Alert archive / Texas / Flash Flood Warnings in 1998

Flash Flood Warning 131, NWS Austin/San Antonio, TX

August 29, 1998Val Verde County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Aug 29, 1998, 5:01 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 counties it named.

The facts

Issued
Aug 29, 1998, 5:01 PM CDT (22:01 UTC)
Expired
Aug 29, 1998, 8:00 PM CDT
In force
3 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, 10.0 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 1998-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 920 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 1998-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -5 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
920 J/kg
Mixed-layer CIN
-69 J/kg
Mixed-layer LCL
1272 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
-5 m²/s²
0-3 km storm-relative helicity
94 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 KSAT 292203 RRA
FFWSAT
TXC465-300100-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
501 PM CDT SAT AUG 29 1998

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

* FLASH FLOOD WARNING FOR...
  VAL VERDE COUNTY IN SOUTH CENTRAL TEXAS

* UNTIL 800 PM CDT

* AT 500 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SCATTERED SHOWERS AND THUNDERSTORMS DEVELOPING OVER MUCH OF VAL
  VERDE COUNTY. RAINFALL RATES OF 1 INCH PER HOUR WILL CAUSE
  FLOODING ESPECIALLY NEAR LOW WATER CROSSINGS AND LOW LYING AREAS.

IF YOU ARE IN THESE AREAS... MOVE TO HIGHER GROUND. DO NOT DRIVE
THROUGH WATER COVERING THE ROAD.

AREA RESIDENTS SHOULD MONITOR FLOOD CONDITIONS... AND BE PREPARED
TO MOVE TO HIGHER GROUND... SHOULD FLOOD WATERS THREATEN. IF FLASH
FLOODING IS OBSERVED... ACT QUICKLY. MOVE TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 29, 4:47 PM CDTSevere Thunderstorm WarningEWXBurnet43 min
Aug 29, 5:56 PM CDTSevere Thunderstorm WarningEWXVal Verde94 min
Aug 29, 6:14 PM CDTSevere Thunderstorm WarningEWXWilliamson61 min
Aug 29, 6:28 PM CDTSevere Thunderstorm WarningEWXTravis62 min
Aug 29, 6:31 PM CDTSevere Thunderstorm WarningEWXTravis59 min
Aug 29, 6:39 PM CDTTornado WarningEWXTravis61 min
Aug 29, 6:46 PM CDTTornado WarningEWXTravis59 min

Nearby

Flash Flood Warnings in Texas, 1998Every flash flood warning in 1998

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.