Alert archive / Texas / Flash Flood Warnings in 1992

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

April 17, 1992Maverick County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Apr 17, 1992, 12:26 AM CDT for Maverick County, Texas. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Apr 17, 1992, 12:26 AM CDT (05:26 UTC)
Expired
Apr 17, 1992, 3:30 AM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Maverick County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 5.4 hours before the alert went out and 86 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 1992-04-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2243 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 00:00Z on 1992-04-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 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
2243 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
1067 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
44 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 170528
FFWSAT
TXC323-170830-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
1226 AM CDT FRI APR 17 1992
 
THE NATIONAL WEATHER SERVICE IN SAN ANTONIO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  330 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTH TEXAS
 
   ...MAVERICK COUNTY
 
AT 1225 AM CDT...NATIONAL WEATHER SERVICE RADAR WAS INDICATING
NUMEROUS SHOWERS AND STRONG THUNDERSTORMS ACROSS MAVERICK COUNTY.
MOVEMENT WAS NORTH AT LESS THAN 10 MILES AN HOUR...THUS POINTING TO
THE HIGH LIKELIHOOD OF SOME FLOODING WITHIN THE COUNTY DURNG THE NEXT
FEW HOURS.
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOOgDS AND FLASH FLOODS.  IF FLASH FLOODING IS OBSERVED
ACT QUICKLY.  MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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, Apr 16, 7:46 PM CDT, 4 hours 40 minutes before
TXZ054-170245-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DEL RIO TX
750 PM CDT THU APR 16 1992

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR VAL VERDE COUNTY UNTIL
MIDNIGHT CDT...

AT 745 PM CDT RADAR INDICATED THUNDERSTORMS DEVELOPING THROUGHOUT VAL
VERDE COUNTY WITH THE STRONGEST BEING NEAR PANDALE...50 NORTHWEST OF
DEL RIO AND IN MEXICO 50 MILES WEST OF DEL RIO. THESE STORMS WERE MOVING
EAST AT 10 MPH.

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

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE
FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PEOPLE IN
THESE AREAS SHOULD BE ON FTHE LOOKOUT FOR THREATENING WEATHER CONDITIONS
AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, Apr 16, 8:05 PM CDT, 4 hours 21 minutes before
TXZ035-036-037-170200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
8 PM CDT THUR APR 16 1992

...THUNDERSTORMS NORTH AND DISTANT SOUTHWEST OF AUSTIN...

AT 755 PM CDT AUSTIN RADAR SHOWED THUNDERSTORMS WITH VERY HEAVY RAINS
AND DANGEROUS LIGHTNING FROM NORTHEAST OF GEORGETOWN TO WEST OF CAMERON.
THIESE ARE PART OF A LARGE AREA OF MOSTLY SHOWERS THAT EXTEND FROM CENTRAL
WILLIAMSON COUNTY NORTHWARD TO WEST OF WACO. MOVEMENT WAS TOWARJDS
THE EAST AT 20 MPH.

ANOTHER AREA OF SHOWERS AND THUNDERSTORMS WERE LOCATED FROM WEST OF
JOHNSON CITY SOUTHWARD TO SOUTH OF SAN ANTONIO AND HONDO. THIS AREA
IS SHOWING LITTLE OR NO MOVEMENT.
PJL
Special weather statement, Apr 16, 9:12 PM CDT, 3 hours 14 minutes before
TXZ054-170415-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DEL RIO TX
915 PM CDT THU APR 16 1992

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR VAL VERDE COUNTY UNTIL
MIDNIGHT CDT...

AT 910 PM CDT THUNDERSTORMS WITH FREQUENT DANGEROUS LIGHTNING WERE
OBSERVED AT DEL RIO INTERNATIONAL AIRPORT. RADAR ALSO INDICATED A
THUNDERSTORM DEVELOPING 15 MILES WEST OF DEL RIO MOVING SLOWLY EAST.
THIS THUNDERSTORM WAS PART OF A LARGE AREA OF THUNDERSTORMS STRETCHING
FROM 10 MILES WEST TO 50 MILES WEST TO 50 MILES SOUTHWEST OF DEL RIO.

LARGE HAIL...HEAVY RAIN...AND DAMAGING WINDS ARE POSSIBLE WITH THESE
STORMS.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE
FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PEOPLE IN
THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS
AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, Apr 16, 11:31 PM CDT, 55 minutes before
TXZ054-170630-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DEL RIO TX
1135 PM CDT THU APR 16 1992

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR VAL VERDE COUNTY UNTIL
MIDNIGHT CDT...

AT 1130 PM CDT RADAR INDICATED AN INTENSE THUNDERSTORM WITH HAIL 45
MILES NORTH OF DEL RIO...10 MILES NORTH OF LOMA ALTA. THIS THUNDERSTORM
WAS PART OF A LARGE AREA OF THUNDERSTORMS STRETCHING FROM 75 MILES NORTH
TO 75 MILES SOUTH OF DEL RIO. THESE STORMS WERE MOVING TO THE EAST AT
10 MPH.

SOME LOW WATER CROSSINGS AND LOW LYING AREAS MAY BE FLOODED. MOTORISTS
ARE URGED TO SLOW DOWN AND USE CAUTION WHEN APPROACHING LOW WATER
CROSSINGS.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE
FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PEOPLE IN
THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS
AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, Apr 16, 11:37 PM CDT, 49 minutes before
TXZ038-039-041-170700-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
1130 PM CDT THU APR 16 1992

WEATHER SERVICE RADARS SHOW AN AREA OF SHOWERS AND THUNDERSTORMS ALONG
THE RIO GRANDE FROM SOUTH OF LAREDO TO NORTH OF DEL RIO.

AT 1130 PM...A THUNDERSTORM WITH LOCALLY HEAVY RAIN...GUSTY WINDS AND
SMALL HAIL IS LOCATED NEAR THE EAGLE PASS-PIEDRAS NEGRAS AREA.  OTHER
THUNDERSTORMS ARE WEST OF LAREDO.  THESE STORMS HAVE SHOWN LITTLE IF
ANY MOVEMENT DURING THE PAST HOUR BUT COULD DRIFT ACROSS THE RIVER
AND AFFECT PARTS OF TEXAS DURING THE NEXT FEW HOURS.

RESIDENTS ALONG THE RIO GRANDE...ESPECIALLY IN AND AROUND EAGLE PASS
AND LAREDO...SHOULD BE ALERT TO THE APPROACHING WEATHER AND PLAN
ACCORDINGLY.  THE HEAVY RAIN COULD PRODUCE LOCALIZED FLOODING IN LOW-
LYING AREAS NEAR THE RIO GRANDE.

ADDITIONAL STATEMENTS OR WARNINGS WILL BE ISSUED AS CONDITIONS WARRANT.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 16, 7:15 PM CDTFlash Flood WarningEWXBexar, Medina4 hr
Apr 16, 7:44 PM CDTFlash Flood WarningEWXMedina4 hr
Apr 17, 2:55 AM CDTFlash Flood WarningEWXReal, Uvalde2 hr
Apr 17, 5:38 AM CDTSevere Thunderstorm WarningEWXMcMullen52 min
Apr 17, 3:08 PM CDTFlash Flood WarningEWXJackson, Victoria2 hr

Nearby

Flash Flood Warnings in Texas, 1992Every flash flood warning in 1992

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.