Alert archive / Missouri / Flash Flood Warnings in 2003

Flash Flood Warning 40, NWS St. Louis, MO

August 31, 20034 counties in Missouri

NWS St. Louis, MO issued this flash flood warning at Aug 31, 2003, 2:03 PM CDT for 4 counties in 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 outline as issued.

The facts

Issued
Aug 31, 2003, 2:03 PM CDT (19:03 UTC)
Expired
Aug 31, 2003, 8:00 PM CDT
In force
6 hr
Issued by
NWS St. Louis, MO
Area
Counties, with a storm outline in the text

Counties Lewis County, MO, Marion County, MO, Monroe County, MO, Shelby County, MO

The radar

The St Louis radar (KLSX), 163 km from the middle of the area, began a volume at 19:03 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

Davenport, (KDVN), launched 12:00Z, 7.1 hours before the alert went out and 225 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, Davenport, at 12:00Z on 2003-08-31Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 12:00Z on 2003-08-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -47 square meters per square second.193958Sfc1 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
1593 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
-47 m²/s²
0-3 km storm-relative helicity
-28 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 311918
FFWLSX
MOC111-127-137-205-010100-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
203 PM CDT SUN AUG 31 2003

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  LEWIS COUNTY IN NORTHEAST MISSOURI
  MARION COUNTY IN NORTHEAST MISSOURI
  MONROE COUNTY IN NORTHEAST MISSOURI
  SHELBY COUNTY IN NORTHEAST MISSOURI

* UNTIL 800 PM CDT

* AT 200 PM CDT...STEADY RAINS HAVE FALLEN THROUGH THE MORNING 
ACROSS THE AREA.  DOPPLER PRECIPITATION ESTIMATES INDICATE 2 TO 3 
INCHES OF RAIN HAS FALLEN SINCE 700 AM THIS MORNING.  IN ADDITION
TO THAT OVERNIGHT RAINS REACHED AN INCH OR TWO IN SOME AREAS.

THE HEAT OF THE AFTERNOON HAS NOW CAUSED SCATTERED THUNDERSTORMS
TO DEVELOP UPSTREAM FROM THE WARNED AREA.  THIS WILL MAKE ADDITIONAL
RAINFALL MORE VARIABLE...HOWEVER SOME AREAS SOULD RECEIVE ANOTHER 
TWO TO FOUR INCHES OF RAINFALL THIS AFTERNOON AND TONIGHT.  THIS
WILL BRING RAINFALL TOTALS IN THAT AREA TO LOCALLY 6 TO 8 INCHES AND 
POSSIBLY HIGHER.  

ANTECEDENT WEATHER CONDITIONS HAVE BEEN DRY...HOWEVER THE COPIOUS
RAINFALL TOTALS FROM THIS STORM WILL CREATE MAJOR RUNOFF AND 
SIGNIFICANT FLOODING THIS AFTERNOON AND EVENING. 
 
ALL RIVERS...STREAMS...AND TRIBUTARIES...INCLUDING THE SALT RIVER AND
ITS TRIBUTARIES...LONG BRANCH...OTTER CREEK...NORTH RIVER...AND THE 
NORTH...MIDDLE...AND SOUTH FABIUS RIVERS...WILL SEE MAJOR RISES.

CAMPERS AND OTHER OUTDOOR HOLIDAY INTERESTS SHOULD TAKE SPECIAL
PRECAUTIONS FOR SAFETY.  LAW ENFORCEMENT PERSONNEL SHOULD KEEP 
PEOPLE IN FLOOD PRONE AREAS ADVISED.
 
A LOT OF THIS RUNOFF WILL COME ABOUT AFTER IT IS DARK 
TONIGHT...THATS WHEN MOST FATALITIES OCCUR.  BE CAREFUL

IF FLASH FLOODING IS OBSERVED OR IMMINENT...MOVE QUICKLY TO HIGHER 
GROUND. NEVER DRIVE INTO AN AREA WHERE WATER COVERS THE ROAD.

LAT...LON 4025 9151 3971 9139 3966 9177 3938 9176
          3937 9231 3986 9231 3998 9198 4030 9194

$$
PEDIGO
1 follow-up statement
000 
WGUS73 KLSX 312250
FFSLSX
MOC111-127-137-205-010045-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
545 PM CDT SUN AUG 31 2003

...FLASH FLOOD WARNING FOR MONROE...MARION...SHELBY AND LEWIS 
COUNTIES IN NORTHEAST MISSOURI HAS BEEN CANCELLED...

WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE SHOWERS AND 
THUNDERSTORMS CONTAINING HEAVY RAINFALL WHICH PROMPTED THE FLASH 
FLOOD WARNING HAVE MOVED OUT OF THE AREA...ALTHOUGH LIGHT RAINFALL 
WILL CONTINUE FOR THE NEXT FEW HOURS.  SO FAR THERE HAVE BEEN NO 
REPORTS OF FLOODING IN THIS AREA.

A FLASH FLOOD WATCH REMAINS IN EFFECT FOR THE AREA THROUGH LABOR 
DAY.  ANY ADDITIONAL HEAVY RAIN WHICH AFFECTS THE AREA WILL FALL ON 
SATURATED GROUND AND MAY PRODUCE FLOODING OF LOW LYING AND FLOOD 
PRONE AREAS.

$$
GKS

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.