Alert archive / Texas / Flash Flood Warnings in 2003
Flash Flood Warning 9, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this flash flood warning at Jul 15, 2003, 8:42 AM CDT for Chambers County, Harris County, Texas. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 15, 2003, 8:42 AM CDT (13:42 UTC)
- Expired
- Jul 15, 2003, 11:45 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, Harris County, TX
Did it verify
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.
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 1.7 hours before the alert went out and 193 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1103 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 661 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -31 m²/s²
- 0-3 km storm-relative helicity
- -6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS54 KHGX 151341
FFWHOU
TXC071-201-151645-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
842 AM CDT TUE JUL 15 2003
THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
HARRIS COUNTY IN SOUTHEAST TEXAS
CHAMBERS COUNTY IN SOUTHEAST TEXAS
* UNTIL 1145 AM CDT
* AT 831 AM CDT...DOPPLER RADAR INDICATED A BAND OF VERY HEAVY
THUNDERSTORMS ASSOCIATED WITH CLAUDETTE...FROM ANAHUAC TO DOWNTOWN
HOUSTON. RAINFALL AMOUNTS OF 3 TO 4 INCHES HAVE FALLEN FROM DEER
PARK EASTWARD THROUGH CHAMBERS COUNTY. ADDITIONAL RAINFALL AMOUNTS
OF 1 TO 3 INCHES ARE LIKELY WITH THIS BAND AS IT MOVES WEST AT
40 MPH.
* FLOODING IS EXPECTED IN OR NEAR...
HOUSTON METRO AREA...DOWNTOWN HOUSTON...INTERSTATE 45
SOUTH...INTERSTATE 10 EAST...THE MEDICAL CENTER...CLEAR
LAKE...DEER PARK...PASADENA...MONT BELVIEU...ANAHUAC...OAK ISLAND
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 3010 9559 2974 9563 2963 9546 2963 9528
2956 9517 2964 9439 2990 9444 2987 9498
3013 9515 3001 9524
$$What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Houston/Galveston, TX wrote its last area forecast discussion before this flash flood warning went out at Jul 15, 6:51 AM CDT, 1 hour 51 minutes earlier.
Area forecast discussion, Jul 15, 6:51 AM CDT, 1 hour 51 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
651 AM CDT TUE JUL 15 2003
UPDATE DISC...
SPC HAS ISSUED A TORNADO WATCH EFFECTIVE UNTIL 1 PM. CURRENT RADAR
INDICATES A POSSIBLE TORNADO ASSOCIATED WITH A RAIN BAND MOVING INTO
HIGH ISLAND AND CHAMBERS COUNTY. CAN EXPECT THIS TYPE OF ACTIVITY
INTO THIS AFTERNOON AS THE FAVORED NORTHEAST QUADRANT OF THE STORM
MOVES ACROSS THE TWO TIER OF COUNTIES ALONG THE COAST.
PREV DISC...
HAVE ALREADY UPDATE THE FLOOD WATCH TO INCLUDE ALL OF THE SOUTHERN
HALF OF SE TX. HURRICANE CLAUDETTE HAS BEEN MOVING ALMOST DUE WEST
OVER THE PAST COUPLE OF HOURS. RAIN BANDS HAVE MOVED ONTO THE COASTAL
COUNTIES WITH A HEAVIER BAND CURRENTLY JUST OFF THE COAST. THE MAIN
CONCERNS FOR THIS MORNING INCLUDE HIGH WINDS...HEAVY RAINFALL...AND
ISOLATED TORNADOES. AS CLAUDETTE GETS CLOSER TO THE COAST...THE
SYSTEM WILL MORE AND MORE BE INFLUENCED BY THE 200 AND 300 MB TROUGH
LOCATED JUST INLAND ACROSS THE ENTIRE TX COASTAL PLAIN.
THE COMBINATION OF THE MID AND UPPER LEVEL FLOW AND THE CURRENT STORM
MOVEMENT IN RELATION TO THE COAST INDICATES THAT THE STORM CENTER MAY
ACTUALLY TRY TO GO WEST-SOUTHWEST BEFORE MAKING LANDFALL. THE MASS OF
RAIN BANDS JUST OFF THE COAST SHOULD ALSO MOVE INLAND AND AFFECT THE
NORTHERN COUNTIES. FOR NOW THE RAINFALL POTENTIAL LOOKS TO BE 2 TO 6
INCHES WITH ISOLATED 10 INCHES...THOUGH WITH THE SYSTEM SPEEDING UP
THESE MAY BE ON THE HIGH SIDE. FAVORED AREAS FOR ISOLATED TORNADOES
LOOK TO BE ACROSS CHAMBERS...GALVESTON...HARRIS...BRAZORIA...FORT
BEND...MATAGORDA...AND JACKSON COUNTIES. EXPECTING THE WORST WINDS
OVER THE COASTAL COUNTIES THROUGHOUT THE MORNING...THEN INTO THE FAR
SOUTHERN COUNTIES INTO EARLY AFTERNOON AS THE STORM CENTER GETS
ONSHORE.
AFTER CLAUDETTE TODAY THE RIDGE TO THE NORTH BUILDS ACROSS THE
PLAINS. BY THIS WEEKEND THE ECMWF AND GFS INDICATE EASTERLY FLOW
ACROSS SE TX. FOR THAT CASE WILL GO WITH SCATTERED POPS STARTING
SATURDAY. UNTIL THEN THE RIDGE SHOULD SUPPRESS RAINFALL TO ISOLATED
AT BEST.
.HGX...HURRICANE WARNING COASTAL COUNTIES PLUS HARRIS AND LIBERTY.
INLAND TROPICAL STORM WIND WARNING WHARTON...COLORADO...
AUSTIN...WALLER...AND FORT BEND COUNTIES.
FLOOD WATCH ALONG AND SOUTH OF INTERSTATE 10.
SMALL CRAFT SHOULD STAY IN PORT.
PL-40
45
38/43/30Hazardous weather outlook, Jul 15, 7:29 AM CDT, 1 hour 13 minutes before
GMZ330-335-TXZ163-164-176>179-195>200-210>214-226-227-235>238-152100- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 729 AM CDT TUE JUL 15 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST TEXAS. ...A HURRICANE WARNING IS IN EFFECT FROM HIGH ISLAND TO BAFFIN BAY... THE WARNING AREA INCLUDES THE COUNTIES OF CHAMBERS...HARRIS... GALVESTON...BRAZORIA...LIBERTY...MATAGORDA...AND JACKSON COUNTIES. ...A FLOOD WATCH IS IN EFFECT FOR THE SOUTHERN HALF OF SOUTHEAST TEXAS... ...AN INLAND TROPICAL STORM WIND WARNING IS IN EFFECT FOR AUSTIN... COLORADO...WHARTON...AND FORT BEND COUNTIES... ...A TORNADO WATCH IS IN EFFECT UNTIL 1 PM FOR BRAZORIA...GALVESTON... JACKSON...MATAGORDA...CHAMBERS...FORT BEND...HARRIS...LIBERTY...AND WHARTON COUNTIES... .DAY ONE...TODAY AND TONIGHT. HURRICANE CLAUDETTE WILL MAKE LANDFALL NEAR MATAGORDA BAY BETWEEN 9 AM AND 3 PM TODAY. ISOLATED TORNADOES ARE POSSIBLE ACROSS THE COASTAL AREAS AS THE STORM MAKES LANDFALL. OTHERWISE...REFER TO THE HURRICANE LOCAL STATEMENT...SATHLSHOU...WMO HEADER WTUS84 KHGX. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS POSSIBLE TODAY. SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME FOR WEDNESDAY THROUGH MONDAY.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 6:41 AM CDT | Tornado Warning | HGX | Chambers, Galveston | 49 min |
| Jul 15, 6:43 AM CDT | Special Marine Warning | HGX | 62 min | |
| Jul 15, 10:00 AM CDT | Flash Flood Warning | HGX | Brazoria, Fort Bend, Galveston, Jackson, Matagorda, Wharton | 3 hr |
| Jul 15, 12:52 PM CDT | Flash Flood Warning | HGX | Brazoria, Jackson, Matagorda, Wharton | 3 hr |
Nearby
Flash Flood Warnings in Texas, 2003Every flash flood warning in 2003
Sources
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.