Alert archive / Texas / Flash Flood Warnings in 2001

Flash Flood Warning 16, NWS Brownsville, TX

September 4, 2001Hidalgo County, Starr County, Texas

NWS Brownsville, TX issued this flash flood warning at Sep 4, 2001, 4:10 PM CDT for Hidalgo County, Starr 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 the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Sep 4, 2001, 4:10 PM CDT (21:10 UTC)
Expired: Sep 4, 2001, 7:00 PM CDT
In force: 3 hr
Issued by: NWS Brownsville, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Hidalgo County, TX, Starr County, TX

The nearest sounding before it

Brownsville Intl, TX (KBRO), launched 12:00Z, 9.2 hours before the alert went out and 136 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: 2089 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 771 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 47 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 042111
FFWBRO
TXC215-427-050000-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
410 PM CDT TUE SEP 4 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 700 PM CDT

* AT 410 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THUNDERSTORMS WITH VERY HEAVY RAINFALL 18 MILES NORTH OF           
  SULLIVAN CITY...OR 21 MILES NORTHEAST OF RIO GRANDE CITY...MOVING  
  EAST AT 5 TO 10 MPH. DOPPLER RADAR HAS ESTIMATED 2 TO 3 INCHES OF  
  RAIN HAS FALLEN OVER FAR EASTERN STARR COUNTY.  MUCH OF THIS RAIN  
  WILL RUN-OFF AND POSSIBLY FLODD AREAS OF FAR SOUTHWESTERN HIDALGO    
  COUNTY...INCLUDING THE TOWNS OF SULLIVAN CITY AND LA JOYA 

* SLOW MOVING THUNDERSTORMS ARE PRODUCING TORRENTIAL RAINFALL IN THE
  WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE
  FLASH FLOODING TO OCCUR. 

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.

A FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH TONIGHT.

LAT...LON 2677 9860 2637 9879 2622 9841 2672 9831

YURA

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Brownsville, TX wrote its last area forecast discussion before this flash flood warning went out at Sep 4, 4:05 PM CDT, 5 minutes earlier.

Area forecast discussion, Sep 4, 4:05 PM CDT, 5 minutes before

DEEP SOUTH TEXAS FORECAST DISCUSSION...AMENDMENT TO CCF
NATIONAL WEATHER SERVICE BROWNSVILLE TX
405 PM CDT TUE SEP 4 2001

SHORT TERM...CONVECTION DEVELOPING ALONG OUTFLOW BOUNDARY OVER
NORTHWEST PORTIONS OF DEEP SOUTH TEXAS THIS AFTERNOON. WATER VAPOR
IMAGES AND RUC GUIDANCE CONTINUES TO INDICATE VORT MAX MOVING DOWN
THE RIO GRANDE INTO WESTERN PORTIONS OF THE CWA. UNSTABLE LIFTING
INDEXES AND CAPE VALUES INDICATE POTENTIAL FOR ADDITIONAL
DEVELOPMENT AS LINE OF CONVECTION CONTINUES TO DEVELOP THIS
AFTERNOON. IN ADDITION...LEFT ENTRANCE OF UPPER LEVEL JET OVER
SOUTHWEST UNITED STATES PROVIDING SOME DIFFLUENCE ALOFT. SOME
DIRECTIONAL SHEAR AND VEERING WITH HEIGHT EVEN THOUGH 700MB WINDS A
LITTLE OUT OF PHASE. DRIER AIR AT 700MB TO PROVIDE MARGINAL WIND AND
HAIL THREAT. GREATEST THREAT REMAINS HEAVY RAINFALL AND FLOODING
POTENTIAL WITH SLOW MOVEMENT OF CONVECTION. WILL EXTEND FLASH FLOOD
WATCH FOR ENTIRE CWA. UPPER LEVEL LOW OVER NORTH TEXAS TO MOVE
LITTLE WEDNESDAY AND OPENS UP AS SHORT WAVE THURSDAY. BELIEVE
GREATEST THREAT OF WIDESPREAD RAIN TONIGHT INTO WEDNESDAY
MORNING...WITH A DECREASING CHANCE OF SHOWERS AND TSTMS THURSDAY AS
DRYING IN THE MID TO UPPER LEVELS MOVES INTO DEEP SOUTH
TX.

EXTENDED...A CHANGE IN THE PATTERN AS UPPER LOW/TROUGH DROPS INTO
THE CENTRAL ROCKY MOUNTAINS FRIDAY NORTH OF FOUR CORNERS REGION.
SURFACE LOW PRESSURE TO DEVELOP OVER WEST TEXAS WITH PRESSURE
GRADIENT INCREASING OVER SOUTH TX SATURDAY. BULK OF PRECIP TO BE FAR
TO THE NORTH WHERE DYNAMICS LOCATED WITH UPPER LOW POISED JUST
NORTHWEST OF TX PANHANDLE SUNDAY. LACK OF A SURFACE BOUNDARY FOR
CONVERGENCE WILL LIMIT RAIN CHANCES THROUGH THE PERIOD.

MARINE...SEAS 3 FEET OFFSHORE WITH SOUTH WINDS NEAR 15 KNOTS. NO
CONVECTION OFFSHORE BUT LINE OF CONVECTION REACHING NORTHEAST
PORTIONS OF DEEP SOUTH TX TO REACH NORTHERN PORTIONS OF COASTAL
WATERS LATER THIS AFTERNOON. CONVECTIVE TRENDS SHOULD DIMINISH AS
THE UPPER LOW OVER TX LIFTS OUT AND A TROUGH MOVES INTO THE FOUR
CORNERS REGION OF THE U.S. TOWARDS THE END OF THE WEEK. LOW PRESSURE
DEVELOPING OVER WEST TEXAS WILL INCREASE THE PRESSURE GRADIENT OVER
THE LOWER TX COAST FRIDAY.

PRELIMINARY NUMBERS...
BRO TB 077/094 076/094 077 65432
HRL TB 076/095 075/095 076 65432
MFE TB 077/096 076/096 077 65432
RGC TB 076/098 075/098 076 65432
SPI TB 078/088 077/088 078 65432

AVIATION-MARINE-MESO...YURA.69/SYNOPTIC-PUBLIC...CASTILLO.61
MESO...MCGUIRE.55
SWC...CAMPBELL

.BRO...FFA TXZ248>257.

In the hours before

Local storm report, Sep 4, 11:40 AM CDT, 4 hours 30 minutes before

PRELIMINARY LOCAL STORM REPORT...UPDATED DELAYED REPORTS...
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1140 AM CDT TUE SEP 4 2001

....SEVERE WEATHER REPORT FOR AUGUST 31...

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0925 PM     4 N LA JOYA              TX    WIND DAMAGE
08/31/01    HIDALGO                        NWS STORM SURVEY REPORTED
                                           STRAIGHT LINE WINDS ROLLED
                                           AND CRUSHED 3 RECREATIONAL
                                           VEHICLES AND ONE MOBILE HOME.
                                           ONE SMALL WOOD FRAME HOUSE WAS
                                           KNOCKED OFF ITS BLOCK FOUNDATION.
                                           THE WINDS WERE ESTIMATED TO
                                           BE AROUND 85 MPH.

Nearby

Flash Flood Warnings in Texas, 2001 Every flash flood warning in 2001

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.