Alert archive / Texas / Flash Flood Warnings in 2003
Flash Flood Warning 39, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this flash flood warning at Nov 17, 2003, 9:38 PM CST for Brazoria County, Galveston 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
- Nov 17, 2003, 9:38 PM CST (03:38 UTC)
- Expired
- Nov 18, 2003, 12:45 AM CST
- In force
- 3 hr
- 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 radar
The Houston radar (KHGX), 19 km from the middle of the area, began a volume at 03:41 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.
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 3.6 hours before the alert went out and 190 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
- 877 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 631 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 200 m²/s²
- 0-3 km storm-relative helicity
- 222 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 7.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS54 KHGX 180340
FFWHOU
TXC039-167-201-180645-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
938 PM CST MON NOV 17 2003
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 1245 AM CST
* AT 936 PM CST...VERY HEAVY RAIN WAS FALLING FROM A BAND OF
THUNDERSTORMS MOVING NORTHEAST THROUGH THE REGION. RAINFALL RATES OF
1 TO 2 INCHES PER HOUR WILL BE COMMONPLACE.
* FLOODING IS EXPECTED IN OR NEAR...
JOHNSON SPACE CENTER...HOBBY AIRPORT...ELLINGTON
FIELD...WEBSTER...FRIENDSWOOD...PEARLAND
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 2974 9495 2969 9500 2953 9499 2925 9530
2952 9538 3004 9505
$$The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 17, 6:01 PM CST | Tornado Warning | HGX | Chambers, Liberty | 44 min |
| Nov 17, 6:19 PM CST | Flash Flood Warning | HGX | Liberty | 3 hr |
| Nov 17, 6:23 PM CST | Flash Flood Warning | HGX | Harris | 3 hr |
| Nov 17, 8:26 PM CST | Tornado Warning | HGX | Harris | 34 min |
| Nov 17, 8:28 PM CST | Tornado Warning | HGX | Brazoria, Galveston | 32 min |
| Nov 17, 8:32 PM CST | Tornado Warning | HGX | Harris | 28 min |
| Nov 17, 9:06 PM CST | Tornado Warning | HGX | Galveston, Harris | 24 min |
| Nov 17, 10:09 PM CST | Tornado Warning | HGX | Liberty | 36 min |
| Nov 17, 11:16 PM CST | Special Marine Warning | HGX | 89 min | |
| Nov 17, 11:26 PM CST | Tornado Warning | HGX | Chambers | 49 min |
| Nov 18, 12:52 AM CST | Special Marine Warning | HGX | 113 min |
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; radar from the NEXRAD Level II archive.