Alert archive / Texas / Tornado Warnings in 1998
Tornado Warning 10, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this tornado warning at Feb 18, 1998, 6:03 PM CST for Atascosa County, Texas. It was in force for 42 min. 1 report 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
- Feb 18, 1998, 6:03 PM CST (00:03 UTC)
- Expired
- Feb 18, 1998, 6:45 PM CST
- In force
- 42 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Atascosa County, TX
The radar
The Austin/San Antonio radar (KEWX), 102 km from the middle of the area, began a volume at 00:06 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Feb 18, 6:38 PM CST | Hail 0.75 | Campbellton, 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
Corpus Christi, TX (KCRP), launched 00:00Z, 0.1 hours before the alert went out and 174 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
- 274 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 794 m above ground
- 0-6 km bulk shear
- 82 kt
- 0-1 km storm-relative helicity
- 175 m²/s²
- 0-3 km storm-relative helicity
- 127 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSAT 190003 RRA TORSAT TXC013-190045- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 603 PM CST WED FEB 18 1998 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 645 PM CST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL TEXAS ...ATASCOSA COUNTY AT 600 PM...RADAR INDICATED A TORNADIC THUNDERSTORM BETWEEN JOURDANTON AND CHRISTINE MOVING EAST SOUTHEAST AT 25 MPH. CAMPBELLTON IS IN THE PATH OF THIS STORM. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...SEEK SHELTER IN A DITCH OR LOW SPOT AND COVER YOUR HEAD.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 18, 6:04 PM CST | Tornado Warning | EWX | Wilson | 41 min |
| Feb 18, 6:17 PM CST | Severe Thunderstorm Warning | EWX | Llano | 58 min |
| Feb 18, 6:29 PM CST | Severe Thunderstorm Warning | EWX | Karnes | 46 min |
| Feb 18, 6:43 PM CST | Tornado Warning | EWX | Karnes | 62 min |
| Feb 18, 6:49 PM CST | Severe Thunderstorm Warning | EWX | Bastrop | 56 min |
| Feb 18, 6:54 PM CST | Severe Thunderstorm Warning | EWX | Burnet | 66 min |
| Feb 18, 7:03 PM CST | Severe Thunderstorm Warning | EWX | Williamson | 57 min |
| Feb 18, 7:22 PM CST | Severe Thunderstorm Warning | EWX | DeWitt, Gonzales | 68 min |
| Feb 18, 7:40 PM CST | Severe Thunderstorm Warning | EWX | Atascosa | 65 min |
| Feb 18, 7:58 PM CST | Severe Thunderstorm Warning | EWX | Frio | 62 min |
| Feb 18, 8:14 PM CST | Flash Flood Warning | EWX | Atascosa | 3 hr |
| Feb 18, 8:48 PM CST | Severe Thunderstorm Warning | EWX | Atascosa | 57 min |
| Feb 18, 8:57 PM CST | Severe Thunderstorm Warning | EWX | Karnes | 63 min |
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.