Alert archive / Missouri / Flash Flood Warnings in 2003

Flash Flood Warning 21, NWS St. Louis, MO

June 25, 2003Saint Charles County, Saint Louis County, City of Saint Louis, Missouri

NWS St. Louis, MO issued this flash flood warning at Jun 25, 2003, 10:25 PM CDT for Saint Charles County, Saint Louis County, City of Saint Louis, Missouri. It was in force for 6 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
Jun 25, 2003, 10:25 PM CDT (03:25 UTC)
Expired
Jun 26, 2003, 4:30 AM CDT
In force
6 hr
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties City of Saint Louis, MO, Saint Charles County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 21 km from the middle of the area, began a volume at 03:25 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, 3.4 hours before the alert went out and 227 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 2003-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 843 joules per kilogram.LCLEL10008507005003002001001 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 2003-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 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
843 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
1649 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
135 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KLSX 260328
FFWLSX
MOC183-189-510-260930-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1025 PM CDT WED JUN 25 2003

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

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

* UNTIL 430 AM CDT

* AT 1025 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED           
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN ACROSS THE ST. LOUIS       
  METROPOLITAN AREA. RADAR ESTIMATES THAT OVER 2 INCHES OF RAINFALL  
  HAS ALREADY OCCURRED...AND ADDITIONAL RAINFALL FROM THESE          
  THUNDERSTORMS WILL LIKELY CAUSE FLASH FLOODING.  

MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES DO NOT ATTEMPT TO
CROSS BRIDGES...DIPS...OR LOW WATER CROSSINGS IF WATER COVERS THE
ROADWAY. DO NOT DRIVE AROUND BARRICADES IF YOUR VEHICLE STALLS...
ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. ACT QUICKLY IF FLASH FLOODING IS OBSERVED. MOVE
TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT
TO FLOODING WHEN WATER BEGINS RISING.
$$

CVKING
1 follow-up statement
000 
WGUS73 KLSX 260624
FFSLSX
MOC183-189-510-260930-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
125 AM CDT THU JUN 26 2003

...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR ST. LOUIS CITY...ST.
LOUIS AND ST. CHARLES COUNTIES UNTIL 430 AM CDT...

ALTHOUGH RAINFALL ON THE MISSOURI SIDE OF THE ST LOUIS METRO AREA 
HAS BEGUN TO TAPER OFF...FLOODING PROBLEMS CONTINUE IN SEVERAL 
AREAS.  IN ST LOUIS COUNTY...EASTBOUND AND WESTBOUND HIGHWAY 40 IS 
FLOODED WEST OF HAMPTON AVENUE...AND FLOODING HAS ALSO BEEN REPORTED 
ON AT LEAST ONE SECTION OF INTERSTATE 70.  

IN ST CHARLES COUNTY...FLOODING HAS CLOSED OFALLON ROAD NEAR 
GUTERMUTH.  WATER IS ALSO STANDING ON HIGHWAY 40...BETWEEN HIGHWAY 
94 AND HIGHWAY K...AND MEXICO ROAD ALSO HAS STANDING WATER...EAST OF 
HIGHWAY K.

EARLY MORNING MOTORISTS SHOULD REMAIN ALERT...BECAUSE IT IS HARDER 
TO RECOGNIZE THE DANGERS OF FLOODING AT NIGHT.  IN ADDITION TO THOSE 
LOCATIONS THAT NORMALLY FLOOD DURING TIMES OF HEAVY RAIN...BE 
ESPECIALLY CAREFUL WHEN DRIVING INTO CONSTRUCTION AREAS.  ROAD WORK 
OFTEN DISRUPTS DRAINAGE...WHICH CAUSING FLOODING PROBLEMS DURING 
HEAVY RAIN.

NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE 
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS 
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. 
MOVE TO HIGHER GROUND.

$$
TRUETT

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 25, 8:18 PM CDTFlash Flood WarningLSXAudrain, Pike, Ralls6 hr
Jun 25, 8:35 PM CDTFlash Flood WarningLSXLincoln6 hr
Jun 25, 9:18 PM CDTFlash Flood WarningLSXBoone6 hr
Jun 25, 10:04 PM CDTFlash Flood WarningLSXCallaway, Montgomery6 hr
Jun 25, 11:05 PM CDTFlash Flood WarningLSXFranklin, Gasconade, Warren6 hr
Jun 26, 1:13 AM CDTFlash Flood WarningLSXJefferson6 hr
Jun 26, 2:14 AM CDTFlash Flood WarningLSXPike4 hr
Jun 26, 2:29 AM CDTFlash Flood WarningLSXLincoln4 hr
Jun 26, 4:14 AM CDTFlash Flood WarningLSXSaint Charles, Saint Louis, City of Saint Louis3 hr

Nearby

Flash Flood Warnings in Missouri, 2003Every flash flood warning in 2003

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.