Alert archive / Illinois / Flash Flood Warnings in 2008

Flash Flood Warning 52, NWS St. Louis, MO

June 6, 2008Monroe County, Saint Clair County, Illinois; Jefferson County, Saint Louis County, Missouri

NWS St. Louis, MO issued this flash flood warning at Jun 6, 2008, 3:52 PM CDT for Monroe County, Saint Clair County, Illinois; Jefferson County, Saint Louis County, Missouri. It was in force for 4 hr. 6 reports 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: Jun 6, 2008, 3:52 PM CDT (20:52 UTC)
Expired: Jun 6, 2008, 7:45 PM CDT
In force: 4 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

Counties Monroe County, IL, Saint Clair County, IL, Jefferson County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 50 km from the middle of the area, began a volume at 20:55 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
Jun 6, 4:39 PM CDT	HEAVY RAIN 1	Millstadt, IL	AFTERNOON STORM TOTAL.
Jun 6, 5:06 PM CDT	HEAVY RAIN 1	1 E O'Fallon, IL
Jun 6, 5:40 PM CDT	HEAVY RAIN 2.1	O'Fallon, IL
Jun 6, 5:48 PM CDT	HEAVY RAIN 1.2	Freeburg, IL
Jun 6, 6:25 PM CDT	HEAVY RAIN 1.3	1 N Mascoutah, IL
Jun 6, 7:53 PM CDT	HEAVY RAIN 2.2	2 E O'Fallon, IL	STORM TOTAL

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 12:00Z, 8.9 hours before the alert went out and 254 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: 751 J/kg
Mixed-layer CIN: -88 J/kg
Mixed-layer LCL: 991 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 387 m²/s²
0-3 km storm-relative helicity: 407 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KLSX 062052
FFWLSX
ILC133-163-MOC099-189-070045-
/O.NEW.KLSX.FF.W.0052.080606T2052Z-080607T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
352 PM CDT FRI JUN 6 2008

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL JEFFERSON COUNTY IN EAST CENTRAL MISSOURI
  SOUTHEASTERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI
  NORTHERN MONROE COUNTY IN SOUTHWEST ILLINOIS
  ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS

* UNTIL 745 PM CDT

* AT 346 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  SEVERE THUNDERSTORMS PRODUCING TORRENTIAL RAINFALL MOVING ACROSS   
  THE WARNED AREA. FLASH FLOODING IS EXPECTED OVER THE WARNED AREA.

* FLASH FLOODING CAN BE EXPECTED ACROSS THE AREA...AND WILL BE
  AFFECTING FOUNTAIN...SWANSEA...SMITHTON...SHILOH...SCOTT AFB...
  OFALLON...MILLSTADT...MASCOUTAH...LEBANON...FREEBURG...DUPO...
  COLUMBIA...BELLEVILLE...OAKVILLE...ARNOLD AND ANTONIA.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 
CREEKS AND STREAMS...ROADS...AS WELL AS FARMLAND ALONG THE BANKS OF 
CREEKS AND STREAMS.

LAT...LON 3811 9067 3820 9078 3822 9078 3851 9027
      3865 8971 3847 8972
TIME...MOT...LOC 2052Z 180DEG 0KT 3836 9040

$$

CVKING

2 follow-up statements

000 
WGUS73 KLSX 062230
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
530 PM CDT FRI JUN 6 2008

ILC133-163-MOC099-189-070045-
/O.CON.KLSX.FF.W.0052.000000T0000Z-080607T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONROE IL-ST. CLAIR IL-JEFFERSON MO-ST. LOUIS MO-
530 PM CDT FRI JUN 6 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR 
SOUTHEASTERN ST. LOUIS...JEFFERSON...ST. CLAIR AND NORTHERN MONROE 
COUNTIES...

AT 524 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE SCATTERED STRONG THUNDERSTORMS PRODUCING LOCALLY HEAVY 
RAINFALL ACROSS THE WARNED AREA. FLASH FLOODING OF LOW LYING AREAS 
IS LIKELY OVER THE WARNED AREA.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ANTONIA...
SWANSEA...SMITHTON...SHILOH...SCOTT AFB...OFALLON...MILLSTADT...
MASCOUTAH...LEBANON...FREEBURG...DUPO...COLUMBIA...BELLEVILLE...
OAKVILLE AND ARNOLD.

RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE 
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS 
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY 
AUTOMOBILE.

LAT...LON 3811 9067 3820 9078 3822 9078 3851 9027
      3865 8971 3847 8972
TIME...MOT...LOC 2230Z 180DEG 0KT 3836 9040

$$

CVKING

000 
WGUS73 KLSX 070000
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
700 PM CDT FRI JUN 6 2008

ILC133-163-MOC099-189-070045-
/O.CON.KLSX.FF.W.0052.000000T0000Z-080607T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONROE IL-ST. CLAIR IL-JEFFERSON MO-ST. LOUIS MO-
700 PM CDT FRI JUN 6 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR 
SOUTHERN ST. LOUIS...JEFFERSON...ST. CLAIR AND NORTHERN MONROE 
COUNTIES...

AT 657 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
ANOTHER SEVERE THUNDERSTORM PRODUCING TORRENTIAL RAINFALL HEADED FOR 
THE WARNED AREA. THIS WILL CAUSE ADDITIONAL FLASH FLOODING ACROSS 
THE WARNED AREA. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SWANSEA...
SMITHTON...SHILOH...SCOTT AFB...OFALLON...MILLSTADT...MASCOUTAH...
LEBANON...FREEBURG...DUPO...COLUMBIA...BELLEVILLE...OAKVILLE...ARNOLD
AND ANTONIA.

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...
DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM...
EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER
GROUND.

LAT...LON 3811 9067 3820 9078 3822 9078 3851 9027
      3865 8971 3847 8972
TIME...MOT...LOC 0000Z 180DEG 0KT 3836 9040

$$

CVKING

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 6, 2:52 AM CDT	Severe Thunderstorm Warning	LSX	Adams	38 min
Jun 6, 2:21 PM CDT	Tornado Warning	LSX	Monroe, Saint Clair	39 min
Jun 6, 2:54 PM CDT	Tornado Warning	LSX	Clinton, Madison, Saint Clair	51 min
Jun 6, 2:58 PM CDT	Flash Flood Warning	LSX	Madison, Saint Clair	4 hr
Jun 6, 3:12 PM CDT	Tornado Warning	LSX	Monroe	48 min
Jun 6, 3:32 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Fayette, Madison, Montgomery	43 min
Jun 6, 3:38 PM CDT	Flash Flood Warning	LSX	Bond, Clinton, Fayette, Madison, Montgomery	7 hr
Jun 6, 3:43 PM CDT	Tornado Warning	LSX	Clinton, Madison, Saint Clair	47 min
Jun 6, 4:18 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette, Marion	42 min
Jun 6, 4:22 PM CDT	Tornado Warning	LSX	Bond, Clinton	23 min
Jun 6, 4:41 PM CDT	Tornado Warning	LSX	Bond, Clinton, Fayette, Marion	40 min
Jun 6, 4:44 PM CDT	Flash Flood Warning	LSX	Bond, Clinton, Fayette, Marion	6 hr
Jun 6, 6:27 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton	30 min
Jun 6, 4:46 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Montgomery, Osage	23 min
Jun 6, 10:31 AM CDT	River Flood Warning	LSX	Franklin, Warren	18 days
Jun 6, 10:31 AM CDT	River Flood Warning	LSX	Saint Charles, Saint Louis	31 days
Jun 6, 1:15 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Jefferson, Washington	45 min
Jun 6, 1:47 PM CDT	Tornado Warning	LSX	Franklin, Jefferson, Washington	43 min
Jun 6, 1:51 PM CDT	Tornado Warning	LSX	Crawford	54 min
Jun 6, 1:57 PM CDT	Flash Flood Warning	LSX	Crawford, Franklin, Washington	8 hr
Jun 6, 2:30 PM CDT	Tornado Warning	LSX	Crawford, Franklin, Jefferson, Washington	45 min
Jun 6, 2:37 PM CDT	Flash Flood Warning	LSX	Franklin, Jefferson, Saint Louis, City of Saint Louis	4 hr
Jun 6, 2:41 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade	24 min
Jun 6, 5:57 PM CDT	Tornado Warning	LSX	Crawford, Washington	48 min
Jun 6, 6:36 PM CDT	Tornado Warning	LSX	Washington	39 min

Nearby

Flash Flood Warnings in Illinois, 2008 Flash Flood Warnings in Missouri, 2008 Every flash flood warning in 2008

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.