Alert archive / Missouri / Flash Flood Warnings in 2013

Flash Flood Warning 2, NWS St. Louis, MO

April 17, 2013Adams County, Pike County, Illinois; 9 counties in Missouri

NWS St. Louis, MO issued this flash flood warning at Apr 17, 2013, 7:46 PM CDT for Adams County, Pike County, Illinois; 9 counties in Missouri. It was in force for 8 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 17, 2013, 7:46 PM CDT (00:46 UTC)
Expired
Apr 18, 2013, 3:30 AM CDT
In force
8 hr
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Flood severity
None

Counties Adams County, IL, Pike County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, Knox County, MO, Lewis County, MO, Marion County, MO, Monroe County, MO, Ralls County, MO, Shelby County, MO

The radar

The St Louis radar (KLSX), 154 km from the middle of the area, began a volume at 00:49 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 17, 10:09 PM CDTHEAVY RAIN 2.96Shelbyville, MORAINFALL SO FAR THIS EVENING
Apr 18, 1:16 AM CDTHEAVY RAIN 3.61 E Novelty, MO24 HR TOTAL...STILL RAINING
Apr 18, 1:30 AM CDTHEAVY RAIN 2.77Quincy, ILRAINFALL SO FAR...STILL RAINING.
Apr 18, 3:19 AM CDTHEAVY RAIN 3.265 Sw Taylor, MOAT THE RIVER GAUGE SINCE WEDNESDAY MORNING AT 7 AM.

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, 0.8 hours before the alert went out and 304 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, Lincoln, IL at 00:00Z on 2013-04-18Temperature 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, Lincoln, IL at 00:00Z on 2013-04-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 356 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
412 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
356 m²/s²
0-3 km storm-relative helicity
444 m²/s²
Significant tornado parameter
0.0
Supercell composite
11.4

Open this sounding in Storm Lab

The text

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

446 
WGUS53 KLSX 180046
FFWLSX
ILC001-149-MOC007-019-027-103-111-127-137-173-205-180830-
/O.NEW.KLSX.FF.W.0002.130418T0046Z-130418T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
746 PM CDT WED APR 17 2013

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ADAMS COUNTY IN WEST CENTRAL ILLINOIS...
  BOONE COUNTY IN CENTRAL MISSOURI...
  LEWIS COUNTY IN NORTHEAST MISSOURI...
  MARION COUNTY IN NORTHEAST MISSOURI...
  MONROE COUNTY IN NORTHEAST MISSOURI...
  NORTHWESTERN CALLAWAY COUNTY IN CENTRAL MISSOURI...
  NORTHWESTERN PIKE COUNTY IN WEST CENTRAL ILLINOIS...
  RALLS COUNTY IN NORTHEAST MISSOURI...
  SHELBY COUNTY IN NORTHEAST MISSOURI...
  SOUTHEASTERN KNOX COUNTY IN NORTHEAST MISSOURI...
  WESTERN AUDRAIN COUNTY IN CENTRAL MISSOURI...

* UNTIL 330 AM CDT THURSDAY

* AT 744 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. ONE 
  TO TWO INCHES OF RAIN HAS ALREADY FALLEN ACROSS THE WARNED AREA AND
  UP TO AN INCH OF ADDITIONAL RAINFALL IS EXPECTED OVER THE NEXT     
  SEVERAL HOURS.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CANTON...CENTRALIA...COLUMBIA...HANNIBAL...MEXICO...MONROE CITY...
  PALMYRA...PARIS...QUINCY...SANTA FE...SHELBINA...CAMP POINT...
  CENTER...CLARENCE...CLAYTON...COLONY...EMDEN...EWING...FALL
  CREEK...GOLDEN...GRANVILLE...HALLSVILLE...KNOX CITY...LA BELLE...LA
  GRANGE...LEWISTOWN...MADISON...MAUD...MAYWOOD AND MENDON.

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.

DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF
RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE. TURN
AROUND... DONT DROWN.

&&

LAT...LON 4026 9194 4025 9150 4020 9150 4020 9092
      3997 9091 3871 9234 3876 9241 3881 9238
      3883 9244 3888 9248 3890 9248 3899 9257
      3924 9244 3925 9232 3995 9229 3996 9235
      4003 9234 4031 9195

$$

KANOFSKY
1 follow-up statement
500 
WGUS73 KLSX 180235
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
935 PM CDT WED APR 17 2013

ILC001-149-MOC007-019-027-103-111-127-137-173-205-180830-
/O.CON.KLSX.FF.W.0002.000000T0000Z-130418T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIKE IL-ADAMS IL-BOONE MO-CALLAWAY MO-KNOX MO-LEWIS MO-MARION MO-
MONROE MO-RALLS MO-SHELBY MO-AUDRAIN MO-
935 PM CDT WED APR 17 2013

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR ADAMS AND WEST CENTRAL
PIKE COUNTIES IN WEST CENTRAL ILLINOIS...AND WESTERN AUDRAIN...
NORTHWESTERN CALLAWAY AND BOONE COUNTIES IN CENTRAL MISSOURI...AND
SHELBY...RALLS...MONROE...MARION...LEWIS AND SOUTHEASTERN KNOX
COUNTIES IN NORTHEAST MISSOURI UNTIL 330 AM CDT THURSDAY...

AT 929 PM CDT...THE LATEST SATELLITE AND RADAR DATA INDICATE THAT A 
VERY SERIOUS FLASH FLOOD THREAT IS DEVELOPING FOR PARTS OF CENTRAL 
AND NORTHEAST MISSOURI AND WEST CENTRAL ILLINOIS DURING THE 
OVERNIGHT HOURS.  RAINS OF 1 TO 2 INCHES HAVE ALREADY FALLEN ALONG 
AND NORTH OF A COLUMBIA...QUINCY LINE...AND AN ADDITIONAL 1 TO 3 
INCHES IS POSSIBLE DURING THE REMAINDER OF THE NIGHT...WITH ISOLATED 
HIGHER AMOUNTS CERTAINLY POSSIBLE.  ALTHOUGH THERE MAY BE A FEW 
BRIEF BREAKS IN THE RAIN...THUNDERSTORMS ARE LINED UP FROM NORTHEAST 
MISSOURI INTO CENTRAL OKLAHOMA...AND ALL OF THESE STORMS WILL BE 
PUSHING ACROSS THE FLASH FLOOD WARNING AREA FOR THE REST OF THE 
EVENING AND INTO THE EARLY MORNING HOURS.

AGAIN...DO NOT TAKE THIS FLASH FLOOD THREAT LIGHTLY...THIS IS A 
DANGEROUS SITUATION.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO 
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING 
INCLUDE...CANTON...CENTRALIA...COLUMBIA...HANNIBAL...MEXICO...MONROE 
CITY...PALMYRA...PARIS...QUINCY...SANTA FE...SHELBINA...CAMP POINT...
CENTER...CLARENCE...CLAYTON...COLONY...EMDEN...EWING...FALL 
CREEK...GOLDEN...GRANVILLE...HALLSVILLE...KNOX CITY...LA BELLE...LA 
GRANGE...LEWISTOWN...MADISON...MAUD...MAYWOOD AND MENDON.

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.

DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF
RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE.

&&

LAT...LON 4026 9194 4025 9150 4020 9150 4020 9092
      3997 9091 3871 9234 3876 9241 3881 9238
      3883 9244 3888 9248 3890 9248 3899 9257
      3924 9244 3925 9232 3995 9229 3996 9235
      4003 9234 4031 9195

$$

TRUETT

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 17, 7:01 PM CDTTornado WarningLSXAdams29 min
Apr 17, 7:27 PM CDTTornado WarningLSXAdams, Brown, Pike33 min
Apr 17, 8:00 PM CDTTornado WarningLSXAdams, Brown30 min
Apr 18, 3:32 AM CDTFlash Flood WarningLSXAdams, Brown, Pike12 hr
Apr 18, 3:58 AM CDTWind AdvisoryLSXBond, Clinton, Fayette, Macoupin, Madison, Marion and 5 more9 hr
Apr 18, 9:10 AM CDTAreal Flood AdvisoryLSXMonroe7 hr
Apr 18, 10:21 AM CDTAreal Flood AdvisoryLSXBond, Fayette, Macoupin, Madison, Montgomery, Saint Clair8 hr
Apr 18, 11:51 AM CDTFlash Flood WarningLSXBond, Clinton, Madison, Monroe, Saint Clair6 hr
Apr 18, 12:46 PM CDTSevere Thunderstorm WarningLSXClinton, Fayette, Marion, Washington44 min
Apr 18, 2:34 PM CDTAreal Flood AdvisoryLSXClinton, Marion, Randolph, Washington4 hr
Apr 18, 6:01 PM CDTAreal Flood WarningLSXBond, Clinton, Madison, Monroe, Saint Clair18 hr
Apr 18, 6:55 PM CDTAreal Flood WarningLSXBond, Clinton, Fayette, Marion, Randolph, Washington18 hr
Apr 17, 7:39 PM CDTSevere Thunderstorm WarningLSXKnox, Lewis, Marion, Shelby51 min
Apr 17, 9:27 PM CDTSevere Thunderstorm WarningLSXMarion, Monroe, Ralls, Shelby48 min
Apr 17, 9:40 PM CDTFlash Flood WarningLSXKnox6 hr
Apr 18, 5:15 AM CDTRiver Flood WarningLSXOsage54 hr
Apr 18, 6:01 AM CDTSevere Thunderstorm WarningLSXCrawford, Washington44 min
Apr 18, 8:36 AM CDTRiver Flood WarningLSXSaint Charles55 hr
Apr 18, 3:03 PM CDTRiver Flood WarningLSXJefferson4 days
Apr 18, 3:03 PM CDTRiver Flood WarningLSXFranklin4 days
Apr 18, 3:03 PM CDTRiver Flood WarningLSXCrawford65 hr
Apr 18, 3:03 PM CDTRiver Flood WarningLSXCrawford, Washington4 days
Apr 18, 3:03 PM CDTRiver Flood WarningLSXFranklin, Jefferson5 days
Apr 18, 3:03 PM CDTRiver Flood WarningLSXJefferson, Saint Louis5 days
Apr 18, 3:03 PM CDTRiver Flood WarningLSXJefferson, Saint Louis8 days
Apr 18, 3:34 PM CDTAreal Flood WarningLSXAudrain, Boone, Knox, Lewis, Marion, Monroe and 2 more24 hr

Nearby

Flash Flood Warnings in Missouri, 2013Flash Flood Warnings in Illinois, 2013Every flash flood warning in 2013

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.