Alert archive / Texas / Flash Flood Warnings in 1999

Flash Flood Warning 85, NWS Austin/San Antonio, TX

July 11, 1999Val Verde County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jul 11, 1999, 8:00 AM CDT for Val Verde County, Texas. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 11, 1999, 8:00 AM CDT (13:00 UTC)
Expired
Jul 11, 1999, 12:00 PM CDT
In force
4 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Val Verde County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 1.0 hours before the alert went out and 66 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 1999-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 129 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 12:00Z on 1999-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -35 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
129 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
678 m above ground
0-6 km bulk shear
3 kt
0-1 km storm-relative helicity
-35 m²/s²
0-3 km storm-relative helicity
-9 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 
TTAA00 KEWX 111305
FFWSAT

TXC465-111700-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
800 AM CDT SUN JUL 11 1999

THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  VAL VERDE COUNTY
  
* UNTIL 1200 PM CDT

* HEAVY RAIN SHOWERS AND SOME THUNDERSTORMS WILL CONTINUE OVER 
  VAL VERDE COUNTY THE NEXT FEW HOURS...WITH LOCALLY HEAVY RAIN.

FLASH FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS... 
NORMALLY DRY WASHES AND ARROYOS...AS WELL AS FARMLAND ALONG THE 
BANKS OF CREEKS AND STREAMS WILL CONTINUE THROUGH THE MORNING.

CAMPERS SHOULD HEAD FOR HIGHER GROUND.  

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT. IT IS 
IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR 
CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS AND DO NOT DRIVE IN 
WATER COVERING THE ROAD.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 10:45 PM CDTFlash Flood WarningEWXBandera2 hr
Jul 11, 3:30 AM CDTFlash Flood WarningEWXMedina, Uvalde4 hr
Jul 11, 7:15 AM CDTFlash Flood WarningEWXBandera, Medina, Uvalde5 hr
Jul 11, 8:31 AM CDTFlash Flood WarningEWXKendall3 hr
Jul 11, 11:50 AM CDTFlash Flood WarningEWXVal Verde3 hr
Jul 11, 3:20 PM CDTFlash Flood WarningEWXLee100 min
Jul 11, 6:10 PM CDTFlash Flood WarningEWXKarnes110 min
Jul 11, 6:47 PM CDTFlash Flood WarningEWXBexar, Comal, Kendall2 hr
Jul 11, 6:47 PM CDTFlash Flood WarningEWXBandera, Real, Uvalde2 hr
Jul 11, 6:47 PM CDTFlash Flood WarningEWXMedina2 hr

Nearby

Flash Flood Warnings in Texas, 1999Every flash flood warning in 1999

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.