Flash Flood Warning 65, NWS Houston/Galveston, TX

Issued

Aug 31, 2001, 1:05 AM CDT (06:05 UTC)

Expired

Aug 31, 2001, 7:00 AM CDT

In force

6 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, Galveston County, TX, Harris County, TX

The Houston radar (KHGX), 30 km from the middle of the area, began a volume at 06:07 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 310603
FFWHOU
TXC039-157-167-201-311200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
105 AM CDT FRI AUG 31 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 700 AM CDT

* AT 1255 AM CDT...DOPPLER RADAR INDICATED VERY HEAVY RAINFALL.

* FLOODING IS EXPECTED IN OR NEAR...
  MISSOURI CITY...THOMPSONS...PEARLAND... ALVIN...MANVEL...
  ROSHARON... FRIENDSWOOD...SANTA FE...CLEAR LAKE CITY...
  LEAGUE CITY...PASADENA...KEMAH...TEXAS CITY...GALVESTON...
  BACLIFF... LA MARQUE...DICKINSON

SINCE 500 PM THE HARRIS COUNTY RAINFALL NETWORK REPORTED BETWEEN 2 
AND 5 INCHES OF RAIN ALONG AND WEST OF INTERSTATE 45 IN SOUTHEASTERN 
HARRIS AND NORTHWESTERN GALVESTON COUNTIES. DOPPLER RADAR ESTIMATES 
SIMILAR AMOUNTS ACROSS NORTHERN BRAZORIA AND FORT BEND COUNTIES. AT 
1255 AM RADAR SHOWED ANOTHER ROUND OF THUNDERSTORMS WITH HEAVY RAIN 
MOVING ACROSS THE FOUR COUNTY AREA. THE HEAVIEST RAINFALL WILL OCCUR 
IN AN AREA BETWEEN A LINE FROM BAY CITY TO MISSOURI CITY EAST.

EMERGENCY MANAGEMENT AND LAW ENFORCEMENT OFFICIALS REPORT A NUMBER 
OF ROAD CLOSURES DUE TO HIGH WATER...INCLUDING U.S. HIGHWAY 59 AT
FM 2218 AND FM 762.

THIS IS AN EXTREMELY DANGEROUS FLOOD SITUATION ACT NOW TO PROTECT 
YOUR LIFE AND PROPERTY BE PREPARED TO MOVE TO HIGHER GROUND IF 
AUTHORITIES ASK YOU TO EVACUATE.

MANY ROADS IN THE HOUSTON METRO AREA ARE DESIGNED AS FLOODWAYS. THIS 
MEANS THE WATER WILL FLOOD THE STREET TO SOME DEPTH...BUT HOMES MAY 
STAY DRY. UNLESS WATER BEGINS TO ENTER YOUR HOME AND CONTINUES TO 
RISE RAPIDLY...STAY IN YOUR HOME...ITS THE SAFEST PLACE. IN 
ADDITION...TURN OFF THE MAIN CIRCUIT BREAKER IF FLOOD WATERS ENTER 
YOUR HOME TO PREVENT ELECTROCUTION.

DO NOT CROSS ANY LOCATION WHERE WATER COVERS THE ROAD IT ONLY TAKES
A FOOT OR TWO OF RUNNING WATER TO SWEEP AWAY MOST VEHICLES. MOST OF
VICTIMS FROM TROPICAL STORM ALLISON DROWNED WHEN THEIR CARS STALLED 
OR WERE SWEPT AWAY IN FLOOD WATERS.

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 2984 9498 2961 9503 2933 9476 2885 9551
          2932 9590 2957 9605 2986 9582

NWS Houston/Galveston, TX wrote its last area forecast discussion before this flash flood warning went out at Aug 30, 8:52 PM CDT, 4 hours 13 minutes earlier.

SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
852 PM CDT THU AUG 30 2001

FORECAST PROBLEM OF THE NIGHT CONTINUES TO BE EXTENT AND AMOUNT OF
RAINFALL.  00Z SURFACE ANALYSIS SHOWED A SURFACE TROUGH ALONG AND
JUST OFFSHORE OF THE UPPER TEXAS COAST.  00Z SOUNDINGS SHOW PW/S 2.1
TO 2.5 INCHES...850 MB DEWPOINTS OF 16 TO 18 CELSIUS...AND 700 MB
DEWPOINTS OF 4 TO 7 CELSIUS.  WATER VAPOR INDICATED A SHORTWAVE
TROUGH MOVING IN FROM THE WEST WHILE THE UPPER CHARTS AT 00Z SHOWED
GOOD DIFFLUENCE OVER THE AREA.  IR AND RADAR SHOWED THAT
REDEVELOPMENT WAS OCCURRING RIGHT OVER SE TX.  THE 00Z SOUNDINGS ALSO
INDICATE A SEVERE WEATHER THREAT.  WILL MENTION A CHANCE OF SEVERE
STORMS IN THE COASTAL COUNTIES WHERE THE GREATEST THREAT APPEARS TO
BE.

THE RAINFALL SHOULD CONTINUE AND WILL KEEP THE FLASH FLOOD WATCH IN
EFFECT FOR TONIGHT AND EXTEND IT INTO FRIDAY.  THE THINKING HERE IS
THAT THE GREATEST THREAT WILL BE ACROSS THE SOUTHERN THIRD.

PL-40
31

.HGX...FFA ALL CWA TONIGHT AND FRIDAY.
       SCEC 00 TO 20 NM HIGH ISLAND TO THE MATAGORDA SHIP CHANNEL.

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.