Alert archive / Missouri / Flash Flood Warnings in 2008

Flash Flood Warning 35, NWS St. Louis, MO

May 30, 20086 counties in Missouri; Calhoun County, Jersey County, Madison County, Illinois

NWS St. Louis, MO issued this flash flood warning at May 30, 2008, 9:51 PM CDT for 6 counties in Missouri; Calhoun County, Jersey County, Madison County, Illinois. It was in force for 6 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: May 30, 2008, 9:51 PM CDT (02:51 UTC)
Expired: May 31, 2008, 3:45 AM CDT
In force: 6 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

Counties Calhoun County, IL, Jersey County, IL, Madison County, IL, City of Saint Louis, MO, Lincoln County, MO, Montgomery County, MO, Saint Charles County, MO, Saint Louis County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 8 km from the middle of the area, began a volume at 02:51 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 30, 9:55 PM CDT	FLASH FLOOD	2 S O'Fallon, MO	ONE INCH OF RAIN FELL IN 30 MINUTES...LOCAL STREET FLOODING IN LOW AREAS.
May 30, 10:53 PM CDT	FLASH FLOOD	1 Ne New Melle, MO	ONE FOOT OF WATER WAS OVER HOPEWELL ROAD NORTHEAST OF NEW MELLE. THE EAST BOUND LANE WAS BLOCKED.
May 30, 11:56 PM CDT	FLOOD	Bethalto, IL	THREE INCHES OF STANDING WATER OVER HIGHWAY 140 AT THE INTERSECTION WITH SOUTH PRARIE
May 31, 12:07 AM CDT	HEAVY RAIN 2.38	Ballwin, MO	MEASURED RAINFALL AMOUNT IS AS OF TIME OF REPORT
May 31, 12:20 AM CDT	HEAVY RAIN 2.3	Manchester, MO	AT MANCHESTER ROAD AND 141...RAINFALL REPORT AS OF TIME OF REPORT
May 31, 12:21 AM CDT	HEAVY RAIN 2.53	Wildwood, MO	AT HIGHWAY 100 AND HIGHWAY 109...RAINFALL MEASUREMENT IS AS OF TIME OF REPORT

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, 2.9 hours before the alert went out and 249 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: 1830 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 984 m above ground
0-6 km bulk shear: 0 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 0 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 310252
FFWLSX
ILC013-083-119-MOC113-139-183-189-219-510-310845-
/O.NEW.KLSX.FF.W.0035.080531T0251Z-080531T0845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
951 PM CDT FRI MAY 30 2008

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN LINCOLN COUNTY IN EAST CENTRAL MISSOURI
  MONTGOMERY COUNTY IN EAST CENTRAL MISSOURI
  ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI
  ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI
  ST. LOUIS CITY IN EAST CENTRAL MISSOURI
  WARREN COUNTY IN EAST CENTRAL MISSOURI
  SOUTHERN CALHOUN COUNTY IN SOUTHWEST ILLINOIS
  SOUTHWESTERN JERSEY COUNTY IN SOUTHWEST ILLINOIS
  MADISON COUNTY IN SOUTHWEST ILLINOIS

* UNTIL 345 AM CDT

* AT 947 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN OVER THE WARNED AREA. RADAR
  ESTIMATES 1 TO 2 INCHES OF RAIN HAS FALLEN SINCE 9 PM ON ALREADY
  SATURATED SOILS...DUE TO THE HEAVY RAINS EARLIER THIS WEEK.

* FLASH FLOODING CAN BE EXPECTED ACROSS THE AREA...AND WILL BE
  AFFECTING WORDEN...WOOD RIVER...ROXANA...PRAIRIETOWN...MARINE...
  LIVINGSTON...HARTFORD...GRAFTON...GODFREY...ELSAH...EDWARDSVILLE...
  DORSEY...CARPENTER...BETHALTO...ALTON...ALHAMBRA...WRIGHT CITY...
  WINFIELD...WEST ALTON...WENTZVILLE...WARRENTON...TRUESDALE...
  TROY...ST. PETERS...ST. PAUL...ST. CHARLES...SPANISH LAKE...PORTAGE
  DES SIOUX...ORCHARD FARMS...OFALLON...NEW FLORENCE...MOSCOW
  MILLS...MONTGOMERY CITY...MINEOLA...LAKE ST. LOUIS...JONESBURG...
  HAZELWOOD...HAWK POINT...FLORISSANT...BLACK JACK...BIG SPRING AND
  BELLFLOWER.

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.

LAT...LON 3867 9015 3846 9032 3852 9051 3846 9067
      3848 9073 3864 9073 3857 9084 3855 9094
      3862 9112 3862 9117 3872 9137 3868 9160
      3872 9164 3902 9164 3899 8964 3867 8963
TIME...MOT...LOC 0251Z 180DEG 0KT 3877 9097

$$

BYRD

2 follow-up statements

000 
WGUS73 KLSX 310701
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
154 AM CDT SAT MAY 31 2008

ILC013-083-119-MOC113-139-183-189-219-510-310845-
/O.CON.KLSX.FF.W.0035.000000T0000Z-080531T0845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MADISON IL-JERSEY IL-CALHOUN IL-ST. LOUIS CITY MO-ST. LOUIS MO-
ST. CHARLES MO-WARREN MO-MONTGOMERY MO-LINCOLN MO-
154 AM CDT SAT MAY 31 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 AM CDT FOR
SOUTHERN LINCOLN...MONTGOMERY...WARREN...ST. CHARLES...ST. LOUIS...
ST. LOUIS CITY...SOUTHERN CALHOUN...SOUTHERN JERSEY AND MADISON
COUNTIES...

AT 1252 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT THE THUNDERSTORMS HAVE MOVED OUT OF THE WARNING AREA. HOWEVER 
SEVERAL CREEKS IN THE AREA...INCLUDING DARDENNE CREEK IN ST. CHARLES 
COUNTY AND CREVE COEUR CREEK IN ST. LOUIS COUNTY...HAVE HAD VERY 
SUDDEN RISES AND WILL CAUSE SOME FLOODING. THESE CREEKS WILL LIKELY 
CREST SOON AND THEN FALL RAPIDLY. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WOOD 
RIVER...PRAIRIETOWN...GRAFTON...GODFREY...EDWARDSVILLE...
WRIGHT CITY...WINFIELD...WEST ALTON...WENTZVILLE...WARRENTON...
ST. PETERS...ST. CHARLES...NEW FLORENCE...MONTGOMERY CITY...
LAKE ST. LOUIS...JONESBURG...HAZELWOOD...HAWK POINT... 
FLORISSANT...BLACK JACK...BIG SPRING AND BELLFLOWER.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

LAT...LON 3867 9015 3846 9032 3852 9051 3846 9067
      3848 9073 3864 9073 3857 9084 3855 9094
      3862 9112 3862 9117 3872 9137 3868 9160
      3872 9164 3902 9164 3899 8964 3867 8963
TIME...MOT...LOC 0654Z 180DEG 0KT 3877 9097

$$

JPK

000 
WGUS73 KLSX 310849
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
348 AM CDT SAT MAY 31 2008

ILC013-083-119-MOC113-139-183-189-219-510-310858-
/O.EXP.KLSX.FF.W.0035.000000T0000Z-080531T0845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MADISON IL-JERSEY IL-CALHOUN IL-ST. LOUIS CITY MO-ST. LOUIS MO-
ST. CHARLES MO-WARREN MO-MONTGOMERY MO-LINCOLN MO-
348 AM CDT SAT MAY 31 2008

...THE FLASH FLOOD WARNING HAS EXPIRED FOR SOUTHERN LINCOLN...
MONTGOMERY...WARREN...ST. CHARLES...ST. LOUIS...ST. LOUIS CITY...
SOUTHERN CALHOUN...SOUTHERN JERSEY AND MADISON COUNTIES...

A CHECK WITH AREA LAW ENFORCEMENT INDICATES THAT FLOODING IS NO
LONGER A PROBLEM IN THE AREA.

MOTORISTS SHOULD USE CAUTION WHEN APPROACHING AREAS THAT EXPERIENCED
HIGH WATER LEVELS...AS THE FAST FLOWING WATER MAY HAVE DAMAGED 
ROADWAYS AND BRIDGES AND LEFT BEHIND DANGEROUS DEBRIS. 

LAT...LON 3867 9015 3846 9032 3852 9051 3846 9067
      3848 9073 3864 9073 3857 9084 3855 9094
      3862 9112 3862 9117 3872 9137 3868 9160
      3872 9164 3902 9164 3899 8964 3867 8963
TIME...MOT...LOC 0701Z 180DEG 0KT 3877 9097

$$

JPK

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 7:29 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Pike	31 min
May 30, 7:35 PM CDT	Areal Flood Advisory	LSX	Audrain, Boone, Monroe, Montgomery, Ralls	4 hr
May 30, 7:41 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Lincoln, Montgomery, Pike, Warren	49 min
May 30, 7:45 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway	45 min
May 30, 7:57 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln	48 min
May 30, 8:28 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Lincoln, Montgomery, Warren	47 min
May 30, 8:45 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln	45 min
May 30, 9:08 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Warren	52 min
May 30, 9:13 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Montgomery, Warren	32 min
May 30, 9:49 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Charles, Saint Louis, City of Saint Louis	41 min
May 30, 10:21 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	39 min
May 31, 8:40 AM CDT	River Flood Warning	LSX	Lincoln	22 hr
May 31, 5:14 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Moniteau	31 min
May 31, 5:34 PM CDT	Severe Thunderstorm Warning	LSX	Montgomery, Warren	41 min
May 31, 6:08 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Saint Louis	52 min
May 31, 6:40 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Saint Louis	50 min
May 31, 6:59 PM CDT	Areal Flood Advisory	LSX	Callaway, Montgomery, Warren	4 hr
May 30, 7:38 PM CDT	Tornado Warning	LSX	Montgomery	37 min
May 30, 8:25 PM CDT	Severe Thunderstorm Warning	LSX	Jersey, Macoupin, Madison	50 min
May 30, 9:11 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Macoupin, Madison, Montgomery	49 min
May 30, 9:19 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Madison	41 min
May 30, 9:58 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette, Madison	47 min
May 30, 10:56 PM CDT	Severe Thunderstorm Warning	LSX	Clinton, Saint Clair, Washington	49 min
May 30, 11:18 PM CDT	Flash Flood Warning	LSX	Clinton, Monroe, Saint Clair, Washington	6 hr
May 31, 6:01 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette, Macoupin, Madison, Montgomery	44 min
May 31, 6:03 PM CDT	Severe Thunderstorm Warning	LSX	Marion	27 min
May 31, 6:44 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette, Marion	40 min

Nearby

Flash Flood Warnings in Missouri, 2008 Flash Flood Warnings in Illinois, 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.