Alert archive / Missouri / Flash Flood Warnings in 2004

Flash Flood Warning 29, NWS St. Louis, MO

August 27, 2004Adams County, Brown County, Pike County, Illinois; 7 counties in Missouri

NWS St. Louis, MO issued this flash flood warning at Aug 27, 2004, 8:46 AM CDT for Adams County, Brown County, Pike County, Illinois; 7 counties in Missouri. It was in force for 4 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 27, 2004, 8:46 AM CDT (13:46 UTC)
Expired
Aug 27, 2004, 12:45 PM CDT
In force
4 hr
Issued by
NWS St. Louis, MO
Area
Counties, with a storm outline in the text

Counties Adams County, IL, Brown County, IL, Pike County, IL, Knox County, MO, Lewis County, MO, Marion County, MO, Monroe County, MO, Pike County, MO, Ralls County, MO, Shelby County, MO

The radar

The St Louis radar (KLSX), 117 km from the middle of the area, began a volume at 13:46 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, 1.8 hours before the alert went out and 226 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 2004-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 27 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, Davenport, at 12:00Z on 2004-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 97 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
27 J/kg
Mixed-layer CIN
-358 J/kg
Mixed-layer LCL
1278 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
97 m²/s²
0-3 km storm-relative helicity
114 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 271349
FFWLSX
ILC001-009-149-MOC103-111-127-137-163-173-205-271745-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
846 AM CDT FRI AUG 27 2004

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  KNOX COUNTY IN NORTHEAST MISSOURI
  LEWIS COUNTY IN NORTHEAST MISSOURI
  MARION COUNTY IN NORTHEAST MISSOURI
  MONROE COUNTY IN NORTHEAST MISSOURI
  PIKE COUNTY IN NORTHEAST MISSOURI
  RALLS COUNTY IN NORTHEAST MISSOURI
  SHELBY COUNTY IN NORTHEAST MISSOURI
  ADAMS COUNTY IN WEST CENTRAL ILLINOIS
  BROWN COUNTY IN WEST CENTRAL ILLINOIS
  PIKE COUNTY IN WEST CENTRAL ILLINOIS

* UNTIL 1245 PM CDT

* THUNDERSTORMS HAVE PRODUCED BETWEEN 1 AND 3 INCHES OF RAIN ACROSS 
  THE AREA THIS MORNING.  ADDITIONAL THUNDERSTORMS HAVE NOW BEGUN TO
  DEVELOP FROM WEST OF MARK TWAIN LAKE TO JUST SOUTH OF EDINA...AND
  THESE STORMS WILL BRING ADDITIONAL DOWNPOURS TO THE AREAS ALREADY
  HIT BY HEAVY RAIN THIS MORNING.

* FLASH FLOODING CAN BE EXPECTED ACROSS THE AREA...AND WILL BE
  AFFECTING SHELBINA...QUINCY...PARIS...HANNIBAL...BOWLING GREEN...
  PITTFIELD...AND THE MARK TWAIN LAKE RECREATIONAL AREA.

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.

DURING HEAVY RAINS...KEEP CHILDREN AWAY FROM CREEKS AND STORM DRAINS.
GENTLY FLOWING WATER CAN TURN INTO A RAGING TORRENT IN A MATTER OF
MINUTES.

THOSE CAMPING NEAR SMALL STREAMS SHOULD MOVE TO HIGHER GROUND AT
ONCE. WATER LEVELS MAY RISE RAPIDLY WITH LITTLE OR NO WARNING...EVEN
IF THE HEAVY RAINS ARE WELL UPSTREAM OF YOUR CAMPSITE.

LAT...LON 4020 9094 3999 9055 3940 9061 3940 9093
      3926 9079 3916 9140 3934 9147 3936 9228
      4032 9234

$$

TRUETT
2 follow-up statements
000 
WGUS73 KLSX 271608
FFSLSX
ILC001-009-149-MOC103-111-127-137-163-173-205-271745-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1107 AM CDT FRI AUG 27 2004

...THE FLASH FLOOD WARNING CONTINUES FOR PIKE...BROWN...AND ADAMS 
COUNTIES IN ILLINOIS...AND MONROE...RALLS...MARION...SHELBY...LEWIS 
AND KNOX COUNTIES IN MISSOURI...UNTIL 1245 PM CDT...

AT 11 AM CDT...WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE 
THUNDERSTORMS PRODUCING VERY HEAVY RAIN OVER NORTHEAST MISSOURI AND 
WEST CENTRAL ILLINOIS.  THE HEAVY RAIN WAS CONCENTRATED IN A 20 MILE 
WIDE BAND THAT EXTENDED FROM JUST NORTHWEST OF PARIS...THROUGH 
MONROE CITY AND HANNIBAL...TO NEAR MOUNT STERLING.

THE TORRENTIAL RAINS OF THIS MORNING HAS FLOODED MANY ROADS AND 
DITCHES.  LAW ENFORCMENT REPORTS IN KNOX COUNTY...ROUTE E SOUTH OF 
KNOX CITY...AND HIGHWAY 151 SOUTH OF NOVELTY...ARE BOTH CLOSED.  IN 
QUINCY...AND IN THE KINDERHOOK AREA OF PIKE COUNTY ILLINOIS...SOME 
FLOODING HAS ALSO BEEN REPORTED.

HEAVY RAINS WILL CONTINUE THROUGH MIDDAY.  THE AREA OF MOST CONCERN 
WILL BE FROM NEAR PARIS...THROUGH THE MARK TWAIN LAKE AND QUINCY 
AREAS...TO NEAR MOUNT STERLING.  IN THIS NARROW AREA...ADDITIONAL 
RAINS OF ONE...TO POSSIBLY 2 INCHES...MAY OCCUR. 

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER
LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING.

MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. AVOID BRIDGES...DIPS...
OR OTHER LOW LYING AREAS...AND 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.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT. IT IS
IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR
CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS SHOULD AVOID
CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS.

$$

TRUETT
000 
WGUS73 KLSX 271748
FFSLSX
ILC001-009-149-MOC103-111-127-137-163-173-205-271800-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1245 PM CDT FRI AUG 27 2004

...FLASH FLOOD WARNING FOR PIKE...BROWN...AND ADAMS COUNTIES IN 
ILLINOIS...AND MONROE...RALLS...MARION...SHELBY...LEWIS AND KNOX 
COUNTIES IN MISSOURI...HAS EXPIRED...

RAINFALL OVER NORTHEAST MISSOURI AND WEST CENTRAL ILLINOIS HAS 
DIMINISHED CONSIDERABLY SINCE 11 AM...WHICH HAS ALLEVIATED  
THE FLASH FLOOD THREAT FOR THE TIME BEING.  

HOWEVER...ADDITIONAL THUNDERSTORMS WITH HEAVY RAIN ARE STILL 
EXPECTED THIS AFTERNOON AND TONIGHT.  THIS RAIN...COMBINED WITH THE 
WET GROUND...MAKES ADDITIONAL FLASH FLOODING A VERY REAL POSSIBILITY.
A FLASH FLOOD WATCH REMAINS IN EFFECT FOR THE AREA...AND THOSE 
LIVING IN FLOOD PRONE OR LOW LYING AREAS SHOULD CAREFULLY MONITOR 
WEATHER DEVELOPMENTS DURING THE AFTERNOON...AND OVERNIGHT TONIGHT.

$$

TRUETT

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 27, 2:09 PM CDTSevere Thunderstorm WarningLSXCallaway, Montgomery51 min
Aug 27, 2:16 PM CDTTornado WarningLSXCallaway, Montgomery44 min
Aug 27, 2:46 PM CDTTornado WarningLSXWarren44 min
Aug 27, 2:50 PM CDTSevere Thunderstorm WarningLSXOsage25 min
Aug 27, 3:10 PM CDTSevere Thunderstorm WarningLSXFranklin, Gasconade, Osage50 min
Aug 27, 3:30 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Warren45 min
Aug 27, 3:44 PM CDTSevere Thunderstorm WarningLSXFranklin31 min
Aug 27, 4:11 PM CDTSevere Thunderstorm WarningLSXFranklin, Jefferson, Saint Charles, Saint Louis49 min
Aug 27, 5:28 PM CDTSevere Thunderstorm WarningLSXMadison47 min

Nearby

Flash Flood Warnings in Missouri, 2004Flash Flood Warnings in Illinois, 2004Every flash flood warning in 2004

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.