Alert archive / Texas / Flash Flood Warnings in 2012

Flash Flood Warning 32, NWS Lake Charles, LA

July 12, 2012Hardin County, Texas

NWS Lake Charles, LA issued this flash flood warning at Jul 12, 2012, 11:34 AM CDT for Hardin County, Texas. It was in force for 3 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 12, 2012, 11:34 AM CDT (16:34 UTC)
Expired: Jul 12, 2012, 2:30 PM CDT
In force: 3 hr
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Flood severity: None

County Hardin County, TX

The radar

The Houston radar (KHGX), 111 km from the middle of the area, began a volume at 16:37 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, 4.6 hours before the alert went out and 144 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2309 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 713 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 103 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

066 
WGUS54 KLCH 121634
FFWLCH
TXC199-121930-
/O.NEW.KLCH.FF.W.0032.120712T1634Z-120712T1930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1134 AM CDT THU JUL 12 2012

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WEST CENTRAL HARDIN COUNTY IN SOUTHEAST TEXAS...

* UNTIL 230 PM CDT

* AT 1127 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR            
  INDICATED   AN AREA OF VERY HEAVY RAINFALL ACROSS THE WARNED AREA  
  PRODUCING RAINFALL RATES OF 1 TO 2 INCHES PER HOUR. SINCE 6        
  AM...RAINFALL AMOUNTS OF 2 TO 4 INCHES HAVE FALLEN ACROSS WEST     
  CENTRAL HARDIN COUNTY FROM NEAR VOTAW DOWN TO BATSON. THIS WILL    
  LIKELY CAUSE SMALL STREAMS TO FLOOD THEIR BANKS. SOME OF THE       
  DRAINAGES THAT ARE LIKELY TO EXPIERENCE FLOODING ARE THE UPPER     
  REACHES OF PINE ISLAND BAYOU AND MENARD CREEK WEST OF VOTAW.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  THICKET...BATSON AND VOTAW.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE WARNED 
AREA.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

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 3050 9465 3049 9457 3025 9459 3021 9464
      3022 9464 3045 9473 3047 9473 3050 9473

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 8:14 AM CDT	Areal Flood Advisory	LCH	Jasper, Tyler	3 hr
Jul 12, 8:51 AM CDT	Areal Flood Advisory	LCH	Hardin, Jasper, Jefferson, Newton, Tyler	3 hr
Jul 12, 9:42 AM CDT	Areal Flood Advisory	LCH	Jefferson	3 hr
Jul 12, 11:11 AM CDT	River Flood Warning	LCH	Hardin, Jefferson	10 days
Jul 12, 12:21 PM CDT	Areal Flood Advisory	LCH	Jasper	3 hr
Jul 12, 2:30 PM CDT	Flash Flood Warning	LCH	Hardin	3 hr

Nearby

Flash Flood Warnings in Texas, 2012 Every 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.