Alert archive / Texas / Severe Thunderstorm Warnings in 1996
Severe Thunderstorm Warning 137, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Sep 20, 1996, 7:46 PM CDT for Travis County, Williamson County, Texas. It was in force for 3 hr. 5 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Sep 20, 1996, 7:46 PM CDT (00:46 UTC)
- Expired
- Sep 20, 1996, 10:45 PM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
Counties Travis County, TX, Williamson County, TX
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 20, 8:58 PM CDT | Tornado F1 | Lago Vista, TX | |
| Sep 20, 9:35 PM CDT | Hail | South Part, TX | |
| Sep 20, 9:35 PM CDT | Thunderstorm Wind 61 | South Part, TX | |
| Sep 20, 9:35 PM CDT | Hail 2 | North Portion, TX | |
| Sep 20, 9:55 PM CDT | Thunderstorm Wind | Southeast Austin, TX |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 0.8 hours before the alert went out and 263 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
- 1680 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 961 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 125 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 4.9
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 20, 7:46 PM CDT | Flash Flood Warning | EWX | Travis, Williamson | 3 hr |
| Sep 20, 7:56 PM CDT | Severe Thunderstorm Warning | EWX | Burnet | 64 min |
| Sep 20, 8:18 PM CDT | Tornado Warning | EWX | Burnet, Travis | 57 min |
| Sep 20, 8:56 PM CDT | Tornado Warning | EWX | Travis | 64 min |
| Sep 20, 9:16 PM CDT | Severe Thunderstorm Warning | EWX | Hays | 59 min |
| Sep 20, 9:33 PM CDT | Severe Thunderstorm Warning | EWX | Bastrop, Lee | 117 min |
| Sep 20, 10:10 PM CDT | Severe Thunderstorm Warning | EWX | Hays | 65 min |
| Sep 20, 10:31 PM CDT | Severe Thunderstorm Warning | EWX | Caldwell | 59 min |
| Sep 20, 10:50 PM CDT | Severe Thunderstorm Warning | EWX | Comal, Guadalupe | 55 min |
| Sep 21, 12:08 AM CDT | Severe Thunderstorm Warning | EWX | Lavaca | 52 min |
| Sep 21, 12:09 AM CDT | Tornado Warning | EWX | Lavaca | 51 min |
| Sep 21, 12:40 AM CDT | Tornado Warning | EWX | DeWitt | 65 min |
Nearby
Severe Thunderstorm Warnings in Texas, 1996Every severe thunderstorm warning in 1996
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.