Alert archive / Texas / Flash Flood Warnings in 2014

Flash Flood Warning 22, NWS Austin/San Antonio, TX

June 20, 2014Val Verde County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jun 20, 2014, 4:09 AM CDT for Val Verde 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
Jun 20, 2014, 4:09 AM CDT (09:09 UTC)
Expired
Jun 20, 2014, 7:00 AM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon
Flood severity
None

County Val Verde County, TX

The radar

The Laughlin AFB radar (KDFX), 109 km from the middle of the area, began a volume at 09:10 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

Del Rio, TX (KDLF), launched 00:00Z, 9.2 hours before the alert went out and 56 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, Del Rio, TX at 00:00Z on 2014-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 191 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, Del Rio, TX at 00:00Z on 2014-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -36 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
191 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
978 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-36 m²/s²
0-3 km storm-relative helicity
33 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.6

Open this sounding in Storm Lab

The text

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

106 
WGUS54 KEWX 200909
FFWEWX
TXC465-201200-
/O.NEW.KEWX.FF.W.0022.140620T0909Z-140620T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
409 AM CDT FRI JUN 20 2014

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  VAL VERDE COUNTY IN SOUTH CENTRAL TEXAS...
  THIS INCLUDES THE CITIES OF...LOMA ALTA...LANGTRY...DEL RIO...
  COMSTOCK...

* UNTIL 700 AM CDT

* AT 401 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE 
DETERMINED THAT RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE   
FLASH FLOODING FROM THUNDERSTORMS IS OCCURRING OVER THE WARNED 
AREA. BETWEEN 2 AND 4 INCHES OF RAINFALL HAS OCCURRED ACROSS 
SOUTHERN VAL VERDE COUNTY...WITH AN ADDITIONAL 1 TO 3 INCHES 
POSSIBLE IN MANY LOCATIONS ACROSS THE COUNTY AS THE THUNDERSTORMS 
WITH HEAVY RAINFALL MOVE NORTH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
DEL RIO...AMISTAD VILLAGE...SHUMLA...PUMPVILLE...OSMAN...SEMINOLE 
CANYON STATE PARK AND LOMA ALTA

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 RISING.

&&

LAT...LON 3011 10176 3012 10176 3005 10070 2940 10070
      2924 10076 2924 10081 2935 10100 2946 10109
      2951 10124 2959 10126 2957 10130 2964 10131
      2964 10136 2977 10147 2975 10154 2979 10155
      2974 10165 2978 10177

$$
1 follow-up statement
552 
WGUS74 KEWX 201002
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
502 AM CDT FRI JUN 20 2014

TXC465-201200-
/O.CON.KEWX.FF.W.0022.000000T0000Z-140620T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
VAL VERDE TX-
502 AM CDT FRI JUN 20 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 AM CDT FOR VAL
VERDE COUNTY...

AT 455 AM CDT...NWS METEOROLOGISTS CONTINUED TO DETECT A 
THUNDERSTORMS PRODUCING FLASH FLOODING OVER THE WARNED AREA. BETWEEN 
3 AND 5 INCHES OF RAINFALL HAS OCCURRED ACROSS SOUTHERN VAL VERDE 
COUNTY...WITH AN ADDITIONAL 2 TO 4 INCHES POSSIBLE IN MANY LOCATIONS 
ACROSS THE SOUTHERN AND CENTRAL PART OF THE COUNTY AS THE ADDITIONAL 
THUNDERSTORMS WITH VERY HEAVY RAINFALL MOVE NORTH.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO DEL 
RIO...AMISTAD VILLAGE...LAKE VIEW...ROUGH CANYON RECREATION 
AREA...AND SEMINOLE CANYON STATE PARK.

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 RISING.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 3011 10176 3012 10176 3005 10070 2940 10070
      2924 10076 2924 10081 2935 10100 2946 10109
      2951 10124 2959 10126 2957 10130 2964 10131
      2964 10136 2977 10147 2975 10154 2979 10155
      2974 10165 2978 10177

$$

JR

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 19, 7:04 PM CDTAreal Flood AdvisoryEWXKinney, Maverick3 hr
Jun 19, 7:31 PM CDTSpecial Weather StatementEWXKinney59 min
Jun 19, 7:32 PM CDTFlash Flood WarningEWXMaverick3 hr
Jun 19, 8:08 PM CDTFlash Flood WarningEWXKinney, Val Verde5 hr
Jun 19, 10:12 PM CDTFlash Flood WarningEWXKinney3 hr
Jun 20, 12:49 AM CDTFlash Flood WarningEWXKinney, Maverick3 hr
Jun 20, 1:09 AM CDTFlash Flood WatchEWXEdwards, Kinney, Maverick, Val Verde11 hr
Jun 20, 1:56 AM CDTFlash Flood WarningEWXVal Verde3 hr
Jun 20, 3:46 AM CDTFlash Flood WarningEWXEdwards, Kinney, Maverick3 hr
Jun 20, 6:41 AM CDTRiver Flood WarningEWXVal Verde15 hr
Jun 20, 7:02 AM CDTFlash Flood WarningEWXVal Verde3 hr
Jun 20, 7:10 AM CDTAreal Flood AdvisoryEWXEdwards, Kinney, Maverick110 min
Jun 20, 10:04 AM CDTFlash Flood WarningEWXVal Verde3 hr
Jun 20, 10:12 AM CDTAreal Flood AdvisoryEWXEdwards, Kinney, Maverick, Val Verde8 hr
Jun 20, 11:01 AM CDTRiver Flood WarningEWXVal Verde10 hr
Jun 20, 11:47 AM CDTRiver Flood WarningEWXVal Verde21 hr

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.