Flash Flood Warning 64, NWS Houston/Galveston, TX

Issued

Dec 4, 2002, 5:02 AM CST (11:02 UTC)

Expired

Dec 4, 2002, 7:00 AM CST

In force

118 min

Issued by

NWS Houston/Galveston, TX

Area

Counties, with a storm outline in the text

Counties Brazoria County, TX, Galveston County, TX, Harris County, TX

The Houston radar (KHGX), 9 km from the middle of the area, began a volume at 11:04 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 041102
FFWHOU
TXC039-167-201-041300-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
501 AM CST WED DEC 4 2002

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  HARRIS COUNTY IN SOUTHEAST TEXAS
  BRAZORIA COUNTY IN SOUTHEAST TEXAS
  GALVESTON COUNTY IN SOUTHEAST TEXAS

* UNTIL 700 AM CST

* AT 454 AM CST...DOPPLER RADAR INDICATED A WIDE BAND OF VERY 
  HEAVY RAINFALL EXTENDING FROM ANGELTON TO LEAGUE CITY. RAINFALL 
  RATES WITHIN THIS BAND COULD APPROACH 2 INCHES PER HOUR IN SOME 
  AREAS. ALL OF THIS RAIN WILL BE MOVING VERY SLOWLY TO THE 
  NORTHEAST DURING THE NEXT HOUR OR SO.


* FLOODING IS EXPECTED IN OR NEAR...
  JOHNSON SPACE CENTER...ELLINGTON FIELD...WEBSTER...TEXAS CITY
  DICKINSON...FRIENDSWOOD...LEAGUE CITY

DO NOT CROSS ANY LOCATION WHERE WATER COVERS THE ROAD

SMALL CREEKS...STREAMS...BAYOUS...UNDERPASSES...AND FEEDER ROADS MAY
FLOOD QUICKLY. AVOID LOCATIONS WATER COVERS THE GROUND

USE EXTRA CAUTION AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DEPTH
AND SPEED OF FLASH 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 2970 9498 2950 9489 2936 9499 2903 9543
          2928 9567 2950 9535 2961 9518 2972 9506

NWS Houston/Galveston, TX wrote its last area forecast discussion before this flash flood warning went out at Dec 4, 2:48 AM CST, 2 hours 14 minutes earlier.

SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
248 AM CST WED DEC 4 2002

SQUALL LINE/COLD FRONT MAKING FAIRLY GOOD PROGRESS ACROSS THE CWA
THUS FAR THIS MORNING. CURRENT EXTRAPOLATIONS WOULD PUT THIS LINE
JUST PAST IAH AOA 15Z...TO THE COAST AOA 18Z. DRY SLOTTING BEHIND
THIS ENTIRE WX SYSTEM ALSO APPEARS TO BE MAKING SOME DECENT HEAD-
WAY IN THIS DIRECTION. MAY HAVE TO MAKE SOME ADJUSTMENTS TO CLOUD
COVER FOR THIS AFTN/EVENING TO ACCOUNT FOR THIS. POST EVENT PROGS
STILL LOOK QUIET AS THE STRONG RIDGE BUILDING DOWN THE SRN PLAINS
SETTLES OVER THE STATE. A NORTHERLY LOW-LVL FLOW SHOULD REMAIN IN
PLACE OVER SE TX THROUGH AT LEAST EARLY FRI BEFORE WINDS START TO
TURN IN RESPONSE TO THE NEXT UPPER TROF/SFC LOW COMBINATION WHICH
IS PROGGED TO CARVE OUT A VERY SIMILAR PATH INTO THE REGION LATE
SUN INTO MON. THERE IS STILL QUITE A BIT OF UNCERTAINTY WITH THE
LONG-RANGE GUIDANCE WITH THE EVOLUTION OF EVENTS DURING THIS TIME
FRAME SO WILL LIKELY KEEP THE WORDING CLOSE TO AS IS FOR NOW. BIG
COOLDOWN STILL EXPECTED TODAY WITH TEMPS PROBABLY FALLING/HOLDING
STEADY THROUGH THE AFTN HOURS. WILL DROP THE FLASH FLOOD WATCH IN
THE NEXT PACKAGE. 41/47/45

.HGX...SCA BAYS AND 00-60NM WATERS.

PRELIMS...
CLL WB 050/034 050/031 053 600
IAH TB 060/037 051/033 053 800
GLS TB 067/043 051/040 053 +-0

GMZ300-330-335-350-355-370-375-TXZ163-164-176>179-195>200-210>214-226
-227-235>238-041330-

HAZARDOUS WEATHER OUTLOOK...RETRANSMITTED
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
450 PM CST TUE DEC 3 2002

...HEAVY RAINFALL AND SEVERE THUNDERSTORMS POSSIBLE TONIGHT AND
EARLY WEDNESDAY...

.DAY ONE...
.TONIGHT...NUMEROUS SHOWERS AND THUNDERSTORMS...POSSIBLY EVOLVING
INTO A SQUALL LINE...ARE EXPECTED TO DEVELOP THIS EVENING AS A
STRONG UPPER LEVEL DISTURBANCE INTERACTS WITH A SOUTHWARD MOVING
COLD FRONT. AGAIN...HEAVY RAINFALL AND FLASH FLOODING APPEAR TO BE
THE MAIN WEATHER THREAT. HOWEVER DUE TO THE STRONG TURNING WINDS
ALOFT...DAMAGING WINDS AND ISOLATED TORNADOES ARE ALSO POSSIBLE.

RAINFALL AMOUNTS THROUGH TONIGHT ARE EXPECTED TO AVERAGE 1 TO 2
INCHES WITH LOCALIZED 3 TO 5 INCH AMOUNTS POSSIBLE.

.SPOTTER CALL TO ACTION STATEMENT...SPOTTER ACTIVATION MAY BE
REQUIRED LATER TONIGHT.

.DAYS TWO THROUGH SEVEN...
.WEDNESDAY...HEAVY RAIN WILL PERSIST MAINLY ALONG THE COASTAL AREAS
OF SOUTHEAST TEXAS WEDNESDAY MORNING.

.THURSDAY THROUGH TUESDAY...
ANOTHER STORM SYSTEM SHOULD DEVELOP OVER THE WESTERN U.S. LATE IN
THE WEEK AND MOVE INTO SOUTHEAST TEXAS ON SUNDAY. THIS SHOULD GIVE
THE REGION ANOTHER CHANCE OF THUNDERSTORMS.

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.