Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 38, NWS Austin/San Antonio, TX

April 16, 2001Edwards County, Val Verde County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 16, 2001, 2:18 AM CDT for Edwards County, Val Verde County, Texas. It was in force for 57 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 16, 2001, 2:18 AM CDT (07:18 UTC)
Expired
Apr 16, 2001, 3:15 AM CDT
In force
57 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Edwards County, TX, Val Verde County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 7.3 hours before the alert went out and 35 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-pSkew-T log-p diagram, Del Rio, TX at 00:00Z on 2001-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1223 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 00:00Z on 2001-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -47 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
1223 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
2335 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
-47 m²/s²
0-3 km storm-relative helicity
-10 m²/s²
Significant tornado parameter
0.0
Supercell composite
-2.3

Open this sounding in Storm Lab

The text

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

132 
WUUS54 KEWX 160718
SVRSAT
TXC137-465-160815-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
218 AM CDT MON APR 16 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  EDWARDS COUNTY
  VAL VERDE COUNTY

* UNTIL 315 AM CDT

* AT 218 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 25 MILES SOUTHWEST OF CARTA VALLEY...OR ABOUT
  12 MILES SOUTHEAST OF COMSTOCK...MOVING NORTH AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
RURAL VAL VERDE COUNTY AT 230 AM CDT
RURAL EDWARDS COUNTY AT 320 AM CDT

VERY 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.


LAT...LON 2957 10113 2945 10098 2981 10049 3000 10071

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, 8:30 PM CDT, 5 hours 48 minutes earlier.

Area forecast discussion, Apr 15, 8:30 PM CDT, 5 hours 48 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
830 PM CDT SUN APR 15 2001

CURRENT SURFACE ANALYSIS HAS FRONTAL BOUNDARY AND WIND SHIFT LINE
JUST NORTH OF THE ESCARPMENT RUNNING FROM NEAR AUS TO NEAR SAT TO
NEAR DRT. THUNDERSTORM ACTIVITY CONTINUES TO REDEVELOP ALONG THE
ESCARPMENT AND WILL CONTINUE THIS TREND FOR A FEW MORE HOURS BEFORE
SLOWLY DECREASING IN INTENSITY AS THE COOLER AIR FILTERS SOUTH AND
DAYTIME HEATING ABATES.

LOOK FOR FRONTAL BOUNDARY TO SLOWLY SLIDE SOUTHWARD AND STALL OVER
THE SOUTHERN COUNTIES LATER TONIGHT. LOWER DEW-POINTS WILL MAKE FOR
A COOL NIGHT...BUT TEMPS ON MONDAY WILL STILL BE IN THE 80S.

WILL UPDATE ZONE FORECAST TO ADJUST SKY CONDITION...TEMPS...WINDS AND
POPS FOR TONIGHT.

PREVIOUS DISCUSSION...
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.

In the hours before

Local storm report, Apr 15, 10:23 PM CDT, 3 hours 55 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
1023 PM CDT SUN APR 15 2001

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0900 PM    9 N LEAKEY                TX   HAIL DAMAGED CAR
04/15/01   REAL

0945 PM    2 1/2 W UTOPIA            TX   1.00 INCH HAIL
04/15/01   UVALDE

0955 PM    UTOPIA         /           TX   1.75 INCH HAIL
04/15/01   UVALDE

DC

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 15, 8:45 PM CDTSevere Thunderstorm WarningEWXReal60 min
Apr 15, 9:42 PM CDTSevere Thunderstorm WarningEWXUvalde63 min
Apr 16, 3:28 AM CDTSevere Thunderstorm WarningEWXVal Verde62 min
Apr 16, 3:55 PM CDTSevere Thunderstorm WarningEWXLee65 min
Apr 16, 4:48 PM CDTTornado WarningEWXLee42 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.