Alert archive / Texas / Flash Flood Warnings in 1998

Flash Flood Warning 166, NWS Austin/San Antonio, TX

October 17, 1998Bexar County, Blanco County, Comal County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Oct 17, 1998, 6:28 AM CDT for Bexar County, Blanco County, Comal 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
Oct 17, 1998, 6:28 AM CDT (11:28 UTC)
Expired
Oct 17, 1998, 9:00 AM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

Counties Bexar County, TX, Blanco County, TX, Comal County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 11.5 hours before the alert went out and 242 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 00:00Z on 1998-10-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 989 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 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 00:00Z on 1998-10-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 171 square meters per square second.19395878Sfc1 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
989 J/kg
Mixed-layer CIN
-96 J/kg
Mixed-layer LCL
1132 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
171 m²/s²
0-3 km storm-relative helicity
265 m²/s²
Significant tornado parameter
0.4
Supercell composite
3.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSAT 171129
FFWSAT
TXC029-031-091-171400-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
628 AM CDT SAT OCT 17 1998

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

* FLASH FLOOD WARNING FOR...
  BLANCO IN TEXAS
  COMAL IN TEXAS
  BEXAR IN TEXAS

* UNTIL 900 AM CDT

* AT 630 AM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SHOWERS AND THUNDERSTORMS WITH VERY HEAVY RAIN OVER BEXAR...
COMAL AND BLANCO COUNTIES...MOVING TO THE NORTH AT 30 MPH.  RAINFALL
RATES  ARE NEAR TWO INCHES PER HOUR ACROSS THESE COUNTIES.

*RUNOFF WILL BE RAPID...FLOODING LOW LYING AREAS...STREETS...
STREAMS AND CREEKS.  DO NOT DRIVE INTO AREAS WHERE WATER COVERS 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
Oct 17, 8:08 AM CDTFlash Flood WarningEWXAtascosa, Frio, Medina2 hr
Oct 17, 8:27 AM CDTFlash Flood WarningEWXBexar, Comal, Hays4 hr
Oct 17, 8:27 AM CDTFlash Flood WarningEWXTravis, Williamson4 hr
Oct 17, 10:41 AM CDTFlash Flood WarningEWXBastrop, Caldwell, Guadalupe6 hr
Oct 17, 12:19 PM CDTFlash Flood WarningEWXBurnet, Travis, Williamson6 hr
Oct 17, 12:19 PM CDTFlash Flood WarningEWXBexar, Blanco, Comal, Hays, Kendall6 hr
Oct 17, 12:37 PM CDTTornado WarningEWXCaldwell63 min
Oct 17, 1:15 PM CDTTornado WarningEWXBastrop, Lee60 min
Oct 17, 4:29 PM CDTFlash Flood WarningEWXCaldwell, Guadalupe6 hr
Oct 17, 4:29 PM CDTFlash Flood WarningEWXBastrop6 hr
Oct 17, 4:45 PM CDTFlash Flood WarningEWXFayette, Gonzales6 hr
Oct 17, 5:57 PM CDTFlash Flood WarningEWXLavaca6 hr
Oct 17, 6:22 PM CDTFlash Flood WarningEWXLee5 hr
Oct 17, 6:31 PM CDTFlash Flood WarningEWXBlanco, Comal, Hays, Travis5 hr
Oct 17, 6:31 PM CDTFlash Flood WarningEWXBurnet, Williamson5 hr
Oct 17, 6:31 PM CDTFlash Flood WarningEWXBexar, Kendall5 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.