Alert archive / Texas / Flash Flood Warnings in 1998
Flash Flood Warning 178, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Oct 17, 1998, 6:31 PM CDT for 4 counties in Texas. It was in force for 5 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, 6:31 PM CDT (23:31 UTC)
- Expired
- Oct 17, 1998, 11:30 PM CDT
- In force
- 5 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
Counties Blanco County, TX, Comal County, TX, Hays County, TX, Travis County, TX
The nearest sounding before it
Del Rio, TX (KDRT), launched 12:00Z, 11.5 hours before the alert went out and 275 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
- 502 J/kg
- Mixed-layer CIN
- -115 J/kg
- Mixed-layer LCL
- 645 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 130 m²/s²
- 0-3 km storm-relative helicity
- 163 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 2.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSAT 172332 FFWSAT TXC029-031-053-091-209-259-453-491-180430- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 631 PM CDT SAT OCT 17 1998 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 * UNTIL 1130 PM CDT * AT 620 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM WITH VERY HEAVY RAIN REDEVELOPING FROM HONDO TO BOERNE TO CANYON LAKE TO BLANCO TO BURNET... MOVING NORTHEAST AT NEAR 15 MPH. * REDEVELOPING SCATTERED SHOWERS AND THUNDERSTORMS FROM WEST OF SAN ANTONIO TO BOERNE TO BLANCO AND BURNET. ADDITIONAL HEAVY RAINS OF ONE TO TWO INCHES PER HOUR ON ALREADY SATURATED AND FLOODED GROUND. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGER OF FLOODING. 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.
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.
NWS Austin/San Antonio, TX wrote its last area forecast discussion before this flash flood warning went out at Oct 17, 2:45 PM CDT, 3 hours 46 minutes earlier.
Area forecast discussion, Oct 17, 2:45 PM CDT, 3 hours 46 minutes before
COASTAL BEND FORECAST DISCUSSION NATIONAL WEATHER SERVICE CORPUS CHRISTI TX 245 PM CDT SAT OCT 17 1998 THE BIG TIME CONVECTION DEVELOPED NORTH OF CWA IN RRQ OF JET THAT ALSO IS BEING FEED TROPICAL MOISTURE FROM EASTERN PAC TROPICAL SYSTEM. MOST OF CWA HAS BEEN IN AREA OF WEAK ISENT LIFT AND MOISTURE CONVERGENCE THAT IS SETTING OFF WIDELY SCATTERED SHRA/TSRA. IT LOOKS LIKE THE FRONT WILL ONLY MOVE TO JUST NORTH OF CWA AS SHORT WAVE RIDGE DEVELOPS OVER WESTERN TX AHEAD SHORT WAVE TROF MOVING INTO BAJA. LOOKS LIKE FRONT WILL MOVE THROUGH LATE MONDAY OR MONDAY NIGHT. THIS LEAVES CWA IN INTERESTING SITUATION...WITH PLENTY OF MOISTURE...THE FRONT...HIGH THETA-E AIR...ISENT LIFT...HOWEVER AT LEAST THOUGH SUNDAY THE BEST OF ALL OF THE ABOVE REMAIN OVER HILL COUNTRY AND IN FAR WESTERN CWA. WILL HOLD ON ANY FFA FOR NOW AND SEE HOW THE ATMOSPHERE READJUSTS AFTER THE CONVECTION TO NORTH. MY FEELING NOW IS THE NORTHERN TIER OF COUNTIES MIGHT NEED AN FFA IF THINGS REDEVELOP OVER HILL COUNTRY AND SPREAD SOUTH TONIGHT. WITH ALL OF THIS SAID...MY MODEL OF CHOICE CONTINUES TO BE THE AVN BUT WILL BLEND IN SOME ISENT DATA FROM ETA EVEN THOUGH WE HAVE SOME DIABATIC AFFECTS GOING ON. WILL KEEP SKIES MOCLD THROUGH PERIOD AND WILL TREND TEMPS AND POPS TOWARDS FAN GUIDANCE. HOWEVER FAN MAY BE A BIT TOO LOW FOR MINS AND WILL BUMP THOSE UP. CRP TW 073/081 071/079 066 5644 NGP 076/082 074/080 067 5644 ALI 073/082 072B/080 066 5644 VCT TW 072/081 069/080 067 5644 LRD TW 072/080 068/080 067 5754 78
In the hours before
Special weather statement, Oct 17, 5:00 PM CDT, 1 hour 31 minutes before
TXZ171>173-183>194-202>209-217>225-228-181100- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 500 PM CDT SAT OCT 17 1998 A FLOOD AND FLASH FLOOD WATCH IS IN EFFECT TONIGHT THROUGH SUNDAY FOR THE TEXAS HILL COUNTRY AND ALL OF SOUTH CENTRAL TEXAS. A SERIES OF UPPER LEVEL DISTURBANCES...MOISTURE FROM EASTERN PACIFIC TROPICAL SYSTEMS...GULF MOISTURE...AND A SLOW MOVING COLD FRONT WILL INTERACT TO PRODUCE WIDESPREAD SHOWERS AND THUNDERSTORMS ACROSS THE HILL COUNTRY AND SOUTH CENTRAL TEXAS THROUGH SUNDAY. ADDITIONAL RAINFALL AMOUNTS OF UP TO 5 INCHES CAN BE EXPECTED. PERSONS IN OR NEAR THE WATCH AREA ARE URGED TO CHECK PREPAREDNESS REQUIREMENTS...KEEP INFORMED AND BE READY TO TAKE ACTION IF HEAVY RAIN OR FLOODING IS OBSERVED OR A WARNING IS ISSUED. MOTORISTS SHOULD NOT ATTEMPT TO DRIVE THROUGH FLOODED OR LOW LYING AREAS WHERE WATER IS FLOWING OR OF AN UNKNOWN DEPTH. KEEP CHILDREN AWAY FROM STORM DRAINS AND STREAMS. 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. TIMELY DELIVERY OF DATA AND PRODUCTS FROM THIS SERVER THROUGH THE INTERNET IS NOT GUARANTEED... UNLIKE DATA AND PRODUCTS DELIVERED FROM THE OFFICIAL NATIONAL WEATHER SERVICE SOURCES. THE OFFICIAL SOURCE OF NATIONAL WEATHER SERVICE DATA AND PRODUCTS IS THE NOAA WEATHER RADIO...NOAA WEATHER WIRE...FAMILY OF SERVICES AND EMWIN. 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, Oct 17, 5:00 PM CDT, 1 hour 31 minutes before
TXZ171>173-183>194-202>209-217>225-228-181100- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 500 PM CDT SAT OCT 17 1998 A FLOOD AND FLASH FLOOD WATCH IS IN EFFECT TONIGHT THROUGH SUNDAY FOR THE TEXAS HILL COUNTRY AND ALL OF SOUTH CENTRAL TEXAS. A SERIES OF UPPER LEVEL DISTURBANCES...MOISTURE FROM EASTERN PACIFIC TROPICAL SYSTEMS...GULF MOISTURE...AND A SLOW MOVING COLD FRONT WILL INTERACT TO PRODUCE WIDESPREAD SHOWERS AND THUNDERSTORMS ACROSS THE HILL COUNTRY AND SOUTH CENTRAL TEXAS THROUGH SUNDAY. ADDITIONAL RAINFALL AMOUNTS OF UP TO 5 INCHES CAN BE EXPECTED. PERSONS IN OR NEAR THE WATCH AREA ARE URGED TO CHECK PREPAREDNESS REQUIREMENTS...KEEP INFORMED AND BE READY TO TAKE ACTION IF HEAVY RAIN OR FLOODING IS OBSERVED OR A WARNING IS ISSUED. MOTORISTS SHOULD NOT ATTEMPT TO DRIVE THROUGH FLOODED OR LOW LYING AREAS WHERE WATER IS FLOWING OR OF AN UNKNOWN DEPTH. KEEP CHILDREN AWAY FROM STORM DRAINS AND STREAMS. 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. TIMELY DELIVERY OF DATA AND PRODUCTS FROM THIS SERVER THROUGH THE INTERNET IS NOT GUARANTEED... UNLIKE DATA AND PRODUCTS DELIVERED FROM THE OFFICIAL NATIONAL WEATHER SERVICE SOURCES. THE OFFICIAL SOURCE OF NATIONAL WEATHER SERVICE DATA AND PRODUCTS IS THE NOAA WEATHER RADIO...NOAA WEATHER WIRE...FAMILY OF SERVICES AND EMWIN. 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 |
|---|---|---|---|---|
| Oct 17, 6:28 AM CDT | Flash Flood Warning | EWX | Bexar, Blanco, Comal | 3 hr |
| Oct 17, 8:08 AM CDT | Flash Flood Warning | EWX | Atascosa, Frio, Medina | 2 hr |
| Oct 17, 8:27 AM CDT | Flash Flood Warning | EWX | Bexar, Comal, Hays | 4 hr |
| Oct 17, 8:27 AM CDT | Flash Flood Warning | EWX | Travis, Williamson | 4 hr |
| Oct 17, 10:41 AM CDT | Flash Flood Warning | EWX | Bastrop, Caldwell, Guadalupe | 6 hr |
| Oct 17, 12:19 PM CDT | Flash Flood Warning | EWX | Burnet, Travis, Williamson | 6 hr |
| Oct 17, 12:19 PM CDT | Flash Flood Warning | EWX | Bexar, Blanco, Comal, Hays, Kendall | 6 hr |
| Oct 17, 12:37 PM CDT | Tornado Warning | EWX | Caldwell | 63 min |
| Oct 17, 1:15 PM CDT | Tornado Warning | EWX | Bastrop, Lee | 60 min |
| Oct 17, 4:29 PM CDT | Flash Flood Warning | EWX | Caldwell, Guadalupe | 6 hr |
| Oct 17, 4:29 PM CDT | Flash Flood Warning | EWX | Bastrop | 6 hr |
| Oct 17, 4:45 PM CDT | Flash Flood Warning | EWX | Fayette, Gonzales | 6 hr |
| Oct 17, 5:57 PM CDT | Flash Flood Warning | EWX | Lavaca | 6 hr |
| Oct 17, 6:22 PM CDT | Flash Flood Warning | EWX | Lee | 5 hr |
| Oct 17, 6:31 PM CDT | Flash Flood Warning | EWX | Burnet, Williamson | 5 hr |
| Oct 17, 6:31 PM CDT | Flash Flood Warning | EWX | Bexar, Kendall | 5 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.