Alert archive / Texas / Tornado Warnings in 2006

Tornado Warning 18, NWS Austin/San Antonio, TX

April 21, 2006Kerr County, Texas

NWS Austin/San Antonio, TX issued this tornado warning at Apr 21, 2006, 1:08 AM CDT for Kerr County, Texas. It was in force for 37 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Apr 21, 2006, 1:08 AM CDT (06:08 UTC)
Expired
Apr 21, 2006, 1:45 AM CDT
In force
37 min
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

County Kerr County, TX

The radar

The Laughlin AFB radar (KDFX), 123 km from the middle of the area, began a volume at 06:08 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

TimeReportWhereRemark
Apr 21, 1:25 AM CDTHAIL 2.756 Sw Hunt, TX6 MI SW OF HUNT ON HWY 39. VEHICLE WINDOWS BROKEN.
Apr 21, 1:25 AM CDTHAIL 2.756 Sw Hunt, TXVEHICLE WINDOWS BROKEN.
Apr 21, 1:30 AM CDTHAIL 0.7511 Sw Kerrville, TX

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 6.1 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-pSkew-T log-p diagram, Del Rio, TX at 00:00Z on 2006-04-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2847 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 2006-04-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 square meters per square second.19395878Sfc1 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
2847 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
913 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
81 m²/s²
Significant tornado parameter
1.0
Supercell composite
4.0

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KEWX 210608
TOREWX
TXC265-210645-
/O.NEW.KEWX.TO.W.0018.060421T0608Z-060421T0645Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
108 AM CDT FRI APR 21 2006

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* TORNADO WARNING FOR THE FOLLOWING COUNTIES...
  KERR

* UNTIL 145 AM CDT

* AT 104 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES WEST OF
  HUNT...MOVING SOUTHEAST AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE INGRAM.

THE SAFEST PLACE TO BE DURING A TORNADO IS ON THE LOWEST FLOOR OF A
BUILDING IN AN INTERIOR HALLWAY...BATHROOM...OR CLOSET. COVER
YOURSELF WITH BLANKETS...PILLOWS OR EVEN A MATTRESS FOR BETTER
PROTECTION.

LAT...LON 3009 9947 3000 9948 2993 9935 2992 9918
      3005 9914 3012 9935

$$
2 follow-up statements
000 
WWUS54 KEWX 210624
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
123 AM CDT FRI APR 21 2006

TXC265-210645-
/O.CON.KEWX.TO.W.0018.000000T0000Z-060421T0645Z/
KERR TX-
123 AM CDT FRI APR 21 2006

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 145 AM CDT FOR KERR
COUNTY...

AT 120 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED 9 MILES SOUTH OF
HUNT...OR ABOUT 10 MILES NORTH OF MEDINA...MOVING SOUTHEAST AT 30
MPH.

THE TORNADO WILL THREATEN HIGHWAY 16 NEAR THE BANDERA COUNTY BORDER 
BY 130 AM.

THE SAFEST PLACE TO BE DURING A TORNADO IS ON THE LOWEST FLOOR OF A
BUILDING IN AN INTERIOR HALLWAY...BATHROOM...OR CLOSET. COVER
YOURSELF WITH BLANKETS...PILLOWS OR EVEN A MATTRESS FOR BETTER
PROTECTION.

LAT...LON 3009 9947 3000 9948 2993 9935 2992 9918
      3005 9914 3012 9935

$$
000 
WWUS54 KEWX 210646
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
146 AM CDT FRI APR 21 2006

TXC265-210656-
/O.EXP.KEWX.TO.W.0018.000000T0000Z-060421T0645Z/
KERR TX-
146 AM CDT FRI APR 21 2006

...THE TORNADO WARNING FOR KERR COUNTY EXPIRES AT 145 AM CDT...

THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAS SINCE MOVED 
INTO BANDERA COUNTY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 AM CDT FRIDAY
MORNING FOR SOUTH CENTRAL TEXAS.

LAT...LON 3009 9947 3000 9948 2993 9935 2992 9918
      3005 9914 3012 9935

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 20, 7:21 PM CDTSevere Thunderstorm WarningEWXWilliamson39 min
Apr 20, 7:54 PM CDTSevere Thunderstorm WarningEWXWilliamson36 min
Apr 20, 8:45 PM CDTSevere Thunderstorm WarningEWXTravis, Williamson60 min
Apr 20, 10:56 PM CDTFlash Flood WarningEWXMaverick3 hr
Apr 20, 11:40 PM CDTSevere Thunderstorm WarningEWXKinney, Maverick, Uvalde65 min
Apr 21, 12:59 AM CDTSevere Thunderstorm WarningEWXKerr61 min
Apr 21, 1:14 AM CDTSevere Thunderstorm WarningEWXGillespie, Kendall61 min
Apr 21, 1:34 AM CDTTornado WarningEWXBandera38 min
Apr 21, 2:24 AM CDTSevere Thunderstorm WarningEWXComal, Kendall66 min
Apr 21, 4:51 AM CDTSevere Thunderstorm WarningEWXLavaca47 min

Nearby

Tornado Warnings in Texas, 2006Every tornado warning in 2006Tornadoes in 2006

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.