Alert archive / Texas / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 113, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 17, 1999, 11:06 PM CDT for Caldwell County, Gonzales County, Texas. It was in force for 54 min. 2 reports came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- May 17, 1999, 11:06 PM CDT (04:06 UTC)
- Expired
- May 18, 1999, 12:00 AM CDT
- In force
- 54 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Caldwell County, TX, Gonzales County, TX
The radar
The Austin/San Antonio radar (KEWX), 47 km from the middle of the area, began a volume at 04:07 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 |
|---|---|---|---|
| May 17, 11:30 PM CDT | Thunderstorm Wind | Luling, TX | |
| May 17, 11:40 PM CDT | Thunderstorm Wind | Gonzales, 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 17, 9:15 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 00:00Z, 4.1 hours before the alert went out and 225 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
- 3161 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 707 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 149 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 4.3
The text
As transmitted, in the capitals the NWS used until 2016.
999 WUUS1 KSAT 180407 RRA SVRSAT TXC055-177-180500- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1106 PM CDT MON MAY 17 1999 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... GONZALES COUNTY CALDWELL COUNTY * UNTIL MIDNIGHT CDT * AT 1106 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES NORTH OF LULING...OR ABOUT 5 MILES SOUTHEAST OF LOCKHART...MOVING SOUTHEAST AT 25 MPH. * THIS WARNING INCLUDES LOCATIONS IN AND AROUND... GONZALES LULING PALMETO WAELDER WIND GUSTS TO 60 MPH CAN BE EXPECTED WITH THESE STORMS. HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS LOW WATER CROSSINGS... DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS AS THEY MAY BE WASHED OUT. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE. SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS. LAT...LON 2994 9759 2981 9773 2941 9761 2962 9720
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Local storm report, May 17, 9:56 PM CDT, 1 hour 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
951 PM CST MON MAY 17 1999
TIME(CST) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0930 PM COMSTOCK TX .5 INCH HAIL
05/17/99 VAL VERDE HWY 163 13 MI. N. OF
COMSTOCK REPORTED BY
COUNTY SD
0930 PM BURNET TX .5 INCH HAIL
05/17/99 BURNET MARBLE SIZE HAIL REPORTED
BY HAMS IN BURNET COUNTYLocal storm report, May 17, 10:51 PM CDT, 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
951 PM CST MON MAY 17 1999
TIME(CST) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0930 PM COMSTOCK TX .5 INCH HAIL
05/17/99 VAL VERDE HWY 163 13 MI. N. OF
COMSTOCK REPORTED BY
COUNTY SD
0930 PM BURNET TX .5 INCH HAIL
05/17/99 BURNET MARBLE SIZE HAIL REPORTED
BY HAMS IN BURNET COUNTYThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 17, 7:17 PM CDT | Severe Thunderstorm Warning | EWX | Burnet | 58 min |
| May 17, 7:24 PM CDT | Tornado Warning | EWX | Val Verde | 36 min |
| May 17, 8:01 PM CDT | Severe Thunderstorm Warning | EWX | Williamson | 59 min |
| May 17, 8:13 PM CDT | Severe Thunderstorm Warning | EWX | Burnet | 32 min |
| May 17, 8:29 PM CDT | Severe Thunderstorm Warning | EWX | Blanco, Gillespie | 61 min |
| May 17, 8:42 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 63 min |
| May 17, 8:59 PM CDT | Tornado Warning | EWX | Val Verde | 31 min |
| May 17, 9:29 PM CDT | Tornado Warning | EWX | Kinney, Val Verde | 31 min |
| May 17, 9:58 PM CDT | Tornado Warning | EWX | Val Verde | 17 min |
| May 17, 10:41 PM CDT | Flash Flood Warning | EWX | Travis | 79 min |
| May 17, 10:41 PM CDT | Severe Thunderstorm Warning | EWX | Travis | 79 min |
| May 17, 10:49 PM CDT | Flash Flood Warning | EWX | Gillespie | 101 min |
| May 17, 11:26 PM CDT | Severe Thunderstorm Warning | EWX | Guadalupe | 64 min |
| May 17, 11:34 PM CDT | Severe Thunderstorm Warning | EWX | DeWitt, Gonzales, Lavaca | 86 min |
| May 17, 11:34 PM CDT | Severe Thunderstorm Warning | EWX | Karnes, Wilson | 86 min |
| May 17, 11:39 PM CDT | Severe Thunderstorm Warning | EWX | Bexar | 66 min |
| May 17, 11:51 PM CDT | Flash Flood Warning | EWX | Bandera | 54 min |
| May 18, 12:30 AM CDT | Severe Thunderstorm Warning | EWX | Uvalde | 60 min |
| May 18, 12:56 AM CDT | Severe Thunderstorm Warning | EWX | Frio | 64 min |
| May 18, 2:16 AM CDT | Severe Thunderstorm Warning | EWX | Maverick, Zavala | 64 min |
Nearby
Severe Thunderstorm Warnings in Texas, 1999Every severe thunderstorm warning in 1999
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.