Flash Flood Warning 18, NWS Houston/Galveston, TX

Issued

Aug 15, 2002, 1:14 PM CDT (18:14 UTC)

Expired

Aug 15, 2002, 4:00 PM CDT

In force

3 hr

Issued by

NWS Houston/Galveston, TX

Area

Counties, with a storm outline in the text

Counties Grimes County, TX, Waller County, TX, Washington County, TX

The Houston radar (KHGX), 128 km from the middle of the area, began a volume at 18:16 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 151814
FFWHOU
TXC185-473-477-152100-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
112 PM CDT THU AUG 15 2002

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  GRIMES COUNTY IN SOUTHEAST TEXAS
  WASHINGTON COUNTY IN SOUTHEAST TEXAS
  WALLER COUNTY IN SOUTHEAST TEXAS

* UNTIL 400 PM CDT

* AT 112 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS CONTINUING 
TO DEVELOP AND MOVE OVER PORTIONS OF WALLER...GRIMES AND WASHINGTON 
COUNTIES WHERE HEAVY RAINFALL AND FLOODING HAVE ALREADY OCCURED. 
ANOTHER ONE TO TWO INCHES OF RAINFALL IS FORECAST BY 4 PM. AN 
ESTIMATED 6 TO 8 INCHES HAS ALREADY FALLEN IN NORTHERN 
WALLER...EASTERN WASHINGTON AND EXTREME SOUTHERN GRIMES COUNTIES.

* WIDESPREAD FLOODING OF SECONDARY ROADS AND POSSIBLY ON LOW AREAS 
OF HIGHWAY 6 AND 290 CAN BE EXPECTED. CREEKS AND DITCHES IN THE AREA 
WILL ALSO EXPERIENCE SIGNIFICANT OVER BANK FLOODING. 

IF YOU MUST TRAVEL IN THE WARNED AREA...DO SO WITH EXTREME CAUTION. 
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 3031 9592 3002 9603 3010 9628 3029 9635

NWS Houston/Galveston, TX wrote its last area forecast discussion before this flash flood warning went out at Aug 15, 9:55 AM CDT, 3 hours 19 minutes earlier.

SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
955 AM CDT THU AUG 15 2002

STARTING TO SEE ADDITIONAL DEVELOPMENT SW OF AREA THAT GOT HAMMERED
LATE LAST NIGHT AND EARLY THIS MORNING. HVY RAIN AREAS AS FAR N AS
CLL ATTM. HAVE OPTED TO GO WITH FFA FOR ALL BUT SW CORNER OF CWA
THIS AFTN. WONT TAKE MUCH TO CAUSE MORE FLD PROBLEMS GIVEN
SATURATED GROUND.

SFC ANALYSIS SHOWS MESO BOUNDARY JUST W OF A BRENHAM TO ANGLETON
LN. AREA ALONG AND EAST OF THIS LINE OF MOST CONCERN.

MODELS INDC ENHANCED LIFT AND MOISTURE EXITING THE REGION DRG THE
AFTN. AM NOT ANTICIPATING ANY PROBS TNGT.

FFA ALREADY OUT. NEW ZFP SHORTLY.

46/37/30/WT

.HGX....SCA OFFSHORE...SCEC NEARSHORE.

PRELIMS...
CLL EB 090/076 094/075 095 623
IAH TB 087/076 092/076 094 734
GLS TB 086/080 088/080 089 744
SW COAST                   534

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.