Alert archive / Texas / Flash Flood Warnings in 1987

Flash Flood Warning 71, NWS Austin/San Antonio, TX

June 11, 1987Real County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jun 11, 1987, 6:47 PM CDT for Real County, Texas. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jun 11, 1987, 6:47 PM CDT (23:47 UTC)
Expired
Jun 11, 1987, 10:00 PM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Real 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

Del Rio, TX (KDRT), launched 12:00Z, 11.8 hours before the alert went out and 111 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, Del Rio, TX at 12:00Z on 1987-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1346 joules per kilogram.LCLEL10008507005003002001001 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, Del Rio, TX at 12:00Z on 1987-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 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
1346 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
528 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
39 m²/s²
0-3 km storm-relative helicity
36 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 112339
FFWSAT
TXC385-120300-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
647 PM CDT THU JUN 11 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL  1000 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH TEXAS
          ...REAL
 
THUNDERSTORMS PRODUCING VERY HEAVY RAINFALL ARE OCCURRING OVER
NORTHERN REAL COUNTY. THESE THUNDERSTORMS ARE NEARLY STATIONARY AND
HEAVY RAINFALL IS EXPECTED TO CONTINUE WITH FLASH FLOODING OF LOW WATE
CROSSINGS AND LOW LYING AREAS LIKELY. HIGHWAY 336 SOUTH OF LEAKY
IS CLOSED.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN
REPORTED.
 
YOU SHOULD ASK THE N>EAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR
SEVERE WEATHER REPORTS TO THE LOCAL NATIONAL WEATHER SERVICE OFFICE.

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 11, 4:23 PM CDT, 2 hours 24 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DEL RIO TX
423 PM CDT THU JUN 11 1987

...THE FLASH FLOOD WATCH FOR VAL VERDE COUNTY IS NO LONGER IN
EFFECT...

AT 420 PM CDT RADAR INDICATED RAINSHOWERS AND THUNDERSTORMS
25 MILES SOUTHWEST OF DEL RIO IN OLD MEXICO. ANOTHER AREA OF
THUNDERSTORMS WAS NEAR LANGTRY IN WESTERN VAL VERDE COUNTY. MOVEMENT
WAS TO THE NORTHEAST AT 10 MILES AN HOUR.

BOATERS ON THE RIO GRANDE...PECOS...DEVILS...AND AMISTAD LAKE SHOULD
CONINUE TO MONITOR THE WEATHER AND BE PREPARED TO MOVE TO A SAFE
HARBOR SHOULD THE WEATHER BECOME THREATENING.

SMALL HAIL...HEAVY RAIN...STRONG GUSTY WINDS AND FREQUENT DANGEROUS
LIGHTNING ARE LIKELY WITH THESE STORMS.

FIVE FEET OF WATER WAS REPORTED IN THE DRY DEVILS RIVER AND 7 FEET OF
WATER WAS OVER HIGHWAY 189 IN NORTHERN VAL VERDE COUNTY. HIGHWAYS
163 AND 189 ARE CLOSED.

SOME LOW AREAS OF ROADWAYS MAY BECOME FLOODED. MOTORISTS ARE URGED
TO USE CAUTION AND NOT ATTEMPT TO CROSS FLOODED LOW WATER CROSSINGS.

CAMPERS AND CANOEISTS ALONG THE DEVILS RIVER SHOULD USE EXTREME
CAUTION...KEEP A LOOKOUT AND BE READY TO MOVE TO HIGHER GROUND.

YOUR NATIONAL WEATHER SERVICE WILL ISSUE ADDITIONAL STATEMENTS...SO
STAY TUNED TO YOUR LOCAL RADIO...TV...OR NOAA WEATHER RADIO.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 10, 8:09 PM CDTFlash Flood WarningEWXMedina3 hr
Jun 11, 10:45 AM CDTFlash Flood WarningEWXGuadalupe3 hr
Jun 11, 11:14 AM CDTFlash Flood WarningEWXBexar106 min
Jun 11, 12:55 PM CDTFlash Flood WarningEWXBexar2 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.