Alert archive / Texas / Flash Flood Warnings in 1990

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

July 19, 1990Val Verde County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jul 19, 1990, 6:10 AM CDT for Val Verde County, Texas. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Jul 19, 1990, 6:10 AM CDT (11:10 UTC)
Expired
Jul 19, 1990, 10:00 AM CDT
In force
4 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Val Verde 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 00:00Z, 11.2 hours before the alert went out and 66 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 00:00Z on 1990-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 121 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, Del Rio, TX at 00:00Z on 1990-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 47 square meters per square second.1939Sfc1 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
121 J/kg
Mixed-layer CIN
-131 J/kg
Mixed-layer LCL
886 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
47 m²/s²
0-3 km storm-relative helicity
125 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KDRT 191109
FFWDRT
TXC465-191500-

BULLETIN - EBS ACTIVITATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DEL RIO TX
610 AM CDT THU JUL 19 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 1000 AM FOR PEOPLE IN THE FOLLOWING COUNTY IN

SOUTHCENTRAL TEXAS...VAL VERDE.

RADAR INDICATED LARGE AREAS OF RAIN FALLING OVER THE EASTERN HALF OF VAL
VERDE COUNTY. THESE SHOWERS ARE FALLING OVER AREAS WHICH ARE ALREADY
SATURATED FROM THE PREVIOUS RAIN AND WILL CAUSE ADDITIONAL RUNOFF AND
FLOODING NEAR CREEKS...STREAMS AND LOW WATER CROSSINGS. THUNDERSTORMS
WITH INDICATED RAINFALL RATE OF 0NE AND A HALF TO TWO AND A HALF
INCHES PER HOUR WERE LOCATED IN THE COMSTOCK AREA FOR THE PAST 2
HOURS. NEAR COMSTOCK YESTERDAY ANYWHERE FROM 3 TO 6 INCHES OF RAIN FELL
IN THE EARLY AFTERNOON HOURS SO THAT GROUND IS WELL SATURATED.

FM ROAD 1024 AND HIGHWAY 163 GOING NORTH OUT OF COMSTOCK HAS BEEN
CLOSED TO TRAFFIC BECAUSE OF FLOODED LOW WATER CROSSINGS.

AN AREA OF RAIN WITH EMBEDDED SHOWERS AND THUNDERSTORMS EXTENDS
FROM THE NORTHERN VAL VERDE COUNTY LINE SOUTH TO 30 MILES SOUTH OF EAGLE
PASS. THUNDERSTORMS WITH VERY HEAVY RAIN WERE LOCATED 25 MILES SOUTH OF
DEL RIO. THE SLOW NORTHWEST MOVEMENT OF THIS AREA OF RAIN SHOULD
CONTINUE TO BRING ADDITIONAL RAINFALL ACROSS THE AREA THROUGH TONIGHT.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOTH
ATTEMPT TO CROSS BRIDGES..DIPS..OR LOW SPOTS IF WATER COVERS THE
ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM..EVEN A SMALL ONE..ON
FOOT.  TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 19, 10:03 AM CDTFlash Flood WarningEWXVal Verde4 hr

Nearby

Flash Flood Warnings in Texas, 1990Every flash flood warning in 1990

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.