Flash Flood Warning 101, NWS Houston/Galveston, TX

Issued

Oct 18, 1998, 12:02 PM CDT (17:02 UTC)

Expired

Oct 18, 1998, 4:00 PM CDT

In force

4 hr

Issued by

NWS Houston/Galveston, TX

Area

Whole counties

County San Jacinto County, TX

The Houston radar (KHGX), 124 km from the middle of the area, began a volume at 17:02 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 
TTAA00 KHOU 181702
FFWHOU
TXC015-089-157-201-339-407-473-481-182055-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1202 PM CDT SUN OCT 18 1998

THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  AUSTIN COUNTY IN SOUTH CENTRAL TEXAS
  COLORADO COUNTY IN SOUTH CENTRAL TEXAS
  FORT BEND COUNTY IN SOUTHEASTERN TEXAS
  HARRIS COUNTY IN SOUTHEASTERN TEXAS
  MONTGOMERY COUNTY IN SOUTHEASTERN TEXAS
  SAN JACINTO COUNTY IN SOUTHEASTERN TEXAS
  WALLER COUNTY IN SOUTHEASTERN TEXAS
  WHARTON COUNTY IN SOUTH CENTRAL TEXAS

* UNTIL 400 PM CDT

* AT 1155 AM... NATIONAL WEATHER SERVICE RADAR INDICATED AN AREA OF
  MODERATE TO VERY HEAVY RAINFALL FROM LIBERTY COUNTY...ACROSS
  CHAMBERS COUNTY...EASTERN HARRIS COUNTY...NORTHERN GALVESTON
  COUNTY...NORTHERN BRAZORIA COUNTY THEN EASTERN MATAGORDA COUNTY.
  THIS AREA WAS MOVING SLOWLY TOWARDS THE SOUTHEAST. RAINFALL AMOUNTS
  OF 3 TO 5 INCHES CAN BE EXPECTED IN THE ABOVE AREA BY 2 PM. THIS
  RAINFALL WILL PRODUCE WIDESPREAD ROAD AND CREEK FLOODING.

* ELSEWHERE IN THE WARNED AREA...RAINFALL AMOUNTS HAVE AVERAGED FROM
  3 TO 5 INCHES SINCE THE RAINFALL BEGAN LAST NIGHT...WITH SOME
  LOCATIONS REPORTING IN EXCESS OF 8 INCHES. ALTHOUGH THE HEAVY
  RAINFALL HAS MOVED TO THE EASTERN PORTION OF THE WARNED AREA...
  SERIOUS STREET AND STREAM FLOODING COUNTIES IN MANY AREAS. NUMEROUS
  LOCATIONS ARE REPORTING ROADS CLOSED WITH SOME EVACUATION OF
  HOMES. BECAUSE OF THIS...THE FLASH FLOOD WARNING HAS BEEN EXTENDED
  THROUGH 4PM

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROADWAY.
THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY.
VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.  MOVE
TO HIGHER GROUND.

NWS Houston/Galveston, TX wrote its last area forecast discussion before this flash flood warning went out at Oct 18, 9:50 AM CDT, 2 hours 12 minutes earlier.

SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
950 AM CDT SUN OCT 18 1998

SLOW MVG CF APPEARS TO BE JUST SOUTH OF A SAT TO AUS TO TYR LN.
EXPECT FNT TO MOVE INTO CLL AREA ARND NOON.  UPR ANALYSIS AT 500MB
THIS MRNG SHOWS WEAK S/E ENERGY RIDING UP FM S TX WHILE 200MB SHOWS
GOOD DIFFLUENCE WITH REMNANTS OF RIGHT JET ENTRANCE OVER EAST CNTRL
TX AND MAIN JET AXIS ALNG A OK-MO-IL LINE AS IT PULLS OFF TO NE.
850MB FNT STILL WELL BACK OVR TX PNHDL WITH 20-35KT SRLY INFLOW
STILL CONCENTRATED FROM BRO TO NE TX.  EXPECT UPR DYNAMICS TO CONT
INTERACTING WITH WARM/MOIST AIRMASS ACRS AREA TO PRODUCE WIDESPREAD
RAIN WITH EMBEDDED SHWRS/TSTMS ACRS MUCH OF FA TDY.  RADAR SHOWS
MAIN AXIS OF HEAVIER RAINS NOW ACRS THE FIRST TWO TEERS OF COUNTIES
NEAR THE COAST AND SLWLY SAGGING SWRD.  IF THIS TREND CONTS...
HOPEFULLY THE HEAVIER RAINS WILL PUSH OF THE COAST DURING THE AFTN.
HOWEVER...CONSIDERING THE SLOW MVMNT OF FNT AND EXPECTED STALLING OF
FNT ACRS FA LATER THIS AFTN...WILL CONT WITH 100% CHC RAINS AND FFA
THRU TDY.  WILL TWEAK COASTAL COUNTIES TO CLDY SKIES AND 100% CHC
RAIN AND LOWER ALL HIGH TMPS A CAT OR TWO.  SHUD CONT TO MENTION
PSBL SVR IN ACRS CNTRL AND COASTAL ZONES AS STILL GETTING ISOLATED
SPIN UPS WITH TRAINING CELLS AND THIS TREND SEEMS TO BE SUPPORTED BY
12Z CPR HODO.  FLOOD PROBLEMS CONT MOST AREAS.  39

PRELIMS...
CLL  C/C C/C  73/64 76/61 +776  HVY RAINS
IAH  C/C C/C  75/67 78/64 +776  HVY RAINS/POSSIBLY SVR
GLS  C/C C/C  80/76 80/72 +776  HVY RAINS/POSSIBLY SVR

Flash Flood Warnings in Texas, 1998Every flash flood warning in 1998

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.