Alert archive / Texas / Flash Flood Warnings in 2007

Flash Flood Warning 39, NWS Brownsville, TX

June 30, 20074 counties in Texas

NWS Brownsville, TX issued this flash flood warning at Jun 30, 2007, 5:21 PM CDT for 4 counties in Texas. It was in force for 84 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jun 30, 2007, 5:21 PM CDT (22:21 UTC)
Expired
Jun 30, 2007, 6:45 PM CDT
In force
84 min
Issued by
NWS Brownsville, TX
Area
Whole counties

Counties Brooks County, TX, Hidalgo County, TX, Jim Hogg County, TX, Starr County, TX

The radar

The Brownsville radar (KBRO), 140 km from the middle of the area, began a volume at 22:23 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

TimeReportWhereRemark
Jun 30, 5:45 PM CDTFLASH FLOODMcallen, TXSKYWARN SPOTTER REPORTED STREET FLOODING IN NORTH MCALLEN ON WARE ROAD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brownsville Intl, TX (KBRO), launched 12:00Z, 10.4 hours before the alert went out and 142 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, Brownsville Intl, TX at 12:00Z on 2007-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2582 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, Brownsville Intl, TX at 12:00Z on 2007-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -61 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
2582 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
577 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-61 m²/s²
0-3 km storm-relative helicity
-8 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.

000 
WGUS54 KBRO 302222
FFWBRO
TXC047-215-247-427-302345-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
521 PM CDT SAT JUN 30 2007

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN BROOKS COUNTY IN DEEP SOUTH TEXAS...
  NORTHWESTERN HIDALGO COUNTY IN DEEP SOUTH TEXAS...
  THIS INCLUDES THE CITY OF MCCOOK...
  EXTREME SOUTHEASTERN JIM HOGG COUNTY IN DEEP SOUTH TEXAS...
  NORTHEASTERN STARR COUNTY IN DEEP SOUTH TEXAS...

* UNTIL 645 PM CDT

* AT 517 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA. THESE     
  THUNDERSTORMS ARE MOVING TO THE NORTH AROUND 20 MPH.

* THE STORM PRODUCING FLASH FLOODING WILL OTHERWISE REMAIN OVER
  MAINLY RURAL AREAS OF THE INDICATED COUNTIES.

THESE THUNDERSTORMS HAVE BEEN REDEVELOPING TO THE SOUTH...WITH 
CONTINUED RAINFALL EXPECTED IN THESE REGION.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

LAT...LON 2641 9831 2650 9858 2703 9843 2701 9816

$$

JS
1 follow-up statement
000 
WGUS74 KBRO 302344
FFSBRO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
640 PM CDT SAT JUN 30 2007

TXC047-215-247-427-302350-
JIM HOGG TX-BROOKS TX-STARR TX-HIDALGO TX-
640 PM CDT SAT JUN 30 2007

...THE FLASH FLOOD WARNING WILL EXPIRE AT 645 PM CDT FOR NORTHWESTERN
HIDALGO...NORTHEASTERN STARR...SOUTHWESTERN BROOKS AND EXTREME
SOUTHEASTERN JIM HOGG COUNTIES...

THUNDERSTORM ACTIVITY IN THESE REGIONS IS DECREASING IN 
INTENSITY...WITH FLASH FLOODING CURRENTLY NO LONGER A THREAT. THUS 
THIS FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE AT 645.

THE FLASH FLOOD WARNING FOR CENTRAL HIDALGO COUNTY REMAINS IN EFFECT 
THROUGH 800 PM.

LAT...LON 2641 9831 2650 9858 2703 9843 2701 9816

$$

JS

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 9:29 PM CDTFlash Flood WarningBROZapata61 min
Jun 30, 5:57 PM CDTFlash Flood WarningBROHidalgo2 hr

Nearby

Flash Flood Warnings in Texas, 2007Every flash flood warning in 2007

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.