Alert archive / Missouri / Flash Flood Warnings in 2000

Flash Flood Warning 2, NWS St. Louis, MO

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

NWS St. Louis, MO issued this flash flood warning at May 7, 2000, 2:23 AM CDT for Saint Charles County, Saint Louis County, Missouri. It was in force for 5 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, 2:23 AM CDT (07:23 UTC)
Expired
May 7, 2000, 7:00 AM CDT
In force
5 hr
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 07:26 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, 7.4 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 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 070722
FFWLSX
MOC183-189-071200-

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

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

* UNTIL 700 AM CDT

* AT 200 AM NWS DOPPLER RADAR INDICATED A CLUSTER OF THUNDERSTORMS
  WHICH HAS REMAINED JUST TO THE WEST OF THE ST LOUIS METRO AREA FOR
  SEVERAL HOURS. THEY ARE NOW DEVELOPING FURTHER EASTWARD INTO
  WESTERN PORTIONS OF THE ST LOUIS METRO AREA INCLUDING CHESTERFIELD
  AND WILDWOOD...SOUTH TO NEAR I-44. ST. CHARLES COUNTY NEAR AUGUSTA
  AND DUTZOW AND OTHER AREAS NEAR THE MISSOURI RIVER. TWO TO THREE
  INCHES HAVE ALREADY FALLEN AND SEVERAL MORE INCHES OF RAIN WILL
  FALL IN SOUTHERN ST CHARLES COUNTY BEFORE MORNING.

* COPIOUS RAINS HAVE BEEN FALLING THROUGH FRANKLIN...UP TO 4 TO 8
  INCHES HAVE ALREADY FALLEN AND IT IS STILL POURING THERE. SOME
  AREAS OF THE WEST METRO AREA WILL EXPERIENCE VERY, VERY HEAVY
  RAINS AND SIGNIFICANT FLASH FLOODING IS LIKELY.  SEVERAL INCHES
  OF RAIN WILL FALL THROUGH THE NIGHT. THIS IS AN EXTREMELY SERIOUS
  SITUATION!

  BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
  DANGERS OF FLOODING. IT IS VERY DIFFICULT AT NIGHT TO TELL HOW
  DEEP THE WATER MAY BE. MOTORISTS SHOULD NEVER DRIVE THROUGH WATER
  OF UNKNOWN DEPTH.

  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, 4:22 AM CDTSevere Thunderstorm WarningLSXFranklin, Washington38 min
May 7, 4:49 AM CDTFlash Flood WarningLSXJefferson4 hr
May 7, 6:32 AM CDTFlash Flood WarningLSXFranklin, Saint Charles, Saint Louis2 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.