Alert archive / Illinois / Flash Flood Warnings in 2004

Flash Flood Warning 17, NWS St. Louis, MO

May 27, 2004Clinton County, Marion County, Saint Clair County, Illinois

NWS St. Louis, MO issued this flash flood warning at May 27, 2004, 8:10 PM CDT for Clinton County, Marion County, Saint Clair County, Illinois. It was in force for 16 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 27, 2004, 8:10 PM CDT (01:10 UTC)
Expired: May 28, 2004, 11:45 AM CDT
In force: 16 hr
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

Counties Clinton County, IL, Marion County, IL, Saint Clair County, IL

The radar

The St Louis radar (KLSX), 103 km from the middle of the area, began a volume at 01:11 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.

What was reported inside it

Time	Report	Where	Remark
May 27, 8:15 PM CDT	FLOOD	Fairview Heights, IL	INTERSECTION OF HIGHWAY 50 AND 159 - INTERSECTION IMPASSIBLE DUE TO HIGH WATER.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.2 hours before the alert went out and 195 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 651 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 1078 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: -105 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: -0.4
Supercell composite: -3.6

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KLSX 280118
FFWLSX
ILC027-121-163-280445-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
810 PM CDT THU MAY 27 2004

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CLINTON COUNTY IN SOUTH CENTRAL ILLINOIS
  MARION COUNTY IN SOUTH CENTRAL ILLINOIS
  ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS

* UNTIL 1145 AM CDT

* AT 810 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN IN AND AROUND BELLEVILLE...
  OFALLON...FREEBURG...NEW BADEN...NEW MEMPHIS...
  GERMANTOWN...CENTRALIA AND CARTTER.  1.5 INCHES OF RAIN WAS 
  REPORTED TO HAVE FALLEN THE PAST 45 MINUTES.

* FLASH FLOODING CAN BE EXPECTED ACROSS THE AREA...AND WILL BE  
  AFFECTING ROADS AND STREAMS INCLUDING SILVER...BEAVER AND CROOKED
  CREEKS.

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

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.

LAT...LON 3849 8910 3852 8930 3845 8962 3823 8976
          3824 8993 3834 8988 3838 9007 3853 9027
          3867 9023 3865 8960 3873 8959 3874 8914
          3882 8913 3883 8873 3856 8873

$$

DUMMER

1 follow-up statement

000 
WGUS73 KLSX 280417
FFSLSX
ILC027-121-133-163-MOC099-280445-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1106 PM CDT THU MAY 27 2004

...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR MONROE...ST. CLAIR...
CLINTON...MARION AND JEFFERSON COUNTIES UNTIL 1145 PM CDT...

A CHECK WITH LAW ENFORCEMENT OFFICIALS IN MONROE...ST. 
CLAIR...CLINTON...MARION...AND JEFFERSON COUNTIES INDICATED THAT 
NUMEROUS ROADS THROUGHOUT THE AREA HAD STANDING WATER...BUT NO ROADS 
WERE CLOSED AND NO SERIOUS FLOODING WAS REPORTED.

WATER LEVELS WILL CONTINUE TO RECEDE RAPIDLY OVER THE NEXT HOUR OR 
SO.  HOWEVER...MOTORISTS SHOULD CONTINUE TO EXERCISE CAUTION...AS
DARKNESS OFTEN OBSCURES THE DANGERS OF HIGH WATER. AVOID 
BRIDGES...DIPS...OR OTHER LOW LYING AREAS...AND NEVER DRIVE YOUR 
VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. 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.

Issued	Product	Office	Counties	Lasted
May 27, 7:31 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Saint Clair	44 min
May 27, 7:38 PM CDT	Severe Thunderstorm Warning	LSX	Clinton, Washington	52 min
May 27, 7:40 PM CDT	Flash Flood Warning	LSX	Monroe	4 hr
May 27, 7:45 PM CDT	Severe Thunderstorm Warning	LSX	Marion	30 min
May 27, 8:02 PM CDT	Tornado Warning	LSX	Monroe	43 min
May 27, 8:10 PM CDT	Severe Thunderstorm Warning	LSX	Saint Clair	35 min
May 27, 8:19 PM CDT	Severe Thunderstorm Warning	LSX	Washington	41 min
May 27, 8:23 PM CDT	Severe Thunderstorm Warning	LSX	Randolph	52 min

Nearby

Flash Flood Warnings in Illinois, 2004 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.