Flash Flood Warning 24, NWS Houston/Galveston, TX

Issued

Aug 16, 2002, 7:41 AM CDT (12:41 UTC)

Expired

Aug 16, 2002, 10:30 AM CDT

In force

3 hr

Issued by

NWS Houston/Galveston, TX

Area

Counties, with a storm outline in the text

Counties Chambers County, TX, Liberty County, TX

The Houston radar (KHGX), 59 km from the middle of the area, began a volume at 12:43 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.

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

000 
WGUS54 KHGX 161241
FFWHOU
TXC071-291-161530-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
740 AM CDT FRI AUG 16 2002

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  LIBERTY COUNTY IN SOUTHEAST TEXAS
  CHAMBERS COUNTY IN SOUTHEAST TEXAS

* UNTIL 1030 AM CDT

* AT 735 AM CDT...DOPPLER RADAR INDICATED VERY HEAVY RAINFALL        
  OCCURRING OVER WESTERN CHAMBERS COUNTY AND SOUTHERN AND CENTRAL    
  LIBERTY COUNTY. RADAR SHOWED ESTIMATES OF 2 TO 4 INCHES DURING THE 
  LAST TWO HOURS. CONSIDERING THE HEAVY RAINFALL THIS AREA RECEIVED  
  YESTERDAY AND AN ADDITIONAL 2 INCHES LIKELY OVER THE NEXT TWO       
  HOURS...FLOODING SHOULD BE EXPECTED IN THIS AREA.  

* FLOODING IS EXPECTED IN OR NEAR...
  MONT BELVIEU...LIBERTY...DAYTON...BEACH CITY...
  ANAHUAC...WALLISVILLE...HANKAMER

DO NOT CROSS ANY LOCATION WHERE WATER COVERS THE ROAD

SMALL CREEKS...STREAMS...BAYOUS..AND FARM-TO-MARKET OR OTHER
SECONDARY ROADS MAY FLOOD QUICKLY. AVOID LOCATIONS WHERE 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 3009 9456 2955 9458 2970 9489 3005 9496

NWS Houston/Galveston, TX wrote its last area forecast discussion before this flash flood warning went out at Aug 16, 3:15 AM CDT, 4 hours 26 minutes earlier.

SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
315 AM CDT FRI AUG 16 2002

SFC PLOT EARLY THIS MORNING SHOWS WEAK SFC HIGH STILL OVER INLAND
AREAS OF FA IN ASSOCIATION WITH WHAT IS LEFT FROM MESO HIGH FROM
EVE CONVECTION. WEAK INVERTED SFC TROF EXTENDS ACROSS COASTAL WATERS
AND INTERSECTS THE COAST NEAR GLS. FA AND COASTAL WATERS HAVE BEEN
FREE OF CONVECTION AS ATMOSPHERE HAS TEMPORARILY STABILIZED IN THE
WAKE OF EARLIER WIDESPREAD RAINS. WILL LIKELY SEE AT LEAST ISOLATED
SHWR ACTIVITY DEVELOP DURING THE NEXT FEW HOURS ACROSS COASTAL AND
CENTRAL ZONES.

FORECAST CONCERN CONTINUES TO BE THE THREAT OF HEAVY RAINFALL TODAY
OVER THE AREA. HAVE TRENDED THE FORECAST TOWARDS A BLEND OF MODELS
AS DO NOT REALLY LIKE ANY ONE PARTICULAR MODEL. DO BELIEVE THAT THE
AVN MODEL PW FIELD IS THE MOST REALISTIC WITH SLIGHTLY HIGHER VALUES
OVER AREA WHICH IS IN ROUGH AGREEMENT WITH THE GOES SOUNDER DERIVED
PW FIELD. A VERY MOIST AIRMASS IS STILL PRESENT OVER MOST OF THE FA
WITH VALUES JUST OVER 2 INCHES. THIS COUPLED WITH UPPER LEVEL
DIFFLUENCE (ALBEIT WEAKER THAN YEST) SHOULD PRODUCE SCT SHWRS AND
THUNDERSTORMS OVR THE AREA TODAY WITH LOCALLY HEAVY RAINFALL A
POSSIBILITY...ESPECIALLY EASTERN AREAS. CONSIDERING THAT 1 TO 2
INCHES OF RAIN WILL AGGRAVATE THE CURRENT SITUATION ACROSS COUNTIES
THAT SAW HEAVY RAIN YEST WILL KEEP THE CURRENT FLASH FLOOD WATCH UP
FOR TODAY. DO NOT EXPECT TO SEE THE AMOUNTS OR COVERAGE THAT WE SAW
YEST.

FOR REST OF PACKAGE...LIKE COOLER TEMP GUIDANCE WITH PLENTY OF
CLOUDS AROUND TODAY. WILL KEEP SCT POPS FOR THE WEEKEND AS I LIKE
THE AVN IDEA OF LINGERING HIGH MOISTURE VALUES. WILL KEEP TREND OF
GRADUAL WARMING AND SLIGHTLY LOWER POPS EARLY NEXT WEEK AS HEIGHTS
RISE OVR AREA.

FOR MARINE AREA...WILL KEEP SCEC UP FOR OFFSHORE WATERS.

33/41

.HGX...FFA TODAY SOUTHEASTERN 1/2 OF SE TX
       SCEC OFFSHORE WATERS

PRELIMS...
CLL EB 090/075 093/074 094 423
IAH TB 088/075 092/075 093 524
GLS TB 086/080 088/080 088 624

Flash Flood Warnings in Texas, 2002Every flash flood warning in 2002

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.