Flash Flood Warning 12, NWS Brownsville, TX

Issued

Aug 31, 2001, 10:03 AM CDT (15:03 UTC)

Expired

Aug 31, 2001, 1:00 PM CDT

In force

3 hr

Issued by

NWS Brownsville, TX

Area

Whole counties

County Jim Hogg County, TX

The Corpus Christi radar (KCRP), 143 km from the middle of the area, began a volume at 15:05 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.

000 
WGUS54 KBRO 311503
FFWBRO
FFWBRO
TXC247-311800-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1003 AM CDT FRI AUG 31 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN JIM HOGG COUNTY IN DEEP SOUTH TEXAS

* UNTIL 100 PM CDT

* AT 950 AM CDT...LAW ENFORCEMENT OFFICIALS FROM JIM HOGG COUNTY 
REPORTED FLASH FLOODING ON HIGHWAY 16 ABOUT 2 MILES NORTH OF 
HEBBRONVILLE.  EXCESSIVE RUNOFF FROM THUNDERSTORMS OVERNIGHT ACROSS 
DUVAL COUNTY WAS CAUSING THIS FLASH FLOODING.  OVERNIGHT RAINFALL 
TOTALS OF 4 TO 6 INCHES WERE REPORTED ACROSS SOUTHERN DUVALL 
COUNTY.  

* SLOW MOVING THUNDERSTORMS ACROSS DUVALL COUNTY WERE PRODUCING 
TORRENTIAL RAINFALL AND RUNOFF INTO MESQUITE AND PALO BLANCO CREEKS 
OF JIM HOGG COUNTIES.  RUNOFF FROM THIS EXCESSIVE RAINFALL WILL 
CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE 
FLASH FLOODING INCLUDE...AREAS NEAR HEBBRONVILLE AND NORTHERN JIM 
HOGG COUNTIES.

IF YOU ENCOUNTER A FLOODED ROAD...TURN AROUND AND FIND AN ALTERNATE
ROUTE.  REMEMBER...FLASH FLOODING CLAIM MORE LIVES THAN ANY OTHER 
WEATHER RELATED PHENOMENA.

NWS Brownsville, TX wrote its last area forecast discussion before this flash flood warning went out at Aug 31, 9:43 AM CDT, 20 minutes earlier.

DEEP SOUTH TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BROWNSVILLE TX
943 AM CDT FRI AUG 31 2001

WILL CONTINUE CHANCE POPS FOR THUNDERSTORMS WITH HEAVY RAIN
ESPECIALLY ACROSS THE UPPER VALLEY.  AT 14Z...A WEAK SFC LOW CONTINUED OVER
THE UPPER VALLEY THIS MORNING.  THE 00Z AVN RUN SEEMED TO PICK UP
THIS FEATURE QUITE WELL WHILE THE ETA DID NOT.  THE AVN PROGS THIS
SFC LOW TO REMAIN NEARY STATIONARY THROUGH THIS AFTERNOON ACROSS THE
UPPER VALLEY.  THIS LOW WILL CONTINUE TO ACT AS A FOCUSING MECHANISM
FOR HEAVY RAIN THIS AFTERNOON ESPECIALLY ACROSS JIM HOGG...ZAPATA...
BROOKS...AND KENEDY COUNTIES.  A HIGH PRECIPITABLE WATER VALUE OR
PWAT OF 2.22 INCHES WAS NOTED ON THE 12Z BRO SOUNDING.  WATER VAPOR
IMAGERY ALSO INDICATED DRIER MID AND UPPER FLOW WITH EMBEDDED AREAS
OF PVA APPROACHING THE VALLEY.  IN ADDITION...BOTH AVN AND ETA PROG
HEIGHT FALLS AND A DEEPENING WEAK UPPER TROF OVER THE VALLEY INTO
THE LATE AFTERNOON.  THE COMBINATION OF AFTERNOON HEATING...HIGH
PWAT...DEEPENING UPPER TROF...AND THE SURFACE LOW COULD COMBINE TO
PRODUCE LOCALLY HEAVY RAIN ESPECIALLY ACROSS THE NORTHERN ZONES THIS
AFTERNOON.

MARINE...SEAS 6 FEET OFFSHORE WITH SE WINDS NEAR 16 KNOTS. THESE
MODERATE SOUTHEAST WINDS WILL PREVAIL...AND WILL GO AHEAD AND ADD
MENTION OF SCEC.  PERSISTENT WEAKNESS IN THE SUBTROPICAL RIDGE IN
COMBINATION OF A SHORT WAVE TROUGH OVER CENTRAL TX...WILL ALLOW
ISOLATED TO SCATTERED CONVECTION TO DEVELOP THROUGH THIS AFTERNOON
AND WEEKEND.

GUERRERO AND MARTINEZ

.BRO...NONE.

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

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.