Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 195, NWS Austin/San Antonio, TX

August 10, 2002Travis County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Aug 10, 2002, 3:43 PM CDT for Travis County, Texas. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 10, 2002, 3:43 PM CDT (20:43 UTC)
Expired
Aug 10, 2002, 5:45 PM CDT
In force
2 hr
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

County Travis County, TX

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 8.7 hours before the alert went out and 284 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, Fort Worth, TX at 12:00Z on 2002-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2646 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Worth, TX at 12:00Z on 2002-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 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
2646 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
782 m above ground
0-6 km bulk shear
1 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
47 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 
WGUS54 KEWX 102043
FFWSAT
TXC453-102245-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
342 PM CDT SAT AUG 10 2002

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES...
  TRAVIS

* UNTIL 545 PM CDT

* AT 342 PM...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN
  OVER AUSTIN...MOVING NORTHWEST AT 20 MPH.

OVER THE PAST HOUR...THUNDERSTORMS OVER TRAVIS COUNTY HAVE BEEN 
TRAINING ALONG AN EAST-WEST LINE FROM NEAR LAGO VISTA...ACROSS 
DOWNTOWN AUSTIN...TO NEAR DEL VALLE. RAINFALL AMOUNTS OF 2 TO 3 
INCHES HAS BEEN ESTIMATED BY RADAR OVER THESE AREAS. THE AUSTIN FIRE 
DEPARTMENT HAS CONFIRMED THEY HAVE BEGUN CLOSING ROADWAYS.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL 
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. MOST FLASH FLOOD 
DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES... 
DIPS...OR OTHER LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO 
CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE 
RISING WATER MOVE UP TO HIGHER GROUND.

LAT...LON 3017 9771 3032 9760 3057 9801 3035 9810
1 follow-up statement
000 
WGUS74 KEWX 102212
FFSSAT
TXC453-112240-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
505 PM CDT SAT AUG 10 2002

...THE FLASH FLOOD WARNING FOR TRAVIS COUNTY HAS BEEN CANCELLED...

...AN URBAN AND SMALL STREAM FLOOD ADVISORY EXPIRES AT 530 PM FOR 
WILLIAMSON COUNTY...

NATIONAL WEATHER SERVICE RADAR INDICATED THE RAINFALL HAS ENDED 
ACROSS TRAVIS COUNTY...AND THE FLOOD THREAT IS DIMINISHED. 
SOME MINOR FLOODING MAY CONTINUE...BUT THE THREAT OF SERIOUS 
FLOODING HAS ENDED...AND THE FLASH FLOOD WARNING HAS BEEN CANCELLED.

RAINFALL ESTIMATES OVER EASTERN WILLIAMSON COUNTY RANGED FROM 1 TO 4 
INCHES IN THE PAST 6 HOURS.

RUNOFF THESE HEAVY RAINFALL AMOUNTS WILL LIKELY CONTINUE TO KEEP 
NORMALLY DRY CREEK BEDS....CULVERTS...LOW WATER CROSSINGS AND POOR 
DRAINAGE AREAS FLOODED THROUGH 530 PM. 

STAY TUNED TO LOCAL MEDIA OUTLETS FOR THE LATEST WEATHER INFORMATION.

Nearby

Flash Flood Warnings in Texas, 2002Every flash flood warning in 2002

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.