. CHARLES COUNTY FRANKLIN COUNTY LINE
  NEAR WASHINGTON...MOVING NORTHEAST AT 50 MPH.

* LOCATIONS THAT WILL BE AFFECTED...
  CHESTERFIELD
  BRIDGETON
  FLORISSANT

GOLFBALL SIZE HAIL WAS REPORTED NEAR WASHINGTON MISSOURI

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.

A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. SEVERE
THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING.

JPK


&

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 19, 4:04 PM CDTSevere Thunderstorm WarningLSXCole, Moniteau46 min
Apr 19, 4:23 PM CDTSevere Thunderstorm WarningLSXBoone32 min
Apr 19, 4:29 PM CDTSevere Thunderstorm WarningLSXCallaway31 min
Apr 19, 6:15 PM CDTSevere Thunderstorm WarningLSXSaint Charles30 min
Apr 19, 6:37 PM CDTTornado WarningLSXSaint Charles, Saint Louis33 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2000Every severe thunderstorm warning in 2000

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.