Alert archive / Texas / Flash Flood Warnings in 2012

Flash Flood Warning 28, NWS Austin/San Antonio, TX

March 28, 2012DeWitt County, Lavaca County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Mar 28, 2012, 5:08 PM CDT for DeWitt County, Lavaca County, Texas. It was in force for 112 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
Mar 28, 2012, 5:08 PM CDT (22:08 UTC)
Expired
Mar 28, 2012, 7:00 PM CDT
In force
112 min
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon
Flood severity
None

Counties DeWitt County, TX, Lavaca County, TX

What was reported inside it

TimeReportWhereRemark
Mar 28, 5:32 PM CDTFLASH FLOOD3 Ssw Yoakum, TXFM 682 FROM YOAKUM TO US HIGHWAY 77 HAS NUMEROUS LOCATIONS WITH WATER OVER THE ROAD AND ROADWAY IS IN THE PROCESS OF CLOSING.

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, 10.1 hours before the alert went out and 160 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 2012-03-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 980 joules per kilogram.LCLEL10008507005003002001001 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 2012-03-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 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
980 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
457 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
120 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.

201 
WGUS54 KEWX 282208
FFWEWX
TXC123-285-290000-
/O.NEW.KEWX.FF.W.0028.120328T2208Z-120329T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
508 PM CDT WED MAR 28 2012

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN DEWITT COUNTY...
  SOUTHERN LAVACA COUNTY...

* UNTIL 700 PM CDT.

* AT 502 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING ACROSS THE WARNED AREA. LAW ENFORCEMENT HAS REPORTED 
  THAT WATER HAS COVERED THE ROAD ON FM 1447...5 MILES NORTH OF CUERO 
  IN DEWITT COUNTY. ADDITIONAL RAINFALL OF 2 OR MORE INCHES IS POSSIBLE
  THROUGH THIS EVENING AND WILL LIKELY CAUSE ADDITIONAL FLOODING OF 
  ROADWAYS AND LOW WATER CROSSINGS.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...CUERO...
  YOAKUM...EZZELL...SPEAKS AND THOMASTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS INCLUDES...BUT IS NOT LIMITED TO...THE FOLLOWING STREAMS 
AND DRAINAGES...
CLARKS CREEK...CHICOLETE CREEK...CUERO CREEK...SOUTH
CHICOLETE CREEK...IRISH CREEK...ARENOSA CREEK...PRICE CREEK...BIG 
BRUSHY CREEK...WILLIAMS BRANCH...TONQUA CREEK...KELLEY CREEK...MUSTANG
CREEK...BRUSHY CREEK...NAVIDAD RIVER...EAST SANDY CREEK...SAND
BRANCH...PEACH CREEK...KELLER BRANCH...CLEAR CREEK...QUEENS CREEK AND
WEST SANDY CREEK.

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

&&

LAT...LON 2906 9693 2909 9699 2895 9718 2915 9740
      2944 9693 2924 9668

$$
1 follow-up statement
519 
WGUS74 KEWX 282327
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
627 PM CDT WED MAR 28 2012

TXC123-285-290000-
/O.CON.KEWX.FF.W.0028.000000T0000Z-120329T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DEWITT TX-LAVACA TX-
627 PM CDT WED MAR 28 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR
SOUTHERN LAVACA AND EASTERN DEWITT COUNTIES...

AT 618 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLOODING ON 
NUMEROUS LOCATIONS ON FM 682 FROM YOAKUM TO US HIGHWAY 77...AND ON 
FM 1447 BETWEEN CUERO AND TERRYVILLE.  THE THUNDERSTORMS HAVE 
DECREASED RAPIDLY IN INTENSITY AND WERE MOVING OFF TO THE EAST WITH 
ADDITIONAL RAINFALL AMOUNTS OF LESS THAN ONE HALF INCH EXPECTED.  

MOTORISTS SHOULD CONTINUE TO EXERCISE EXTREME CAUTION DUE TO WATER 
OVER ROADS FROM HEAVY RAINS THAT FELL IN THE LAST SEVERAL HOURS.     

LOCATIONS IN THE WARNING AREA INCLUDE YOAKUM...SPEAKS AND EZZELL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2906 9693 2909 9699 2895 9718 2915 9740
      2944 9693 2924 9668

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 28, 4:36 PM CDTAreal Flood AdvisoryEWXDeWitt, Lavaca114 min
Mar 28, 5:55 PM CDTFlash Flood WarningEWXDeWitt, Karnes3 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.