Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 30, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Mar 12, 2001, 1:44 AM CST for Comal County, Texas. It was in force for 61 min. 1 report 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, 2001, 1:44 AM CST (07:44 UTC)
- Expired
- Mar 12, 2001, 2:45 AM CST
- In force
- 61 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Comal County, TX
The radar
The Austin/San Antonio radar (KEWX), 27 km from the middle of the area, began a volume at 08:04 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, 2:30 AM CST | Hail 1 | Bulverde, 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 11, 11:00 PM CST | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 00:00Z, 7.7 hours before the alert went out and 248 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
- 1101 J/kg
- Mixed-layer CIN
- -114 J/kg
- Mixed-layer LCL
- 658 m above ground
- 0-6 km bulk shear
- 72 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KEWX 120747 SVRSAT TXC091-120845- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 144 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... COMAL COUNTY * UNTIL 245 AM CST * AT 144 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM BETWEEN BULVERDE AND LOOP 1604 NORTH...OR 20 MILES SOUTHWEST OF CANYON LAKE. MOVEMENT WAS TOWARD THE EAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE... IN THE CANYON LAKE-SATTLER-STARTZVILLE-NEW BRAUNFELS AREA BETWEEN 215 AM AND 230 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 59 minutes earlier.
Area forecast discussion, Mar 11, 9:45 PM CST, 3 hours 59 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, 12:55 AM CST | Severe Thunderstorm Warning | EWX | Bexar, Kendall | 65 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, 1:58 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.