Alert archive / Missouri / Flash Flood Warnings in 2011
Flash Flood Warning 70, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Jul 7, 2011, 6:29 PM CDT for Monroe County, Randolph County, Saint Clair County, Illinois; 5 counties in Missouri. It was in force for 6 hr. 19 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
- Jul 7, 2011, 6:29 PM CDT (23:29 UTC)
- Expired
- Jul 8, 2011, 12:30 AM CDT
- In force
- 6 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Monroe County, IL, Randolph County, IL, Saint Clair County, IL, Jefferson County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 47 km from the middle of the area, began a volume at 23:29 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 |
|---|---|---|---|
| Jul 7, 6:36 PM CDT | HEAVY RAIN 1.25 | Ballwin, MO | |
| Jul 7, 6:45 PM CDT | HEAVY RAIN 1.78 | 2 Sw Mehlville, MO | |
| Jul 7, 6:50 PM CDT | HEAVY RAIN 2.2 | Oakville, MO | RAINFALL OVER THE PAST HOUR AT TELEGRAPH AND CLIFF CAVE ROAD. |
| Jul 7, 7:07 PM CDT | HEAVY RAIN 3.2 | Oakville, MO | RAINFALL SINCE 5 PM...AT TELEGRAPH AND CLIFF CAVE ROAD. |
| Jul 7, 7:13 PM CDT | FLOOD | French Village, MO | REPORT OF SIX INCHES OF WATER AT INTERSECTION OF HIGHWAY Y AND SNOWDELL ROAD. |
| Jul 7, 7:20 PM CDT | HEAVY RAIN 2.5 | Pevely, MO | ALSO AN UNKNOWN AMOUNT OF WATER OVER HIGHWAY Z NEAR A. |
| Jul 7, 7:26 PM CDT | HEAVY RAIN 2.3 | Mehlville, MO | RECEIVED 2.3 INCHES OF RAINFALL WITHIN ONE HOUR |
| Jul 7, 7:35 PM CDT | HEAVY RAIN 2.3 | 2 W Festus, MO | |
| Jul 7, 7:35 PM CDT | HEAVY RAIN 2.3 | Festus, MO | |
| Jul 7, 7:37 PM CDT | HEAVY RAIN 3 | Columbia, IL | |
| Jul 7, 7:42 PM CDT | FLASH FLOOD | 1 S French Village, MO | TWENTY INCHES OF WATER OVER HIGHWAY D AT BABIAK ROAD. |
| Jul 7, 7:45 PM CDT | HEAVY RAIN 2.3 | French Village, MO | |
| Jul 7, 7:50 PM CDT | HEAVY RAIN 3.6 | Waterloo, IL | |
| Jul 7, 7:53 PM CDT | HEAVY RAIN 2 | Festus, MO | |
| Jul 7, 8:20 PM CDT | HEAVY RAIN 5.7 | Oakville, MO | STORM TOTAL RAINFALL. |
| Jul 7, 9:00 PM CDT | HEAVY RAIN 2.75 | Columbia, IL | |
| Jul 7, 9:00 PM CDT | HEAVY RAIN 4.5 | Oakville, MO | RAINFALL SINCE 5 PM...AT TELEGRAPH AND CLIFF CAVE ROAD. |
| Jul 7, 11:28 PM CDT | FLOOD | Oakville, MO | STILL A NUMBER OF REPORTS OF FLOODING...BUT CONDITIONS ARE IMPROVING...NO ROAD CLOSURES. CLEANING DEBRIS OFF ROADWAYS. |
| Jul 7, 11:32 PM CDT | FLOOD | Columbia, IL | NUMEROUS ROADS STILL FLOODED IN THE NORTHERN PART OF THE COUNTY. |
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, 11.5 hours before the alert went out and 265 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
- 894 J/kg
- Mixed-layer CIN
- -40 J/kg
- Mixed-layer LCL
- 836 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
176
WGUS53 KLSX 072329
FFWLSX
ILC133-157-163-MOC099-186-187-189-221-080530-
/O.NEW.KLSX.FF.W.0070.110707T2329Z-110708T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
629 PM CDT THU JUL 7 2011
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
JEFFERSON COUNTY IN EAST CENTRAL MISSOURI...
MONROE COUNTY IN SOUTHWEST ILLINOIS...
NORTHEASTERN WASHINGTON COUNTY IN EAST CENTRAL MISSOURI...
NORTHWESTERN RANDOLPH COUNTY IN SOUTHWEST ILLINOIS...
SOUTHERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI...
ST. FRANCOIS COUNTY IN SOUTHEAST MISSOURI...
STE. GENEVIEVE COUNTY IN SOUTHEAST MISSOURI...
WEST CENTRAL ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS...
* UNTIL 1230 AM CDT
* AT 627 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA. JEFFERSON COUNTY SHERIFF OFFICE REPORTED WATER 8
INCHES ON HIGHWAY 30 NEAR DITTMER. ADDITIONAL HEAVY RAINFALL WILL
LIKELY PRODUCE MORE FLASH FLOODING IN THIS AREA.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
AFFTON...ANTONIA...ARNOLD...BALLWIN...BARNHART...BONNE TERRE...
BYRNES MILL...CEDAR HILL...COLUMBIA...CRESTWOOD...CRYSTAL CITY...DE
SOTO...DESLOGE...DUPO...ELLISVILLE...EUREKA...FENTON...FESTUS...
HERCULANEUM...HIGH RIDGE...HILLSBORO...KIRKWOOD...LAKESHIRE...
LEMAY...MANCHESTER...MEHLVILLE...MILLSTADT...MURPHY...OAKLAND AND
OAKVILLE.
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.
DO NOT 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.
&&
LAT...LON 3794 9097 3820 9084 3821 9078 3838 9075
3862 9062 3856 9030 3853 9026 3855 9024
3849 8990 3779 9015
$$
GKS1 follow-up statement
411
WGUS73 KLSX 080155
FFSLSX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
855 PM CDT THU JUL 7 2011
ILC133-157-163-MOC099-186-187-189-221-080530-
/O.CON.KLSX.FF.W.0070.000000T0000Z-110708T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONROE IL-RANDOLPH IL-ST. CLAIR IL-JEFFERSON MO-STE. GENEVIEVE MO-
ST. FRANCOIS MO-ST. LOUIS MO-WASHINGTON MO-
855 PM CDT THU JUL 7 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHEASTERN
WASHINGTON...SOUTHERN ST. LOUIS...ST. FRANCOIS...STE. GENEVIEVE...
JEFFERSON...WEST CENTRAL ST. CLAIR...NORTHWESTERN RANDOLPH AND MONROE
COUNTIES UNTIL 1230 AM CDT...
AT 850 PM CDT...WEATHER SPOTTERS REPORTED THAT FLASH FLOODING WAS
OCCURRING IN FRENCH VILLAGE WHERE WATER WAS ABOUT 20 INCHES DEEP
OVER HIGHWAY D AT BABIAK ROAD. OTHER WEATHER OBSERVERS REPORTED
RAINFALL AMOUNTS OF 2 TO 3 INCHES IN ABOUT ONE HOUR EARLIER THIS
EVENING. ALTHOUGH MUCH OF THE HEAVIEST RAIN WAS SHIFTING EAST OF
THIS AREA CREEKS AND STREAMS MAY CONTINUE TO RISE OR WILL STILL BE
AT HIGH LEVELS LEADING TO FLOODING OF LOW WATER CROSSINGS.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...AFFTON...
ANTONIA...ARNOLD...BALLWIN...BARNHART...BONNE TERRE...BYRNES MILL...
CEDAR HILL...COLUMBIA...CRESTWOOD...CRYSTAL CITY...DE SOTO...
DESLOGE...DUPO...ELLISVILLE...EUREKA...FENTON...FESTUS...
HERCULANEUM...HIGH RIDGE...HILLSBORO...KIRKWOOD...LAKESHIRE...
LEMAY...MANCHESTER...MEHLVILLE...MILLSTADT...MURPHY...OAKLAND AND
OAKVILLE.
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.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
&&
LAT...LON 3794 9097 3820 9084 3821 9078 3838 9075
3862 9062 3856 9030 3853 9026 3855 9024
3849 8990 3779 9015
$$
GKSThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 5:41 PM CDT | Flash Flood Warning | LSX | Fayette, Marion | 6 hr |
| Jul 7, 5:55 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Saint Clair | 50 min |
| Jul 7, 6:39 PM CDT | Areal Flood Advisory | LSX | Bond, Fayette, Greene, Jersey, Macoupin, Montgomery | 6 hr |
| Jul 6, 8:31 PM CDT | Areal Flood Advisory | LSX | Saint Louis, City of Saint Louis | 3 hr |
| Jul 7, 5:24 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Saint Francois, Washington | 24 min |
| Jul 7, 5:46 PM CDT | Areal Flood Advisory | LSX | Franklin, Jefferson, Saint Charles, Saint Louis, City of Saint Louis | 3 hr |
| Jul 7, 6:42 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Sainte Genevieve, Saint Francois | 48 min |
| Jul 7, 6:47 PM CDT | Tornado Warning | LSX | Jefferson, Sainte Genevieve, Saint Francois | 28 min |
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.