Flash Flood Warning 171, NWS Austin/San Antonio, TX

Issued

Oct 17, 1998, 12:19 PM CDT (17:19 UTC)

Expired

Oct 17, 1998, 6:10 PM CDT

In force

6 hr

Issued by

NWS Austin/San Antonio, TX

Area

Whole counties

Counties Burnet County, TX, Travis County, TX, Williamson County, TX

000 
TTAA00 KSAT 171721
FFWSAT
TXC029-031-053-091-209-259-453-491-172310-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1219 PM CDT SAT OCT 17 1998

...URGENT...URGENT...URGENT...

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

* FLASH FLOOD WARNING FOR...
  BURNET IN TEXAS
  WILLIAMSON IN TEXAS
  BLANCO IN TEXAS
  TRAVIS IN TEXAS
  KENDALL IN TEXAS
  COMAL IN TEXAS
  HAYS IN TEXAS
  BEXAR IN TEXAS

  INCLUDING THE AUSTIN AND SAN ANTONIO METROPOLITAN AREAS

* UNTIL 610 PM CDT

* AT 12 NOON CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A LARGE AREA OF THUNDERSTORMS WITH VERY HEAVY RAIN BETWEEN SAN
  ANTONIO AND GEORGETOWN...MOVING EAST-NORTHEAST 15 MPH.

CLOSE TO 15 INCHES OF RAIN HAS FALLEN IN SOME PARTS OF SOUTH CENTRAL
AND CENTRAL TEXAS...AND PARTS OF THE TEXAS HILL COUNTRY TO THE NORTH
OF SAN ANTONIO AND WEST OF AUSTIN...THIS MORNING.  MORE RAINFALL IS
APPROACHING THESE AREAS WHERE VERY DANGEROUS FLOODING IS OCCURRING.

ALL CREEKS...RIVERS AND TRIBUTARIES IN SOUTH CENTRAL AND CENTRAL
TEXAS...AND THE TEXAS HILL COUNTRY...ARE FLOODED.  NUMEROUS ROAD...
HIGHWAY AND STREET CLOSURES HAVE BEEN REPORTED THROUGHOUT SOUTH
CENTRAL AND CENTRAL TEXAS.

ADDITIONAL TOTALS IN EXCESS OF 5 INCHES COULD OCCUR IN THE WARNED
AREA THIS AFTERNOON.  SINCE THE GROUND IS SUPER-SATURATED FROM
EARLIER DELUGES...THIS ADDITIONAL RAINFALL WILL NOT SOAK IN BUT
RUN OFF INTO ALREADY FLOODED CREEKS...RIVERS AND DRAINAGE BASINS...
GREATLY ADDING TO THE HIGH THREAT FOR MAJOR FLOODING.

THIS IS A VERY DANGEROUS AND LIFE-THREATING HEAVY RAIN AND FLOOD
SITUATION.  THE WEATHER SERVICE CANNOT STRESS ENOUGH THE SEVERITY
OF THIS FLOOD SITUATION.  ALL TRAVEL IS DISCOURAGED...STAY HOME.
DON'T DRIVE ACROSS FLOODED ROADS!  MOST FLASH FLOOD DEATHS OCCUR IN
AUTOMOBILES.

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.

A FLASH FLOOD WATCH REMAINS IN EFFECT FOR ALL OF SOUTH CENTRAL AND
CENTRAL TEXAS...AND THE TEXAS HILL COUNTRY...THROUGH THIS AFTERNOON.

ADDITIONAL WARNINGS OR BULLETINS CONCERNING THIS VERY DANGEROUS
FLOOD SITUATION WILL BE BROADCAST OVER LOCAL RADIO AND TV
STATIONS...THE WEATHER CHANNEL...CABLE TV STATIONS...AND NOAA
WEATHER RADIO UNTIL CONDITIONS IMPROVE.

NWS Austin/San Antonio, TX wrote its last area forecast discussion before this flash flood warning went out at Oct 16, 7:25 PM CDT, 16 hours 54 minutes earlier.

COASTAL BEND FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
725 PM CDT FRI OCT 16 1998

EXPECT ISOLATED SHOWERS TO CONTINUE ACROSS THE CWA...MAINLY OVR THE
COSATAL WATERS...OVERNIGHT IN RESPONSE TO INFLUX OF MSTR FROM THE
GULF AND TROPICAL CONNECTION FROM MADELINE. CURRENT TEMP FCST FOR
TNGT LOOKS GOOD BASED ON CURRENT LAPS DEW POINT TREND PAST FEW
HOURS. ETA MODEL SOUNDINGS PROG LOW LVL CONDITIONS CLOSE TO DRY
ADIABATIC OVERNIGHT OVR THE COASTAL BEND WHICH MAY KEEP WINDS UP
OVERNIGHT ALG THE COAST...HWR CURRENT FCST OF WNDS LOOK REASONABLE
ATTM. NO CHGS ATTM.

ALTHOUGH MODELS PROG WEAK SHRTWVS ACRS THE CWA SAT...THE MAIN
DYNAMIC INFLUENCE SAT WL LIKELY BE THE RRQ OF UPR JET STREAK PROGD
BY ALL SOLNS TO MOV ACRS CNTRL TX. IN ADDITION...THE LLJ WL PERSIST
SAT AND COMBINE WITH THE UPSTREAM SFC FNT...AND UPR DISTURBANCE...
TO ENHANCE MSTR CONVERGENCE OVR CNTRL TX. THUS HEAVY RAIN IS PSBL
OVR THE NRN CWA SAT AFTN/NGT. HVY RAIN IS ALSO POSSIBLE OVR THE WRN
CWA AS THE AVN...AND TO A LESSOR EXTENT THE NGM...PROG AN INCREASE
IN 850 THETA-E ACRS THE WRN CWA DRG THE DAY SAT. THE COMBINATION OF
LOW LVL THETA-E RDGS AND MID LVL MSTR...SEEN ON WATER VAPOR IMAGERY
FM THE TROPICAL CONNECTION...IS CONDUSIVE TO HVY RAIN. THUS THE
NRN/WRN CWA SHOULD BE MONITORED FOR PSBL FLASH FLOOD WATCH SAT. WND
ADVISORY CRITERIA PSBL AGAIN SAT AS 850 MB 35 KT WNDS MIX DOWNWARD.

87

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

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.