Alert archive / Texas / Flash Flood Warnings in 2002
Flash Flood Warning 36, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this flash flood warning at Sep 8, 2002, 1:25 PM 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
- Sep 8, 2002, 1:25 PM CDT (18:25 UTC)
- Expired
- Sep 8, 2002, 4:15 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), 31 km from the middle of the area, began a volume at 18:26 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, 6.4 hours before the alert went out and 195 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
- 780 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 572 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 160 m²/s²
- 0-3 km storm-relative helicity
- 168 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 081825 FFWHOU TXC201-082115- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 125 PM CDT SUN SEP 8 2002 THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A * FLASH FLOOD WARNING FOR... HARRIS COUNTY IN SOUTHEAST TEXAS * UNTIL 415 PM CDT * AT 120 PM CDT...DOPPLER RADAR INDICATED VERY HEAVY RAINFALL CONTINUED TO FALL OVER EASTERN HARRIS COUNTY. ANOTHER 1 TO 2 INCHES OF RAIN IS POSSIBLE BY 3 PM. FLOODING WAS REPORTED NEAR RED BLUFF AND FAIRMONT IN PASADENA AND THE INTERSECTION OF CENTER STREET AND P STREET WAS UNDER WATER IN DEER PARK. * FLOODING IS EXPECTED IN OR NEAR... DEER PARK...SHELDON...PASADENA...JACINTO CITY 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 2972 9526 2957 9514 2979 9501 2990 9521
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 Sep 8, 9:45 AM CDT, 3 hours 40 minutes earlier.
Area forecast discussion, Sep 8, 9:45 AM CDT, 3 hours 40 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
945 AM CDT SUN SEP 8 2002
A LARGE AREA OF SHRA/TSRA ONGOING THIS MORNING. SEVERAL OF THE
STORMS HAVE SHOWN SIGNS OF ROATATION. MORNING SOUNDINGS SHOW PWS
AOA 2.3 INCHES...K INDICES IN THE UPPER 30S AND HELICITY VALUES
150-200. 13Z ANALYSIS SHOWS A WEAK SFC BOUNDARY DRAPED ACROSS THE
REGION VCT TO LFT AND SFC STREAMLINES SHOW STRONG CONFLUENCE ACROSS
SE TX. 85H DEW PTS ARE 16 C AND 85H WINDS ARE SLIGHTLY CONFLUENT AS
WELL. BEST 85H INFLOW LIES ALONG A LCH TO OUN LINE. IR IMAGERY
REVEALS A NICE FETCH OF MSTR LINING UP FROM CHAMBERS COUNTY
SOUTHEAST INTO THE GULF. THIS AREA OF MSTR LOOKS LIKE IT WILL STREAM
INLAND AND AFFECT THE NE ZONES LATER THIS AFTERNOON. NO CHANGES TO
CURRENT FORECAST. MAYBE AN UPDATE LATER IF MESO-BNDRYS WREAK HAVOC.
43/47
.HGX...FLASH FLOOD WATCH THROUGH TONIGHT.
SCA GULF WATERS.
PRELIMS...
CLL TT 086/075 088/074 091 874
IAH TT 085/076 087/075 089 976
GLS TT 085/080 086/080 086 965The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 8, 9:00 AM CDT | Special Marine Warning | HGX | 30 min | |
| Sep 8, 9:33 AM CDT | Special Marine Warning | HGX | 57 min | |
| Sep 8, 9:47 AM CDT | Flash Flood Warning | HGX | Liberty | 118 min |
| Sep 8, 11:35 AM CDT | Flash Flood Warning | HGX | Liberty | 3 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.