Alert archive / Missouri / Flash Flood Warnings in 2015

Flash Flood Warning 53, NWS St. Louis, MO

July 11, 2015Knox County, Lewis County, Missouri

NWS St. Louis, MO issued this flash flood warning at Jul 11, 2015, 11:26 PM CDT for Knox County, Lewis County, Missouri. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 11, 2015, 11:26 PM CDT (04:26 UTC)
Expired
Jul 12, 2015, 5:30 AM CDT
In force
6 hr
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Flood severity
None

Counties Knox County, MO, Lewis County, MO

The radar

The Quad Cities radar (KDVN), 198 km from the middle of the area, began a volume at 04:28 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.

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 4.4 hours before the alert went out and 203 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, Davenport, at 00:00Z on 2015-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 16 joules per kilogram.LCLLFCEL10008507005003002001001 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, Davenport, at 00:00Z on 2015-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 98 square meters per square second.193958Sfc1 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
16 J/kg
Mixed-layer CIN
-148 J/kg
Mixed-layer LCL
685 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
98 m²/s²
0-3 km storm-relative helicity
174 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

162 
WGUS53 KLSX 120426
FFWLSX
MOC103-111-121030-
/O.NEW.KLSX.FF.W.0053.150712T0426Z-150712T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1126 PM CDT SAT JUL 11 2015

THE NATIONAL WEATHER SERVICE IN ST LOUIS  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  KNOX COUNTY IN NORTHEASTERN MISSOURI...
  WESTERN LEWIS COUNTY IN NORTHEASTERN MISSOURI...

* UNTIL 530 AM CDT SUNDAY
    
* AT 1123 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING 
  HEAVY RAIN ACROSS THE WARNED AREA. FLASH FLOODING IS EXPECTED TO 
  BEGIN SHORTLY. THUNDERSTORMS WITH HIGH RAINFALL RATES WILL 
  CONTINUE TO MOVE THROUGH KNOX COUNTY OVERNIGHT.  THE DOPPLER RADAR 
  WAS ESTIMATING RAINFALL AMOUNTS UP TO 2 TO 3 INCHES DURING THE 
  PAST HOUR IN NORTHEAST KNOX COUNTY BETWEEN COLONY AND EDINA.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  EDINA...LA BELLE...KNOX CITY...COLONY...STEFFENVILLE...
  GREENSBURG...HURDLAND...BARING AND NEWARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 4030 9195 4026 9195 4025 9189 3995 9182
      4005 9227 4030 9235

$$

GKS
2 follow-up statements
321 
WGUS73 KLSX 120734
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
234 AM CDT SUN JUL 12 2015

MOC103-111-121030-
/O.CON.KLSX.FF.W.0053.000000T0000Z-150712T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KNOX MO-LEWIS MO-
234 AM CDT SUN JUL 12 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 AM CDT SUNDAY
FOR KNOX AND WESTERN LEWIS COUNTIES...

AT 229 AM CDT...DOPPLER RADAR INDICATED MOST OF THE THUNDERSTORMS 
THAT PRODUCED THE HEAVY RAIN HAVE MOVED OUT OF THE COUNTY. HOWEVER 
SCATTERED THUNDERSTORMS HAVE FORMED TO THE NORTHWEST AND WILL MOVE 
SOUTHEAST INTO THE COUNTY. AN ADDITIONAL HALF TO ONE INCH OF RAIN IS 
POSSIBLE BEFORE THE RAIN ENDS. UP TO THREE INCHES OF RAIN HAVE 
ALREADY FALLEN WITH SOME AREAS ACROSS THE NORTHEAST CORNER RECEIVING 
CLOSER TO 4 INCHES. 

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
EDINA...LA BELLE...KNOX CITY...COLONY...STEFFENVILLE...GREENSBURG...
HURDLAND...BARING AND NEWARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE. LOW 
LYING ROADS WILL LIKELY FLOOD. SOME SMALL CREEKS AND STREAMS WILL 
ALSO LIKELY FLOOD. 

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 4030 9195 4026 9195 4025 9189 3995 9182
      4005 9227 4030 9235

$$

KRAMPER
132 
WGUS73 KLSX 121039
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
539 AM CDT SUN JUL 12 2015

MOC103-111-121048-
/O.EXP.KLSX.FF.W.0053.000000T0000Z-150712T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KNOX MO-LEWIS MO-
539 AM CDT SUN JUL 12 2015

...THE FLASH FLOOD WARNING FOR KNOX AND WESTERN LEWIS COUNTIES HAS
EXPIRED...

FLOOD WATERS HAVE RECEDED...AND ARE NO LONGER EXPECTED TO POSE A
THREAT TO LIFE OR PROPERTY. PLEASE CONTINUE TO HEED ANY ROAD
CLOSURES.

LAT...LON 4030 9195 4026 9195 4025 9189 3995 9182
      4005 9227 4030 9235

$$

BROWNING

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 11, 8:25 PM CDTRiver Flood WarningLSXLewis3 days
Jul 11, 8:25 PM CDTRiver Flood WarningLSXLewis3 days
Jul 11, 9:58 PM CDTFlash Flood WarningLSXLewis6 hr
Jul 11, 10:50 PM CDTRiver Flood WarningLSXLewis62 hr
Jul 11, 10:50 PM CDTRiver Flood WarningLSXMarion68 hr
Jul 11, 10:50 PM CDTRiver Flood WarningLSXMarion4 days
Jul 11, 10:50 PM CDTRiver Flood WarningLSXRalls4 days
Jul 11, 10:50 PM CDTRiver Flood WarningLSXPike5 days
Jul 11, 10:50 PM CDTRiver Flood WarningLSXPike5 days
Jul 12, 12:18 AM CDTSpecial Weather StatementLSXRalls42 min
Jul 12, 1:25 AM CDTAreal Flood AdvisoryLSXMarion3 hr
Jul 12, 2:15 AM CDTRiver Flood WarningLSXMarion50 hr
Jul 12, 2:20 AM CDTAreal Flood AdvisoryLSXPike, Ralls3 hr
Jul 12, 2:52 AM CDTFlash Flood WarningLSXMarion3 hr
Jul 12, 9:40 AM CDTRiver Flood WarningLSXOsage3 days
Jul 12, 9:56 AM CDTRiver Flood WarningLSXMarion60 hr
Jul 12, 4:19 PM CDTRiver Flood WarningLSXLincoln5 days

Nearby

Flash Flood Warnings in Missouri, 2015Every flash flood warning in 2015

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.