Flash Flood Warning 39, NWS Houston/Galveston, TX

Issued

Aug 4, 1998, 9:16 PM CDT (02:16 UTC)

Expired

Aug 4, 1998, 11:15 PM CDT

In force

119 min

Issued by

NWS Houston/Galveston, TX

Area

Whole counties

Counties Grimes County, TX, Washington County, TX

000 
TTAA00 KHOU 050215
FFWHOU
TXC185-477-050415-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
916 PM CDT TUE AUG 4 1998

THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  GRIMES COUNTY IN SOUTHEASTERN TEXAS
  WASHINGTON COUNTY IN SOUTHEASTERN TEXAS

* UNTIL 1115 PM CDT

* AT 910 PM... NATIONAL WEATHER SERVICE RADAR INDICATED A
  THUNDERSTORM WITH VERY HEAVY RAIN ALONG A LINE FROM SOMERVILLE TO
  WASHINGTON TO STONEHAM...LITTLE MOVEMENT WAS DETECTED.

*RADAR INDICATED 2 TO 4 INCHES OF RAIN ALREADY FELL OVER PORTIONS OF
WASHINGTON AND GRIMES COUNTY.  RAINFALL RATES OF 2.5 TO 3.5 INCHES
PER HOUR CAN BE EXPECTED WITH THESE STORMS WHICH COULD LEAD TO FLASH
FLOODING AND STREET FLOODING.  THE MAIN THREAT WILL BE ALONG A
INDEPENDENCE TO WQSHINGTON TO NAVASOTA TO PLANTERSVILLE LINE.

NAVASOTA POLICE REPORTED MINOR STREET FLOODING AT 858 PM.

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 Aug 4, 8:38 PM CDT, 38 minutes earlier.

SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
838 PM CDT TUE AUG 4 1998

LATEST SFC ANALYSIS SHOWS WEAK FRONT APPROACHING NRN ZONES WITH WEAK
SFC TROF OUT AHEAD LYING ACRS AREA.  BELIEVE RAIN COOLED AIR FROM
SCT AFTN/EVNG TSTMS...MAINLY OVER OUR NRN ZONES...WILL ALLOW FNT TO
SAG SWD INTO FA BY MRNG.  THIS PLUS OUTFLOWS WILL ACT AS NICE FOCUSES
FOR ANOTHER ROUND OF AFTN-EVNG TSTMS ON WED.  HOWEVER...EXPECT
WEDNESDAYS ROUND OF STORMS TO BE MORE WIDESPREAD WITH STRONG S/W
ENERGY CRNTLY SEEN ON WV LOOP OVR NEW MEXICO PROVIDING THE ADDED
KICKER AND NNW FLOW IN MID-UPR LVLS DRIVING ACITIVITY SOUTHWARD ACRS
MUCH OF FA.  BUT THEN IM STEPPING ON THE MIDNGT SHIFTS FCST
PROBLEM.

AS FOR TNGT...RADAR SHOWS ACTIVITY STILL HOLDING ON...MAINLY ACRS
NRN ZONES.  THIS IN AN AREA WHERE THE FRNT IS SAGGING ALNG WITH
CONVERGENCE FROM RMNTS OF SEA BREEZE.  WITH A LTL UPR LVL SUPPORT
THIS ACTIVITY CUD PERSIST BEYOND MDNGT.  WILL LEAVE 20% POPS IN ALL
NGT ACRS NRN ZONES AND TWEAK DOWN CNTRL AND COAST ZONES TO JUST
ISOLATED THRU TNGT.  NRN ZONES WILL LIKELY REMAIN MSTLY CLDY AS CRNT
CLDS WILL BE REPLACED BY ERLY MRNG LOW CLDS BY ARND 9-10Z.  THUS...
WILL REWORD NRN ZONES TO MSTLY CLDY TNGT AND KEEP WORDING OF PTLY
CLDY ACRS CNTRL AND COAST.  INLAND TMPS ARE CRNTLY RUNNING ABOUT 3
TO 4 DEGREES COOLER THEN LAST NGT AT THIS TIME SO WILL GO AHEAD AND
LEAVE COOLER FCSTED TMPS AS IS.  NO OTHER CHANGES ATTM.  39

PRELIMS...
CLL E/B B/E 076/097 073/093 2334
IAH B/B B/E 076/095 074/093 1334
GLS B/B B/E 083/091 080/090 1324

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.