Alert archive / Texas / Flash Flood Warnings in 2012

Flash Flood Warning 42, 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, 8:53 AM CDT for Bastrop County, Travis County, Texas. It was in force for 3 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
Jul 10, 2012, 8:53 AM CDT (13:53 UTC)
Expired
Jul 10, 2012, 12:00 PM CDT
In force
3 hr
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), 53 km from the middle of the area, began a volume at 13:55 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

Corpus Christi, TX (KCRP), launched 12:00Z, 1.9 hours before the alert went out and 281 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.

447 
WGUS54 KEWX 101353
FFWEWX
TXC021-453-101700-
/O.NEW.KEWX.FF.W.0042.120710T1353Z-120710T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL NOON CDT.

* AT 850 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE
  DETERMINED THAT RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE     
  FLASH FLOODING IN THE VICINITY OF WEBBERVILLE. NEAR 2 INCHES OF    
  RAIN BAS FALEN IN THE PAST HOUR. ADDITIONAL RAINS OF NEAR 1 INCH   
  ARE EXPECTED IN THE NEXT HOUR OR SO

* FLASH FLOODING IS EXPECTED TO OCCUR OVER MAINLY RURAL AREAS OF EAST
  CENTRAL TRAVIS AND NORTHWESTERN BASTROP COUNTIES...INCLUDING THE
  TOWN OF WEBBERVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3027 9741 3018 9745 3019 9754 3031 9751
      3029 9744

$$
2 follow-up statements
123 
WGUS74 KEWX 101452
FFSEWX

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

TXC021-453-101700-
/O.CON.KEWX.FF.W.0042.000000T0000Z-120710T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TRAVIS TX-BASTROP TX-
952 AM CDT TUE JUL 10 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL NOON CDT FOR
NORTHWESTERN BASTROP AND EAST CENTRAL TRAVIS COUNTIES...

AT 950 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO 
DETECT SHOWERS AND THUNDERSTORMS PRODUCING RAINFALL RATES OF AROUND 
2 INCHES PER HOUR NEAR WEBBERVILLE. DURING THE PAST HOUR THE TEXAS
DEPARTMENT OF PUBLIC SAFETY REPORTED FLOODING ON FARM TO MARKET ROAD 
969 NEAR WEBBERVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3027 9741 3018 9745 3019 9754 3031 9751
      3029 9744

$$
218 
WGUS74 KEWX 101651
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1151 AM CDT TUE JUL 10 2012

TXC021-453-101700-
/O.CON.KEWX.FF.W.0042.000000T0000Z-120710T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TRAVIS TX-BASTROP TX-
1151 AM CDT TUE JUL 10 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL NOON CDT FOR
NORTHWESTERN BASTROP AND EAST CENTRAL TRAVIS COUNTIES...

AT 1150 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED SHOWERS 
AND THUNDERSTORMS HAVE DIMINISHED OVER THE WARNED AREA AND THE FLASH 
FLOOD WARNING ISSUED EARLIER UNTIL NOON WILL BE ALLOWED TO EXPIRE.

SOME AREAS MAY STILL BE EXPERIENCING SOME MINOR TO MODERATE FLOODING 
AS WATERS CONTINUE TO RECEDE. MOTORISTS ARE URGED TO CONTINUE TO 
PROCEED WITH CAUTION AND DO NOT DRIVE INTO FLOODED ROADWAYS OR 
THROUGH BARRICADES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3027 9741 3018 9745 3019 9754 3031 9751
      3029 9744

$$

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, 7:06 AM CDTFlash Flood WarningEWXBastrop, Travis114 min
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.