Alert archive / Texas / Tornado Warnings in 1998
Tornado Warning 39, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this tornado warning at Sep 11, 1998, 1:29 AM CDT for Galveston County, Harris County, Texas. It was in force for 66 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 11, 1998, 1:29 AM CDT (06:29 UTC)
- Expired
- Sep 11, 1998, 2:35 AM CDT
- In force
- 66 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties
Counties Galveston County, TX, Harris County, TX
The radar
The Houston radar (KHGX), 12 km from the middle of the area, began a volume at 06:29 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, 6.5 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
- 26 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 452 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 273 m²/s²
- 0-3 km storm-relative helicity
- 445 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KHOU 110629 RRA TORHOU TXC167-201-110730- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 129 AM CDT FRI SEP 11 1998 THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON HAS ISSUED A * TORNADO WARNING FOR... NORTHWESTERN GALVESTON COUNTY IN SOUTHEASTERN TEXAS SOUTHERN HARRIS COUNTY IN SOUTHEASTERN TEXAS * UNTIL 235 AM CDT * AT 127 AM CDT... WEATHER RADAR INDICATED A TORNADIC THUNDERSTORM IN THE VICINITY OF TEXAS CITY MOVING NORTHWEST AT 30 MPH. * THIS TORNADO IS EXPECTED TO BE NEAR... TEXAS CITY BY 127 AM CDT SAN LEON BY 130 AM CDT BACLIFF BY 140 AM CDT KEMAH BY 150 AM CDT LEAGUE CITY BY 150 AM CDT A SECOND TORNADIC STORM WAS INDICATE~D 1 NM NORTHEAST OF THE BOLIVAR PENINSULA...MOVING NORTHWEST AT 30 MPH IF YOU ARE IN THESE AREAS... SEEK SAFETY IN A SMALL INTERIOR ROOM AWAY FROM WINDOWS.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 7:13 PM CDT | Flash Flood Warning | HGX | Galveston | 4 hr |
| Sep 10, 8:02 PM CDT | Tornado Warning | HGX | Brazoria, Galveston | 63 min |
| Sep 10, 10:09 PM CDT | Flash Flood Warning | HGX | Brazoria, Matagorda, Wharton | 4 hr |
| Sep 10, 10:09 PM CDT | Flash Flood Warning | HGX | Fort Bend | 4 hr |
| Sep 11, 12:09 AM CDT | Flash Flood Warning | HGX | Galveston | 4 hr |
| Sep 11, 2:03 AM CDT | Flash Flood Warning | HGX | Brazoria, Fort Bend, Harris | 4 hr |
| Sep 11, 3:31 AM CDT | Tornado Warning | HGX | Galveston | 64 min |
| Sep 11, 4:01 AM CDT | Flash Flood Warning | HGX | Galveston | 4 hr |
| Sep 11, 4:31 AM CDT | Tornado Warning | HGX | Harris | 64 min |
| Sep 11, 4:39 AM CDT | Flash Flood Warning | HGX | Jackson | 4 hr |
| Sep 11, 5:32 AM CDT | Flash Flood Warning | HGX | Grimes, Montgomery, Waller | 4 hr |
| Sep 11, 5:54 AM CDT | Flash Flood Warning | HGX | Harris | 4 hr |
| Sep 11, 6:06 AM CDT | Tornado Warning | HGX | Fort Bend | 64 min |
| Sep 11, 6:18 AM CDT | Tornado Warning | HGX | Harris | 62 min |
| Sep 11, 7:49 AM CDT | Flash Flood Warning | HGX | Brazoria, Galveston | 4 hr |
| Sep 11, 7:49 AM CDT | Flash Flood Warning | HGX | Fort Bend | 4 hr |
| Sep 11, 8:58 AM CDT | Flash Flood Warning | HGX | Harris | 6 hr |
Nearby
Tornado Warnings in Texas, 1998Every tornado warning in 1998Tornadoes in 1998
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.