Alert archive / Texas / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 112, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Mar 7, 1998, 4:04 PM CST for Llano County, Texas. It was in force for 56 min. 2 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
- Mar 7, 1998, 4:04 PM CST (22:04 UTC)
- Expired
- Mar 7, 1998, 5:00 PM CST
- In force
- 56 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Llano County, TX
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 7, 4:15 PM CST | Hail 1.5 | Castell, TX | |
| Mar 7, 4:40 PM CST | Hail 1.75 | Llano, 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
Del Rio, TX (KDRT), launched 12:00Z, 10.1 hours before the alert went out and 255 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
- 28 J/kg
- Mixed-layer CIN
- -414 J/kg
- Mixed-layer LCL
- 527 m above ground
- 0-6 km bulk shear
- 68 kt
- 0-1 km storm-relative helicity
- 254 m²/s²
- 0-3 km storm-relative helicity
- 251 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSAT 072204 RRA SVRSAT TXC299-072300- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 404 PM CST SAT MAR 7 1998 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 500 PM CST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL TEXAS ...LLANO COUNTY AT 4 PM A SEVERE THUNDERSTORM WAS INDICATED ABOUT 10 MILES WEST OF LLANO. THE STORM WAS MOVING EAST AT 30 MPH. LLANO IS IN THE PATH OF THIS STORM. 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.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 7, 4:13 PM CST | Severe Thunderstorm Warning | EWX | Gillespie | 62 min |
| Mar 7, 4:39 PM CST | Tornado Warning | EWX | Llano | 51 min |
| Mar 7, 4:51 PM CST | Severe Thunderstorm Warning | EWX | Burnet | 69 min |
| Mar 7, 5:01 PM CST | Severe Thunderstorm Warning | EWX | Blanco | 44 min |
| Mar 7, 5:08 PM CST | Tornado Warning | EWX | Blanco | 52 min |
| Mar 7, 5:35 PM CST | Severe Thunderstorm Warning | EWX | Hays, Travis | 40 min |
Nearby
Severe Thunderstorm Warnings in Texas, 1998Every severe thunderstorm warning 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.