Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 27, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Mar 12, 2001, 12:55 AM CST for Bexar County, Kendall County, Texas. It was in force for 65 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
- Mar 12, 2001, 12:55 AM CST (06:55 UTC)
- Expired
- Mar 12, 2001, 2:00 AM CST
- In force
- 65 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
Counties Bexar County, TX, Kendall County, TX
The radar
The Austin/San Antonio radar (KEWX), 57 km from the middle of the area, began a volume at 06:56 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Mar 11, 11:00 PM CST | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Del Rio, TX (KDRT), launched 00:00Z, 6.9 hours before the alert went out and 218 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
- 1542 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 1115 m above ground
- 0-6 km bulk shear
- 82 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 146 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 2.6
The text
As transmitted, in the capitals the NWS used until 2016.
148 WUUS54 KEWX 120700 SVRSAT TXC029-259-120800- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1255 AM CST MON MAR 12 2001 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS... SOUTHERN KENDALL COUNTY NORTHERN BEXAR COUNTY * UNTIL 2 AM CST * AT 1255 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR MEDINA LAKE...OR ABOUT 12 MILES WEST OF HELOTES...OR ABOUT 15 MILES SOUTHWEST OF BOERNE...MOVING TOWARD THE EAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE... NEAR HELOTES AND JUST SOUTH OF BOERNE BY 130 AM CST IN THE LEON SPRINGS-FAIR OAKS RANCH AREA AROUND 145 AM CST NEAR LOOP 1604 NORTH BETWEEN 130 AM AND 2 AM CST
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.
NWS Austin/San Antonio, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 11, 9:45 PM CST, 3 hours 10 minutes earlier.
Area forecast discussion, Mar 11, 9:45 PM CST, 3 hours 10 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 945 PM CST SUN MAR 11 2001 UPDATED ZONE FORECASTS TO INCLUDE THUNDER IN THE EDWARDS PLATEAU AND HILL COUNTRY FOR THE REST OF TONIGHT. SPC SUGGESTS A WATCH MAY BE IN ORDER SHORTLY IF CONVECTION CONTINUES TO DEVELOP AND SLIP SOUTHEASTWARD INTO NORTHWEST COUNTIES. ALSO MENTIONED SHOWERS OR THUNDERSTORMS FOR THE AUSTIN AND SAN ANTONIO AREAS AS WELL. .EWX...NONE.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 11, 10:21 PM CST | Severe Thunderstorm Warning | EWX | Val Verde | 54 min |
| Mar 11, 10:29 PM CST | Severe Thunderstorm Warning | EWX | Real | 61 min |
| Mar 11, 11:14 PM CST | Severe Thunderstorm Warning | EWX | Bandera, Real, Uvalde | 61 min |
| Mar 11, 11:42 PM CST | Tornado Warning | EWX | Val Verde | 33 min |
| Mar 12, 12:11 AM CST | Severe Thunderstorm Warning | EWX | Bandera, Medina | 64 min |
| Mar 12, 12:18 AM CST | Severe Thunderstorm Warning | EWX | Kinney | 57 min |
| Mar 12, 1:09 AM CST | Severe Thunderstorm Warning | EWX | Bandera, Real, Uvalde | 66 min |
| Mar 12, 1:16 AM CST | Severe Thunderstorm Warning | EWX | Travis | 59 min |
| Mar 12, 1:44 AM CST | Severe Thunderstorm Warning | EWX | Comal | 61 min |
| Mar 12, 1:58 AM CST | Severe Thunderstorm Warning | EWX | Bastrop, Lee, Williamson | 62 min |
| Mar 12, 2:04 AM CST | Severe Thunderstorm Warning | EWX | Bandera, Medina | 56 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2001Every severe thunderstorm warning in 2001
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.