Alert archive / Texas / Flash Flood Warnings in 2012

Flash Flood Warning 37, NWS Lake Charles, LA

July 13, 2012Jefferson County, Texas

NWS Lake Charles, LA issued this flash flood warning at Jul 13, 2012, 10:44 AM CDT for Jefferson County, Texas. It was in force for 4 hr. 1 report 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: Jul 13, 2012, 10:44 AM CDT (15:44 UTC)
Expired: Jul 13, 2012, 3:00 PM CDT
In force: 4 hr
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Flood severity: None

County Jefferson County, TX

The radar

The Houston radar (KHGX), 89 km from the middle of the area, began a volume at 15:47 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

Time	Report	Where	Remark
Jul 13, 1:13 PM CDT	FLASH FLOOD	1 Wnw Fannett, TX	MEDIA REPORTED WATER OVER DITCHES AND CLOSE TO HOUSES

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

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 3.7 hours before the alert went out and 111 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: 1723 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 567 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.1

Open this sounding in Storm Lab

The text

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

017 
WGUS54 KLCH 131544
FFWLCH
TXC245-132000-
/O.NEW.KLCH.FF.W.0037.120713T1544Z-120713T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1044 AM CDT FRI JUL 13 2012

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

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

* UNTIL 300 PM CDT

* AT 1038 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA. THIS WARNING IS AN EXTENSION THE PREVIOUS WARNING TO  
  THE SOUTH AND EAST AS HEAVY RAINS CONTINUE TO MOVE OVER THE SAME    
  GENERAL AREA IN WESTERN JEFFERSON COUNTY. RAINFALL ESTIMATES SINCE 
  8 AM HAVE BEEN BETWEEN 2 AND 4 INCHES WITH DRAINAGE DISTRICT 6     
  GAUGES REPORTING THREE HOURLY RAINFALL AMOUNTS OF AROUND 3 INCHES  
  AROUND FANNETT. THIS HEAVY RAIN WILL DRAIN INTO THE NORTH FORK OF  
  TAYLORS BAYOU AND DIN BAYOU. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  HAMSHIRE...NOME...FANNETT AND LA BELLE.

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 3008 9444 2995 9427 2996 9406 2986 9413
      2985 9436 2988 9437 2988 9444 2989 9445
      3007 9445

$$

1 follow-up statement

275 
WGUS74 KLCH 131659
FFSLCH

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1159 AM CDT FRI JUL 13 2012

TXC245-132000-
/O.CON.KLCH.FF.W.0037.000000T0000Z-120713T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JEFFERSON TX-
1159 AM CDT FRI JUL 13 2012

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR WEST CENTRAL JEFFERSON
COUNTY UNTIL 300 PM CDT...

AT 1154 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT LIGHT TO MODERATE RAINFALL CONTINUES ACROSS THE WARNED AREA. 
RADAR AND RAIN GAUGE ESTIMATES INDICATE A LARGE AREA OF 3 TO 5 INCH 
RAINFALL TOTALS SINCE 6 AM THIS MORNING. THE HIGHEST MEASURED REPORT 
DURING THAT TIME HAS BEEN 5.04 INCHES AT GREEN POND GULLY AT HIGHWAY 
365. THIS WILL IMPACT THE NORTH FORK OF TAYLORS IN THE NOME AND 
FANNETT AREA.  

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING 
INCLUDE...HAMSHIRE...NOME...FANNETT AND LA BELLE.

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.

&&

LAT...LON 3008 9444 2995 9427 2996 9406 2986 9413
      2985 9436 2988 9437 2988 9444 2989 9445
      3007 9445

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 5:32 AM CDT	Areal Flood Advisory	LCH	Hardin, Jasper, Jefferson, Newton, Orange, Tyler	118 min
Jul 13, 6:00 AM CDT	Areal Flood Advisory	LCH	Jasper, Newton, Tyler	105 min
Jul 13, 6:05 AM CDT	Flash Flood Warning	LCH	Hardin, Jefferson, Orange	3 hr
Jul 13, 7:49 AM CDT	Areal Flood Advisory	LCH	Jasper, Newton, Tyler	116 min
Jul 13, 8:56 AM CDT	Flash Flood Warning	LCH	Hardin, Jefferson, Orange	6 hr
Jul 13, 9:46 AM CDT	Areal Flood Advisory	LCH	Jasper, Newton, Tyler	119 min
Jul 13, 10:33 AM CDT	Flash Flood Warning	LCH	Hardin	4 hr
Jul 13, 11:50 AM CDT	Areal Flood Advisory	LCH	Jasper, Tyler	3 hr
Jul 13, 2:52 PM CDT	Areal Flood Warning	LCH	Hardin	24 hr
Jul 13, 2:57 PM CDT	Areal Flood Warning	LCH	Jefferson	24 hr
Jul 13, 3:04 PM CDT	Areal Flood Warning	LCH	Orange	7 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.