Alert archive / Texas / Flash Flood Warnings in 1987
Flash Flood Warning 16, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at May 29, 1987, 4:39 AM CDT for Blanco County, Texas. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- May 29, 1987, 4:39 AM CDT (09:39 UTC)
- Expired
- May 29, 1987, 8:45 AM CDT
- In force
- 4 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Blanco 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, 9.7 hours before the alert went out and 214 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
- 2949 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 817 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 5.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KAUS 290939
FFWAUS
TXC021-031-055-209-287-453-491-291345-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN TX
439 AM CDT FRI MAY 29 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 845 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN SOUTH CENTRAL TEXAS
...BASTROP...BLANCO...CALDWELL
...HAYS...LEE
THE FLASH FLOOD WARNINGS FOR TRAVIS AND WILLIAMSON COUNTIES HAVE ALSO
BEEN EXTENDED TO 845 AM CDT...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY. MOVE TO HIGHER GROUND.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT. IT'S
IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR
CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS SHOULD
AVOID CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS.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, May 28, 11:22 PM CDT, 5 hours 17 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 1117 PM CDT THU MAY 28 1987 ...TORNADO WATCH IS IN EFFECT UNTIL 100 AM CDT FOR VAL VERDE COUNTY INCLUDING THE CITY OF DEL RIO... AT 1112 PM CDT RADAR INDICATED AN AREA THUNDERSTORMS IN THE SOUTHERN HALF OF VAL VERDE COUNTY MOVING TO THE EAST AT AROUND 10 MPH. AN INTENSE STORM WAS LOCATED 20 MILES W OF DEL RIO INSIDE MEXICO MOVING SLOWLY NORTHEAST. HEAVY RAIN HAS FALLEN IN SOME PARTS OF SOUTH VAL VERDE COUNTY AND LOW WATER CROSSINGS AND LOW LYING AREAS EITHER HAVE FLOODED OR COULD FLOOD WITH ANOTHER STRONG DOWNPOUR. THE POTENTIAL FOR SEVERE THUNDERSTORMS EXISTS WITH THE UNSTABLE ATMOSPHERE AND MOIST SOUTHEAST FLOW. REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSEIBLE WARNINGS.
Special weather statement, May 29, 12:28 AM CDT, 4 hours 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 1228 AM CDT FRI MAY 29 1987 AT 1215 AM CDT RADAR INDICATED AN INTENSE THUNDERSTORM ABOUT 20 MILES WEST OF DEL RIO IN MEXICO MOVING EAST AT AROUND 20 MPH. RADAR IS INDICATING HAIL ASSOCIATED WITH THIS STORM. EXCEPT IN THE EXTREME NORTHWEST THUNDERSTORMS CONTINUE TO ROMP TO THE NORTHEAST ACROSS VAL VERDE COUNTY. HEAVY RAIN HAS FALLEN IN SOME PARTS OF SOUTH VAL VERDE COUNTY AND LOW WATE}R CROSSINGS AND LOW LYING AREAS EITHER HAVE FLOODED OR COULD FLOOD WITH ANOTHER STRONG DOWNPOUR. STRONG GUSTY WINDS...DAMAGING HAIL...AND HEAVY RAIN ARE POSSIBLE WITH A THUNDERSTORM AS INTENSE AS THE ONE NOW NEAR DEL RIO.
Special weather statement, May 29, 1:27 AM CDT, 3 hours 12 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 127 AM CDT FRI MAY 29 1987 ...A SEVERE THUNDERSTORM WATCH COVERS ALL OF VAL VERDE COUNTY UNTIL 7 AM CDT... AT 115 AM CDT RADAR INDICATED A VERY STRONG THUNDERSTORM ABOUT 10 MILES WEST OF DEL RIO IN MEXICO MOVING EAST AT AROUND 25 MPH. THUNDERSTORMS ARE NOW SCATTERED OVER ALL OF VAL VERDE COUNTY. A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, May 29, 2:06 AM CDT, 2 hours 33 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 200 AM CDT FRI MAY 19 1987 ...VERY INTENSE THUNDERSTORMS NOW MOVING NORTHWARD AND AWAY FROM AUSTIN... JUST BEFORE 2 AM...RADAR SHOWED A LINE OF VERY INTENSE THUNDERSTORMS... TO EXTEND FROM JUST NORTH OF COLLEGE STATION AND AUSTIN THROUGH KERR- VILLE AND ON INTO THE WESTERN HILL COUNTRY. THE STRONGEST STORMS WERE LOCATED NEAR CAMERON...IN MILAM COUNTY AND OVER WILLIAMSON COUNTY NEAR HUTTO AND LEANDER. THOSE INDIVIDUAL STORMS WERE MOVING TOWARDS THE NORTH NORTHEAST AT 30 MPH. NO SEVERE WEATHER HAS BEEN REPORTED TO OR DETECTED BY THIS OFFICE AT THIS TIME BUT CONDITIONS REMAIN VERY UNSTABLE. CONTINUE THE SEVERE THUNDERSTORM WATCH...WHICH COVERS TRAVIS AND ALL SURROUNDING COUNTIES.
Special weather statement, May 29, 2:38 AM CDT, 2 hours 1 minute before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 138 AM CDT FRI MAY 29 1987 ...A SEVERE THUNDERSTORM WATCH COVERS ALL OF VAL VERDE COUNTY UNTIL 7 AM CDT... AT 125 AM CDT RADAR INDICATED A VERY STRONG THUNDERSTORM ABOUT 10 MILES WEST OF DEL RIO IN MEXICO MOVING EAST AT AROUND 25 MPH. THUNDERSTORMS ARE NOW SCATTERED OVER ALL OF VAL VERDE COUNTY. A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN A0ND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, May 29, 2:58 AM CDT, 1 hour 41 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 300 AM CDT FRI MAY 19 1987 ...VERY INTENSE THUNDERSTORMS AND HEAVY RAINS REMAIN ON THE WEST AND NORTH SIDE OF AUSTIN.... LOCAL RADAR SHOWS VERY STRONG THUNDERSTORMS JUST WEST OF THE CITY...NEAR LAKE TRAVIS AND ALSO IN THE ROUND ROCK/GEORGETOWN AREAS. RAINFALL RATES WERE ESTIMATED AT JUST OVER TWO INCHES PER HOUR IN SEVERAL SMALL SPOTS WITHIN THOSE STORMS. AN UNCONFIRMED REPORT OF OVER THREE INCHES HAS FALLEN OUT AT LAKEWAY. THE THREAT OF FLASH FLOODING MAY BECOME MUCH MORE IMPORTANT DURING THE EARLY MORNING HOURS...EVEN THOUGH THESE STORMS HAVE A HIGH POTENTIAL FOR LARGE HAIL AND HIGH WINDS. CONTINUE THE SEVERE THUNDERSTORM WATCH FOR A LARGE PORTION OF CENTRAL AND SOUTH CENTRAL TEXAS...INCLUDING TRAVIS AND ALL SURROUNDING COUNTIES...UNTIL 7 AM.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 7:05 PM CDT | Tornado Warning | EWX | Val Verde | 70 min |
| May 28, 8:20 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 70 min |
| May 28, 9:13 PM CDT | Severe Thunderstorm Warning | EWX | Kinney | 62 min |
| May 28, 9:55 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 65 min |
| May 28, 10:18 PM CDT | Severe Thunderstorm Warning | EWX | Kinney | 57 min |
| May 28, 11:14 PM CDT | Severe Thunderstorm Warning | EWX | Kinney | 61 min |
| May 29, 12:24 AM CDT | Severe Thunderstorm Warning | EWX | Real, Uvalde | 66 min |
| May 29, 12:24 AM CDT | Severe Thunderstorm Warning | EWX | Kinney | 66 min |
| May 29, 1:35 AM CDT | Severe Thunderstorm Warning | EWX | Bandera, Medina, Uvalde | 55 min |
| May 29, 2:32 AM CDT | Severe Thunderstorm Warning | EWX | Bandera, Medina | 58 min |
| May 29, 2:35 AM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 2 hr |
| May 29, 3:14 AM CDT | Flash Flood Warning | EWX | Travis, Williamson | 2 hr |
| May 29, 3:19 AM CDT | Flash Flood Warning | EWX | Bandera, Kendall, Kerr, Real | 4 hr |
| May 29, 3:19 AM CDT | Flash Flood Warning | EWX | Medina, Uvalde | 4 hr |
| May 29, 3:30 AM CDT | Severe Thunderstorm Warning | EWX | Bandera, Kerr, Real, Uvalde | 60 min |
| May 29, 3:30 AM CDT | Severe Thunderstorm Warning | EWX | Kendall | 60 min |
| May 29, 3:30 AM CDT | Severe Thunderstorm Warning | EWX | Medina | 60 min |
| May 29, 4:39 AM CDT | Flash Flood Warning | EWX | Bastrop, Caldwell, Hays | 4 hr |
| May 29, 4:39 AM CDT | Flash Flood Warning | EWX | Lee | 4 hr |
| May 29, 4:55 AM CDT | Severe Thunderstorm Warning | EWX | Bandera, Medina, Uvalde | 65 min |
| May 29, 4:58 AM CDT | Severe Thunderstorm Warning | EWX | Kinney, Maverick | 62 min |
| May 29, 7:27 AM CDT | Flash Flood Warning | EWX | Bandera, Medina, Uvalde | 4 hr |
| May 29, 11:58 AM CDT | Flash Flood Warning | EWX | Edwards, Kerr, Real | 3 hr |
| May 29, 1:32 PM CDT | Severe Thunderstorm Warning | EWX | Kerr | 58 min |
| May 29, 2:23 PM CDT | Flash Flood Warning | EWX | Edwards, Kerr, Real | 3 hr |
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.