Flash Flood Warning 75, NWS Houston/Galveston, TX

Issued

Sep 1, 2001, 8:36 AM CDT (13:36 UTC)

Expired

Sep 1, 2001, 11:30 AM CDT

In force

3 hr

Issued by

NWS Houston/Galveston, TX

Area

Whole counties; the outline is the Mesonet’s reconstruction

County Fort Bend County, TX

The Houston radar (KHGX), 85 km from the middle of the area, began a volume at 13:39 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 011340
FFWHOU
TXC157-011630-

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

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 1130 AM CDT

* AT 834 AM CDT...DOPPLER RADAR INDICATED AN AREA OF VERY HEAVY
  RAINFALL MOVING INTO SOUTHWEST FORT BENT COUNTY.  THIS AREA OF
  STORMS IS EXPECTED TO PRODUCE AN ADDITIONAL 2 TO 3 INCHES OF
  RAIN FROM NEEDVILLE TO MISSION BEND BY 10 AM.

* FLOODING IS EXPECTED IN OR NEAR...
  NEEDVILLE...PLEAK...RICHMOND...ROSENBERG...SIMONTON

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 2980 9584 2978 9585 2978 9589 2973 9602
          2963 9601 2960 9606 2951 9606 2950 9603
          2948 9606 2945 9604 2945 9576 2975 9576

NWS Houston/Galveston, TX wrote its last area forecast discussion before this flash flood warning went out at Sep 1, 2:40 AM CDT, 5 hours 56 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.