Alert archive / Texas / Flash Flood Warnings in 1998

Flash Flood Warning 47, NWS Austin/San Antonio, TX

July 4, 1998Hays County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jul 4, 1998, 2:13 PM CDT for Hays 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 4, 1998, 2:13 PM CDT (19:13 UTC)
Expired
Jul 4, 1998, 6:15 PM CDT
In force
4 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Hays County, TX

The radar

The Austin/San Antonio radar (KEWX), 39 km from the middle of the area, began a volume at 19:15 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

Corpus Christi, TX (KCRP), launched 12:00Z, 7.2 hours before the alert went out and 267 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 1998-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2983 joules per kilogram.LCLEL10008507005003002001001 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 1998-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 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
2983 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
538 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
2 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 041915
FFWSAT
TXC031-053-209-453-042315-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
213 PM CDT SAT JUL 4 1998

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

* FLASH FLOOD WARNING FOR...
  BURNET COUNTY IN SOUTH CENTRAL TEXAS
  BLANCO COUNTY IN SOUTH CENTRAL TEXAS
  TRAVIS COUNTY IN SOUTH CENTRAL TEXAS
  HAYS COUNTY IN SOUTH CENTRAL TEXAS

* UNTIL 615 PM CDT

* FLASH FLOODING EXPECTED AROUND-
  OVER ESCARPMENT REGION ALONG THE BLANCO/HAYS COUNTY LINES AND
BURNET/TRAVIS COUNTY LINES. RAINFALL FROM NUMEROUS
HEAVY SHOWERS AND THUNDERSTORMS WILL CROSS THE SAME AREA AS HEAVY
RAINS DID EARLIER THIS MORNING. AN ADDITIONAL RAINFALL OF 2 TO 3
INCHES IN A HOUR MAY NOT SOAK IN BUT RUN OFF INTO LOW LYING AREAS
FLOODING LOW WATER CROSSINGS.

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

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 4, 12:02 AM CDTFlash Flood WarningEWXComal, Hays3 hr
Jul 4, 1:03 AM CDTFlash Flood WarningEWXBlanco3 hr
Jul 4, 3:30 AM CDTFlash Flood WarningEWXBlanco, Burnet, Hays, Travis4 hr
Jul 4, 5:25 AM CDTFlash Flood WarningEWXBurnet, Llano3 hr
Jul 4, 2:13 PM CDTFlash Flood WarningEWXBlanco, Burnet, Travis4 hr
Jul 4, 2:43 PM CDTFlash Flood WarningEWXComal4 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; radar from the NEXRAD Level II archive.