Alert archive / Texas / Flash Flood Warnings in 1987
Flash Flood Warning 97, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Nov 25, 1987, 2:08 AM CST for Hays County, Texas. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Nov 25, 1987, 2:08 AM CST (08:08 UTC)
- Expired
- Nov 25, 1987, 5:15 AM CST
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Hays County, TX
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Victoria Regiona, TX (KVCT), launched 00:00Z, 8.1 hours before the alert went out and 173 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
- 1109 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 693 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 153 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 3.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KAUS 250808 FFWAUS TXC209-251115- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AUSTIN TX 208 AM CST WED NOV 25 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 515 AM CST FOR PEOPLE IN THE FOLLOWING COUNTY OF TEXAS...HAYS PUBLIC REPORTS OF FOUR TO FIVE INCHES OF RAINFALL IN THE WIMBERLY HAVE BEEN REPORTED. AUSTIN RADAR WAS BEEN INDICATING INTENSE THUNDERSTORMS THROUGHOUT HAYS COUNTY FOR THE PAST FEW HOURS SHOWING LITTLE MOVEMENT. DONT LET CHILDREN PLAY IN WATERWAYS SUBJECT TO RAPID RISING OR SWIFT MOVING WATER. THIS IS A DANGEROUS SITUATION. TAKE APPROPRIATE ACTION. REMEMBER THAT DEATHS DURING FLASH FLOODING ARE OFTEN RELATED TO MOTORISTS DRIVING THROUGH 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, Nov 24, 9:54 PM CST, 4 hours 14 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 950 PM CST TUE NOV 24 1987 ...SHOWERS AND THUNDERSHOWERS CONTINUE SOUTH CENTRAL TEXAS... AT 935 PM CST...THE HONDO WEATHER RADAR INDICATED SCATTERED SHOWERS AND THUNDERSHOWERS FROM THE SAN ANTONIO AREA...TO SEGUIN...TO JUST SOUTHWEST OF AUSTIN. THE STRONGEST THUNDERSHOWERS WERE NEAR NEW BRAUNFELS AND EAST OF BLANCO. MOVEMENT WAS TO THE NORTH NORTHEAST AT 15 MPH. VERY MOIST AIR...AND A WEAK UPPER LEVEL DISTURBANCE ARE COMBINING TO PRODUCE THE THUNDERSHOWERS THIS EVENING. IN ADDITION...A NEARLY STALLED COLD FRONT WAS IN WEST TEXAS NEAR SAN ANGELO...AND MOVING VERY SLOWLY TO THE SOUTHEAST. THE WEATHER OFFICE IN SAN ANTONIO HAD RECORDED ABOUT ONE THIRD OF AN INCH UP TO 930 PM...BUT OTHER AREAS IN NORTHEAST SAN ANTONIO MAY HAVE RECEIVED HEAVIER AMOUNTS. THUNDERSHOWERS WILL CONTINUE TO DEVELOP TONIGHT AND THROUGH WEDNESDAY. MINOR FLOODING OF SOME STREETS AND LOW LY,ING AREAS IS POSSIBLE LATER TONIGHT AND TOWARD MORNING. STAY TUNED TO NOAA WEATHER RADIO...OR YOUR LOCAL RADIO OR TV STATION FOR LATER DEVELOPMENTS.
Special weather statement, Nov 25, 1:32 AM CST, 36 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 130 AM CST WED NOV 24 1987 ...SHOWERS AND THUNDERSHOWERS CONTINUE SOUTH CENTRAL TEXAS... AT 120 AM CST...NATIONAL WEATHER SERVICE RADAR AT HONDO SHOWED MOSTLY LIGHT SHOWERS AND A FEW THUNDERSHOWERS ACROSS MUCH OF SOUTH TEXAS. ALL THIS ACTIVITY WAS MOVING SLOWLY TOWARD THE NORTH. A COMBINATION OF VERY MOIST AIR AND AN UPPER LEVEL LOW PRESSURE SYSTEM ACROSS REGION BROUGHT THIS LATEST ROUND OF PRECIPITATION TO SOUTH TEXAS. THESE CONDITIONS ARE LIKELY TO PERSIST TODAY AND TONIGHT AND TAPER OFF THURSDAY. THE WEATHER SERVICE OFFICE IN SAN ANTONIO HAD RECORDED 0.40 INCHES OF RAINFALL FOR THE PERIOD FROM 5 PM YESTERDAY THROUGH 1 AM TODAY. ALTHOUGH NO HEAVY RAINS AND FLOODING ARE ANTICIPATED AT THIS TIME MOTORISTS ARE URGED TO SLOW DOWN ON RAIN SLICKENED STREETS AND BE ALERT FOR MINOR FLOODING OF SOME LOW LYING AREAS. PLEASE STAY TUNED TO YOUR TV...RADIO...OR NOAA WEATHER RADIO FOR LATER DEVELOPMENTS AND STATEMENTS.
Special weather statement, Nov 25, 1:36 AM CST, 32 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 140 AM CST WED NOV 25 1987 ...SHOWERS AND THUNDERSHOWERS CONTINUE SOUTH CENTRAL TEXAS... AT 120 AM CST...NATIONAL WEATHER SERVICE RADAR AT HONDO SHOWED MOSTLY LIGHT SHOWERS AND A FEW THUNDERSHOWERS ACROSS MUCH OF SOUTH TEXAS. ALL THIS ACTIVITY WAS MOVING SLOWLY TOWARD THE NORTH. A COMBINATION OF VERY MOIST AIR AND AN UPPER LEVEL LOW PRESSURE SYSTEM ACROSS REGION BROUGHT THIS LATEST ROUND OF PRECIPITATION TO SOUTH TEXAS. THESE CONDITIONS ARE LIKELY TO PERSIST TODAY AND TONIGHT AND TAPER OFF THURSDAY. THE WEATHER SERVICE OFFICE IN SAN ANTONIO HAD RECORDED 0.40 INCHES OF RAINFALL FOR THE PERIOD FROM 5 PM YESTERDAY THROUGH 1 AM TODAY. ALTHOUGH NO HEAVY RAINS AND FLOODING ARE ANTICIPATED AT THIS TIME MOTORISTS ARE URGED TO SLOW DOWN ON RAIN SLICKENED STREETS AND BE ALERT FOR MINOR FLOODING OF SOME LOW LYING AREAS. PLEASE STAY TUNED TO YOUR TV...RADIO...OR NOAA WEATHER RADIO FOR LATER DEVELOPMENTS AND STATEMENTS.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 24, 11:41 PM CST | Severe Thunderstorm Warning | EWX | Travis, Williamson | 64 min |
| Nov 25, 12:42 AM CST | Severe Thunderstorm Warning | EWX | Williamson | 63 min |
Nearby
Flash Flood Warnings in Texas, 1987Every flash flood warning in 1987
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.