Alert archive / Texas / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 23, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Mar 12, 1999, 4:45 PM CST for Burnet County, Texas. It was in force for 60 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 12, 1999, 4:45 PM CST (22:45 UTC)
- Expired
- Mar 12, 1999, 5:45 PM CST
- In force
- 60 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Burnet County, TX
The radar
The Ft Hood radar (KGRK), 77 km from the middle of the area, began a volume at 22:46 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 |
|---|---|---|---|
| Mar 12, 5:15 PM CST | Hail 1.75 | Marble Falls, TX | |
| Mar 12, 5:40 PM CST | Tornado F0 | Marble Falls, 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 |
|---|---|---|---|
| Mar 12, 10:45 AM CST | Tornado Watch | SPC | 6 hr |
| Mar 12, 3:45 PM CST | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 10.8 hours before the alert went out and 242 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
- 2 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 511 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 288 m²/s²
- 0-3 km storm-relative helicity
- 416 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.9
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, Mar 12, 2:45 PM CST, 2 hours before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
245 PM CST FRI MAR 12 1999
TIME(CST) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0200 PM LOMA ALTA TX 1.75 INCH HAIL
03/12/99 VAL VERDE SHERIFF REPORT
LASTED 20 MINUTESLocal storm report, Mar 12, 2:45 PM CST, 2 hours before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
245 PM CST FRI MAR 12 1999
TIME(CST) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0200 PM LOMA ALTA TX 1.75 INCH HAIL
03/12/99 VAL VERDE SHERIFF REPORT
LASTED 20 MINUTESThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 12, 11:09 AM CST | Severe Thunderstorm Warning | EWX | Burnet, Williamson | 41 min |
| Mar 12, 12:34 PM CST | Severe Thunderstorm Warning | EWX | Val Verde | 61 min |
| Mar 12, 12:39 PM CST | Severe Thunderstorm Warning | EWX | Burnet | 46 min |
| Mar 12, 1:15 PM CST | Severe Thunderstorm Warning | EWX | Edwards | 60 min |
| Mar 12, 1:47 PM CST | Tornado Warning | EWX | Edwards, Val Verde | 63 min |
| Mar 12, 2:50 PM CST | Severe Thunderstorm Warning | EWX | Edwards, Kinney, Real, Val Verde | 60 min |
| Mar 12, 3:39 PM CST | Severe Thunderstorm Warning | EWX | Burnet | 61 min |
| Mar 12, 3:53 PM CST | Tornado Warning | EWX | Kinney | 42 min |
| Mar 12, 4:03 PM CST | Severe Thunderstorm Warning | EWX | Llano | 62 min |
| Mar 12, 4:17 PM CST | Severe Thunderstorm Warning | EWX | Uvalde | 58 min |
| Mar 12, 5:16 PM CST | Severe Thunderstorm Warning | EWX | Uvalde | 59 min |
| Mar 12, 5:21 PM CST | Tornado Warning | EWX | Burnet, Travis | 64 min |
| Mar 12, 5:35 PM CST | Tornado Warning | EWX | Medina, Uvalde | 60 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.