Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 48, NWS Brownsville, TX

November 2, 2002Cameron County, Willacy County, Texas

NWS Brownsville, TX issued this flash flood warning at Nov 2, 2002, 9:05 AM CST for Cameron County, Willacy 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: Nov 2, 2002, 9:05 AM CST (15:05 UTC)
Expired: Nov 2, 2002, 12:00 PM CST
In force: 3 hr
Issued by: NWS Brownsville, TX
Area: Counties, with a storm outline in the text

Counties Cameron County, TX, Willacy County, TX

The radar

The Brownsville radar (KBRO), 52 km from the middle of the area, began a volume at 15:09 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, 3.1 hours before the alert went out and 54 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: 318 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 594 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KBRO 021505
FFWBRO
TXC061-489-021800-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
858 AM CST SAT NOV 2 2002

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

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

* UNTIL NOON CST

* AT 857 AM CST...THUNDERSTORMS WITH VERY HEAVY RAINFALL CONTINUED
  ALONG COASTAL CAMERON AND WILLACY COUNTIES. DOPPLER RADAR
  ESTIMATES UP TO 3 INCHES OF RAIN HAS FALLEN DURING THE PAST 3
  HOURS NEAR THE LAGUNA MADRE. THIS INCLUDES THE PORT ISABEL AND
  HARLINGEN AREAS. RAINFALL OF LESSER INTENSITY WAS AFFECTING
  WESTERN CAMERON COUNTY...BUT RAINFALL HEAVY ENOUGH TO AGGRAVATE
  FLOODING WAS CONTINUING IN THE BROWNSVILLE AREA AS WELL.

* 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...PORT MANSFIELD...RAYMONDVILLE...RIO HONDO...LOS
  FRESNOS...LAGUNA VISTA AND LAGUNA HEIGHTS.

LAT...LON 2659 9729 2658 9794 2650 9794 2649 9785
          2609 9784 2589 9745 2612 9717

$$

MCELROY

1 follow-up statement

000 
WGUS74 KBRO 021756
FFSBRO
TXC061-489-021955-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1155 AM CST SAT NOV 2 2002

...THE FLASH FLOOD WARNING WHICH WAS IN EFFECT UNTIL NOON CST WILL 
BE ALLOWED TO EXPIRE...

THE HEAVY RAIN HAS ENDED OVER THE WARNED AREA...WITH SOME MODERATE 
RAINS LINGERING ALONG THE COAST NEAR PADRE ISLAND. EVEN THOUGH 
STREAM AND CREEK LEVELS MAY NOW BE FALLING...SOME ROADWAYS MAY STILL 
BE COVERED WITH WATER. MOTORISTS ARE ADVISED TO AVOID DRIVING 
THROUGH FLOODED ROADWAYS.

AT 1155 AM CST...THE HEAVIEST SHOWERS AND THUNDERSTORMS HAD MOVED 
OVER THE COASTAL WATERS EAST OF CAMERON AND WILLACY COUNTIES...AND 
WERE LOCATED 10 TO 15 MILES OFFSHORE.

A FLASH FLOOD WATCH WILL REMAIN IN EFFECT THROUGH 400 PM THIS 
AFTERNOON. ADDITIONAL RAINFALL MAY DEVELOP LATER THIS AFTERNOON...SO 
CONTINUE MONITORING THE LATEST WATCHES AND WARNINGS.

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 2667 9726 2655 9752 2585 9714 2598 9691

$$

MCELROY

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 2, 5:56 AM CST	Flash Flood Warning	BRO	Cameron	3 hr
Nov 2, 7:04 AM CST	Flash Flood Warning	BRO	Willacy	116 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.