Alert archive / Texas / Flash Flood Warnings in 2012

Flash Flood Warning 20, NWS Lake Charles, LA

March 20, 2012Jasper County, Newton County, Texas

NWS Lake Charles, LA issued this flash flood warning at Mar 20, 2012, 2:27 PM CDT for Jasper County, Newton County, Texas. It was in force for 5 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
Mar 20, 2012, 2:27 PM CDT (19:27 UTC)
Expired
Mar 20, 2012, 7:00 PM CDT
In force
5 hr
Issued by
NWS Lake Charles, LA
Area
Storm-based polygon
Flood severity
None

Counties Jasper County, TX, Newton County, TX

The radar

The Lake Charles radar (KLCH), 66 km from the middle of the area, began a volume at 19:27 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

Lake Charles Mun, LA (KLCH), launched 12:00Z, 7.5 hours before the alert went out and 68 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, Lake Charles Mun, LA at 12:00Z on 2012-03-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1368 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 12:00Z on 2012-03-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 225 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
1368 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
555 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
225 m²/s²
0-3 km storm-relative helicity
338 m²/s²
Significant tornado parameter
1.2
Supercell composite
8.8

Open this sounding in Storm Lab

The text

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

431 
WGUS54 KLCH 201927
FFWLCH
TXC241-351-210000-
/O.NEW.KLCH.FF.W.0020.120320T1927Z-120321T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
227 PM CDT TUE MAR 20 2012

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL JASPER COUNTY IN SOUTHEAST TEXAS...
  SOUTHERN NEWTON COUNTY IN SOUTHEAST TEXAS...

* UNTIL 700 PM CDT

* AT 214 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  SLOW MOVING THUNDERSTORMS 2 TO 4 INCHES OF RAINFALL OVER THE PAST  
  FEW HOURS WITH AN ADDITIONAL ONE QUARTER TO ONE AND ONE HALF       
  INCHES EXPECTED THROUGH 3 PM. NEWTON COUNTY SHERIFFS OFFICE        
  REPORTED FLOODING AT NICHOLS CREEK ALONG FM 1004 AND FM 253        
  BETWEEN BUNA AND  WRIGHTS SETTLEMENT. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...BON
  WEIR...CALL...DEWEYVILLE...KIRBYVILLE...DEVILS POCKET...OLD
  SALEM...ROGANVILLE...TROUT CREEK AND WRIGHTS SETTLEMENT.


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 3083 9394 3082 9358 3063 9368 3059 9369
      3057 9373 3053 9374 3052 9371 3042 9371
      3039 9375 3034 9377 3034 9375 3029 9372
      3027 9373 3024 9386 3025 9390

$$

The office that day

Everything else NWS Lake Charles, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 20, 11:12 AM CDTAreal Flood AdvisoryLCHHardin, Jasper, Tyler3 hr
Mar 20, 11:32 AM CDTFlash Flood WarningLCHHardin, Jefferson3 hr
Mar 20, 11:58 AM CDTAreal Flood AdvisoryLCHJefferson2 hr
Mar 20, 12:40 PM CDTAreal Flood AdvisoryLCHJasper3 hr
Mar 20, 12:56 PM CDTFlash Flood WarningLCHJefferson3 hr
Mar 20, 1:23 PM CDTFlash Flood WarningLCHJasper7 hr
Mar 20, 1:32 PM CDTAreal Flood AdvisoryLCHJasper, Newton3 hr
Mar 20, 2:07 PM CDTFlash Flood WarningLCHJasper, Newton3 hr
Mar 20, 2:30 PM CDTFlash Flood WarningLCHOrange7 hr
Mar 20, 3:18 PM CDTFlash Flood WarningLCHOrange6 hr
Mar 20, 6:53 PM CDTFlash Flood WarningLCHJasper, Newton2 hr

Nearby

Flash Flood Warnings in Texas, 2012Every flash flood warning in 2012

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.