Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 35, NWS Austin/San Antonio, TX

April 15, 2001Bandera County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 15, 2001, 6:50 PM CDT for Bandera County, Texas. It was in force for 40 min. No storm report in the archive falls 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.

The facts

Issued: Apr 15, 2001, 6:50 PM CDT (23:50 UTC)
Expired: Apr 15, 2001, 7:30 PM CDT
In force: 40 min
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Bandera County, TX

The radar

The Laughlin AFB radar (KDFX), 116 km from the middle of the area, began a volume at 23:49 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, 11.8 hours before the alert went out and 162 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 952 J/kg
Mixed-layer CIN: -257 J/kg
Mixed-layer LCL: 1229 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KEWX 152351
SVRSAT
TXC019-160030-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
650 PM CDT SUN APR 15 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  BANDERA COUNTY

* UNTIL 730 PM CDT

* AT 650 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR TWO   
  SEVERE THUNDERSTORMS.  ONE STORM WAS IN WESTERN BANDERA COUNTY AND 
  ONE IN EASTERN BANDERA COUNTY DRIFTING VERY SLOWLY SOUTHEASTWARD.

LARGE HAIL IS POSSIBLE WITH THIS SEVERE THUNDERSTORM. IF YOU ARE IN 
THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A 
SUBSTANTIAL SHELTER.  ALSO DAMAGING WINDS ARE POSSBILE WITH THESE 
STORMS.

LAT...LON 2987 9949 2968 9955 2963 9890 2970 9876
          2988 9919

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 Apr 15, 2:25 PM CDT, 4 hours 25 minutes earlier.

Area forecast discussion, Apr 15, 2:25 PM CDT, 4 hours 25 minutes before

SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
225 PM CDT SUN APR 15 2001

PREFER THE SLOWER AVN SOLUTION ONCE AGAIN FOR THIS FCST.  WEAK COLD
FRONT IS ENTERING THE NORTHERN COUNTIES OF THE CWFA ATTM WITH
CONVECTION FIRING OVER EAST TEXAS AND CENTRAL LOUISIANA.  FRONT WILL
LIKELY STALL OUT OVER THE SOUTHERN COUNTIES TONIGHT WITH NO PCPN
EXPECTED FOR THE CWFA.  HOWEVER SLIGHTLY LOWER DEWPOINTS WILL BE
ASSOCIATED WITH THIS FRONT...ESPECIALLY ACROSS THE HILL COUNTRY AND
EDWARDS PLATEAU.  FRONTAL BOUNDARY WILL WASH OUT MONDAY AS SE SFC
FLOW RETURNS BY THE AFTERNOON.  STRONG COLD FRONT CURRENTLY OVER THE
NORTHERN PLAINS WILL MOVE INTO THE HILL COUNTRY AND SOUTH CENTRAL
TEXAS LATE MONDAY NIGHT/TUESDAY MORNING.  SCATTERED TO NUMEROUS
SHOWERS AND THUNDERSTORMS ARE EXPECTED ALONG AND BEHIND THE FRONT.
SPC DAY2 OUTLOOK HAS THE NORTHERN HALF OF THE CWFA IN THE SLIGHT
RISK AREA.  WILL NOT MENTION SVR IN ZONE FCST...MAINLY NOCTURNAL
PASSAGE OF FRONT ACROSS THE CWFA MAY PRECLUDE SVR WX DEVELOPMENT.
BELOW NORMAL TEMPS WILL RESULT TUESDAY THRU THURSDAY...ENJOY.  WARM
AND HUMID WX WILL RETURN FOR THE WEEKEND.  TEMPS AND POPS WILL BE
CLOSE TO MAV NUMBERS.

PRELIMS...
AUS 63/81 58/65 46 1145
SAT 66/84 62/69 50 1135
DRT 65/87 65/71 52 0045

.EWX...NONE.

13/05

In the hours before

Special weather statement, Apr 15, 5:52 PM CDT, 58 minutes before

TXZ184>187-189-202>207-221-160200-

HAZARADOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
552 PM CDT SUN APR 15 2001

...ISOLATED SEVERE THUNDERSTORMS POSSIBLE THIS EVENING ACROSS
PORTIONS OF SOUTH CENTRAL TEXAS...

ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE THIS EVENING ACROSS THE
TEXAS HILL COUNTRY AND ADJACENT AREAS OF SOUTH CENTRAL TEXAS.  A
LINE OF THUNDERSTORMS ARE EXPECTED TO DEVELOP BETWEEN 6 PM AND 7 PM
ACROSS THE CENTRAL AND EASTERN PORTIONS OF THE TEXAS HILL COUNTRY.
THESE THUNDERSTORMS WILL DRIFT SLOWLY SOUTHWARD TO THE AREA ALONG
HIGHWAY 90 BETWEEN UVALDE AND SAN ANTONIO BETWEEN 7 PM AND 9 PM.

DUE TO THE STRONG DAYTIME HEATING THE AIR IS UNSTABLE ENOUGH SO THAT
SOME OF THE THUNDERSTORMS COULD PRODUCE STRONG DAMAGING WINDS AND
SOME LARGE HAIL.

THIS OUTLOOK APPLIES TO FOLLOWING SPECIFIC COUNTIES...
COMAL...MEDINA...KENDALL...WILSON...REAL...KERR...BEXAR...BANDERA...
EDWARDS...KINNEY...GUADALUPE AND UVALDE.

SPOTTER NETWORKS MAY NEED TO BE ACTIVATED AS THE THUNDERSTORMS
MOVE ACROSS THE THREATENED AREA.

&&

FOR INFORMATION ON WEATHER THREATS IN SURROUNDING AREAS...REFER
TO OUTLOOKS FROM OFFICES IN MIDLAND...SAN ANGELO...FORT WORTH...
HOUSTON/GALVESTON AND CORPUS CHRISTI.

Nearby

Severe Thunderstorm Warnings in Texas, 2001 Every 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.