Alert archive / Missouri / Flash Flood Warnings in 2000

Flash Flood Warning 4, NWS St. Louis, MO

May 7, 2000Franklin County, Saint Charles County, Saint Louis County, Missouri

NWS St. Louis, MO issued this flash flood warning at May 7, 2000, 6:32 AM CDT for Franklin County, Saint Charles County, Saint Louis County, Missouri. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 7, 2000, 6:32 AM CDT (11:32 UTC)
Expired
May 7, 2000, 9:00 AM CDT
In force
2 hr
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Franklin County, MO, 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 11:35 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, 11.5 hours before the alert went out and 251 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 2000-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 178 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2000-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 square meters per square second.1939Sfc1 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
178 J/kg
Mixed-layer CIN
-54 J/kg
Mixed-layer LCL
1032 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
47 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 
WGUS53 KLSX 071131
FFWLSX
MOC071-183-189-071400-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
632 AM CDT SUN MAY 7 2000

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  FRANKLIN COUNTY IN EAST CENTRAL MISSOURI
  SOUTHERN ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI
  ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI

* UNTIL 900 AM CDT

* AT 600 AM NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  COMPLEX OF THUNDERSTORMS WHICH HAS BEEN EDGING EASTWARD EVER SO
  SLOWLY THROUGH THE NIGHT. THE CENTER OF THE STORMS WAS IN A SHORT
  LINE FROM 35 MILES WEST OF ST LOUIS TO 40 MILES SOUTH OF ST LOUIS.
  THESE STORMS WILL EDGE SLOWLY TO THE SOUTHEAST TOWARD THE ST LOUIS
  AREA.

* CATASTROPHIC FLOODING WILL CONTINUE THROUGH MUCH OF FRANKLIN
  COUNTY.
  AREAS NEAR AUGUSTA IN ST CHARLES COUNTY...AND WEST ST LOUIS
  COUNTY,
  INCLUDING CHESTERFIELD...WILDWOOD...TO PACIFIC...CAN EXPECT 3 TO 8
  INCHES OF RAINFALL TOTALS THIS MORNING.

  MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER ATTEMPT TO
  CROSS BRIDGES...DIPS...OR LOW-WATER CROSSINGS IF WATER COVERS THE
  ROAD. DO NOT DRIVE AROUND BARRICADES. IF YOUR VEHICLE STALLS
  ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND. RAPIDLY RISING
  WATER MAY SWEEP THE VEHICLE AND ITS OCCUPANTS AWAY.

  PEDIGO/BRITT

The office that day

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

IssuedProductOfficeCountiesLasted
May 7, 12:53 AM CDTFlash Flood WarningLSXFranklin, Gasconade5 hr
May 7, 2:05 AM CDTSevere Thunderstorm WarningLSXFranklin55 min
May 7, 2:23 AM CDTFlash Flood WarningLSXSaint Charles, Saint Louis5 hr
May 7, 4:22 AM CDTSevere Thunderstorm WarningLSXFranklin, Washington38 min
May 7, 4:49 AM CDTFlash Flood WarningLSXJefferson4 hr

Nearby

Flash Flood Warnings in Missouri, 2000Every flash flood 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; radar from the NEXRAD Level II archive.