Alert archive / Texas / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 49, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 21, 1997, 3:47 AM CDT for Bastrop County, Travis County, Williamson County, Texas. It was in force for 58 min. 3 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
- Apr 21, 1997, 3:47 AM CDT (08:47 UTC)
- Expired
- Apr 21, 1997, 4:45 AM CDT
- In force
- 58 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
Counties Bastrop County, TX, Travis County, TX, Williamson County, TX
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 21, 3:47 AM CDT | Thunderstorm Wind 62 | Taylor, TX | |
| Apr 21, 3:50 AM CDT | Hail 0.75 | Round Rock, TX | |
| Apr 21, 4:00 AM CDT | Hail 0.75 | Rockne, 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, 8.8 hours before the alert went out and 276 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
- 406 J/kg
- Mixed-layer CIN
- -150 J/kg
- Mixed-layer LCL
- 1725 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 114 m²/s²
- 0-3 km storm-relative helicity
- 277 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSAT 210848 RRA SVRSAT TXC021-453-491-210945- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 347 AM CDT MON APR 21 1997 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 445 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTH CENTRAL TEXAS ...BASTROP COUNTY...TRAVIS COUNTY...WILLIAMSON COUNTY AT 345 AM DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR LEANDER IN WILLIAMSON COUNTY. THE STORM IS MOVING SOUTHEAST AT 20 MPH AND WILL BE IN NORTHERN PORTIONS OF THE CITY OF AUSTIN NEAR 4 AM. PEOPLE IN THE PATH OF THIS STORM SHOULD BE ALERT TO THE POSSIBILITY OF LARGE HAIL AND DAMAGING WINDS. FREQUENT LIGHTNING AND LOCALLY HEAVY RAIN CAN ALSO OCCUR WITH SEVERE THUNDERSTORMS...FLOODING SMALL STREAMS...LOW AREAS...AND LOW WATER CROSSINGS. IF YOU SEE SEVERE WEATHER TAKING PLACE...CALL YOUR REPORT TO THE NEAREST LBAW ENFORCEMENT AGENCY FOR IMMEDIATE RELAY TO THE NATIONAL WEATHER SERVICE.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 20, 8:07 PM CDT | Severe Thunderstorm Warning | EWX | Burnet, Llano | 53 min |
| Apr 20, 8:57 PM CDT | Severe Thunderstorm Warning | EWX | Blanco, Comal, Hays, Kendall | 63 min |
| Apr 20, 9:17 PM CDT | Severe Thunderstorm Warning | EWX | Travis | 58 min |
| Apr 20, 9:31 PM CDT | Severe Thunderstorm Warning | EWX | Williamson | 44 min |
| Apr 20, 10:14 PM CDT | Severe Thunderstorm Warning | EWX | Guadalupe | 46 min |
| Apr 20, 11:17 PM CDT | Severe Thunderstorm Warning | EWX | Lavaca | 43 min |
Nearby
Severe Thunderstorm Warnings in Texas, 1997Every severe thunderstorm warning in 1997
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.