Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 38, NWS Brownsville, TX

October 24, 2002Hidalgo County, Texas

NWS Brownsville, TX issued this flash flood warning at Oct 24, 2002, 6:18 PM CDT for Hidalgo County, Texas. It was in force for 117 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: Oct 24, 2002, 6:18 PM CDT (23:18 UTC)
Expired: Oct 24, 2002, 8:15 PM CDT
In force: 117 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), 87 km from the middle of the area, began a volume at 23:19 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, 11.3 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-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: 3131 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 569 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.0

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KBRO 242318
FFWBRO
TXC215-250115-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
614 PM CDT THU OCT 24 2002

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

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

* UNTIL 815 PM CDT

* AT 614 PM CDT...DOPPLER INDICATED A LINE OF THUNDERSTORMS WITH
  VERY HEAVY RAINFALL ALONG A LINE EXTENDING FROM 8 MILES SOUTHEAST
  OF SAN MANUEL TO 6 MILES NORTH OF MISSION...MOVING SOUTHEAST AT 15 
  MPH. 

* 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...SAN MANUEL...WESLACO...SAN JUAN...PHARR...
  MISSION AND MERCEDES.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. 
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. 
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE 
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS 
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY 
AUTOMOBILE. IF YOUR VEHICLE STALLS, ABANDON IT IMMEDIATELY AND SEEK 
HIGHER GROUND.

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

LAT...LON 2629 9856 2610 9821 2608 9801 2610 9788
          2626 9790 2642 9788 2646 9802 2661 9801
          2677 9802 2677 9833

$$

KNUTSVIG

1 follow-up statement

000 
WGUS74 KBRO 250113
FFSBRO
TXC215-250200-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
812 PM CDT THU OCT 24 2002

...THE FLASH FLOOD WARNING WHICH WAS IN EFFECT UNTIL 815 PM CDT FOR 
HIDALGO COUNTY WILL BE ALLOWED TO EXPIRE...

THE THUNDERSTORMS PRODUCING THE HEAVY RAIN HAVE MOVED OUT OF HIDALGO 
COUNTY. STREAMS AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE 
BEGINNING TO RECEDE...ENDING THE FLASH FLOODING THREAT. EVEN THOUGH 
STREAM AND CREEK LEVEL ARE NOW FALLING...SOME ROADWAYS MAY STILL BE 
COVERED WITH WATER. MOTORISTS ARE ADVISED TO AVOID DRIVING THROUGH 
FLOODED ROADWAYS.

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

LAT...LON 2628 9858 2678 9833 2677 9802 2660 9800
          2645 9802 2643 9789 2609 9789 2606 9805
          2615 9831 2621 9841

$$

KNUTSVIG

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 24, 4:13 PM CDT	Special Marine Warning	BRO		107 min
Oct 24, 4:13 PM CDT	Special Marine Warning	BRO		107 min
Oct 24, 5:29 PM CDT	Severe Thunderstorm Warning	BRO	Hidalgo	2 hr
Oct 24, 6:11 PM CDT	Special Marine Warning	BRO		2 hr
Oct 24, 6:11 PM CDT	Special Marine Warning	BRO		2 hr
Oct 24, 6:30 PM CDT	Severe Thunderstorm Warning	BRO	Hidalgo	67 days
Oct 24, 6:53 PM CDT	Flash Flood Warning	BRO	Kenedy	82 min

Nearby

Flash Flood Warnings in Texas, 2002 Every 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.