Alert archive / Missouri / Flash Flood Warnings in 2011

Flash Flood Warning 14, NWS St. Louis, MO

April 24, 20118 counties in Missouri; Monroe County, Randolph County, Illinois

NWS St. Louis, MO issued this flash flood warning at Apr 24, 2011, 12:08 AM CDT for 8 counties in Missouri; Monroe County, Randolph County, Illinois. It was in force for 12 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
Apr 24, 2011, 12:08 AM CDT (05:08 UTC)
Expired
Apr 24, 2011, 12:00 PM CDT
In force
12 hr
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Flood severity
None

Counties Monroe County, IL, Randolph County, IL, Crawford County, MO, Iron County, MO, Jefferson County, MO, Madison County, MO, Reynolds County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 120 km from the middle of the area, began a volume at 05:10 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

TimeReportWhereRemark
Apr 24, 1:30 AM CDTFLASH FLOOD8 N Fredericktown, MOROUTE OO NORTH AT DD INTERSECTION CLOSED DUE TO FLOODING.
Apr 24, 2:15 AM CDTFLOOD1 W Ellington, MOHIGH WATER FROM LOGAN CREEK 8.63 FEET AND RISING CLOSED HIGHWAY F BRIDGE WEST OF ELLINGTON.
Apr 24, 5:37 AM CDTHEAVY RAIN 1.14 N French Village, MOSINCE 7PM LAST NIGHT...RAIN HAS ENDED AT THIS POINT.
Apr 24, 5:41 AM CDTHEAVY RAIN 2.47Farmington, MOTWO DAY TOTAL 4.47 INCHES

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

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 5.1 hours before the alert went out and 290 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-pSkew-T log-p diagram, Springfield, MO at 00:00Z on 2011-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 2011-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 135 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
747 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
135 m²/s²
0-3 km storm-relative helicity
283 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.0

Open this sounding in Storm Lab

The text

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

560 
WGUS53 KLSX 240508
FFWLSX
ILC133-157-MOC055-093-099-123-179-186-187-221-241700-
/O.NEW.KLSX.FF.W.0014.110424T0508Z-110424T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1208 AM CDT SUN APR 24 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  IRON COUNTY IN SOUTHEAST MISSOURI...
  MADISON COUNTY IN SOUTHEAST MISSOURI...
  RANDOLPH COUNTY IN SOUTHWEST ILLINOIS...
  REYNOLDS COUNTY IN SOUTHEAST MISSOURI...
  SOUTHERN CRAWFORD COUNTY IN EAST CENTRAL MISSOURI...
  SOUTHERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI...
  SOUTHERN MONROE COUNTY IN SOUTHWEST ILLINOIS...
  ST. FRANCOIS COUNTY IN SOUTHEAST MISSOURI...
  STE. GENEVIEVE COUNTY IN SOUTHEAST MISSOURI...
  WASHINGTON COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL NOON CDT SUNDAY

* AT 1205 PM CDT...LOCAL LAW ENFORCEMENT AND THE MISSOURI DEPARTMENT 
OF TRANSPORTATION REPORTED FLASHING FLOODING ACROSS THE AREA. THIS 
FLOODING WAS OCCURING DUE TO WAVES OF HEAVY RAIN THAT HAVE BEEN 
TRAVERSING THE AREA SINCE LAST NIGHT. LITTLE CHANGE IS EXPECTED 
THROUGH SUNDAY MORNING...WITH MORE HEAVY RAIN FORECAST. 

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...BISMARCK...
  BONNE TERRE...CHESTER...DE SOTO...DESLOGE...FARMINGTON...
  FREDERICKTOWN...IRONTON...LEADWOOD...POTOSI...RED BUD...SPARTA...
  STE. GENEVIEVE...ANNAPOLIS...ARCADIA...BALDWIN...BELLEVIEW...
  BIXBY...BLOOMSDALE...BREMEN...BUCKHORN...CHERRYVILLE...COFFMAN...
  COULTERVILLE...COURTOIS...ELLINGTON...EVANSVILLE...GARWOOD...GLOVER
  AND IRON MOUNTAIN.

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.

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

&&

LAT...LON 3706 9097 3720 9114 3750 9122 3754 9132
      3760 9132 3760 9117 3769 9117 3780 9154
      3803 9115 3819 9058 3821 8960 3795 8960
      3781 8969 3790 8985 3788 8993 3765 9014
      3732 9015 3727 9073 3705 9079

$$

GLASS

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 23, 8:31 PM CDTRiver Flood WarningLSXCrawford4 days
Apr 23, 8:31 PM CDTRiver Flood WarningLSXCrawford, Washington7 days
Apr 23, 8:31 PM CDTRiver Flood WarningLSXFranklin, Jefferson7 days
Apr 23, 8:31 PM CDTRiver Flood WarningLSXJefferson, Saint Louis8 days
Apr 23, 8:31 PM CDTRiver Flood WarningLSXJefferson, Saint Louis9 days
Apr 23, 8:37 PM CDTRiver Flood WarningLSXFranklin3 days
Apr 23, 10:22 PM CDTSevere Thunderstorm WarningLSXCrawford, Franklin, Jefferson, Washington43 min
Apr 24, 2:53 AM CDTRiver Flood WarningLSXCallaway, Osage3 days
Apr 24, 9:25 AM CDTRiver Flood WarningLSXOsage6 days
Apr 24, 9:25 AM CDTRiver Flood WarningLSXOsage52 hr
Apr 24, 9:25 AM CDTRiver Flood WarningLSXCole36 hr
Apr 24, 9:39 AM CDTRiver Flood WarningLSXFranklin, Warren60 hr
Apr 24, 9:39 AM CDTRiver Flood WarningLSXSaint Charles, Saint Louis7 days
Apr 24, 10:57 AM CDTRiver Flood WarningLSXSaint Charles45 hr
Apr 24, 12:00 PM CDTFlash Flood WarningLSXCrawford, Iron, Jefferson, Madison, Reynolds, Sainte Genevieve and 2 more6 hr
Apr 24, 5:57 PM CDTFlash Flood WarningLSXCrawford, Iron, Jefferson, Madison, Reynolds, Sainte Genevieve and 2 more18 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.