Alert archive / Texas / Flash Flood Warnings in 2002
Flash Flood Warning 15, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this flash flood warning at Aug 15, 2002, 10:26 AM CDT for 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
- Aug 15, 2002, 10:26 AM CDT (15:26 UTC)
- Expired
- Aug 15, 2002, 1:15 PM CDT
- In force
- 3 hr
- Issued by
- NWS Houston/Galveston, TX
- Area
- Counties, with a storm outline in the text
County Harris County, TX
The radar
The Houston radar (KHGX), 25 km from the middle of the area, began a volume at 15:30 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.
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, 3.4 hours before the alert went out and 197 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
- 248 J/kg
- Mixed-layer CIN
- -45 J/kg
- Mixed-layer LCL
- 765 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 88 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 151526
FFWHOU
TXC201-151815-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1022 AM CDT THU AUG 15 2002
THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
HARRIS COUNTY IN SOUTHEAST TEXAS
* UNTIL 115 PM CDT
* AT 1020 AM CDT...DOPPLER RADAR INDICATED VERY HEAVY RAINFALL
REDEVELOPING OVER SOUTHEAST HARRIS COUNTY SOUTHWARD INTO BRAZORIA
COUNTY. THE STORMS WERE MOVING NORTH AT 20 MPH AND WILL TRAIN OVER
AREAS THAT HAVE RECEIVED 2 TO 3 INCHES OF RAIN ALREADY THIS MORNING.
AN ADDITIONAL 2 TO 4 INCHES OF RAINFALL IS EXPECTED BY 1 PM OVER
SOUTH AND SOUTHEAST HARRIS COUNTY.
* SIGNIFICANT FLOODING OF ROADWAYS AND SMALL STREAMS IS EXPECTED
OVER MUCH OF THE AREA EAST OF U.S. HIGHWAY 59. IF HEAVIER RAINFALL
DEVELOPS SIGNIFICANT RISES MAY ALSO OCCUR ON SOME OF THE BAYOUS.
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
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 2967 9496 2955 9514 2961 9524 2963 9546
2996 9529What 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 Aug 15, 9:55 AM CDT, 31 minutes earlier.
Area forecast discussion, Aug 15, 9:55 AM CDT, 31 minutes before
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
In the hours before
Special weather statement, Aug 15, 5:00 AM CDT, 5 hours 26 minutes before
TXZ178-179-199-200-210>214-226-227-235>238-152100- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 500 AM CDT THU AUG 15 2002 ...LOCALLY HEAVY RAINFALL THREAT CONTINUES TODAY PRIMARILY ALONG AND SOUTHEAST OF AN EL CAMPO TO HOUSTON TO CLEVELAND LINE... NUMEROUS SHOWERS AND THUNDERSTORMS ARE OCCURRING ALONG THE SOUTHEAST TEXAS COAST EARLY THIS MORNING. PORTIONS OF GALVESTON ISLAND HAVE RECEIVED OVER 5 INCHES OF RAIN SINCE MIDNIGHT. ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE WITH LOCALIZED AMOUNTS TO 4 OR 5 INCHES OVER THE NEXT 12 HOURS. BE ALERT FOR HIGH STANDING WATER ON ROADWAYS AND IN LOW LYING AREAS. MOTORISTS SHOULD REMEMBER NOT TO DRIVE INTO AREAS WHERE WATER COVERS THE ROADWAY. A STRONG UPPER LEVEL DISTURBANCE IN CONJUNCTION WITH ABUNDANT GULF MOISTURE IS PRODUCING THE RAIN. THE DISTURBANCE IS EXPECTED TO GRADUALLY WEAKEN LATER TONIGHT.
Local storm report, Aug 15, 6:07 AM CDT, 4 hours 19 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
507 AM CST THU AUG 15 2002
TIME(CST) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0455 AM CRYSTAL BEACH TX WIND DAMAGE
08/15/02 GALVESTON ROOF BLOWN OFF A HOUSE
AND POWERLINES BLOWN
DOWN. OTHER STRUCTURAL
DAMAGE IN THE AREA.
REPORTED BY EMERGENCY
MANAGEMENT.Local storm report, Aug 15, 6:10 AM CDT, 4 hours 16 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
610 AM CDT THU AUG 15 2002
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0455 AM CRYSTAL BEACH TX WIND DAMAGE
08/15/02 GALVESTON ROOF BLOWN OFF A HOUSE
AND POWERLINES BLOWN
DOWN. OTHER STRUCTURAL
DAMAGE IN THE AREA.
REPORTED BY EMERGENCY
MANAGEMENT.The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 1:55 AM CDT | Special Marine Warning | HGX | 2 hr | |
| Aug 15, 3:47 AM CDT | Flash Flood Warning | HGX | Brazoria, Galveston | 118 min |
| Aug 15, 4:00 AM CDT | Special Marine Warning | HGX | 2 hr | |
| Aug 15, 4:33 AM CDT | Severe Thunderstorm Warning | HGX | Galveston | 5 hr |
| Aug 15, 5:48 AM CDT | Flash Flood Warning | HGX | Brazoria, Galveston | 2 hr |
| Aug 15, 7:28 AM CDT | Special Marine Warning | HGX | 62 min | |
| Aug 15, 7:43 AM CDT | Flash Flood Warning | HGX | Galveston | 107 min |
| Aug 15, 8:22 AM CDT | Special Marine Warning | HGX | 53 min | |
| Aug 15, 8:47 AM CDT | Severe Thunderstorm Warning | HGX | Harris | 34 hr |
| Aug 15, 9:13 AM CDT | Special Marine Warning | HGX | 2 hr | |
| Aug 15, 10:34 AM CDT | Flash Flood Warning | HGX | Grimes, Waller, Washington | 3 hr |
| Aug 15, 11:10 AM CDT | Flash Flood Warning | HGX | Brazoria, Galveston | 3 hr |
| Aug 15, 11:13 AM CDT | Special Marine Warning | HGX | 2 hr | |
| Aug 15, 11:37 AM CDT | Tornado Warning | HGX | Galveston | 23 min |
| Aug 15, 11:59 AM CDT | Tornado Warning | HGX | Galveston | 31 min |
| Aug 15, 1:14 PM CDT | Flash Flood Warning | HGX | Grimes, Waller, Washington | 3 hr |
| Aug 15, 1:19 PM CDT | Special Marine Warning | HGX | 116 min | |
| Aug 15, 1:45 PM CDT | Flash Flood Warning | HGX | Brazoria, Galveston, Harris | 3 hr |
| Aug 15, 3:47 PM CDT | Flash Flood Warning | HGX | Waller, Washington | 2 hr |
| Aug 15, 3:55 PM CDT | Flash Flood Warning | HGX | Harris | 3 hr |
| Aug 15, 4:51 PM CDT | Flash Flood Warning | HGX | Brazoria, Galveston | 3 hr |
| Aug 15, 6:10 PM CDT | Special Marine Warning | HGX | 2 hr | |
| Aug 15, 6:10 PM CDT | Special Marine Warning | HGX | 2 hr |
Nearby
Flash Flood Warnings in Texas, 2002Every flash flood warning in 2002
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; radar from the NEXRAD Level II archive.