Alert archive / Illinois / Flash Flood Warnings in 2004

Flash Flood Warning 28, NWS St. Louis, MO

August 26, 2004Fayette County, Marion County, Illinois

NWS St. Louis, MO issued this flash flood warning at Aug 26, 2004, 3:42 AM CDT for Fayette County, Marion County, Illinois. 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 26, 2004, 3:42 AM CDT (08:42 UTC)
Expired
Aug 26, 2004, 8:00 AM CDT
In force
4 hr
Issued by
NWS St. Louis, MO
Area
Counties, with a storm outline in the text

Counties Fayette County, IL, Marion County, IL

The radar

The Evansville,IN radar (KVWX), 127 km from the middle of the area, began a volume at 08:47 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 00:00Z, 8.7 hours before the alert went out and 332 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 00:00Z on 2004-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1111 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 00:00Z on 2004-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 169 square meters per square second.1939587897117Sfc1 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
1111 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
904 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
169 m²/s²
0-3 km storm-relative helicity
282 m²/s²
Significant tornado parameter
0.7
Supercell composite
7.0

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KLSX 260851
FFWLSX
ILC051-121-261300-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
342 AM CDT THU AUG 26 2004

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  FAYETTE COUNTY IN SOUTH CENTRAL ILLINOIS
  MARION COUNTY IN SOUTH CENTRAL ILLINOIS

* UNTIL 800 AM CDT

* AT 342 AM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED NUMEROUS
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN BETWEEN WRIGHTS CORNER AND
  SALEM ILLINOIS.  RADAR WAS ESTIMATING THAT BETWEEN 3 AND 4 INCHES
  OF RAIN HAVE FALLEN IN THE LAST THREE HOURS FROM NEAR RAMSEY
  SOUTHEAST TO NEAR HELM ILLINOIS.  EARLIER LAW ENFORCEMENT REPORTED
  FLOODING IN LOW LYING AREAS NEAR SALEM ILLINOIS AND ALSO JUST EAST
  OF CENTRALIA ILLINOIS.

* FLASH FLOODING CAN BE EXPECTED AS THUNDERSTORMS REPEATEDLY DUMP
  HEAVY RAINS OVER THIS AREA DURING THE NEXT COUPLE OF HOURS WITH
  ADDITIONAL RAIN AMOUNTS OF BETWEEN 1 AND 3 INCHES LIKELY.

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

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.

LAT...LON 3920 8883 3893 8882 3881 8872 3849 8871
      3852 8911 3871 8913 3885 8921 3920 8920

$$
GKS
2 follow-up statements
000 
WGUS73 KLSX 261200
FFSLSX
ILC051-121-261300-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
649 AM CDT THU AUG 26 2004

...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR MARION AND FAYETTE
COUNTIES UNTIL 800 AM CDT...

AT 649 AM CDT...LAW ENFORCEMENT REPORTED SOME MINOR FLOODING OF A 
FEW ROADS IN MARION AND FAYETTE COUNTIES. WATER WAS COVERING THE 
ROAD ON HIGHWAY 37 SOUTH OF LA CLEDE...WHILE A NUMBER OF RURAL ROADS 
SOUTH OF SALEM HAD ANYWHERE FROM 2 TO 6 INCHES OF WATER COVERING 
THEM. THEY ALSO REPORTED MOST OF THE WATER WAS BEGINNING TO RECEDE. 

SOME SPOTTY SHOWERS AND THUNDERSTORMS WILL REMAIN POSSIBLE THROUGH 
THE EARLY MORNING HOURS...HOWEVER THE BULK OF HEAVY FLOOD PRODUCING 
RAINFALL HAS ENDED...AND WATER SHOULD CONTINUE TO RECEDE. MOTORISTS 
SHOULD USE CAUTION THIS MORNING AND BE PREPARED FOR SOME STANDING 
WATER.

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.

$$

FG
000 
WGUS73 KLSX 261300
FFSLSX
ILC051-121-261330-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
800 AM CDT THU AUG 26 2004

...FLASH FLOOD WARNING FOR MARION AND FAYETTE COUNTIES HAS EXPIRED...

RECENT REPORTS FROM LAW ENFORCEMENT OFFICIALS INDICATED THAT THE 
HIGH WATER HAS RECEDED AND FLOODING WAS NO LONGER OCCURING. ONLY 
SOME MINOR STANDING WATER UP TO A FEW INCHES DEEP REMAINDED IN 
ISOLATED SPOTS ON A SOME RURAL ROADS IN SOUTHEAST MARION COUNTY. 
THEREFORE THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE.  

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 26, 4:27 PM CDTSevere Thunderstorm WarningLSXCalhoun, Jersey48 min
Aug 26, 5:18 PM CDTSevere Thunderstorm WarningLSXGreene27 min

Nearby

Flash 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.