Flash Flood Warning 48, NWS Houston/Galveston, TX

Issued

Jun 9, 2001, 6:36 AM CDT (11:36 UTC)

Expired

Jun 9, 2001, 9:30 AM CDT

In force

3 hr

Issued by

NWS Houston/Galveston, TX

Area

Whole counties; the outline is the Mesonet’s reconstruction

Counties Brazoria County, TX, Fort Bend County, TX

The Houston radar (KHGX), 51 km from the middle of the area, began a volume at 11:38 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 KHGX 091146
FFWHGX
TXC039-157-091430-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
636 AM CDT SAT JUN 9 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN BRAZORIA COUNTY IN SOUTHEAST TEXAS
  FORT BEND COUNTY IN SOUTHEAST TEXAS

* UNTIL 930 AM CDT

* AT 628 AM CDT...DOPPLER RADAR INDICATED HEAVY RAINFALL IN CENTRAL
FORT BEND COUNTY DRIFTING SLOWLY TO THE SOUTHWEST.  THIS AREA OF
RAIN WAS MOVING OVER SOME AREAS IN FORT BEND COUNTY WHICH RECEIVED 4
TO 8 INCHES OF RAIN OVERNIGHT... AND WILL BE MOVING INTO AREAS OF
NORTHERN BRAZORIA COUNTY THAT LIKEWISE HAD 4 TO 5 INCH RAINFALLS
OVERNIGHT.  THUS THESE SLOW MOVING SHOWERS AND THUNDERSTORMS...
WHICH ARE PRODUCING RAINFALL RATES OF 1 TO 2 INCHES PER HOUR... MAY
BRING A RAPID ONSET OF FLASH FLOODING.  ADDITIONALLY, MANY ROADS IN
THESE COUNTIES REMAIN IMPASSABLE DUE TO THE HEAVY OVERNIGHT RAINS.

* FLOODING IS EXPECTED IN OR NEAR...
  FIRST COLONY...FRESNO...MANVEL...MISSOURI CITY

DO NOT CROSS ANY LOCATION WHERE WATER COVERS THE ROAD!

PLEASE REPORT FLOODING TO THE COUNTY SHERIFF...LOCAL POLICE...OR
DEPARTMENT OF PUBLIC SAFETY. THEY WILL RELAY YOUR REPORT TO THE
NATIONAL WEATHER SERVICE.

LAT...LON 2956 9538 2954 9526 2942 9527 2908 9576
          2942 9598 2967 9603 2976 9586 2960 9552

NWS Houston/Galveston, TX wrote its last area forecast discussion before this flash flood warning went out at Jun 9, 2:58 AM CDT, 3 hours 38 minutes earlier.

SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
245 PM CDT FRI JUN 8 2001

...A DANGEROUS FLASH FLOOD THREAT CONTINUES FOR SOUTHEAST TEXAS...

TROPICAL DEPRESSION ALLISON REMNANTS A VERY EFFICIENT RAIN MACHINE!
4-6 INCHES/HOUR RADAR ESTIMATED RAINFALL RATES OVER HOUSTON METRO
AREA W/LARGE SWATH OF TRAINING VERY HEAVY RAINSHOWERS EXTENDING SW
TO BRAZORIA COUNTY. A BAD NIGHT INDEED. IF THIS KEEPS UP (ALREADY
THE 4TH NIGHT IN A ROW)...SOME AREAS MAY VERY WELL APPROACH THE
ANNUAL RAINFALL QUOTA.

HIGH PW VALUES >2 INCHES WILL CONTINUE THROUGH SUNDAY AT LEAST OVER
THE SOUTHERN REGIONS. MODELS SUGGEST SLOW SOUTHWARD MOVEMENT OF
TROPICAL LOW (REMNANTS OF ALLISON) AND SHOULD BE JUST S OF GLS BY 24
HOURS. CONFLUENT FLOW AT LOW AND MID LEVELS SUGGEST STRONGEST UVM
WILL BE SHIFTING SOUTHWARD TO COASTAL WATERS BY SUNDAY. BOTH AVN AND
ETA SHOWS CONTINUING DIVERGENCE ALOFT OVER REGION NEXT 24-36 HRS.
WILL CONTINUE FLASH FLOOD WATCH THROUGH TONIGHT FOR ALL OF CWFA.
AS UPPER LEVEL LOW SHIFTS TO NW GULF SUNDAY NIGHT...POPS SHOULD
DRAMATICALLY LOWER ESPECIALLY NORTHERN ZONES.

WILL STAY CLOSE TO MESO-ETA PROGGED SURFACE WINDS AND AREAL COVERAGE
OF PCPN. SURFACE FEATURES HAS BEEN INITIALIZED WELL OVER OUR REGION
BY THIS MODEL W/SURFACE LOW OVER SW ZONES AT 09/06Z.

MARINE AREA WILL HAVE CAUTION TODAY FOR COASTAL WATERS AS SURFACE
WINDS TO REMAIN IN THE 15 TO 20 KNOT RANGE. CONTINUED STRONG WINDS
DUE ACROSS GALVESTON BAYS WILL WARRANT A SMALL CRAFT ADVISORY.
NO FLAGS FOR MATAGORDA BAY. NO CHANGES TO EXTENDED FORECAST.

37/41

.HGX...FLASH FLOOD WATCH ALL OF SOUTHEAST TEXAS THROUGH TONIGHT.
       SCA GALVESTON BAY. SCEC COASTAL WATERS.

PRELIMS...
CLL TT 083/071 088/072 088 954
IAH TT 083/072 086/072 086 +96
GLS TT 084/075 084/075 084 ++7

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.