Flash Flood Warning 63, NWS Houston/Galveston, TX

Issued

Aug 30, 2001, 8:20 PM CDT (01:20 UTC)

Expired

Aug 31, 2001, 2:00 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 01:21 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 310118
FFWHOU
TXC039-157-167-201-310700-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
820 PM CDT THU AUG 30 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 200 AM CDT

* AT 815 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING  
  VERY HEAVY RAINFALL ACROSS FORT BEND...BRAZORIA...GALVESTON...AND 
  SOUTHERN HARRIS COUNTIES.

* FLOODING IS EXPECTED IN OR NEAR...
  ALDINE...ALVIN...ANGLETON...BACLIFF...FRIENDSWOOD...PEARLAND...
  CLEAR LAKE CITY...PASADENA...SANTA FE...LEAGUE CITY

SINCE 500 PM THE HARRIS COUNTY RAINFALL NETWORK REPORTED BETWEEN 1 
1/2 AND 3 1/2 INCHES OF RAIN ALONG AND WEST OF INTERSTATE 45 IN 
SOUTHEASTERN HARRIS AND NORTHWESTERN GALVESTON COUNTIES. AT 815 PM 
RADAR SHOWED THUNDERSTORMS CONTINUED TO DEVELOP AND MOVE ACROSS THE 
FOUR COUNTY AREA.  THE HEAVIEST RAINFALL WILL OCCUR IN AN AREA 
BETWEEN ROSHARON AND ANGLETON EAST TO BETWEEN PASADENA AND TEXAS 
CITY.

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 OUTSIDE CIRCUIT BREAKER IF FLOOD WATERS 
ENTER YOUR HOME.

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 3013 9511 3004 9526 3012 9555 3007 9584
          2981 9584 2948 9603 2887 9557 2895 9533
          2903 9521 2920 9515 2931 9492 2953 9501
          2980 9497

NWS Houston/Galveston, TX wrote its last area forecast discussion before this flash flood warning went out at Aug 30, 2:31 PM CDT, 5 hours 49 minutes earlier.

SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
230 PM CDT THU AUG 29 2001

HEAVIEST RAINFALL THIS MORNING WAS OVER CHAMBERS COUNTY INCLUDING
MUCH OF BOLIVAR PENINSULA. ACTIVE AREA OF CONVECTION EARLY THIS
AFTERNOON JUST WEST OF CWFA (OR JUST E OF I-35). EXPECT PWATS TO
REMAIN AT OR ABOVE 2 INCHES THROUGH SUNDAY. UPPER TROUGH TO PERSIST
OVER TX NEXT SEVERAL DAYS. DEEP GULF MOISTURE TO REMAIN IN PLACE
AIDED BY LOW LEVEL JET. UPPER LEVEL DIFFLUENCE GETTING WEAKER AND
SHIFTING SOUTHWARD BY FRIDAY. HOWEVER...DO NOT SEE ANY BREAK AND
EXPECT HIGH POPS W/HEAVY RAIN (ON AND OFF) TO CONTINUE. GROUND
OBVIOUSLY ALREADY SATURATED LAST FEW DAYS AND ADDITIONAL RAINFALL
WILL EASILY RUNOFF. SATELLITE LOOPS SHOWS CONVECTION FIRING UP JUST
S OF RIO GRANDE AND ALSO BETWEEN CRP AND COT. WILL EXTEND FFA INTO
TONIGHT. WILL BE COMING OUT W/FFAHGX SHORTLY. AVN CONTINUE TO SHOW
UPPER TROUGHING THROUGH TUESDAY AND MRF INDICATE TROUGH BEING KICKED
OFF TO THE NE WED/THU AS STRONG UPPER TROUGH APPROACH THE WEST
COAST. IF SO...BREAK MAY BE COMING THEN. WE SHALL SEE. CANADIAN HIGH
MOVING INTO THE GREAT LAKES THIS WEEKEND W/TAIL END OF ASSSOCIATED
FRONT POSSIBLY MOVING TO NE TX SATURDAY AND MAYBE SAGGING TO OUR N
ZONES SUNDAY (?). CONFIDENCE IS NOT HIGH ON THIS. WIND/SEAS PICKED
UP SOMEWHAT TO NEAR SCEC CRITERIA TODAY AND EXPECT THIS TREND TO
CONTINUE TONIGHT.

THANKS TO KLCH FOR THE COORDINATION.

37/46/48

.HGX...FFA ALL CWA TONIGHT.

CLL TT 073/084 073/088 073 886
IAH TT 073/083 074/086 074 886
GLS TT 077/083 078/085 078 +97

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.