Flash Flood Warning 212, NWS Austin/San Antonio, TX

Issued

Oct 18, 1998, 11:38 AM CDT (16:38 UTC)

Expired

Oct 18, 1998, 6:00 PM CDT

In force

6 hr

Issued by

NWS Austin/San Antonio, TX

Area

Whole counties

Counties DeWitt County, TX, Fayette County, TX, Gonzales County, TX, Karnes County, TX, Lavaca County, TX, Wilson County, TX

000 
TTAA00 KSAT 181640
FFWSAT
TXC123-149-177-255-285-493-182300-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1138 AM CDT SUN OCT 18 1998

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

* FLASH FLOOD WARNING FOR...
  FAYETTE IN TEXAS
  GONZALES IN TEXAS
  LAVACA IN TEXAS
  DEWITT IN TEXAS
  KARNES IN TEXAS
  NORTH CENTRAL WILSON IN TEXAS

* UNTIL 600 PM CDT

* AT 1125 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED HEAVY
RAINFALL IN WIDESPREAD SHOWERS AND THUNDERSTORMS ALONG AND
SOUTHEAST OF A LINE FROM LAGRANGE TO GONZALES TO KARNES CITY TO
BEEVILLE.  THE AREA WAS MOVING TOWARD THE EAST NORTHEAST AT 15
MPH.  THIS RAIN...COMBINED WITH THE EXTREME AMOUNTS FROM SATURDAY
NIGHT AND EARLIER THIS MORNING...WILL CONTINUE FLASH FLOODING
OVER LOW WATER CROSSINGS AND INTO POORLY DRAINED AREAS.  THIS IS A
DANGEROUS SITUATION...PLEASE AVOID UNNECESSARY TRAVEL THROUGH
THESE COUNTIES UNTIL THE RAIN HAS BEGUN TO DIMINISH.

  MOST SOUTH TEXAS FLOOD DEATHS OCCUR AS DRIVERS ATTEMPT TO CROSS
  FLOODED LOW WATER CROSSINGS.  THE NEXT MOST FREQUENT CAUSE OF
  DEATH IS DUE TO CHILDREN PLAYING IN OR WALKING ALONG FLOODED
  CREEKS AND STREAMS.  hBANKS ALONG THE STREAMS BECOME VERY UNSTABLE
  DUE TO THE HEAVY RAIN AND CAN SUDDENLY FAIL...DUMPING ANYONE ON
  THE BANK INTO THE FAST MOVING STREAM.

DON'T DRIVE ACROSS FLOODED ROADS! MOST FLASH FLOOD DEATHS OCCUR IN
AUTOMOBILES.

LHE

NWS Austin/San Antonio, TX wrote its last area forecast discussion before this flash flood warning went out at Oct 17, 8:20 PM CDT, 15 hours 18 minutes earlier.

COASTAL BEND FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
820 PM CDT SAT OCT 17 1998

MSTR CONTINUES TO ADVECT FM MADELINE ACRS MEXICO INTO TX. THIS MSTR
COMBINED WITH THE SFC FNT TO THE NORTH AND UPR DYNAMICS TO GENERATE
COPIOUS RAIN/TSTMS TDA JUST NORTH OF OUR CWA. NEVERTHELESS...
SCATTERED SHOWERS AND THUNDERSTORMS HAVE AFFECTED MAINLY THE CNTRL
AND ERN CWA TDA IN PART DUE TO THE RRQ OF THE UPR JET STREAK. THIS
STREAK IS PROGD BY ALL MODELS TO LIFT NEWD. THE AVN IS PREFERRED
ATTM SINCE COMPARISON WITH LAPS INDICATES THAT IT IS BETTER THAN NGM
AND ETA IN FCSTG THE SFC PRES FIELD OVR THE WRN CWA. THE AVN PROGD A
SFC LOW TO DVLP FM 00 TO 06 UTC OVR THE WRN CWA AND LAPS PRES PTNS
INDICATES SUCH. THUS EXPECT PCPN TO DVLP OVR THE WRN CWA TNGT.
WSR-88D IS BEGINNING TO INDICATE SUCH. AVN PROGS THE WRN CWA LOW TO
DMSH YET DRAGS THE SFC FNT INTO THE CWA SUN...AND KEEPS IT
QUASI-STATIONARY...WHICH WL ENHANCE CHANCE FOR SHOWERS AND
THUNDERSTORMS. SFC THETA-E VALUES ARE ALREADY GREATER THAN THAT
PROGD BY THE NGM/ETA/AVN. HIGH LOW LVL AND MID LVL MSTR WL LIKELY
RESULT IN COPIOUS RAINS OVR PTNS OF THE CWA SUN. NO CHGS TO CURRENT
PERIOD ATTM...HWR SUGGEST MENTION OF PSBL HVY RAIN IN THE ZNS FOR
SUN...AND CONSIDER PSBL ISSUANCE OF FFA.

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.