Alert archive / Missouri / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 94, NWS St. Louis, MO

April 20, 2000Crawford County, Gasconade County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 20, 2000, 3:38 AM CDT for Crawford County, Gasconade County, Missouri. It was in force for 52 min. 3 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Apr 20, 2000, 3:38 AM CDT (08:38 UTC)
Expired
Apr 20, 2000, 4:30 AM CDT
In force
52 min
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Crawford County, MO, Gasconade County, MO

What was reported inside it

TimeReportWhereRemark
Apr 20, 4:10 AM CDTThunderstorm Wind 62 EOwensville, MOThe Sheriff Department reported trees down in Owensville.
Apr 20, 4:25 AM CDTThunderstorm Wind 62 EMorrison, MO
Apr 20, 4:30 AM CDTThunderstorm Wind 62 EHermann, MO

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

IssuedProductOfficeLasted
Apr 19, 10:00 PM CDTTornado WatchSPC6 hr
Apr 20, 3:15 AM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 8.6 hours before the alert went out and 256 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 2000-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1428 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, Springfield, MO at 00:00Z on 2000-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 131 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
1428 J/kg
Mixed-layer CIN
-113 J/kg
Mixed-layer LCL
1062 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
131 m²/s²
0-3 km storm-relative helicity
247 m²/s²
Significant tornado parameter
1.2
Supercell composite
12.7

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLSX 200838
SVRSTL
MOC055-073-200930-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
338 AM CDT THU APR 20 2000

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CRAWFORD COUNTY IN EAST CENTRAL MISSOURI
  GASCONADE COUNTY IN EAST CENTRAL MISSOURI

* UNTIL 430 AM CDT

* AT 335 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM VICHY TO SALEM... MOVING
  NORTHEAST AT 60 MPH.

* LOCATIONS THAT WILL BE AFFECTED...
  HERMANN
  OWENSVILLE
  CUBA
  STEELVILLE
  BOURBON



THIS STORM HAS A HISTORY OF DAMAGING WINDS. MOVE QUICKLY TO A
STURDY BUILDING AND STAY AWAY FROM DOORS AND WINDOWS.

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

WDB

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 19, 7:00 PM CDTSevere Thunderstorm WarningLSXPike35 min
Apr 19, 8:01 PM CDTSevere Thunderstorm WarningLSXMontgomery34 min
Apr 19, 8:31 PM CDTSevere Thunderstorm WarningLSXPike19 min
Apr 19, 8:57 PM CDTSevere Thunderstorm WarningLSXPike33 min
Apr 20, 3:21 AM CDTSevere Thunderstorm WarningLSXCole, Osage54 min
Apr 20, 3:50 AM CDTSevere Thunderstorm WarningLSXIron, Reynolds65 min
Apr 20, 3:53 AM CDTSevere Thunderstorm WarningLSXCallaway, Montgomery47 min
Apr 20, 4:02 AM CDTSevere Thunderstorm WarningLSXFranklin, Warren63 min
Apr 20, 4:02 AM CDTSevere Thunderstorm WarningLSXWashington63 min
Apr 20, 4:16 AM CDTSevere Thunderstorm WarningLSXLincoln, Pike64 min
Apr 20, 4:20 AM CDTSevere Thunderstorm WarningLSXSaint Louis, City of Saint Louis50 min
Apr 20, 4:20 AM CDTSevere Thunderstorm WarningLSXSaint Charles50 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.