Alert archive / Texas / Flash Flood Warnings in 2003

Flash Flood Warning 7, NWS Brownsville, TX

July 2, 2003Zapata County, Texas

NWS Brownsville, TX issued this flash flood warning at Jul 2, 2003, 7:25 PM CDT for Zapata County, Texas. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 2, 2003, 7:25 PM CDT (00:25 UTC)
Expired: Jul 2, 2003, 9:30 PM CDT
In force: 2 hr
Issued by: NWS Brownsville, TX
Area: Counties, with a storm outline in the text

County Zapata County, TX

The radar

The Brownsville radar (KBRO), 189 km from the middle of the area, began a volume at 00:27 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

Brownsville Intl, TX (KBRO), launched 00:00Z, 0.4 hours before the alert went out and 192 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: 1727 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 979 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 17 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KBRO 030027
FFWBRO
TXC505-030230-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
725 PM CDT WED JUL 2 2003

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

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

* UNTIL 930 PM CDT

* AT 725 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS SOUTHERN ZAPATA      
  COUNTY. DOPPLER RADAR ESTIMATED THAT FROM 2 TO 4 INCHES OF RAIN    
  HAVE FALLEN OVER SOUTHERN ZAPATA COUNTY SINCE 630 PM. THESE        
  THUNDERSTORMS ARE MOVING NORTHEAST AT 5 TO 10 MPH.  

FLOODING IS OCCURRING OR IS IMMINENT IN SOUTHERN ZAPATA COUNTY. IT 
IS IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR 
CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS 
SHOULD AVOID STREAMS OR CREEKS.

LAT...LON 2680 9897 2670 9902 2657 9917 2681 9927

$$

SPEECE

1 follow-up statement

000 
WGUS74 KBRO 030202
FFSBRO
TXC505-030230-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
900 PM CDT WED JUL 2 2003

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHERN ZAPATA
COUNTY HAS BEEN CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LIGHT TO MODERATE SHOWERS AND THUNDERSTORMS WILL CONTINUE OVER 
SOUTHERN ZAPATA COUNTY THROUGH 1000 PM...BUT WILL GRADUALLY 
DISSIPATE BY MIDNIGHT.

LAT...LON 2680 9897 2670 9903 2657 9917 2680 9927

$$

SPEECE

Nearby

Flash Flood Warnings in Texas, 2003 Every flash flood warning in 2003

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.