Alert archive / Texas / Flash Flood Warnings in 2014

Flash Flood Warning 13, NWS Brownsville, TX

September 26, 2014Starr County, Texas

NWS Brownsville, TX issued this flash flood warning at Sep 26, 2014, 5:25 PM CDT for Starr County, Texas. It was in force for 95 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
Sep 26, 2014, 5:25 PM CDT (22:25 UTC)
Expired
Sep 26, 2014, 7:00 PM CDT
In force
95 min
Issued by
NWS Brownsville, TX
Area
Storm-based polygon
Flood severity
None

County Starr County, TX

The radar

The Brownsville radar (KBRO), 150 km from the middle of the area, began a volume at 22:25 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 12:00Z, 10.4 hours before the alert went out and 153 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, Brownsville Intl, TX at 12:00Z on 2014-09-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 906 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, Brownsville Intl, TX at 12:00Z on 2014-09-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 5 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
906 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
742 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
5 m²/s²
0-3 km storm-relative helicity
13 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.

645 
WGUS54 KBRO 262225
FFWBRO
TXC427-270000-
/O.NEW.KBRO.FF.W.0013.140926T2225Z-140927T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
525 PM CDT FRI SEP 26 2014

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL STARR COUNTY IN DEEP SOUTH TEXAS...
  THIS INCLUDES RIO GRANDE CITY.

* UNTIL 700 PM CDT

* AT 524 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE 
TRACKING SLOW MOVING THUNDERSTORMS THAT HAVE PRODUCED UP TO FOUR 
INCHES OF RAINFALL SINCE 400 PM OVER CENTRAL STARR COUNTY. HEAVY 
RAINFALL IS ALSO OCCURRING OVER RIO GRANDE CITY. ALL OF THIS 
RAINFALL IS FALLING INTO THE LOS OLMOS CREEK AND THIS CREEK IS 
EXPECTED TO LEAVE ITS BANKS AND THREATEN PROPERTY IN THE RIO GRANDE 
CITY AREA.

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

LOCATIONS IN THE WARNING INCLUDE...HIGHWAY 83...HIGHWAY 755...RIO 
GRANDE CITY...AND THE LOS OLMOS CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROAD.
THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY.
MOVE TO HIGHER GROUND.

LOW WATER CROSSINGS ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT
ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT
ONLY TAKES A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES
AWAY.

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

&&

LAT...LON 2657 9883 2662 9875 2655 9871 2649 9877
      2642 9879 2640 9880 2635 9879 2635 9880
      2637 9881 2643 9884

$$

JGG
2 follow-up statements
642 
WGUS74 KBRO 262249
FFSBRO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
549 PM CDT FRI SEP 26 2014

TXC427-270000-
/O.CON.KBRO.FF.W.0013.000000T0000Z-140927T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
STARR TX-
549 PM CDT FRI SEP 26 2014

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR CENTRAL STARR COUNTY
UNTIL 700 PM CDT...

AT 546 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED STREET 
FLOODING WAS OCCURRING IN RIO GRANDE CITY. RADAR CONTINUES TO 
INDICATE HEAVY RAINFALL FALLING IN RIO GRANDE CITY...WITH MODERATE 
TO HEAVY RAINFALL OCCURRING IN CENTRAL STARR COUNTY WHERE AS MUCH AS 
FOUR TO NEARLY FIVE INCHES OF RAIN HAS FALLEN SINCE 400 PM. RAINFALL 
IS EXPECTED TO CONTINUE THROUGH AT LEAST 630 PM AND FLOODING WILL 
WORSEN.

THE LOS OLMOS CREEK...RUNNING THROUGH THE EASTERN HALF OF THE CITY 
IS EXPECTED TO LEAVE ITS BANKS AND THREATEN PROPERTY AND POSSIBLY 
CROSS HIGHWAY 755 AND HIGHWAY 83. 

  LOCATIONS AFFECTED INCLUDE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A POTENTIALLY DANGEROUS SITUATION. THOSE ALONG THE LOS OLMOS 
CREEK SHOULD BE PREPARED TO MOVE TO HIGHER GROUND. TRAVELERS IN THE 
AREA SHOULD BE VERY ALERT TO THE POSSIBILITY OF WATER COVERING 
STREETS AND HIGHWAYS.

LOW WATER CROSSINGS ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT
ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT
ONLY TAKES A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES
AWAY.

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

&&

LAT...LON 2657 9883 2662 9875 2655 9871 2649 9877
      2642 9879 2640 9880 2635 9879 2635 9880
      2637 9881 2643 9884

$$

JGG
307 
WGUS74 KBRO 262355
FFSBRO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
655 PM CDT FRI SEP 26 2014

TXC427-270010-
/O.EXP.KBRO.FF.W.0013.000000T0000Z-140927T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
STARR TX-
655 PM CDT FRI SEP 26 2014

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR CENTRAL STARR
COUNTY WILL BE ALLOWED TO EXPIRE AT 700 PM CDT...

THE IMMEDIATE THREAT OF FLASH FLOODING APPEARS TO HAVE ENDED BUT THE 
FLASH FLOOD WARNING HAS BEEN REPLACED BY A FLOOD ADVISORY THROUGH 
EARLY THIS EVENING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2657 9883 2662 9875 2655 9871 2649 9877
      2642 9879 2640 9880 2635 9879 2635 9880
      2637 9881 2643 9884

$$

JGG

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 26, 4:44 PM CDTAreal Flood AdvisoryBROStarr61 min
Sep 26, 6:54 PM CDTAreal Flood AdvisoryBROStarr96 min

Nearby

Flash Flood Warnings in Texas, 2014Every flash flood warning in 2014

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.