Alert archive / Texas / Flash Flood Warnings in 1990

Flash Flood Warning 58, NWS Austin/San Antonio, TX

September 23, 1990Val Verde County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Sep 23, 1990, 10:00 AM CDT for Val Verde County, Texas. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
Sep 23, 1990, 10:00 AM CDT (15:00 UTC)
Expired
Sep 23, 1990, 2:30 PM CDT
In force
5 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 12:00Z, 3.0 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 12:00Z on 1990-09-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 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 1990-09-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
665 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
297 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 KDRT 231457 RRA
FFWDRT
TXC465-231930-

BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DEL RIO TX
1000 AM CDT SUN SEP 23 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 230 PM FOR PEOPLE IN THE FOLLOWING COUNTY IN

SOUTHCENTRAL TEXAS...VAL VERDE

AT 955 AM CDT RADAR INDICATED THUNDERSTORMS WITH HEAVY RAIN FROM 75
MILES SOUTH TO 40 MILES NORTH OF DEL RIO. THESE STORMS WERE MOVING
SLOWLY TO THE NORTHWEST.

AT GLASSCOCK RANCH...12 MILES NORTHEAST OF JUNO...16 FEET OF WATER WAS
OVER THE ROAD. THE DEVILS RIVER AT BAKERS CROSSING WAS AT 15.5 FEET
AND RISING. AT 600 AM CDT THE PECOS RIVER GAGE AT PANDALE WAS AT 6.32
FEET. HIGHWAYS 163...189...AND FM 1024 REMAIN CLOSED.
 
CAMPERS AND CANOISTS ALONG THE DEVILS...DRY DEVILS...AND PECOS RIVERS
SHOULD HAVE MOVED TO HIGHER GROUND. CAMPERS ALONG THE RIO GRANDE
DOWNSTREAM FROM DRYDEN SHOULD BE ALERT FOR RISING WATER. AT 6 AM CDT
THE RIO GRANDE RIVER GAGE AT DRYDEN WAS AT 18.55 FEET. THIS WATER WILL
CONTINUE DOWNSTREAM TO LAKE AMISTAD TODAY.

MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS
BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROAD. NEVER TRY TO
CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING
WATER MOVE UP TO HIGHER GROUND.

REMEMBER...A FLASH FLOOD WATCH MEANS THAT FLOODING IS IMMINENT OR
ALREADY OCCURRING. TAKE NECESSARY PRECAUTIONS FOR PROTECTION OF LIFE
OR PROPERTY IMMEDIATELxY.

...A FLASH FLOOD WATCH IS IN EFFECT FOR VAL VERDE COUNTY THROUGH
TODAY...

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, Sep 23, 7:50 AM CDT, 2 hours 10 minutes before
BULLETIN
URBAN FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
750 AM CDT SUN SEP 23 1990

BRIEF HEAVY RAIN FROM THUNDERSTORMS MOVED ACROSS THE SOUTHERN PORTION OF
THE CITY OF LAREDO BETWEEN 630 AM AND 730 AM THIS MORNING.  THE ACTIVITY
PRODUCED BETWEEN 1/2 INCH AND 1 INCH OF RAIN.  THE LAREDO DEPARTMENT OF
PUBLIC SAFETY REPORTS THAT SEVERAL LOW LYING AND POORLY DRAINED AREAS
IN THE SOUTH PORTION OF THE CITY ALONG HWY 83 ARE FLOODED AT THIS TIME.

SINCE THE RAINFALL AROUND THE CITY HAS DIMINISHED IN THE PAST 20 MINUTES
THE FLOODED AREAS WILL BEGIN TO DRAIN SLOWLY.  PERSONS ARE URGED NOT TO
TRY TO DRIVE THROUGH FLOODED LOW WATER CROSSINGS...BUT RATHER FIND AN
ALTERNATE ROUTE AROUND TpHEM.  PARENTS ARE URGED TO KEEP CHILDREN AWAY
FROM FLOODED CREEKS AND DRAINAGE DITCHES UNTIL THE WATER CAN RECEDE.
Special weather statement, Sep 23, 9:09 AM CDT, 51 minutes before
BULLETIN
URBAN FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
910 AM CDT SUN SEP 23 1990

URBAN FLOODING CONTINUES TO BE REPORTED OVER THE SOUTHERN SECTIONS OF
THE CITY OF LAREDO FROM RAINS EARLIER THIS MORNING.  LIGHT TO MODERATE
RAINS CONTINUED AROUND THE LAREDO AREA...SO THE WATER WILL BE SLOW TO
RECEDE DURING THE NEXT COUPLE OF HOURS.

MOTORISTS ARE URGED TO WATCH FOR WATER IN LOW-LYING AREAS AND AVOID
DRIVING THROUGH FLOODED ROADWAYS.  ALSO PARENTS ARE URGED TO KEEP
CHILDREN AWAY FROM FLOODED DRAINAGE AREAS, CREEKS, AND RIVERS UNTIL
THE WATER HAS RECEDED.

A FLASH FLOOD WATCH CONTINUES IN EFFECT FOR THE LAREDO AREA THROUGH
TODAY.  HEAVY RAINS ARE POSSIBLE IN ASSOCIATION WITH% THE FIRST COLD
FRONT OF THE SEASON MEETING MOIST UNSTABLE TROPICAL AIR.  PEOPLE
IN AND AROUND THE LAREDO AREA SHOULD LISTEN FOR WEATHER DEVELOPMENTS
THROUGHOUT THE DAY.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 22, 8:20 PM CDTFlash Flood WarningEWXVal Verde4 hr
Sep 22, 8:35 PM CDTFlash Flood WarningEWXKinney, Maverick, Uvalde, Zavala115 min
Sep 23, 12:20 AM CDTFlash Flood WarningEWXVal Verde4 hr
Sep 23, 5:10 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.