Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 20, NWS Austin/San Antonio, TX

March 8, 2001Kendall County, Kerr County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Mar 8, 2001, 4:21 PM CST for Kendall County, Kerr County, Texas. It was in force for 54 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
Mar 8, 2001, 4:21 PM CST (22:21 UTC)
Expired
Mar 8, 2001, 5:15 PM CST
In force
54 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Kendall County, TX, Kerr County, TX

The radar

The Austin/San Antonio radar (KEWX), 88 km from the middle of the area, began a volume at 22:22 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.

IssuedProductOfficeLasted
Mar 8, 3:00 PM CSTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 10.4 hours before the alert went out and 207 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 12:00Z on 2001-03-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 43 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 12:00Z on 2001-03-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 214 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
43 J/kg
Mixed-layer CIN
-123 J/kg
Mixed-layer LCL
674 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
214 m²/s²
0-3 km storm-relative helicity
199 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

692 
WUUS54 KEWX 082223
SVRSAT
TXC259-265-082315-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
421 PM CST THU MAR 8 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN 
  TEXAS...
  NORTHEAST KENDALL COUNTY
  KERR COUNTY

* UNTIL 515 PM CST

* AT 423 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 12 MILES NORTH OF COMFORT...OR ABOUT 10 MILES
  SOUTHWEST OF FREDERICKSBURG...MOVING SOUTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  NEAR COMFORT BY 440 PM CST...
  AND NEAR SISTERDALE BY 450 PM CST...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE
FOR DAMAGING WINDS IN EXCESS OF 55 MPH...LARGE HAIL...AND DEADLY
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY
INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.


LAT...LON 3014 9908 2996 9894 2992 9854 3012 9860

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 8, 3:41 PM CST, 40 minutes earlier.

Area forecast discussion, Mar 8, 3:41 PM CST, 40 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
341 PM CST THU MAR 8 2001

UPPER LOW MOVING ACROSS CENTRAL TEXAS AT LATE AFTERNOON.  MODELS
FAIRLY CONSISTENT IN CONTINUED EASTWARD MOVEMENT OUT OF TEXAS BY
MORNING.  HOWEVER...FOR THIS EVENING...DRYLINE PROGRESSING EAST AND
COLD FRONT PROGRESSING SOUTH THROUGH CWA BY OVERNIGHT.  SEVERE STORMS
STILL POSSIBLE EASTERN CWA AHEAD OF DRYLINE AND NEAR UPPER LOW AS
THERMODYNAMIC/DYNAMIC PROFILES FAVORABLE.  LITTLE OR POPS WEST AND
CENTRAL AS SOMEWHAT DRIER AND SUBSIDENT AIRMASS IN WAKE OF LOW.
RATHER MOIST AIRMASS PERSIST AFTER SYSTEM...SO SKIES WILL REMAIN
MOSTLY CLOUDY.  ETA TEMPERATURES SEEM OKAY AND WILL FOLLOW.  NEXT
SYSTEM SLATED FOR SUNDAY AND MONDAY...SO WILL MAINTAIN CHANCE POPS
WITH SLIGHT BEGINNING SATURDAY NIGHT.  04.

PRELIMS...
AUS 48/64 48/65 6000
SAT 48/64 49/68 3000
DRT 45/68 50/72 0000

.EWX...NONE.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 8, 3:45 PM CSTSevere Thunderstorm WarningEWXGillespie45 min
Mar 8, 4:02 PM CSTSevere Thunderstorm WarningEWXBexar, Guadalupe43 min
Mar 8, 4:39 PM CSTTornado WarningEWXKendall66 min
Mar 8, 4:50 PM CSTSevere Thunderstorm WarningEWXWilson40 min
Mar 8, 5:33 PM CSTTornado WarningEWXComal42 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.