Alert archive / Texas / Flash Flood Warnings in 2011

Flash Flood Warning 1, NWS Brownsville, TX

May 12, 2011Brooks County, Texas

NWS Brownsville, TX issued this flash flood warning at May 12, 2011, 3:17 PM CDT for Brooks County, Texas. It was in force for 63 min. 2 reports 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: May 12, 2011, 3:17 PM CDT (20:17 UTC)
Expired: May 12, 2011, 4:20 PM CDT
In force: 63 min
Issued by: NWS Brownsville, TX
Area: Storm-based polygon
Flood severity: None

County Brooks County, TX

The radar

The Corpus Christi radar (KCRP), 103 km from the middle of the area, began a volume at 20:18 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

Time	Report	Where	Remark
May 12, 3:22 PM CDT	FLASH FLOOD	Falfurrias, TX	BROOKS COUNTY SHERIFFS DEPARTMENT REPORTED 12 INCHES OF WATER ON HIGHWAY 281 SOUTH OF FM 1418.
May 12, 4:01 PM CDT	FLASH FLOOD	Falfurrias, TX	BROOKS COUNTY SHERIFFS DEPARTMENT REPORTS MULTIPLE LOCATIONS ALONG HIGHWAY 281 WITH 1.5 FEET OF WATER ON ROAD.

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, 8.3 hours before the alert went out and 111 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2980 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 458 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 2.9
Supercell composite: 13.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

819 
WGUS54 KBRO 122017
FFWBRO
TXC047-122200-
/O.NEW.KBRO.FF.W.0001.110512T2017Z-110512T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
317 PM CDT THU MAY 12 2011

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BROOKS COUNTY IN SOUTH CENTRAL TEXAS...
  THIS INCLUDES THE CITY OF FALFURRIAS.

* UNTIL 500 PM CDT

* AT 316 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS INDICATED
  TORRENTIAL RAIN OF 3 TO 4 INCHES PER HOUR FROM SLOW MOVING 
  THUNDERSTORMS WITH VERY HEAVY RAINFALL. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR.

  OTHER LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...ENCINO AND
  RACHAL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A LIFE THREATENING FLOOD! MOST FLOOD DEATHS OCCUR IN
AUTOMOBILES. STAY HOME. IF TRAVELING...DO NOT CROSS FLOODED ROADWAYS
OR STREAMS. WHEN NEARING A FLOOD AREA...TURN AROUND AND DRIVE TO
HIGHER TERRAIN.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
BROWNSVILLE.

DON'T BECOME A STATISTIC. TURN AROUND...DON'T DROWN!

&&

LAT...LON 2726 9799 2679 9799 2679 9842 2705 9842
      2727 9826

$$

TOMASELLI

1 follow-up statement

835 
WGUS74 KBRO 122120
FFSBRO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
420 PM CDT THU MAY 12 2011

TXC047-122131-
/O.CAN.KBRO.FF.W.0001.000000T0000Z-110512T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BROOKS TX-
420 PM CDT THU MAY 12 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR BROOKS COUNTY IS
CANCELLED...

NATIONAL WEATHER SERVICE DOPPLER RADAR IN BROWNSVILLE INDICATES THAT 
THE HEAVY RAINFALL THAT PROMPTED THE FLASH FLOOD WARNING FOR BROOKS 
COUNTY HAS MOVED EAST INTO KENEDY COUNTY. THEREFORE...THE FLASH FLOOD
WARNING IS CANCELLED AT THIS TIME. HOWEVER...ISOLATED LOCATIONS ALONG
HIGHWAY 281 WILL CONTINUE TO EXPERIENCE WATER ABOUT 1 FEET DEEP. 
MOTORISTS ARE URGED TO DRIVE WITH CAUTION IN THESE AREAS...AND SEEK 
ANOTHER ROUTE IF WATER COVERS THE HIGHWAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DON'T BECOME A STATISTIC. TURN AROUND...DON'T DROWN!

&&

LAT...LON 2726 9799 2679 9799 2679 9842 2705 9842
      2727 9826

$$

TOMASELLI

The office that day

Everything else NWS Brownsville, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 12, 2:34 PM CDT	Severe Thunderstorm Warning	BRO	Brooks	26 min
May 12, 2:46 PM CDT	Areal Flood Advisory	BRO	Brooks	59 min
May 12, 3:00 PM CDT	Special Marine Warning	BRO		2 hr
May 12, 3:02 PM CDT	Severe Thunderstorm Warning	BRO	Brooks, Kenedy	28 min
May 12, 3:27 PM CDT	Areal Flood Advisory	BRO	Kenedy	63 min
May 12, 3:29 PM CDT	Severe Thunderstorm Warning	BRO	Brooks, Kenedy	46 min
May 12, 3:35 PM CDT	Severe Thunderstorm Warning	BRO	Kenedy	40 min
May 12, 4:11 PM CDT	Severe Thunderstorm Warning	BRO	Kenedy	19 min
May 12, 4:25 PM CDT	Areal Flood Advisory	BRO	Kenedy	65 min
May 12, 4:30 PM CDT	Areal Flood Advisory	BRO	Willacy	60 min
May 12, 4:55 PM CDT	Special Marine Warning	BRO		2 hr
May 12, 5:07 PM CDT	Areal Flood Advisory	BRO	Hidalgo	53 min
May 12, 6:50 PM CDT	Special Marine Warning	BRO		85 min

Nearby

Flash Flood Warnings in Texas, 2011 Every flash flood warning in 2011

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.