Alert archive / Texas / Flash Flood Warnings in 1986

Flash Flood Warning 36, NWS Austin/San Antonio, TX

June 6, 1986Blanco County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jun 6, 1986, 10:29 PM CDT for Blanco County, Texas. It was in force for 91 min.

The area

The counties it named.

The facts

Issued
Jun 6, 1986, 10:29 PM CDT (03:29 UTC)
Expired
Jun 7, 1986, 12:00 AM CDT
In force
91 min
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, 3.5 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.

Skew-T log-pSkew-T log-p diagram, Victoria Regiona, TX at 00:00Z on 1986-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2162 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Victoria Regiona, TX at 00:00Z on 1986-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2162 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
803 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
46 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KAUS 070329
FFWAUS
TXC031-070500-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN TX
1029 PM CDT FRI JUN 6 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING 
EFFECTIVE UNTIL 1200 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

TEXAS...BLANCO

AT 1020 PM CDT HEAVY THUNDERSTORM WAS MOVE ACROSS THE SOUTHERN AREA
OF BLANCO COUNTY. REPORTS OF 3.50 INCHES OF RAIN HAS OCCURED ON
ROCKY CREEK BETWEEN JOHNSON CITY AND STOMEWALL PRODUCING A FOUR
FOOT RISE ON THE CREEK.

LOW WATER CROSSING ARE LIKELY FLOODED OVER WESTERN AND SOUTHERN
AREAS OF BLANCO COUNTY.

REMEMBER THAT DEATHS DURING FLASH FLOODING ARE OFTEN RELATED TO
MOTORISTS DRIVING THROUGH FLOODED LOW WATER CROSSINGS.

IF THREATENING WEATHER APPROACHES..YOU SHOULD GO TO A SAFE PLACE
IMMEDIATELY AND YOU SHOULD ASK THE NEAREST LAW ENFORCEMENT AGENCY
TO RELAY YOUR SEVERE WEATHER REPORTS TO THE LOCAL NATIONAL WEATHER
SERVICE OFFICE.

PLEASE LISTEN TO YOUR LOCAL RADIO..TV..OR NOAA WEATHER RADIO FOR
LATER STATEMENTS REGARDING THIS HEAVY RAIN EPISODE.

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 6, 6:33 PM CDT, 3 hours 56 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
625 PM CDT FRI JUN 06 1986

...ISOLATED HEAVY THUNDERSTORM OVER PARTS OF THE HILL COUNTRY...

AT 620 PM CDT RADAR INDICATED ISOLATED VERY HEAVY THUNDERSTORMS FROM
NORTH OF FREDERICKSBURG NORTHWEST THROUGH THE MASON AND BRADY AREA TO
SOUTHEAST OF SAN ANGELO. OTHER ISOLATED THUNDERSTORMS WERE LOCATED
NEAR TAYLOR AND NORTH OF COLLEGE STATION WITH ONLY LIGHT RAIN FROM
THE KILLEEN AND LAMPASAS AREA TO NEAR HAMILTON.

THESE THUNDERSTORMS WERE MOVING SOUTHEAST AT NEAR 10 MPH.

FLOODING OF LOW WATER CROSSINGS IS POSSIBLE OVER SOUTHWESTERN LLANO
AND NORTHERN GILLESPIE COUNTIES. THERE IS ALSO THE POSSIBILITY OF
SOME LOW WATER CROSSINGS FLOODED IN LAMPASAS AND MILLS FROM HEAVY
THUNDERSTORMS IN THIS AREA LATE THIS AFTERNOON.

TRAVEL WITH CAUTION IN THESE AREAS THE NEXT FEW HOURS.
Special weather statement, Jun 6, 7:43 PM CDT, 2 hours 46 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
745 PM CDT FRI JUN 6 1986

A LINE OF THUNDERSTORMS WAS MOVING SOUTHEAST INTO NORTHERN EDWARDS AND
KERR COUNTIES.  REPORTS FROM LOCATIONS WITHIN KIMBLE COUNTY TO THE NORTH
INDICATED THAT SOME OF THESE THUNDERSTORMS PRODUCED RAIN OF NEAR TWO
INCHES IN LESS THAN AN HOUR.  THE STRONGEST STORMS EXTENDED FROM EAST OF
JUNCTION IN KIMBLE COUNTY TO JUST NORTH OF ROCKSPRINGS IN EDWARDS COUNTY.

RESIDENTS OF EDWARDS..KERR AND REAL COUNTIES SHOULD REMAIN ALERT TO THE
POSSIBILITY OF HEAVY RAIN.  LOW-LYING OR FLOOD-PRONE AREAS..ESPECIALLY
NEAR THE HEADWATERS OF THE GUADALUPE RIVER ARE PARTICULARLY VULNERABLE.
GROUND CONDITIONS ACROSS THE AREA ARE STILL RATHER MOIST FROM THE RAINS
OF EARLIER THIS WEEK..SO HEAVY RAIN IS LIKELY TO PRODUCE RAPID RUNOFF
..THUS ADDING TO ANY FLOOD PROBLEMS.

STAY TUNED TO NOAA WEATHER RADIO FOR ADDITIONAL STATEMENTS OR WARNINGS.
Special weather statement, Jun 6, 8:23 PM CDT, 2 hours 6 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DEL RIO TX
823 PM CDT FRI JUN 6 1986

STRONG THUNDERSTORMS WITH HEAVY RAINS WERE ABOUT 20 MILES NORTHEAST OF
LOMA ALTA ON HIGHWAY 277.  THE HEAVY RAINS CONTINUED IN THIS AREA FOR
ABOUT 2 HOURS. SOME REPORTS OF UP TO 2 AND 1/2 INCHES HAVE BEEN
REPORTED WITH THESE THUNDERSTORMS IN A HOUR.

PERSONS DRIVING ON HIGHWAY 277 NORTH..OR VACATIONING ALONG THE DRY
DEVILS RIVER IN THE NORTHEAST PART OF VAL VERDE COUNTY SHOULD BE ALERT
TO THE POSSIBILITY OF FLOODED LOW WATER CROSSINGS..OR RAPID RISES OF
WATER IN DRAWS AND CREEK BEDS.

IF YOU OBSERVE ANY AMOUT WATER COMING DOWN A DRAW OR CREEK BED IN
NORTHEAST PART OF VAL VERDE COUNTY..DO NOT WAIT..MOVE TO HIGHER GROUND
IMMEDIATELY. A SMALL TRICKLE CAN BECOME A LIFE THREATING TORRENT OF
WATER IN MINUTES.

YOU SHOULD REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY OR TO
THE NATIONAL WEATHER SERVICE.
Special weather statement, Jun 6, 8:24 PM CDT, 2 hours 5 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DEL RIO TX
823 PM CDT FRI JUN 6 1986

STRONG THUNDERSTORMS WITH HEAVY RAINS WERE ABOUT 20 MILES NORTHEAST OF
LOMA ALTA ON HIGHWAY 277.  THE HEAVY RAINS CONTINUED IN THIS AREA FOR
ABOUT 2 HOURS. SOME REPORTS OF UP TO 2 AND 1/2 INCHES HAVE BEEN
REPORTED WITH THESE THUNDERSTORMS IN A HOUR.

PERSONS DRIVING ON HIGHWAY 277 NORTH..OR VACATIONING ALONG THE DRY
DEVILS RIVER IN THE NORTHEAST PART OF VAL VERDE COUNTY SHOULD BE ALERT
TO THE POSSIBILITY OF FLOODED LOW WATER CROSSINGS..OR RAPID RISES OF
WATER IN DRAWS AND CREEK BEDS.

IF YOU OBSERVE ANY AMOUNT WATER COMING DOWN A DRAW OR CREEK BED IN
NORTHEAST PART OF VAL VERDE COUNTY..DO NOT WAIT..MOVE TO HIGHER GROUND
IMMEDIATELY. A SMALL TRICKLE CAN BECOME A LIFE THREATING TORRENT OF
WATER IN MINUTES.

YOU SHOULD REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY OR TO
THE NATIONAL WEATHER SERVICE.
Special weather statement, Jun 6, 9:34 PM CDT, 55 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
935 PM CDT JUN 6 1986

         ...THUNDERSTORMS CONTINUE TO POSE A THREAT...

SHOWERS AND A FEW THUNDERSTORMS CONTINUE TO MOVE DEEPER INTO SOUTH
CENTRAL TEXAS THIS EVENING.  AT 930 PM CDT..A LINE OF THUNDERSTORMS WAS
LOCATED FROM NEAR BLANCO SOUTHWEST TO BOERNE.  ALTHOUGH SHOWING SIGNS
OF WEAKENING OVER THE PAST TWO HOURS..SOME OF THESE THUNDERSTORMS STILL
CARRY THE POTENTIAL OF PRODUCING LOCALLY HEAVY RAINFALL.  THIS LINE WAS
CONTAINED WITHIN A BROAD AREA OF LIGHT TO MODERATE SHOWERS THAT COVERED
MUCH OF REAL..KERR..KENDALL AND BANDERA COUNTIES.  MOVEMENT CONTINUES
SOUTHEAST..BUT AT A FASTER RATE OF 20 MILES AN HOUR.

PERSONS LOCATED WITHIN LOW-LYING OR FLOOD-PRONE AREAS..ESPECIALLY IN
AND NEAR THE RIVER PLAINS OF THE GUADALUPE AND MEDINA RIVERS SHOULD BE
ALERT TO POSSIBLE FLOODING FOR THE NEXT FEW HOURS.  LOW WATER CROSSINGS
ARE ALSO SUSCEPTIBLE TO RAPID FLOODING AND MOTORISTS SHOULD NOT ATTEMPT
TO DRIVE ACROSS ROADS INUNDATED BY WATER OF UNKNOWN DEPTH.

ONE FINAL REMINDER..WITH THE INCREASE IN SPEED OF THE LINE OF STORMS..
STRONG AND POSSIBLY DAMAGING WIND NOW BECOMES A REAL THREAT.

STAY TUNE^D TO NOAA WEATHER RADIO FOR ADDITIONAL STATEMENTS AND/OR
WARNINGS.
Special weather statement, Jun 6, 10:17 PM CDT, 12 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DEL RIO TX
1017 PM CDT FRI JUN 6 1986

AT 1015 PM CDT RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN 50
MILES NORTH OF DEL RIO MOVING TO THE SOUTH SOUTHEAST AT 20 MPH.
GLASSCOCK RANCH..12 MILES NORTHEAST OF JUNO..REPORTED ONE INCH OF RAIN
IN 40 MINUTES AT 940 PM.

HEAVY RAIN..SMALL HAIL..STRONG WINDS AND FREQUENT LIGHTNING ARE
POSSIBLE WITH THESE STORMS.

BE ALERT TO THE POSSIBILIT}Y OF FLOODED LOW WATER CROSSINGS..OR RAPID
RISES OF WATER IN DRAWS AND CREEK BEDS.

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 6, 8:27 PM CDTFlash Flood WarningEWXGillespie3 hr
Jun 6, 10:36 PM CDTFlash Flood WarningEWXEdwards2 hr
Jun 6, 11:09 PM CDTFlash Flood WarningEWXBexar111 min
Jun 7, 12:55 AM CDTFlash Flood WarningEWXVal Verde2 hr

Nearby

Flash Flood Warnings in Texas, 1986Every flash flood warning in 1986

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.