Alert archive / Texas / Flash Flood Warnings in 1998
Flash Flood Warning 170, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Oct 17, 1998, 10:41 AM CDT for Bastrop County, Caldwell County, Guadalupe County, Texas. It was in force for 6 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, 10:41 AM CDT (15:41 UTC)
- Expired
- Oct 17, 1998, 4:40 PM CDT
- In force
- 6 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
Counties Bastrop County, TX, Caldwell County, TX, Guadalupe County, TX
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 3.7 hours before the alert went out and 236 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
- 2241 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 529 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 135 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 4.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSAT 171543 FFWSAT TXC021-055-187-172140- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1041 AM CDT SAT OCT 17 1998 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A * FLASH FLOOD WARNING FOR... BASTROP IN TEXAS CALDWELL IN TEXAS GUADALUPE IN TEXAS * UNTIL 440 PM CDT * AT 10:30 AM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED NUMEROUS THUNDERSTORMS WITH VERY HEAVY RAIN FROM SAN ANTONIO NORTHWARD ALONG THE I35 CORRIDOR... MOVING EAST-NORTHEAST 10 MPH. RAINFALL RATES OF 2 TO 3 INCHES PER HOUR ARE INDICATED IN THESE THUNDERSTORMS. TOTALS THIS MORNING AND EARLY AFTERNOON BETWEEN 5 AND 10 INCHES COULD OCCUR...CREATING EXTREMELY DANGEROUS FLASH FLOOD CONDITIONS. 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 TODAY FOR CENTRAL AND SOUTH CENTRAL TEXAS...AND THE TEXAS HILL COUNTRY. STAY TUNED TO LOCAL RADIO AND TV STATIONS...THE WEATHER CHANNEL... LOCAL CABLE TV STATIONS...OR NOAA WEATHER RADIO. THIS IS AN EXTREMELY DANGEROUS HEAVY RAIN AND FLOOD SITUATION...TRAVEL IS DISCOURAGED.
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 16, 7:25 PM CDT, 15 hours 16 minutes earlier.
Area forecast discussion, Oct 16, 7:25 PM CDT, 15 hours 16 minutes before
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
In the hours before
Special weather statement, Oct 17, 5:45 AM CDT, 4 hours 56 minutes before
TXZ171>173-183>194-202>209-217>225-228-172300- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 545 AM CDT SAT OCT 17 1998 A FLASH FLOOD WATCH IS IN EFFECT TODAY THROUGH SUNDAY FOR THE TEXAS HILL COUNTRY AND ALL OF SOUTH CENTRAL TEXAS. A SERIES OF WEAK UPPER LEVEL DISTURBANCES AND SLOW MOVING COLD FRONT WILL INTERACT WITH A VERY MOIST AND UNSTABLE AIRMASS AND PRODUCE WIDESPREAD SHOWERS AND THUNDERSTORMS ACROSS THE TEXAS HILL COUNTRY AND SOUTH CENTRAL TEXAS. WIDESPREAD RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE EXPECTED WITH ISOLATED AMOUNTS OF 4 TO 6 INCHES POSSIBLE. 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/6GALVESTON SATSPSHOU...WWUS35 KHOU COASTAL BEND/ FROM CORPUS CHRISTI SATSPSCRP...WWUS35 KCRP RIO GRANDE PLAINS
Special weather statement, Oct 17, 5:45 AM CDT, 4 hours 56 minutes before
TXZ171>173-183>194-202>209-217>225-228-172300- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 545 AM CDT SAT OCT 17 1998 A FLASH FLOOD WATCH IS IN EFFECT TODAY THROUGH SUNDAY FOR THE TEXAS HILL COUNTRY AND ALL OF SOUTH CENTRAL TEXAS. A SERIES OF WEAK UPPER LEVEL DISTURBANCES AND SLOW MOVING COLD FRONT WILL INTERACT WITH A VERY MOIST AND UNSTABLE AIRMASS AND PRODUCE WIDESPREAD SHOWERS AND THUNDERSTORMS ACROSS THE TEXAS HILL COUNTRY AND SOUTH CENTRAL TEXAS. WIDESPREAD RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE EXPECTED WITH ISOLATED AMOUNTS OF 4 TO 6 INCHES POSSIBLE. 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/6GALVESTON 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, 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 | Blanco, Comal, Hays, Travis | 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.