Alert archive / Texas / Flash Flood Warnings in 2012

Flash Flood Warning 11, NWS Brownsville, TX

June 30, 2012Zapata County, Texas

NWS Brownsville, TX issued this flash flood warning at Jun 30, 2012, 5:40 PM CDT for Zapata County, Texas. It was in force for 110 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
Jun 30, 2012, 5:40 PM CDT (22:40 UTC)
Expired
Jun 30, 2012, 7:30 PM CDT
In force
110 min
Issued by
NWS Brownsville, TX
Area
Storm-based polygon
Flood severity
None

County Zapata County, TX

The radar

The Corpus Christi radar (KCRP), 201 km from the middle of the area, began a volume at 22:43 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, 10.7 hours before the alert went out and 215 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 2012-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4404 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 2012-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -21 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
4404 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
512 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-21 m²/s²
0-3 km storm-relative helicity
-17 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.

401 
WGUS54 KBRO 302240
FFWBRO
TXC505-010030-
/O.NEW.KBRO.FF.W.0011.120630T2240Z-120701T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
540 PM CDT SAT JUN 30 2012

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN ZAPATA COUNTY IN DEEP SOUTH TEXAS...
  THIS INCLUDES THE CITY OF SAN YGNACIO.

* UNTIL 730 PM CDT

* AT 539 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH   
FLOODING WAS OCCURRING IN NORTHWESTERN ZAPATA COUNTY NORTH OF SAN 
YGNACIO. OFFICIALS REPORT WATER AND MUD IS CROSSING HIGHWAY 83. 
RADAR ESTIMATES 4 TO 5 INCHES OF RAIN HAS FALLEN THIS 
AFTERNOON...AND ADDITIONAL HEAVY RAIN IS EXPECTED WITH TWO TO THREE 
INCHES OF RAIN POSSIBLE.

* FLASH FLOODING IS EXPECTED TO OCCUR OVER MAINLY RURAL AREAS OF   
NORTHWESTERN ZAPATA COUNTY...INCLUDING THE TOWN OF SAN YGNACIO AND 
HIGHWAY 83.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2707 9945 2708 9944 2715 9945 2716 9943
      2727 9946 2732 9937 2728 9933 2727 9918
      2693 9933 2695 9940 2698 9939 2701 9942
      2702 9945 2705 9946

$$

JGG
1 follow-up statement
019 
WGUS74 KBRO 010024
FFSBRO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
724 PM CDT SAT JUN 30 2012

TXC505-010039-
/O.EXP.KBRO.FF.W.0011.000000T0000Z-120701T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ZAPATA TX-
724 PM CDT SAT JUN 30 2012

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHWESTERN ZAPATA
COUNTY WILL BE ALLOWED TO EXPIRE AT 730 PM CDT...

LAW ENFORCEMENT REPORTS THAT WATER AND MUD THAT HAD BEEN FLOWING 
OVER HIGHWAY 83 HAS ENDED. MODERATE RAINFALL WILL CONTINUE IN THE 
AREA THROUGH EARLY EVENING. A FLOOD ADVISORY FOR MINOR FLOODING OF 
SMALL CREEKS AND STREAMS WILL BE ISSUED SHORTLY FOR MUCH OF ZAPATA 
COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2707 9945 2708 9944 2715 9945 2716 9943
      2727 9946 2732 9937 2728 9933 2727 9918
      2693 9933 2695 9940 2698 9939 2701 9942
      2702 9945 2705 9946

$$

JGG

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 10:00 PM CDTSmall Craft Advisory for WindsBRO6 hr
Jun 30, 11:48 AM CDTSpecial Marine WarningBRO57 min
Jun 30, 12:42 PM CDTSpecial Marine WarningBRO48 min
Jun 30, 2:09 PM CDTAreal Flood AdvisoryBROCameron66 min
Jun 30, 2:26 PM CDTAreal Flood AdvisoryBROCameron, Hidalgo94 min
Jun 30, 2:50 PM CDTFlash Flood WarningBROZapata100 min
Jun 30, 3:51 PM CDTAreal Flood AdvisoryBROCameron84 min
Jun 30, 3:54 PM CDTSevere Thunderstorm WarningBROZapata22 min
Jun 30, 4:22 PM CDTAreal Flood AdvisoryBROStarr, Zapata113 min
Jun 30, 4:37 PM CDTFlash Flood WarningBROCameron3 hr
Jun 30, 5:03 PM CDTFlash Flood WarningBROStarr, Zapata87 min
Jun 30, 6:26 PM CDTFlash Flood WarningBROStarr, Zapata2 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.