Alert archive / Texas / Flash Flood Warnings in 1998

Flash Flood Warning 135, NWS Austin/San Antonio, TX

August 31, 1998Bexar County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Aug 31, 1998, 3:50 PM CDT for Bexar County, Texas. It was in force for 80 min. 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 31, 1998, 3:50 PM CDT (20:50 UTC)
Expired
Aug 31, 1998, 5:10 PM CDT
In force
80 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Bexar County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 8.8 hours before the alert went out and 223 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, Corpus Christi, TX at 12:00Z on 1998-08-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2567 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, Corpus Christi, TX at 12:00Z on 1998-08-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 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
2567 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
594 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
-34 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 312050
FFWSAT
TXC029-312210-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
350 PM CDT MON AUG 31 1998

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

* FLASH FLOOD WARNING FOR...
  BEXAR COUNTY IN SOUTH CENTRAL TEXAS

* UNTIL 510 PM CDT

* FLASH FLOODING EXPECTED AROUND-
  SAN ANTONIO

* A THUNDERSTORM OVER SAN ANTONIO WAS STATIONARY AND PRODUCING
  RAINFALL RATES ESTIMATED AT 2 INCHES AN HOUR.

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 30, 7:25 PM CDTSevere Thunderstorm WarningEWXBandera65 min
Aug 30, 7:36 PM CDTSevere Thunderstorm WarningEWXHays, Travis64 min
Aug 30, 8:09 PM CDTSevere Thunderstorm WarningEWXCaldwell61 min
Aug 30, 8:35 PM CDTFlash Flood WarningEWXMedina3 hr
Aug 31, 3:30 PM CDTSevere Thunderstorm WarningEWXEdwards60 min
Aug 31, 4:37 PM CDTFlash Flood WarningEWXUvalde2 hr

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.