Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 207, NWS Austin/San Antonio, TX

September 8, 2002Llano County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Sep 8, 2002, 1:01 AM CDT for Llano County, Texas. It was in force for 119 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Sep 8, 2002, 1:01 AM CDT (06:01 UTC)
Expired
Sep 8, 2002, 3:00 AM CDT
In force
119 min
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

County Llano County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 6.0 hours before the alert went out and 255 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 2002-09-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 152 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 00:00Z on 2002-09-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 27 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
152 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
1982 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
27 m²/s²
0-3 km storm-relative helicity
25 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 080601
FFWSAT
TXC299-080800-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
100 AM CDT SUN SEP 8 2002

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL 300 AM CDT

* AT 100 AM...WEATHER SERVICE DOPPLER RADAR INDICATED AREAS OF
  VERY HEAVY RAIN OVER PARTS OF LLANO...MOVING WEST AT 20 MPH.
  IN ADDITION...MORE AREAS OF RAIN MAY FORM OVER THE COUNTY IN THE   
  NEXT HOUR.  

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL 
CREEKS...STREAMS...HIGHWAYS...UNDERPASSES AND COUNTRY ROADS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE 
ROADWAY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED 
QUICKLY. 

LAT...LON 3053 9895 3052 9839 3060 9843 3071 9845
          3091 9847 3091 9895

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 7, 7:03 PM CDTFlash Flood WarningEWXUvalde117 min
Sep 7, 8:00 PM CDTFlash Flood WarningEWXTravis, Williamson2 hr
Sep 7, 8:47 PM CDTFlash Flood WarningEWXBurnet, Gillespie, Llano118 min
Sep 7, 10:00 PM CDTFlash Flood WarningEWXTravis, Williamson3 hr
Sep 7, 11:03 PM CDTFlash Flood WarningEWXBurnet, Llano117 min
Sep 8, 4:18 AM CDTFlash Flood WarningEWXBexar3 hr
Sep 8, 9:15 AM CDTFlash Flood WarningEWXDeWitt3 hr
Sep 8, 9:59 AM CDTFlash Flood WarningEWXBlanco, Burnet, Llano, Travis, Williamson2 hr
Sep 8, 12:06 PM CDTFlash Flood WarningEWXBurnet, Williamson114 min
Sep 8, 1:42 PM CDTFlash Flood WarningEWXLavaca2 hr
Sep 8, 2:00 PM CDTFlash Flood WarningEWXAtascosa3 hr
Sep 8, 4:53 PM CDTFlash Flood WarningEWXBexar, Karnes, Wilson3 hr

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.