Alert archive / Texas / Flash Flood Warnings in 1991

Flash Flood Warning 40, NWS Austin/San Antonio, TX

September 23, 1991Burnet County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Sep 23, 1991, 7:39 AM CDT for Burnet County, Texas. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Sep 23, 1991, 7:39 AM CDT (12:39 UTC)
Expired
Sep 23, 1991, 10:45 AM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Burnet County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 0.7 hours before the alert went out and 300 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 1991-09-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 334 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 12:00Z on 1991-09-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 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
334 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
811 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
17 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

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, 4:48 AM CDT, 2 hours 51 minutes before
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Special weather statement, Sep 23, 6:42 AM CDT, 57 minutes before
TXZ034>036-231400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
640 AM CDT MON SEP 23 1991

...THUNDERSTORMS WITH HEAVY RAINS OVER BURNET COUNTY...

AT 635 AM...THUNDERSTORMS...SOME WITH HEAVY RAINS WERE FROM LAKE TRAVIS
TO MARBLE FALLS NORTHWARD TO BERTRAM AND BURNET.  THE HEAVY RAIN AREAS
WERE FOUND JUST WEST OF LEANDER AND JUST NORTH OF BERTRAM.

MOVEMENT OF THE RAIN WAS VERY SLOWLY TORWARD THE EAST...WHILE THE AREA
WAS BUILDING TO THE SOUTHWEST.

THIS RAIN AREA HAS BEEN OVER BURNET COUNTY FOR THE PAST TWO HOURS AND
HEAVY RAINS HAS BEEN REPORTED OVER THE CITY OF BURNET BY THE SHERIFFS
OFFICE AND KHLB RADIO STATION.

PERSONS SHOULD NOT ATTEMPT TO CROSS FLOODED LOW WATER CROSSINGS.  CAMPERS
NEAR STREAMS AND RIVERS SHOULD MONITOR WATER LEVELS.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 23, 11:30 AM CDTFlash Flood WarningEWXUvalde2 hr
Sep 23, 12:47 PM CDTFlash Flood WarningEWXComal, Guadalupe118 min
Sep 23, 2:48 PM CDTFlash Flood WarningEWXComal, Guadalupe117 min
Sep 23, 3:25 PM CDTFlash Flood WarningEWXDeWitt3 hr

Nearby

Flash Flood Warnings in Texas, 1991Every flash flood warning in 1991

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.