Alert archive / Texas / Flash Flood Warnings in 1990

Flash Flood Warning 8, NWS Austin/San Antonio, TX

May 2, 1990Kendall County, Kerr County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at May 2, 1990, 4:35 AM CDT for Kendall County, Kerr County, Texas. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
May 2, 1990, 4:35 AM CDT (09:35 UTC)
Expired
May 2, 1990, 8:30 AM CDT
In force
4 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

Counties Kendall County, TX, Kerr 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, 9.6 hours before the alert went out and 188 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 1990-05-02Temperature 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 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 1990-05-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 201 square meters per square second.19395878Sfc1 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
632 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
201 m²/s²
0-3 km storm-relative helicity
323 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 020937
FFWSAT
TXC259-265-021330-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
435 AM CDT WED MAY 2 1990
 
THE NATIONAL WEATHER SERVICE IN SAN ANTONIO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  830 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTH TEXAS
          ...KENDALL...KERR
 
THE KERRVILLE FIRE DEPARTMENT REPORTS THAT OVER 3 INCHES OF RAIN HAS
FALLEN IN THE KERRVILLE AND CENTER POINT AREAS OVERNIGHT...CAUSING
FLASH FLOODING OF LOW WATER CROSSINGS IN KERR COUNTY. THE KENDALL
COUNTY SHERIFFS DEPARTMENT REPORTS THAT FLASH FLOODING HAS OCCURRED IN
NORTHERN KENDALL COUNTY AS HEAVY RAINFALL PRODUCED BETWEEN 2 AND 3
INCHES OF RAIN OVER NORTHERN KENDALL COUNTY OVERNIGHT.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN
REPORTED.
 
REMEMBER...DEATHS DURING FLASH FLOODING ARE FREQUENTLY RELATED TO
MOTORISTS DRIVING INTO FLOODED LOW WATER CROSSINGS OR FROM C2HILDREN
PLAYING NEAR FLOODED STREAMS OR DRAINAGE AREAS.

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 1, 11:27 PM CDT, 5 hours 8 minutes before
TXZ030-034>037-020500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
1120 PM CDT TUE MAY 1 1990

...A FLASH FLOOD WATCH IS IN EFFECT TONIGHT FOR MILLS...LAMPASAS AND
SAN SABA COUNTIES.

...VERY HEAVY RAINS OVER WEST AND NORTHWEST AUSTIN...

AT 1105 PM WEATHER RADAR INDICATED SHOWERS AND THUNDERSTORMS FROM NORTH
OF UVALDE NORTHEAST ACROSS THE FREDERICKSBURG...JOHNSON CITY...LAKE
TRAVIS AND NORTHWEST AUSTIN AREAS AND INTO EAST NORTHEAST OF COLLEGE
STATION.  THESE THUNDERSTORMS WERE MOVING NORTHEAST AT NEAR 20 MPH AND
IT IS POSSIBLE THAT MORE THAN ONE STORM COULD MOVE OVER THE SAME AREA.

NORTHWEST AUSTIN REPORTED 2.48 INCHES OF RAIN SINCE 10 PM. MOTORIST
ARE URGED TO USE EXT4REME CAUTION AS ROADWAYS AND LOW WATER CROSSINGS
COULD BECOME FLOODED VERY RAPIDLY.

The office that day

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

IssuedProductOfficeCountiesLasted
May 2, 12:51 AM CDTFlash Flood WarningEWXTravis, Williamson114 min
May 2, 7:20 AM CDTFlash Flood WarningEWXEdwards3 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.