Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 21, NWS Brownsville, TX

September 11, 2002Brooks County, Hidalgo County, Texas

NWS Brownsville, TX issued this flash flood warning at Sep 11, 2002, 12:51 PM CDT for Brooks County, Hidalgo County, Texas. It was in force for 3 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: Sep 11, 2002, 12:51 PM CDT (17:51 UTC)
Expired: Sep 11, 2002, 3:45 PM CDT
In force: 3 hr
Issued by: NWS Brownsville, TX
Area: Counties, with a storm outline in the text

Counties Brooks County, TX, Hidalgo County, TX

The radar

The Brownsville radar (KBRO), 108 km from the middle of the area, began a volume at 17:50 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, 5.9 hours before the alert went out and 110 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: 1804 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 557 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 24 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KBRO 111751
FFWBRO
TXC047-215-112045-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1250 PM CDT WED SEP 11 2002

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

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

* UNTIL 345 PM CDT

* AT 1250 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR IN         
  BROWNSVILLE INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL ALONG 
  A LINE EXTENDING FROM 8 MILES NORTHEAST OF MCCOOK TO 9 MILES SOUTH 
  OF ENCINO...MOVING WEST AT 25 MPH. DOPPLER RADAR ESTIMATED THAT    
  FROM TWO TO THREE INCHES OF RAIN HAVE FALLEN WITHIN THE WARNING    
  AREA OVER THE LAST THREE HOURS.  THESE HEAVY RAINS ARE FALLING     
  OVER LAND THAT HAS BEEN SATURATED FROM RAINFALL OVER THE LAST      
  SEVERAL DAYS.  ANY ADDITIONAL RAINS THAT OCCUR WILL QUICKLY        
  PRODUCE FLASH FLOODING OF LOW LYING AREAS WITHIN THE WARNED 
  AREA.    

* SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...SAN   
  MANUEL AND MCCOOK.

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. 

LAT...LON 2643 9801 2690 9800 2689 9831 2645 9846

$$

SPEECE

1 follow-up statement

000 
WGUS74 KBRO 111941
FFSBRO
TXC047-215-112045-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
240 PM CDT WED SEP 11 2002

...THE FLASH FLOOD WARNING WHICH WAS IN EFFECT UNTIL 345 PM CDT FOR 
SOUTHEASTERN BROOKS AND NORTHERN HIDALGO COUNTY HAS BEEN 
CANCELLED... 

DOPPLER RADAR IN BROWNSVILLE SHOWS THAT THE HEAVY RAINS HAVE 
WEAKENED OVER THE WARNED AREA. STREAMS AND CREEKS IN THE WARNED AREA 
HAVE RECEDED OR WERE BEGINNING TO RECEDE...ENDING THE FLASH FLOODING 
THREAT. EVEN THOUGH STREAM AND CREEK LEVELS ARE NOW FALLING...SOME 
ROADWAYS MAY STILL BE COVERED WITH WATER. MOTORISTS ARE ADVISED TO 
AVOID DRIVING THROUGH FLOODED ROADWAYS.

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. 

$$

SPEECE

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 11, 11:32 AM CDT	Flash Flood Warning	BRO	Kenedy, Willacy	3 hr
Sep 11, 12:24 PM CDT	Flash Flood Warning	BRO	Kenedy, Willacy	111 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.