Alert archive / Texas / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 66, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 25, 1999, 2:45 PM CDT for Medina County, Texas. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 25, 1999, 2:45 PM CDT (19:45 UTC)
- Expired
- Apr 25, 1999, 3:45 PM CDT
- In force
- 60 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Medina County, TX
The radar
The Austin/San Antonio radar (KEWX), 112 km from the middle of the area, began a volume at 19:48 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.
The nearest sounding before it
Del Rio, TX (KDRT), launched 12:00Z, 7.8 hours before the alert went out and 168 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
- 1820 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 528 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 118 m²/s²
- 0-3 km storm-relative helicity
- 282 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 14.5
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 9:00 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 40 min |
| Apr 25, 2:21 AM CDT | Severe Thunderstorm Warning | EWX | Maverick | 64 min |
| Apr 25, 2:54 AM CDT | Severe Thunderstorm Warning | EWX | Kinney | 61 min |
| Apr 25, 3:11 AM CDT | Severe Thunderstorm Warning | EWX | Uvalde, Zavala | 79 min |
| Apr 25, 5:03 AM CDT | Severe Thunderstorm Warning | EWX | Bexar | 62 min |
| Apr 25, 7:56 AM CDT | Severe Thunderstorm Warning | EWX | Edwards | 64 min |
| Apr 25, 9:18 AM CDT | Severe Thunderstorm Warning | EWX | Edwards | 62 min |
| Apr 25, 9:46 AM CDT | Flash Flood Warning | EWX | Edwards, Real | 59 min |
| Apr 25, 10:40 AM CDT | Flash Flood Warning | EWX | Edwards, Real | 2 hr |
| Apr 25, 11:11 AM CDT | Severe Thunderstorm Warning | EWX | Bandera, Uvalde | 49 min |
| Apr 25, 11:40 AM CDT | Flash Flood Warning | EWX | Kerr | 3 hr |
| Apr 25, 12:41 PM CDT | Flash Flood Warning | EWX | Real | 2 hr |
| Apr 25, 2:03 PM CDT | Severe Thunderstorm Warning | EWX | Bandera | 47 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.