Alert archive / Texas / Flash Flood Warnings in 2005

Flash Flood Warning 34, NWS Austin/San Antonio, TX

July 16, 2005Val Verde County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jul 16, 2005, 3:21 PM 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
Jul 16, 2005, 3:21 PM CDT (20:21 UTC)
Expired
Jul 16, 2005, 6:15 PM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

County Val Verde County, TX

The radar

The Laughlin AFB radar (KDFX), 104 km from the middle of the area, began a volume at 20:22 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 (KDRT), launched 12:00Z, 8.4 hours before the alert went out and 52 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 12:00Z on 2005-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1033 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 12:00Z on 2005-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 square meters per square second.1939Sfc1 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
1033 J/kg
Mixed-layer CIN
-70 J/kg
Mixed-layer LCL
669 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
-16 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.

000 
WGUS54 KEWX 162024
FFWEWX
TXC465-162315-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
321 PM CDT SAT JUL 16 2005

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES...
  VAL VERDE

* UNTIL 615 PM CDT

* AT 316 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  VERY HEAVY RAIN FROM VERY SLOW MOVING THUNDERSTORMS OVER THE 
  WARNED AREA.

RADAR ESTIMATES SUGGEST AROUND 3 INCHES OF RAIN HAD FALLEN ALONG US 
HIGHWAY 377 SOUTH OF LOMA ALTA IN THE PAST HOUR. THUNDERSTORMS WILL 
SPREAD SLOWLY SOUTHWEST AT AROUND 5 MPH TOWARD THE DEL RIO AREA AND 
POSSIBLY BRING FLASH FLOODING RAINS INTO THE CITY BY 5 PM.

REPORT FLASH FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY FOR RELAY
TO THE NATIONAL WEATHER SERVICE.

LAT...LON 2970 10138 2965 10138 2964 10132 2958 10131
      2959 10125 2953 10126 2947 10109 2937 10101
      2924 10081 2925 10077 2944 10070 3029 10070
      3028 10176 3028 10176 2978 10176 2978 10147

$$
1 follow-up statement
000 
WGUS74 KEWX 162228
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
526 PM CDT SAT JUL 16 2005

TXC465-162315-
VAL VERDE TX-
526 PM CDT SAT JUL 16 2005

...A FLASH FLOOD WARNING CONTINUES UNTIL 615 PM CDT FOR VAL VERDE
COUNTY...

AT 520 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORMS PRODUCING VERY HEAVY RAIN OVER THE EASTERN 
PORTIONS OF THE WARNED AREA.

LOCATIONS IN THE WARNING INCLUDE SEMINOLE CANYON STATE PARK...LOMA 
ALTA...AND ALONG HIGHWAY 90 AND HIGHWAY 277.

HEAVY RAINFALL WILL CAUSE FLASH FLOODING OVER SMALL CREEKS AND
STREAMS...URBAN AREAS...HIGHWAYS...STREETS...UNDERPASSES AND POORLY
DRAINED AREAS.

FLASH FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED AREAS. A LITTLE
OVER A FOOT OF WATER CAN CARRY AWAY MOST CARS AND TRUCKS. TURN AROUND
DONT DROWN.

LAT...LON 2970 10138 2965 10138 2964 10132 2958 10131
      2959 10125 2953 10126 2947 10109 2937 10101
      2924 10081 2925 10077 2944 10070 3029 10070
      3028 10176 3028 10176 2978 10176 2978 10147

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 16, 9:55 AM CDTFlash Flood WarningEWXComal3 hr
Jul 16, 3:48 PM CDTFlash Flood WarningEWXEdwards, Real3 hr
Jul 16, 6:13 PM CDTFlash Flood WarningEWXVal Verde62 min
Jul 16, 6:32 PM CDTFlash Flood WarningEWXBandera, Gillespie, Kerr3 hr

Nearby

Flash Flood Warnings in Texas, 2005Every flash flood warning in 2005

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.