Alert archive / Texas / Flash Flood Warnings in 2012

Flash Flood Warning 14, NWS Brownsville, TX

July 13, 2012Starr County, Texas

NWS Brownsville, TX issued this flash flood warning at Jul 13, 2012, 9:03 PM CDT for Starr County, Texas. It was in force for 59 min. 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 13, 2012, 9:03 PM CDT (02:03 UTC)
Expired: Jul 13, 2012, 10:02 PM CDT
In force: 59 min
Issued by: NWS Brownsville, TX
Area: Storm-based polygon
Flood severity: None

County Starr County, TX

The radar

The Brownsville radar (KBRO), 180 km from the middle of the area, began a volume at 02:06 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

Brownsville Intl, TX (KBRO), launched 00:00Z, 2.1 hours before the alert went out and 183 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: 1262 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 1355 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

677 
WGUS54 KBRO 140203
FFWBRO
TXC427-140330-
/O.NEW.KBRO.FF.W.0014.120714T0203Z-120714T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
903 PM CDT FRI JUL 13 2012

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN STARR COUNTY IN DEEP SOUTH TEXAS...
  THIS INCLUDES THE CITIES OF...VIBORAS...FALCON DAM.

* UNTIL 1030 PM CDT

* AT 859 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS            
  INDICATED RAINFALL RATES OF THREE TO FOUR INCHES PER HOUR
  FROM STRONG THUNDERSTORMS OVER WESTERN STARR COUNTY. THESE         
  THUNDERSTORMS ARE MOVING TO THE SOUTHWEST AT 5 MPH AND WILL 
  LIKELY PRODUCE FLASH FLOODING OVER THE MAINLY RURAL AREAS OF       
  WESTERN STARR COUNTY THROUGH 1030 PM THIS EVENING.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO   
  OCCUR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS TO RISE.

DON'T BECOME A STATISTIC. TURN AROUND...DON'T DROWN!

&&

LAT...LON 2657 9917 2668 9901 2678 9895 2678 9877
      2639 9908 2643 9912 2647 9910 2649 9910
      2652 9913 2653 9916 2654 9918

$$

BILLINGS/SPEECE

1 follow-up statement

548 
WGUS74 KBRO 140302
FFSBRO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1002 PM CDT FRI JUL 13 2012

TXC427-140314-
/O.CAN.KBRO.FF.W.0014.000000T0000Z-120714T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
STARR TX-
1002 PM CDT FRI JUL 13 2012

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR WESTERN STARR 
COUNTY IS CANCELLED...

AT 959 PM...THE THUNDERSTORMS THAT WERE PRODUCING THE HEAVY RAINFALL 
OVER WESTERN STARR COUNTY HAVE WEAKENED AND RAINFALL RATES HAVE 
DIMINISHED. EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED. WATER LEVELS 
HAVE RECEDED OR WERE BEGINNING TO RECEDE...ENDING THE FLOOD THREAT. 
IF FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT TO YOUR LOCAL LAW 
ENFORCEMENT AGENCY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DON'T BECOME A STATISTIC. TURN AROUND...DON'T DROWN!

&&

LAT...LON 2657 9917 2668 9901 2678 9895 2678 9877
      2639 9908 2643 9912 2647 9910 2649 9910
      2652 9913 2653 9916 2654 9918

$$

BILLINGS

The office that day

Everything else NWS Brownsville, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 13, 7:30 PM CDT	Areal Flood Advisory	BRO	Jim Hogg	90 min
Jul 13, 8:22 PM CDT	Flash Flood Warning	BRO	Jim Hogg	101 min
Jul 13, 8:33 PM CDT	Areal Flood Advisory	BRO	Starr	117 min
Jul 13, 9:30 PM CDT	Areal Flood Advisory	BRO	Zapata	90 min
Jul 14, 6:22 PM CDT	Areal Flood Advisory	BRO	Starr	83 min

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.