Alert archive / Texas / Flash Flood Warnings in 1999

Flash Flood Warning 52, NWS Austin/San Antonio, TX

June 20, 1999Gillespie County, Kerr County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jun 20, 1999, 1:37 PM CDT for Gillespie County, Kerr County, Texas. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 20, 1999, 1:37 PM CDT (18:37 UTC)
Expired
Jun 20, 1999, 5:30 PM CDT
In force
4 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

Counties Gillespie County, TX, Kerr County, TX

The radar

The Austin/San Antonio radar (KEWX), 121 km from the middle of the area, began a volume at 18:39 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 6.6 hours before the alert went out and 187 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 1999-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1399 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 12:00Z on 1999-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 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
1399 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
502 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
45 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 201839
FFWSAT
TXC171-265-202230-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
137 PM CDT SUN JUN 20 1999

THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  GILLESPIE COUNTY IN TEXAS
  KERR COUNTY IN TEXAS

* UNTIL 530 PM CDT

* AT 115 PM...NATIONAL WEATHER SERVICE COOPERATIVE OBSERVERS IN
FREDERICKSBURG AND SOUTH OF HUNT HAVE REPORTED 4 TO 6
INCHES OF RAIN SHINCE 6 AM THIS MORNING.  DOPPLER RADAR
INDICATED MORE TROPICAL SHOWERS MOVING NORTH THROUGH KERR COUNTY
AND GILLESPIE COUNTY.  THE LBJ STATE PARK BRIDGE LEADING TO THE GOLF
COURSE IN FLOODED.  NUMEROUS LOW WATER CROSSINGS ARE FLOODED IN
KERR COUNTY.

* ADDITIONAL 2 TO 3 INCH TOTALS ARE POSSIBLE FROM THE REPEAT
SHOWERS AND THUNDERSTORMS IN THESE AREAS.

DON'T CAMP NEAR STREAMS OR OTHER LOW AREAS SUBJECT TO FLOODING!
SMALL STREAM AND CREEKS WILL BE VERY DANGEROUS...FLOODING
SECONDARY ROADS AND LOW WATER CROSSINGS.  THE GUADALUPE RIVER OVER
HIGHWAY 39 IN KERR COUNTY MAY FLOOD.
CFM


&

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 5:47 PM CDTFlash Flood WarningEWXGillespie3 hr

Nearby

Flash Flood Warnings in Texas, 1999Every flash flood warning in 1999

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; radar from the NEXRAD Level II archive.