Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 15, NWS Brownsville, TX

September 9, 2002Hidalgo County, Texas

NWS Brownsville, TX issued this flash flood warning at Sep 9, 2002, 4:21 PM CDT for Hidalgo County, Texas. It was in force for 114 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 9, 2002, 4:21 PM CDT (21:21 UTC)
Expired
Sep 9, 2002, 6:15 PM CDT
In force
114 min
Issued by
NWS Brownsville, TX
Area
Counties, with a storm outline in the text

County Hidalgo County, TX

The radar

The Brownsville radar (KBRO), 74 km from the middle of the area, began a volume at 21:21 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 12:00Z, 9.4 hours before the alert went out and 77 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 2002-09-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 510 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, Brownsville Intl, TX at 12:00Z on 2002-09-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -60 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
510 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
685 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
-60 m²/s²
0-3 km storm-relative helicity
-35 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 092121
FFWBRO
TXC215-092315-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
420 PM CDT MON SEP 9 2002

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN HIDALGO COUNTY IN DEEP SOUTH TEXAS

* UNTIL 615 PM CDT

* AT 420 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  STRONG THUNDERSTORMS WITH VERY HEAVY RAINFALL ALONG A LINE         
  EXTENDING FROM EDINBURG TO HIDALGO IN HIDALGO COUNTY.  THESE       
  STORMS WERE NEARLY STATIONARY. DOPPLER RADAR ESTIMATED THAT FROM 3 
  TO 5 INCHES OF RAIN HAVE FALLEN OVER SOUTHEASTERN HIDALGO COUNTY   
  DURING THE PAST HOUR.  

* SLOW MOVING 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 FLASH
  FLOODING INCLUDE...WESLACO...SAN JUAN...PHARR...MERCEDES...EDINBURG
  AND DONNA.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS
THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

LAT...LON 2631 9822 2608 9825 2604 9788 2627 9788

$$

SPEECE
1 follow-up statement
000 
WGUS74 KBRO 092236
FFSBRO
TXC215-092315-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
530 PM CDT MON SEP 9 2002

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT UNTIL UNTIL 615 PM
FOR SOUTHEASTERN HIDALGO COUNTY HAS BEEN CANCELLED...

AT 530 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR IN
BROWNSVILLE INDICATED THAT THE HEAVY RAIN PRODUCING THUNDERSTORMS
OVER SOUTHEASTERN HIDALGO COUNTY HAVE MOVED TO THE SOUTH AND EAST
OUT OF THE COUNTY.  ACCORDINGLY...THE FLASH FLOOD WARNING FOR
SOUTHEASTERN HIDALGO COUNTY HAS BEEN CANCELLED.

HOWEVER...A FLASH FLOOD WATCH REMAINS IN EFFECT FOR ALL OF DEEP
SOUTH TEXAS UNTIL TUESDAY MORNING.

$$

SPEECE

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 8, 8:36 PM CDTSpecial Marine WarningBRO114 min
Sep 8, 8:36 PM CDTSpecial Marine WarningBRO114 min
Sep 8, 9:32 PM CDTSevere Thunderstorm WarningBROBrooks58 min
Sep 9, 2:42 AM CDTSevere Thunderstorm WarningBROHidalgo, Kenedy, Willacy48 min
Sep 9, 2:51 PM CDTFlash Flood WarningBROKenedy3 hr
Sep 9, 3:58 PM CDTFlash Flood WarningBROKenedy107 min
Sep 9, 5:00 PM CDTSpecial Marine WarningBRO3 hr
Sep 9, 5:33 PM CDTSevere Thunderstorm WarningBROCameron42 min
Sep 9, 5:52 PM CDTFlash Flood WarningBROCameron113 min

Nearby

Flash Flood Warnings in Texas, 2002Every flash flood warning in 2002

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.