Alert archive / Missouri / Flash Flood Warnings in 2011
Flash Flood Warning 1, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Mar 4, 2011, 6:20 PM CST for 5 counties in Missouri; Madison County, Saint Clair County, Illinois. It was in force for 5 hr. 4 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
- Mar 4, 2011, 6:20 PM CST (00:20 UTC)
- Expired
- Mar 4, 2011, 11:23 PM CST
- In force
- 5 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Madison County, IL, Saint Clair County, IL, City of Saint Louis, MO, Franklin County, MO, Saint Charles County, MO, Saint Louis County, MO, Warren County, MO
The radar
The St Louis radar (KLSX), 21 km from the middle of the area, began a volume at 00:23 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 |
|---|---|---|---|
| Mar 4, 6:55 PM CST | FLASH FLOOD | Harvester, MO | FOUR TO SIX INCHES OF WATER OVER HWY 364 SERVICE ROAD EASTBOUND AT WOODSTONE DRIVE. |
| Mar 4, 7:10 PM CST | FLASH FLOOD | 3 W Florissant, MO | 1.00 INCH OF RAIN FELL IN LAST HOUR. WATER FLOWING DOWN ENTIRE STREET...UNKNOWN DEPTH. |
| Mar 4, 7:10 PM CST | HEAVY RAIN 1 | 3 W Florissant, MO | 1.00 INCH OF RAIN FELL IN LAST HOUR. WATER FLOWING DOWN ENTIRE STREET...UNKNOWN DEPTH. |
| Mar 4, 9:10 PM CST | FLASH FLOOD | St. Peters, MO | DARDENNE CREEK AT ST. PETERS EXCEEDED FLOOD STAGE...16.0 FEET. |
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, 0.3 hours before the alert went out and 220 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.
- Mixed-layer CAPE
- 137 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 583 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
398
WGUS53 KLSX 050020
FFWLSX
ILC119-163-MOC071-183-189-219-510-050600-
/O.NEW.KLSX.FF.W.0001.110305T0020Z-110305T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
620 PM CST FRI MAR 4 2011
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHEASTERN FRANKLIN COUNTY IN EAST CENTRAL MISSOURI...
NORTHWESTERN ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS...
SOUTHEASTERN WARREN 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...
WESTERN MADISON COUNTY IN SOUTHWEST ILLINOIS...
* UNTIL MIDNIGHT CST
* AT 614 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WERE BEGINNING TO MOVE OVER THE SAME AREA
THAT RECEIVED AN INCH OR MORE OF RAINFALL FROM THUNDERSTORMS
DURING THE PREVIOUS HOUR. THIS AREA EXTENDED FROM SOUTHEAST
WARREN COUNTY THROUGH ST. CHARLES COUNTY INTO NORTH ST. LOUIS
COUNTY. THIS LINE WILL SLOWLY DRIFT SOUTHEASTWARD OVER THE NEXT
TWO HOURS...WITH SOME AREAS RECEIVING TWO TO THREE INCHES OF
RAINFALL IN A SHORT PERIOD OF TIME.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
ALTON...BALLWIN...BEL-RIDGE...BELLEFONTAINE NEIGHBORS...BERKELEY...
BLACK JACK...BRENTWOOD...BRIDGETON...CENTREVILLE...CHESTERFIELD...
CLARKSON VALLEY...CLAYTON...COOL VALLEY...COTTLEVILLE...
CRESTWOOD...CREVE COEUR...DARDENNE PRAIRIE...DELLWOOD...DES
PERES...EAST ST. LOUIS...ELLISVILLE...FERGUSON...FLORISSANT...
FRONTENAC...GLENDALE...GODFREY...GRANITE CITY...HAZELWOOD...
HILLSDALE AND JENNINGS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 3848 9112 3883 9112 3891 9065 3888 9063
3887 9056 3894 9050 3895 9039 3892 9030
3893 9028 3897 9028 3900 9010 3900 9006
3858 9006
$$
BRITT3 follow-up statements
988
WGUS73 KLSX 050204
FFSLSX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
804 PM CST FRI MAR 4 2011
ILC119-163-MOC071-183-189-219-510-050600-
/O.CON.KLSX.FF.W.0001.000000T0000Z-110305T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ST. CLAIR IL-MADISON IL-FRANKLIN MO-ST. LOUIS CITY MO-ST. LOUIS MO-
ST. CHARLES MO-WARREN MO-
804 PM CST FRI MAR 4 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHEASTERN WARREN...
ST. CHARLES...ST. LOUIS...ST. LOUIS CITY...NORTHEASTERN FRANKLIN...
WESTERN MADISON AND NORTHWESTERN ST. CLAIR COUNTIES UNTIL MIDNIGHT
CST...
AT 800 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
ADDITIONAL RAIN SHOWERS AND ISOLATED THUNDERSTORMS MOVING NORTHEAST
ACROSS THE WARNED AREA. RAINFALL AMOUNTS OF 1 TO 2 INCHES HAVE
OCCURRED WITHIN THE WARNED AREA.
THE RUNOFF FROM THIS EXCESSIVE RAINFALL HAS CAUSED PONDING OF WATER
ON ROADWAYS AND ISOLATED FLASH FLOODING TO OCCUR. ADDITIONAL FLASH
FLOODING OF LOW LYING AREAS IS LIKELY...ESPECIALLY WHEN THE NEXT
ROUND OF HEAVIER RAINFALL ARRIVES AFTER 9 PM THIS EVENING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLASH FLOODING IS IMMINENT OR
OCCURRING. IF YOU ARE IN A LOW LYING FLOOD PRONED AREA...MOVE TO
HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS
SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO
NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN
DEPTH BY FOOT OR BY AUTOMOBILE.
&&
LAT...LON 3848 9112 3883 9112 3891 9065 3888 9063
3887 9056 3894 9050 3895 9039 3892 9030
3893 9028 3897 9028 3900 9010 3900 9006
3858 9006
$$
CVKING807
WGUS73 KLSX 050428
FFSLSX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1028 PM CST FRI MAR 4 2011
ILC119-163-MOC071-183-189-219-510-050600-
/O.CON.KLSX.FF.W.0001.000000T0000Z-110305T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ST. CLAIR IL-MADISON IL-FRANKLIN MO-ST. LOUIS CITY MO-ST. LOUIS MO-
ST. CHARLES MO-WARREN MO-
1028 PM CST FRI MAR 4 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHEASTERN WARREN...
ST. CHARLES...ST. LOUIS...ST. LOUIS CITY...NORTHEASTERN FRANKLIN...
WESTERN MADISON AND NORTHWESTERN ST. CLAIR COUNTIES UNTIL MIDNIGHT
CST...
AT 1022 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STEADY LIGHT TO MODERATE RAIN OVER THE WARNED AREA. DARDENNE CREEK
IN ST. CHARLES COUNTY HAS RISEN OUT OF ITS BANKS AND IS A FOOT ABOVE
FLOOD STAGE IN ST. PETERS. LOW LYING AREAS ALONG THIS CREEK WILL
EXPERIENCE FLOODING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLASH 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 3848 9112 3883 9112 3891 9065 3888 9063
3887 9056 3894 9050 3895 9039 3892 9030
3893 9028 3897 9028 3900 9010 3900 9006
3858 9006
$$
CVKING064
WGUS73 KLSX 050523
FFSLSX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1123 PM CST FRI MAR 4 2011
ILC119-163-MOC071-183-189-219-510-050537-
/O.CAN.KLSX.FF.W.0001.000000T0000Z-110305T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ST. CLAIR IL-MADISON IL-FRANKLIN MO-ST. LOUIS CITY MO-ST. LOUIS MO-
ST. CHARLES MO-WARREN MO-
1123 PM CST FRI MAR 4 2011
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHEASTERN
WARREN...ST. CHARLES...ST. LOUIS...ST. LOUIS CITY...NORTHEASTERN
FRANKLIN...WESTERN MADISON AND NORTHWESTERN ST. CLAIR COUNTIES IS
CANCELLED...
EXCESS RUNOFF FROM HEAVY RAIN WILL CONTINUE TO CAUSE LOCAL STREAMS
AND CREEKS TO RISE WITHIN BANK...BUT IT APPEARS THAT THE ONLY CREEK
THAT IS FLOODING IS DARDENNE CREEK AND THIS IS NOW COVERED WITH A
RIVER FLOOD WARNING. THEREFORE THE FLASH FLOOD WARNING IS CANCELLED.
LAT...LON 3848 9112 3883 9112 3891 9065 3888 9063
3887 9056 3894 9050 3895 9039 3892 9030
3893 9028 3897 9028 3900 9010 3900 9006
3858 9006
$$
CVKINGThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 4, 9:57 PM CST | River Flood Warning | LSX | Saint Charles | 21 hr |
Nearby
Flash Flood Warnings in Missouri, 2011Flash Flood Warnings in Illinois, 2011Every flash flood warning in 2011
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.