Flash Flood Warning 83, NWS Houston/Galveston, TX

Issued

Sep 9, 2001, 10:55 AM CDT (15:55 UTC)

Expired

Sep 9, 2001, 1:15 PM CDT

In force

2 hr

Issued by

NWS Houston/Galveston, TX

Area

Whole counties; the outline is the Mesonet’s reconstruction

Counties Montgomery County, TX, Waller County, TX

The Houston radar (KHGX), 96 km from the middle of the area, began a volume at 15:57 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 091554
FFWHOU
TXC339-473-091815-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1055 AM CDT SUN SEP 9 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WALLER COUNTY IN SOUTHEAST TEXAS
  MONTGOMERY COUNTY IN SOUTHEAST TEXAS

* UNTIL 115 PM CDT

* AT 1045 AM CDT...EMERGENCY MANAGEMENT REPORTED FLOODING ON
  SECONDARY ROADS IN NORTHEAST WALLER COUNTY JUST NORTH OF
  THE CITY OF WALLER. FLOODING HAS ALSO BEEN REPORTED NEAR
  COCHRANS CROSSING AND AT I-45 AND COUNTRY ROAD IN MONTGOMERY
  COUNTY.

* FLOODING IS EXPECTED IN OR NEAR...
  CONROE...CUT AND SHOOT...HEMPSTEAD...MAGNOLIA

LIGHT TO MODERATE RAINFALL WILL CONTINUE OVER MONTGOMERY AND WALLER 
COUNTIES WITH ADDITIONAL RAINFALL AMOUNTS OF AROUND AN INCH IN THE 
NEXT COUPLE OF HOURS. THIS RAINFALL WILL ONLY AGGRAVATE ONGOING 
FLOODING PROBLEMS.

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 3032 9518 3019 9516 3012 9526 3016 9547
          3015 9577 3017 9599 2982 9588 2983 9610
          3022 9616 3023 9577 3059 9578 3047 9540

NWS Houston/Galveston, TX wrote its last area forecast discussion before this flash flood warning went out at Sep 9, 9:54 AM CDT, 1 hour 1 minute earlier.

SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
954 AM CDT SUN SEP 9 2001

MCS CURRENTLY OVER NORTHERN HALF OF SE TX AND CURRENTLY HAVE A FEW
FLASH FLOOD WARNINGS OUT.  THE FORECAST PROBLEM OF THE DAY CONCERNS
ITS MOVEMENT AND EFFECTS.

OVER THE PAST COUPLE OF HOURS THE CLOUD TOPS HAVE COOLED OVER MAINLY
THE SOUTHERN END OF THE SYSTEM.  THE SURFACE COLD FRONT LOOKS TO
HAVE STALLED OVER N TX AND THE HILL COUNTRY WHILE A MESO HIGH HAS
FORMED BEHIND THE MCS.  THE OUTFLOW BOUNDARY WAS NEARLY STATIONARY
OVER THE I-10 CORRIDOR BETWEEN 7 AND 9 AM...BUT OVER THE PAST HOUR
HAS BEGUN TO SLOWLY MOVE TOWARD THE COAST.  THE 12Z 200 AND 300 MB
ANALYSIS INDICATE SE TX WAS UNDER GOOD DIFFLUENCE AND THE ENTRANCE
REGION OF THE STRONG JET MOVING UP THE EAST SIDE OF THE TROUGH OVER
THE PLAINS...WHILE WATER VAPOR SHOWED A JET MOVING INTO WEST TEXAS.
WITH PW/S BETWEEN 2 AND 2.1 INCHES...LI/S AT -8...AND CAPE VALUES
BETWEEN 4000 AND 5000...FEEL THAT THE MAIN THREAT WILL CONTINUE TO BE
HEAVY RAIN WITH ISOLATED SEVERE POSSIBLE.

THE 12Z ETA SHOWS THAT THE SURFACE THETA-E RIDGE SHOULD REMAIN NEARLY
STATIONARY THIS AFTERNOON OVER SE TX.  FEEL THAT SHOWERS AND STORMS
WILL SPREAD TO THE COAST.  GIVEN THIS...WILL UPDATE THE FORECAST TO
EXTEND THE WATCH TO THE COAST AND UPDATE TEMPERATURES OVER THE
SOUTHERN HALF OF THE AREA.

.HGX...FFA SE TX.
       SCEC 00 TO 60 NM HIGH ISLAND TO THE MATAGORDA SHIP CHANNEL.

PL-40
43

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.