Alert archive / Texas / Tornado Watches in 1998
Tornado Watch 824
The Storm Prediction Center issued this tornado watch at Sep 11, 1998, 4:30 AM CDT for 9 parishes in Louisiana; 35 counties in Texas. It was in force for 9 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 11, 1998, 4:30 AM CDT (09:30 UTC)
- Expired
- Sep 11, 1998, 1:00 PM CDT
- In force
- 9 hr
- Issued by
- the Storm Prediction Center
All 44 counties
Acadia Parish, LA, Allen Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Evangeline Parish, LA, Jefferson Davis Parish, LA, Vermilion Parish, LA, Vernon Parish, LA, Austin County, TX, Bastrop County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Caldwell County, TX, Chambers County, TX, Colorado County, TX, Fayette County, TX, Fort Bend County, TX, Galveston County, TX, Gonzales County, TX, Grimes County, TX, Hardin County, TX, Harris County, TX, Jackson County, TX, Jasper County, TX, Jefferson County, TX, Lavaca County, TX, Lee County, TX, Liberty County, TX, Matagorda County, TX, Montgomery County, TX, Newton County, TX, Orange County, TX, Polk County, TX, Sabine County, TX, San Jacinto County, TX, Travis County, TX, Tyler County, TX, Victoria County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX
The radar
The Houston radar (KHGX), 79 km from the middle of the area, began a volume at 09:29 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.
Warnings issued inside it
13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 5:09 AM CDT | Flash Flood Warning | EWX | DeWitt, Gonzales, Lavaca | 5 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, 7:24 AM CDT | Tornado Warning | LCH | Cameron | 46 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, 8:53 AM CDT | Flash Flood Warning | EWX | Bastrop, Lee, Travis, Williamson | 4 hr |
| Sep 11, 8:58 AM CDT | Flash Flood Warning | HGX | Harris | 6 hr |
| Sep 11, 10:53 AM CDT | Tornado Warning | LCH | Jefferson Davis | 47 min |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 9.5 hours before the alert went out and 221 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
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
Nearby
Tornado Watches in Texas, 1998Tornado Watches in Louisiana, 1998Every tornado watch 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.