Flash Flood Warning 187, NWS Austin/San Antonio, TX

Issued

Oct 17, 1998, 11:27 PM CDT (04:27 UTC)

Expired

Oct 18, 1998, 3:00 AM CDT

In force

4 hr

Issued by

NWS Austin/San Antonio, TX

Area

Whole counties

County Lee County, TX

000 
TTAA00 KHOU 180429
FFWSAT
TXC285-287-180820-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
ISSUED BY NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1127 PM CDT SAT OCT 17 1998

THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  LEE COUNTY IN SOUTH CENTRAL TEXAS
  LAVACA COUNTY IN SOUTH CENTRAL TEXAS

* UNTIL 300 AM CDT

* AT 1120 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR
  INDICATED NUMEROUS SHOWERS AND THUNDERSTORMS MOVING NORTHEAST
  AT 20 MPH ACROSS SOUTH CENTRAL TEXAS.

* AN ADDITIONAL 3 TO 4 INCHES OF RAINFALL IS POSSIBLE ACROSS LAVACA
  AND LEE COUNTIES DURING THE NEXT 4 HOURS AS THUNDERSTORM RE-
  DEVELOPMENT CONTINUES BACK TO THE SOUTHWEST.

IF FLASH FLOODING IS OBSERVED...ACT QUICKLY.  MOVE TO ESCAPE FLOOD
WATERS.  DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS
RISING.

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, 3 hours 7 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.