Flash Flood Warning 76, NWS Houston/Galveston, TX

Issued

Sep 1, 2001, 9:06 AM CDT (14:06 UTC)

Expired

Sep 1, 2001, 11:00 AM CDT

In force

114 min

Issued by

NWS Houston/Galveston, TX

Area

Whole counties; the outline is the Mesonet’s reconstruction

County Harris County, TX

The Houston radar (KHGX), 55 km from the middle of the area, began a volume at 14:09 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.

000 
WGUS54 KHGX 011413
FFWHOU
TXC201-011600-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON-GALVESTON TX
906 AM CDT SAT SEP 1 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  HARRIS COUNTY IN SOUTHEAST TEXAS

* UNTIL 1100 AM CDT

* AT 904 AM CDT...DOPPLER RADAR INDICATED AN AREA OF HEAVY
  RAINFALL MOVING INTO SOUTHERN HARRIS COUNTY MOVING NORTHEAST
  AT 20 MPH.

* FLOODING IS EXPECTED IN OR NEAR...
  ALDINE...BELLAIRE...BUNKER HILL VILLAGE...CLOVERLEAF

THIS AREA OF RAIN WILL MAINLY AFFECT THE PART OF HARRIS COUNTY SOUTH 
OF INTERSTATE 10 WHERE IT IS EXPECTED TO PRODUCE TOTALS OF 1 TO 3 
INCHES BY 11 AM.  MUCH OF THIS AREA HAS RECEIVED 5 INCHES OR MORE OF 
RAIN IN THE PAST TWO DAYS.  DUE TO THE FAIRLY RAPID MOTION OF THESE 
STORMS... THE IMPACT IS EXPECTED TO BE MAINLY ON SMALL CREEKS AND 
STREAMS RATHER THAN BAYOUS.

SMALL CREEKS...STREAMS...UNDERPASSES...AND FEEDER ROADS MAY FLOOD 
QUICKLY. AVOID LOCATIONS WATER COVERS THE GROUND

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 3001 9511 2973 9517 2963 9541 2981 9580
          3006 9588

NWS Houston/Galveston, TX wrote its last area forecast discussion before this flash flood warning went out at Sep 1, 2:40 AM CDT, 6 hours 26 minutes earlier.

SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
240 AM CDT SAT SEP 01 2001

CONVECTION INCREASING SINCE MIDNIGHT ALONG THE COAST. COASTAL
SURFACE TROUGH SERVING AS FOCUS WITH AT LEAST SOME SUPPORT FROM
UPPER LEVEL DISTURBANCE APPROACHING FROM WEST. SYNOPTIC FEATURES
HAVE WEAKENED SOME LAST 24H AND MESOSCALE SYSTEMS ARE MAIN DRIVERS.
ETA AND AVN BOTH SHOW AXIS OF 2.25 PWATS REMAINING OVER SOUTHEAST
TEXAS THROUGH TODAY WITH MID TO UPPER FLOW WEST TO EAST AND LOW
LEVEL FLOW SOUTH TO SOUTHWEST.  UNFORTUNATELY IDEAL SET UP FOR
TRAINING CONVECTION. EXPECT EXCESSIVE RAINFALL WHERE THE TRAINING
SETS UP.  WILL GO WITH SCATTERED 1 TO 2 INCHES NORTH...SCATTERED 2
TO 4 INCH RAINS ISOLATED 5 TO 8 INCHES SOUTH.  IF CONVECTION GETS
MORE FOCUSSED AND..OR LASTS LONGER THESE AMOUNTS ARE TOO
CONSERVATIVE. EXPECT HIGHER CHANCE OF EXCESSIVE RAIN SOUTHERN HALF
ASSUMING SURFACE FOCUS STAYS NEAR COAST. HOWEVER...GIVEN SATURATED
SOILS ALL AREAS AND FLOODING ALREADY IN PROGRESS...WILL EXTEND FFA
THROUGH TODAY ALL AREAS.

MODELS TRY TO GIVE US A CHANCE...REPEAT CHANCE... OF A BREAK SUNDAY
AND MONDAY AS MID TO UPPER TROF AXIS PROGGED JUST TO OUR EAST. STILL
KEEP AMPLE MOISTURE SO SCATTERED CONVECTION STILL IN THE PICTURE.
ALSO...MODELS COULD BE OFF A BIT. AVN NOW RETROGRADES MID LEVEL TROF
TUESDAY AND WEDNESDAY SETTING THE STAGE FOR MORE ORGANIZED HEAVY
RAIN AGAIN BY MID WEEK.  SINCE THIS IS A CHANGE FROM PREVIOUS MODEL
RUNS WILL STAY WITH CHANCE CATEGORY FOR NOW IN EXTENDED.

30/43/39

.HGX...FFA ALL CWA TODAY.
       SCEC 0-60 NM HIGH ISLAND TO THE MATAGORDA SHIP CHANNEL.

CLL...TT 082/073 089/073 089 865
IAH...TT 080/075 087/075 088 +75
GLS...TT 083/079 086/079 087 +85

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.