Alert archive / Texas / Tornado Warnings in 2004
Tornado Warning 21, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this tornado warning at May 1, 2004, 8:50 AM CDT for Harris County, Texas. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 1, 2004, 8:50 AM CDT (13:50 UTC)
- Expired
- May 1, 2004, 9:30 AM CDT
- In force
- 40 min
- 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), 52 km from the middle of the area, began a volume at 13:54 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 1, 3:50 AM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 1.8 hours before the alert went out and 200 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
- 326 J/kg
- Mixed-layer CIN
- -239 J/kg
- Mixed-layer LCL
- 978 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 153 m²/s²
- 0-3 km storm-relative helicity
- 263 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 9.3
The text
As transmitted, in the capitals the NWS used until 2016.
000
WFUS54 KHGX 011350
TORHOU
TXC201-011430-
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
848 AM CDT SAT MAY 1 2004
THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A
* TORNADO WARNING FOR...
HARRIS COUNTY IN SOUTHEAST TEXAS
* UNTIL 930 AM CDT
* AT 845 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES
SOUTHWEST OF JERSEY VILLAGE...MOVING EAST AT 35 MPH.
* LOCATIONS IN THE PATH OF THE TORNADO INCLUDE HOOKS AIRPORT...
BUSH-INTERCONTINENTAL AIRPORT...TOMBALL...SPRING VALLEY...SPRING...
SHELDON...KINGWOOD...JACINTO CITY...HUMBLE...HOUSTON...HIGHLANDS...
HEDWIG VILLAGE...GALENA PARK...CROSBY...CLOVERLEAF...CHANNELVIEW...
BAYTOWN...BARRETT AND ALDINE.
THE PUBLIC REPORTED A POSSIBLE TORNADO NEAR TOMBALL.
RADAR INDICATED A STRONGER STORM DEVELOPING NEAR JERSEY
VILLAGE...WITH JERSEY VILLAGE AND ALDINE IN THE PATH.
PLEASE REPORT SEVERE WEATHER TO THE COUNTY SHERIFF...LOCAL POLICE...
OR DEPARTMENT OF PUBLIC SAFETY. THEY WILL RELAY YOUR REPORT TO THE
NATIONAL WEATHER SERVICE.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 AM CDT
SATURDAY MORNING FOR SOUTHEAST TEXAS.
LAT...LON 2983 9494 2969 9496 2969 9514 2979 9571
3008 9570 3015 9557 3002 9527 3014 9513
$$The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 4:38 AM CDT | Tornado Warning | HGX | Liberty | 52 min |
| May 1, 5:17 AM CDT | Severe Thunderstorm Warning | HGX | Montgomery | 43 min |
| May 1, 5:30 AM CDT | Tornado Warning | HGX | Liberty | 45 min |
| May 1, 8:43 AM CDT | Flash Flood Warning | HGX | Harris, Montgomery, Polk, San Jacinto | 107 min |
| May 1, 9:10 AM CDT | Special Marine Warning | HGX | 95 min | |
| May 1, 9:10 AM CDT | Special Marine Warning | HGX | 95 min | |
| May 1, 10:20 AM CDT | Severe Thunderstorm Warning | HGX | Chambers, Liberty | 55 min |
| May 1, 10:49 AM CDT | Special Marine Warning | HGX | 86 min | |
| May 1, 11:22 AM CDT | Special Marine Warning | HGX | 113 min | |
| May 1, 11:41 AM CDT | Tornado Warning | HGX | Galveston | 34 min |
| May 1, 11:44 AM CDT | Flash Flood Warning | HGX | Brazoria, Galveston | 2 hr |
| May 1, 11:58 AM CDT | Flash Flood Warning | HGX | Fort Bend, Harris, Liberty | 2 hr |
| May 1, 12:03 PM CDT | Flash Flood Warning | HGX | Polk, San Jacinto | 4 hr |
| May 1, 12:16 PM CDT | Special Marine Warning | HGX | 59 min | |
| May 1, 1:20 PM CDT | Special Marine Warning | HGX | 40 min |
Nearby
Tornado Warnings in Texas, 2004Every tornado warning in 2004Tornadoes in 2004
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.