Alert archive / Texas / Flash Flood Warnings in 1997
Flash Flood Warning 217, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Jun 25, 1997, 7:30 PM CDT for Llano 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
- Jun 25, 1997, 7:30 PM CDT (00:30 UTC)
- Expired
- Jun 25, 1997, 10:30 PM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Llano County, TX
The nearest sounding before it
Del Rio, TX (KDRT), launched 00:00Z, 0.5 hours before the alert went out and 255 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
- 1040 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 1254 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- 14 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 260030 FFWSAT TXC299-260330- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 730 PM CDT WED JUN 25 1997 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 1030 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL TEXAS ...LLANO COUNTY AT 725 PM CDT A LINE OF THUNDERSTORMS EXTENDED FROM ENCHANTED ROCK TO SUNRISE BEACH AND WAS MOVING NORTHWEST AT 15 MPH TOWARDS LLANO. RAINFALL RATES WITH THESE THUNDERSTORMS WERE BETWEEN ONE TO TWO INCHES AN HOUR AND WILL CAUSE RAPID RUNOFF AND BRIEF FLASH FLOODING. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. FLOOD PRONE URBAN AREAS FILL WITH WATER QUICKLY. CLOGGEDX STORM DRAINS MAY CAUSE OTHER AREAS TO FLOOD. DO NOT DRIVE THROUGH FLOOD WATERS AND STAY AWAY FROM STORM DRAINS.
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, Jun 25, 5:15 PM CDT, 2 hours 15 minutes before
TXZ171>173-183>194-202>209-217>225-228-261200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 515 PM CDT WED JUN 25 1997 ...FLASH FLOOD WATCH IN EFFECT TONIGHT FOR SOUTH CENTRAL TEXAS AND HILL COUNTRY... DUE TO THE WARM MOIST UNSTABLE TROPICAL AIR MASS THAT HAS ESTABLISHED ROOTS OVER SOUTH CENTRAL TEXAS AND ADJACENT AREAS, THE POTENTIAL FOR ADDITIONAL RAIN AND FLOODING WILL EXIST TONIGHT AND QUITE LIKELY INTO THURSDAY. THEREFORE, A FLASH FLOOD WATCH REMAINS IN EFFECT TONIGHT FOR SOUTH CENTRAL TEXAS AND THE TEXAS HILL COUNTRY. RIVER FLOOD WARNINGS REMAIN IN EFFECT FOR MANY RIVERS AND CREEKS THROUGHOUT THE HILL COUNTRY, EDWARDS PLATEAU AND SOUTH CENTRAL TEXAS AS THESE WATERWAYS AND THEIR TRIBUTARIES REMAIN NEAR OR ABOVE FLOOD STAGE. SINCE THE GROUND IS SUPER- SATURATED FROM PAST DAYS DELUGES, ANY ADDITIONAL RAINFALL FROM SCATTERED MAINLY AFTERNOON AND EVENING SHOWERS OR THUNDERSTORMS WILL NOT SOAK IN BUT RUN OFF RAPIDLY AND COMPOUND THE FLASH FLOOD THREAT THAT ALREADY EXISTS. MOST OF THE SHOWER AND THUNDERSTORM ACTIVITY WILL DEVELOP DURING THE AFTERNOON AND BEGIN TO DIMINISH AFTER DARK. IN THE MEANTIME, RAINFALL TOTALS EXCEEDING AN INCH ARE POSSIBLE IN SOME OF THE HEAVIER STORMS. 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.
Special weather statement, Jun 25, 5:22 PM CDT, 2 hours 8 minutes before
TXZ171>173-183>194-202>209-217>225-228-261200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 515 PM CDT WED JUN 25 1997 ...FLASH FLOOD WATCH IN EFFECT TONIGHT FOR SOUTH CENTRAL TEXAS AND HILL COUNTRY... DUE TO THE WARM MOIST UNSTABLE TROPICAL AIR MASS THAT HAS ESTABLISHED ROOTS OVER SOUTH CENTRAL TEXAS AND ADJACENT AREAS, THE POTENTIAL FOR ADDITIONAL RAIN AND FLOODING WILL EXIST TONIGHT AND QUITE LIKELY INTO THURSDAY. THEREFORE, A FLASH FLOOD WATCH REMAINS IN EFFECT TONIGHT FOR SOUTH CENTRAL TEXAS AND THE TEXAS HILL COUNTRY. RIVER FLOOD WARNINGS REMAIN IN EFFECT FOR MANY RIVERS AND CREEKS THROUGHOUT THE HILL COUNTRY, EDWARDS PLATEAU AND SOUTH CENTRAL TEXAS AS THESE WATERWAYS AND THEIR TRIBUTARIES REMAIN NEAR OR ABOVE FLOOD STAGE. SINCE THE GROUND IS SUPER- SATURATED FROM PAST DAYS DELUGES, ANY ADDITIONAL RAINFALL FROM SCATTERED MAINLY AFTERNOON AND EVENING SHOWERS OR THUNDERSTORMS WILL NOT SOAK IN BUT RUN OFF RAPIDLY AND COMPOUND THE FLASH FLOOD THREAT THAT ALREADY EXISTS. MOST OF THE SHOWER AND THUNDERSTORM ACTIVITY WILL DEVELOP DURING THE AFTERNOON AND BEGIN TO DIMINISH AFTER DARK. IN THE MEANTIME, RAINFALL TOTALS EXCEEDING AN INCH ARE POSSIBLE IN SOME OF THE HEAVIER STORMS. 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 O`NLY IF UNEXPECTED HAZARDOUS WEATHER DEVELOPS OR IF EXPECTED HAZARDOUS WEATHER NO LONGER IS FORECAST TO DEVELOP.
Nearby
Flash Flood Warnings in Texas, 1997Every flash flood warning in 1997
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.