Alert archive / Texas / Flash Flood Warnings in 2012

Flash Flood Warning 41, NWS Austin/San Antonio, TX

July 10, 2012Bastrop County, Travis County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jul 10, 2012, 7:06 AM CDT for Bastrop County, Travis County, Texas. It was in force for 114 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 10, 2012, 7:06 AM CDT (12:06 UTC)
Expired
Jul 10, 2012, 9:00 AM CDT
In force
114 min
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon
Flood severity
None

Counties Bastrop County, TX, Travis County, TX

The radar

The Ft Hood radar (KGRK), 56 km from the middle of the area, began a volume at 12:07 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.

What was reported inside it

TimeReportWhereRemark
Jul 10, 7:36 AM CDTFLASH FLOOD4 Ne Garfield, TXPUBLIC REPORTS FM 969 TO UPPER ELGIN ROAD IN WEBBERVILLE CLOSED DUE TO FLOODING

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 0.1 hours before the alert went out and 278 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, Corpus Christi, TX at 12:00Z on 2012-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1787 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, Corpus Christi, TX at 12:00Z on 2012-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 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
1787 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
726 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
87 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.

130 
WGUS54 KEWX 101206
FFWEWX
TXC021-453-101400-
/O.NEW.KEWX.FF.W.0041.120710T1206Z-120710T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
706 AM CDT TUE JUL 10 2012

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL BASTROP COUNTY...
  EAST CENTRAL TRAVIS COUNTY...

* UNTIL 900 AM CDT.

* AT 701 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE
  DETERMINED THAT RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE SLOW
  MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS EASTERN
  TRAVIS COUNTY AND WESTERN BASTROP COUNTY.  THE HEAVY RAINFALL
  AS INDICATED JUST EAST OF WEBBERVILLE.  ADDITIONAL RAINFALL
  AMOUNTS OF 1 TO 2 INCHES ARE EXPECTED OVER AREAS THAT ALREADY
  RECEIVED 2 TO 4 INCHES OF RAINFALL.  

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  WYLDWOOD.

FARM ROAD 969 NEAR TRAVIS AND BASTROP COUNTY LINE COULD HAVE WATER 
OVER THE ROAD DUE TO EXCESSIVE RAINFALL. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN WATER COVERS THE ROAD...TURN AROUND DON'T DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.

&&

LAT...LON 3016 9735 3006 9746 3015 9753 3041 9754
      3041 9743

$$
1 follow-up statement
573 
WGUS74 KEWX 101229
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
729 AM CDT TUE JUL 10 2012

TXC021-453-101400-
/O.CON.KEWX.FF.W.0041.000000T0000Z-120710T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TRAVIS TX-BASTROP TX-
729 AM CDT TUE JUL 10 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 900 AM CDT FOR WEST
CENTRAL BASTROP AND EAST CENTRAL TRAVIS COUNTIES...

AT 720 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO 
DETECT A CLUSTER OF SHOWERS AND THUNDERSTORMS PRODUCING VERY HEAVY 
RAIN OF 1 TO 2 INCHES PER HOUR BETWEEN MANOR...WEBBERVILLE... 
WYLDWOOD...PHELAN AND ELGIN.  THE ADDITIONAL RAINFALL WILL FALL ON 
AREAS THAT HAVE ALREADY RECEIVED HEAVY RAINFALL OVERNIGHT.  FARM 
ROAD 969 COULD HAVE WATER OVER THE ROAD OR FLOODED LOW WATER 
CROSSINGS. MOTORISTS ARE URGED TO USE EXTRA CAUTION.     

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN WATER COVERS THE ROAD...TURN AROUND DON'T DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.

&&

LAT...LON 3016 9735 3006 9746 3015 9753 3041 9754
      3041 9743

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 6:44 AM CDTAreal Flood AdvisoryEWXBastrop, Travis106 min
Jul 10, 8:53 AM CDTFlash Flood WarningEWXBastrop, Travis3 hr
Jul 10, 10:06 AM CDTAreal Flood AdvisoryEWXFrio, Medina114 min
Jul 10, 3:53 PM CDTAreal Flood AdvisoryEWXMedina, Uvalde2 hr
Jul 10, 6:48 PM CDTAreal Flood AdvisoryEWXBandera, Edwards, Real2 hr

Nearby

Flash Flood Warnings in Texas, 2012Every flash flood warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.