Alert archive / Texas / Flash Flood Warnings in 2003

Flash Flood Warning 36, NWS Brownsville, TX

September 21, 2003Kenedy County, Willacy County, Texas

NWS Brownsville, TX issued this flash flood warning at Sep 21, 2003, 4:30 PM CDT for Kenedy County, Willacy County, Texas. It was in force for 90 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
Sep 21, 2003, 4:30 PM CDT (21:30 UTC)
Expired
Sep 21, 2003, 6:00 PM CDT
In force
90 min
Issued by
NWS Brownsville, TX
Area
Counties, with a storm outline in the text

Counties Kenedy County, TX, Willacy County, TX

The nearest sounding before it

Brownsville Intl, TX (KBRO), launched 12:00Z, 9.5 hours before the alert went out and 90 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 2003-09-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1577 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 2003-09-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 75 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
1577 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
569 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
75 m²/s²
0-3 km storm-relative helicity
122 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 212133
FFWBRO
TXC261-489-212300-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
430 PM CDT SUN SEP 21 2003

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

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

* UNTIL 600 PM CDT

* AT 427 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SHOWERS AND THUNDERSTORMS CONTAINING HEAVY RAINFALL MOVING INTO
  THE WARNED AREA. DOPPLER RADAR ESTIMATED RAINFALL RATES UP TO ONE
  AND ONE HALF INCHES PER HOUR WAS CURRENTLY OCCURRING WHERE THE
  RAIN WAS FALLING.

* HEAVY SHOWERS AND A FEW THUNDERSTORMS ARE PRODUCING TORRENTIAL
  RAINFALL IN THE WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL
  WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL
  EXPERIENCE FLOODING INCLUDE...RAYMONDVILLE...AND LYFORD.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE 
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS 
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. 
MOVE TO HIGHER GROUND.

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

LAT...LON 2709 9757 2641 9740 2636 9749 2635 9766
          2636 9785 2645 9786 2648 9798 2662 9793
          2664 9799 2676 9797 2701 9798

$$
1 follow-up statement
000 
WGUS74 KBRO 212259
FFSBRO
TXC261-489-212330-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
559 PM CDT SUN SEP 21 2003

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR WESTERN WILLACY AND
SOUTHERN KENEDY COUNTIES HAS BEEN ALLOWED TO EXPIRE...

RAINFALL IS DECREASING IN INTENSITY AND EXCESS RUNOFF FROM HEAVY 
RAIN HAS ENDED OVER THE WARNED AREA. IF FLOODING HAS BEEN 
OBSERVED...PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

LAT...LON 2692 9751 2664 9750 2661 9777 2635 9782
          2636 9786 2645 9787 2647 9797 2688 9798

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 21, 7:40 AM CDTFlash Flood WarningBROCameron110 min
Sep 21, 9:15 AM CDTFlash Flood WarningBROCameron, Kenedy, Willacy2 hr
Sep 21, 1:30 PM CDTFlash Flood WarningBROStarr3 hr
Sep 21, 2:42 PM CDTFlash Flood WarningBROHidalgo108 min

Nearby

Flash Flood Warnings in Texas, 2003Every 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.