Alert archive / Texas / Flash Flood Warnings in 1998
Flash Flood Warning 56, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Aug 18, 1998, 10:42 AM CDT for Uvalde County, Zavala 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
- Aug 18, 1998, 10:42 AM CDT (15:42 UTC)
- Expired
- Aug 18, 1998, 1:40 PM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
Counties Uvalde County, TX, Zavala County, TX
The nearest sounding before it
Del Rio, TX (KDRT), launched 12:00Z, 3.7 hours before the alert went out and 109 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.
- Mixed-layer CAPE
- 646 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 570 m above ground
- 0-6 km bulk shear
- 1 kt
- 0-1 km storm-relative helicity
- -69 m²/s²
- 0-3 km storm-relative helicity
- -16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSAT 181542 FFWSAT TXC463-507-181840- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1042 AM CDT TUE AUG 18 1998 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A * FLASH FLOOD WARNING FOR... UVALDE COUNTY IN SOUTH CENTRAL TEXAS ZAVALA COUNTY IN SOUTH CENTRAL TEXAS * UNTIL 140 PM CDT * AT 1040 AM RADAR INDICATED HEAVY RAINS DEVELOPING ACROSS NORTHERN ZAVALA AND WESTERN UVALDE COUNTIES. RAINFALL RATES OF UP TO 2 AND A HALF INCHES PER HOUR HAVE BEEN OBSERVED DURING THE PAST HOUR OVER THESE AREAS. * IF YOU ARE IN THESE AREAS... MOVE TO HIGHER GROUND. DO NOT DRIVE THROUGH WATER COVERING THE ROAD. SECONDARY ROADS...LOW BRIDGES AND CROSSINGS WILL FLOOD OVER MUCH OF NORTHERN ZAVALA AND WESTERN UVALDE COUNTIES THE NEXT FEW HOURS. EIGHTY PER CENT OF FLOOD FATALITIES INVOLVE AUTO DROWNINGS. MOTORISTS SHOULD ABSOLUTELY NOT ENTER FLOODED LOW WATER CROSSINGS.
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Aug 18, 4:45 AM CDT, 5 hours 57 minutes before
TXZ171>173-183>194-202>209-217>225-228-182230- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 445 AM CDT TUE AUG 18 1998 ...SHOWERS AND THUNDERSTORMS WITH LOCALLY HEAVY RAIN POSSIBLE OVER SOUTH CENTRAL TEXAS AND THE HILL COUNTRY TODAY... SCATTERED SHOWERS AND THUNDERSTORMS ARE STILL POSSIBLE TODAY AND THIS EVENING OVER SOUTH CENTRAL TEXAS AND THE HILL COUNTRY. SOME OF THE STRONGER SHOWERS AND THUNDERSTORMS COULD CAUSE LOCALLY HEAVY HEAVY RAINFALL AND POSSIBLE FLASH FLOODING. IF HEAVY RAIN DOES DEVELOP...ITS RUNOFF COULD CAUSE FLOODING AT LOW WATER CROSSINGS AND OTHER LOW LYING AREAS...PLUS DRAINAGE DITCHHES. THESE AREAS SHOULD ALWAYS BE AVOIDED IN HEAVY RAIN EVENTS. AN AREA OF LOW PRESSURE ALOFT LINGERS WEST OF THE RIO GRANDE... WITH MODERATE INSTABILITY AND HIGH AMOUNTS OF MOISTURE OVER THE AREA. THE PATTERN SUPPORTS A GOOD CHANCE OF RAIN FOR THE AREA TODAY...POSSIBLY EXTENDING INTO THE EVENING HOURS. EARLY THIS MORNING...WIDELY SCATTERED SHOWERS STRETCHED FROM NORTHEAST OF DEL RIO TO EAST OF EAGLE PASS. CONDITIONS REMAIN FAVORABLE FOR SHOWERS AND THUNDERSTORMS TODAY. LOCALLY HEAVY RAIN IS POSSIBLE. IF AREAS OF HEAVY RAIN SHOW TRENDS OF INCREASING IN AREAL COVERAGE AND FOCUSING IN AN AREA...THEN A FLASH FLOOD WATCH MAY HAVE TO BE ISSUED. ADDITIONAL STATEMENTS WILL BE ISSUED IF CONDITIONS WARRANT. RAINFALL AMOUNTS FROM SCATTERED SHOWERS AND THUNDERSTORMS THROUGH TONIGHT WILL AVERAGE ONE QUARTER TO THREE QUARTER OF AN INCH... WITH AMOUNTS OF TWO TO FOUR INCHES IN THE STRONGER SHOWERS AND THUNDERSTORMS POSSIBLE. THE HAZARDOUS WEATHER OUTLOOK NORMALLY WILL BE UPDATED BY MEANS OF THE ZONE FORECASTS...SHORT TERM FORECAST...WATCHES...WARNINGS AND ADVISORIES. THE HAZARDOUS WEATHER OUTLOOK ITSELF WILL BE UPDATED ONLY IF UNEXPECTED HAZARDOUS WEATHER DEVELOPS OR IF EXPECTED HAZARDOUS WEATHER NO LONGER IS FORECAST TO DEVELOP. ADDITIONAL WEATHER INFORMATION IS AVAILABLE ON THE NATIONAL WEATHER SERVICE CENTRAL AND SOUTH CENTRAL TEXAS HOME PAGE OF THE INTERNET WORLD WIDE WEB AT WWW.SRH.NOAA.GOV/EWX OR TUNE TO THE VOICE OF THE NATIONAL WEATHER SERVICE...NOAA WEATHER RADIO...OPERATING ON A FREQUENCY BETWEEN 162.400 MHZ AND 162.550 MHZ. NEARBY HAZARDOUS WEATHER OUTLOOKS INCLUDE: SOUTHWEST TEXAS FROM MIDLAND LBBSPSMAF...WWUS35 KMAF CONCHO VALLEY FROM SAN ANGELO LBBSPSSJT...WWUS35 KSJT NORTH TEXAS FROM FORT WORTH FTWSPSFTW...WWUS35 KFTW SOUTHEAST TEXAS FROM HOUSTON/GALVESTON SATSPSHOU...WWUS35 KHOU COASTAL BEND/ FROM CORPUS CHRISTI SATSPSCRP...WWUS35 KCRP RIO GRANDE PLAINS
Special weather statement, Aug 18, 4:45 AM CDT, 5 hours 57 minutes before
TXZ171>173-183>194-202>209-217>225-228-182230- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 445 AM CDT TUE AUG 18 1998 ...SHOWERS AND THUNDERSTORMS WITH LOCALLY HEAVY RAIN POSSIBLE OVER SOUTH CENTRAL TEXAS AND THE HILL COUNTRY TODAY... SCATTERED SHOWERS AND THUNDERSTORMS ARE STILL POSSIBLE TODAY AND THIS EVENING OVER SOUTH CENTRAL TEXAS AND THE HILL COUNTRY. SOME OF THE STRONGER SHOWERS AND THUNDERSTORMS COULD CAUSE LOCALLY HEAVY HEAVY RAINFALL AND POSSIBLE FLASH FLOODING. IF HEAVY RAIN DOES DEVELOP...ITS RUNOFF COULD CAUSE FLOODING AT LOW WATER CROSSINGS AND OTHER LOW LYING AREAS...PLUS DRAINAGE DITCHHES. THESE AREAS SHOULD ALWAYS BE AVOIDED IN HEAVY RAIN EVENTS. AN AREA OF LOW PRESSURE ALOFT LINGERS WEST OF THE RIO GRANDE... WITH MODERATE INSTABILITY AND HIGH AMOUNTS OF MOISTURE OVER THE AREA. THE PATTERN SUPPORTS A GOOD CHANCE OF RAIN FOR THE AREA TODAY...POSSIBLY EXTENDING INTO THE EVENING HOURS. EARLY THIS MORNING...WIDELY SCATTERED SHOWERS STRETCHED FROM NORTHEAST OF DEL RIO TO EAST OF EAGLE PASS. CONDITIONS REMAIN FAVORABLE FOR SHOWERS AND THUNDERSTORMS TODAY. LOCALLY HEAVY RAIN IS POSSIBLE. IF AREAS OF HEAVY RAIN SHOW TRENDS OF INCREASING IN AREAL COVERAGE AND FOCUSING IN AN AREA...THEN A FLASH FLOOD WATCH MAY HAVE TO BE ISSUED. ADDITIONAL STATEMENTS WILL BE ISSUED IF CONDITIONS WARRANT. RAINFALL AMOUNTS FROM SCATTERED SHOWERS AND THUNDERSTORMS THROUGH TONIGHT WILL AVERAGE ONE QUARTER TO THREE QUARTER OF AN INCH... WITH AMOUNTS OF TWO TO FOUR INCHES IN THE STRONGER SHOWERS AND THUNDERSTORMS POSSIBLE. THE HAZARDOUS WEATHER OUTLOOK NORMALLY WILL BE UPDATED BY MEANS OF THE ZONE FORECASTS...SHORT TERM FORECAST...WATCHES...WARNINGS AND ADVISORIES. THE HAZARDOUS WEATHER OUTLOOK ITSELF WILL BE UPDATED ONLY IF UNEXPECTED HAZARDOUS WEATHER DEVELOPS OR IF EXPECTED HAZARDOUS WEATHER NO LONGER IS FORECAST TO DEVELOP. ADDITIONAL WEATHER INFORMATION IS AVAILABLE ON THE NATIONAL WEATHER SERVICE CENTRAL AND SOUTH CENTRAL TEXAS HOME PAGE OF THE INTERNET WORLD WIDE WEB AT WWW.SRH.NOAA.GOV/EWX OR TUNE TO THE VOICE OF THE NATIONAL WEATHER SERVICE...NOAA WEATHER RADIO...OPERATING ON A FREQUENCY BETWEEN 162.400 MHZ AND 162.550 MHZ. NEARBY HAZARDOUS WEATHER OUTLOOKS INCLUDE: SOUTHWEST TEXAS FROM MIDLAND LBBSPSMAF...WWUS35 KMAF CONCHO VALLEY FROM SAN ANGELO LBBSPSSJT...WWUS35 KSJT NORTH TEXAS FROM FORT WORTH FTWSPSFTW...WWUS35 KFTW SOUTHEAST TEXAS FROM HOUSTON/GALVESTON SATSPSHOU...WWUS35 KHOU COASTAL BEND/ FROM CORPUS CHRISTI SATSPSCRP...WWUS35 KCRP RIO GRANDE PLAINS
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 6:44 AM CDT | Flash Flood Warning | EWX | Kinney, Maverick | 2 hr |
| Aug 18, 1:05 PM CDT | Flash Flood Warning | EWX | Kinney | 4 hr |
| Aug 18, 1:37 PM CDT | Flash Flood Warning | EWX | Uvalde, Zavala | 4 hr |
| Aug 18, 4:59 PM CDT | Flash Flood Warning | EWX | Kinney | 3 hr |
| Aug 18, 5:19 PM CDT | Flash Flood Warning | EWX | Uvalde, Zavala | 3 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.