Alert archive / Texas / Flash Flood Warnings in 2012

Flash Flood Warning 6, NWS Brownsville, TX

May 12, 2012Zapata County, Texas

NWS Brownsville, TX issued this flash flood warning at May 12, 2012, 2:28 AM CDT for Zapata County, Texas. It was in force for 92 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: May 12, 2012, 2:28 AM CDT (07:28 UTC)
Expired: May 12, 2012, 4:00 AM CDT
In force: 92 min
Issued by: NWS Brownsville, TX
Area: Storm-based polygon
Flood severity: None

County Zapata County, TX

The radar

The Corpus Christi radar (KCRP), 195 km from the middle of the area, began a volume at 07:30 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 00:00Z, 7.5 hours before the alert went out and 209 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: 2310 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 792 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 20 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

385 
WGUS54 KBRO 120728
FFWBRO
TXC505-120900-
/O.NEW.KBRO.FF.W.0006.120512T0728Z-120512T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
228 AM CDT SAT MAY 12 2012

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN ZAPATA COUNTY IN DEEP SOUTH TEXAS...

* UNTIL 400 AM CDT

* AT 227 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS INDICATED
  TORRENTIAL RAIN OF 4 TO 6 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...ESCOBAS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS TO RISE.

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 2708 9944 2715 9945 2716 9943 2719 9943
      2722 9945 2725 9945 2727 9946 2732 9937
      2728 9933 2727 9896 2706 9896 2705 9945
      2707 9946

$$

TOMASELLI

1 follow-up statement

611 
WGUS74 KBRO 120819
FFSBRO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
319 AM CDT SAT MAY 12 2012

TXC505-120900-
/O.CON.KBRO.FF.W.0006.000000T0000Z-120512T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ZAPATA TX-
319 AM CDT SAT MAY 12 2012

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHERN ZAPATA COUNTY
UNTIL 400 AM CDT...

AT 318 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS INDICATED 
TORRENTIAL RAIN OF 4 TO 6 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...ESCOBAS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS TO RISE.

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 2708 9944 2715 9945 2716 9943 2719 9943
      2722 9945 2725 9945 2727 9946 2732 9937
      2728 9933 2727 9896 2706 9896 2705 9945
      2707 9946

$$

TOMASELLI

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 7:06 PM CDT	Severe Thunderstorm Warning	BRO	Brooks	39 min
May 11, 10:50 PM CDT	Areal Flood Advisory	BRO	Zapata	55 min
May 12, 1:42 AM CDT	Areal Flood Advisory	BRO	Zapata	63 min
May 12, 2:13 AM CDT	Severe Thunderstorm Warning	BRO	Zapata	62 min
May 12, 3:12 AM CDT	Severe Thunderstorm Warning	BRO	Zapata	63 min
May 12, 3:58 AM CDT	Flash Flood Warning	BRO	Zapata	92 min
May 12, 4:03 PM CDT	Severe Thunderstorm Warning	BRO	Willacy	42 min
May 12, 4:50 PM CDT	Severe Thunderstorm Warning	BRO	Willacy	40 min
May 12, 4:57 PM CDT	Areal Flood Advisory	BRO	Willacy	63 min
May 12, 5:20 PM CDT	Severe Thunderstorm Warning	BRO	Cameron	25 min
May 12, 5:24 PM CDT	Areal Flood Advisory	BRO	Cameron, Hidalgo, Willacy	66 min
May 12, 5:43 PM CDT	Severe Thunderstorm Warning	BRO	Cameron	32 min

Nearby

Flash Flood Warnings in Texas, 2012 Every 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.