Alert archive / Texas / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 21, NWS Austin/San Antonio, TX

April 23, 2010Burnet County, Llano County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 23, 2010, 11:03 PM CDT for Burnet County, Llano County, Texas. It was in force for 42 min. 1 report 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 23, 2010, 11:03 PM CDT (04:03 UTC)
Expired
Apr 23, 2010, 11:45 PM CDT
In force
42 min
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon

Counties Burnet County, TX, Llano County, TX

The radar

The Ft Hood radar (KGRK), 80 km from the middle of the area, began a volume at 04:05 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 23, 11:11 PM CDTHAIL 117 N Burnet, TX

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 23, 9:34 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 4.1 hours before the alert went out and 229 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, Fort Worth, TX at 00:00Z on 2010-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Fort Worth, TX at 00:00Z on 2010-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2449 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
131 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

797 
WUUS54 KEWX 240403
SVREWX
TXC053-299-240445-
/O.NEW.KEWX.SV.W.0021.100424T0403Z-100424T0445Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1103 PM CDT FRI APR 23 2010

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BURNET COUNTY...
  NORTHEASTERN LLANO COUNTY...

* UNTIL 1145 PM CDT.

* AT 1054 PM CDT...NWS METEOROLOGISTS HAVE DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO GOLF
  BALL SIZE.  THIS STORM WAS LOCATED 8 MILES NORTHEAST OF TOW...OR 12
  MILES NORTH OF BUCHANAN DAM...AND MOVING NORTHEAST AT 40 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE OATMEAL...LAKE VICTOR...
  BERTRAM...SHADY GROVE...SUNNYLANE...JOPPA AND WATSON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HAIL UP TO 1.25 INCHES IN DIAMETER HAS BEEN REPORTED 10 MILES 
NORTHWEST OF LLANO WITH THIS STORM. IF YOU ARE IN THE PATH OF THE 
STORM...TAKE IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 AM CDT SATURDAY MORNING
FOR SOUTH CENTRAL TEXAS.

&&

LAT...LON 3103 9789 3102 9789 3085 9794 3064 9810
      3060 9846 3081 9850 3093 9846 3094 9842
      3095 9845 3103 9843 3105 9818 3105 9791
TIME...MOT...LOC 0402Z 247DEG 34KT 3098 9828

$$
2 follow-up statements
028 
WWUS54 KEWX 240417
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1117 PM CDT FRI APR 23 2010

TXC053-299-240445-
/O.CON.KEWX.SV.W.0021.000000T0000Z-100424T0445Z/
BURNET TX-LLANO TX-
1117 PM CDT FRI APR 23 2010

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT
FOR NORTHEASTERN LLANO AND BURNET COUNTIES...

AT 1112 PM CDT...NWS METEOROLOGISTS CONTINUED TO DETECT A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS
LOCATED NEAR LAKE VICTOR...OR 10 MILES SOUTH OF LAMPASAS...MOVING
EAST AT 30 MPH.

SOME LOCATIONS IN THE WARNING AREA INCLUDE OATMEAL...SUNNYLANE...
SHADY GROVE...BERTRAM...JOPPA AND WATSON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 AM CDT SATURDAY MORNING
FOR SOUTH CENTRAL TEXAS.

&&

LAT...LON 3103 9789 3102 9789 3085 9794 3064 9810
      3065 9841 3089 9847 3093 9845 3094 9842
      3095 9844 3103 9841 3105 9818 3105 9791
TIME...MOT...LOC 0418Z 260DEG 28KT 3093 9817

$$
475 
WWUS54 KEWX 240443
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1143 PM CDT FRI APR 23 2010

TXC053-299-240451-
/O.EXP.KEWX.SV.W.0021.000000T0000Z-100424T0445Z/
BURNET TX-LLANO TX-
1143 PM CDT FRI APR 23 2010

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN LLANO AND BURNET
COUNTIES WILL EXPIRE AT 1145 PM CDT...

THE SEVERE STORMS HAVE DECREASED IN INTENSITY AND MOVED NORTH OUT OF 
THE AREA AND THE WARNING WILL BE ALLOWED TO EXPIRE.   

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 AM CDT SATURDAY MORNING
FOR SOUTH CENTRAL TEXAS.

LAT...LON 3103 9789 3102 9789 3085 9794 3064 9810
      3065 9841 3089 9847 3093 9845 3094 9842
      3095 9844 3103 9841 3105 9818 3105 9791
TIME...MOT...LOC 0441Z 260DEG 28KT 3096 9796

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 23, 9:47 PM CDTSevere Thunderstorm WarningEWXEdwards, Real58 min
Apr 23, 9:49 PM CDTSevere Thunderstorm WarningEWXUvalde56 min
Apr 23, 10:06 PM CDTSevere Thunderstorm WarningEWXEdwards, Kinney, Real, Uvalde, Val Verde39 min
Apr 23, 10:22 PM CDTSevere Thunderstorm WarningEWXMaverick, Uvalde, Zavala53 min
Apr 23, 10:29 PM CDTSevere Thunderstorm WarningEWXBandera, Medina, Uvalde46 min
Apr 23, 10:34 PM CDTSevere Thunderstorm WarningEWXBurnet, Llano26 min
Apr 23, 10:39 PM CDTSevere Thunderstorm WarningEWXBandera, Kendall, Kerr51 min
Apr 23, 10:42 PM CDTSevere Thunderstorm WarningEWXEdwards, Kinney, Real, Uvalde48 min
Apr 23, 10:59 PM CDTSevere Thunderstorm WarningEWXBandera, Edwards, Kerr, Real, Uvalde46 min
Apr 23, 11:08 PM CDTAreal Flood AdvisoryEWXMedina, Uvalde112 min
Apr 23, 11:09 PM CDTSevere Thunderstorm WarningEWXDimmit, Kinney, Maverick, Uvalde, Val Verde, Zavala51 min
Apr 23, 11:11 PM CDTAreal Flood AdvisoryEWXFrio, Uvalde, Zavala109 min
Apr 23, 11:28 PM CDTSevere Thunderstorm WarningEWXBandera, Real, Uvalde34 min
Apr 23, 11:33 PM CDTSevere Thunderstorm WarningEWXMedina27 min
Apr 23, 11:42 PM CDTAreal Flood AdvisoryEWXBandera, Blanco, Gillespie, Kendall, Kerr, Medina and 2 more108 min
Apr 23, 11:51 PM CDTAreal Flood AdvisoryEWXMaverick2 hr
Apr 23, 11:56 PM CDTSevere Thunderstorm WarningEWXDimmit, Kinney, Maverick, Uvalde, Zavala49 min
Apr 24, 12:30 AM CDTFlash Flood WarningEWXZavala110 min
Apr 24, 12:35 AM CDTSevere Thunderstorm WarningEWXDimmit, Frio, Medina, Uvalde, Zavala40 min
Apr 24, 1:19 AM CDTSevere Thunderstorm WarningEWXAtascosa, Bexar41 min
Apr 24, 1:41 AM CDTSevere Thunderstorm WarningEWXBexar21 min
Apr 24, 1:49 AM CDTSevere Thunderstorm WarningEWXBexar, Comal, Guadalupe30 min
Apr 24, 1:51 AM CDTSevere Thunderstorm WarningEWXBexar, Comal, Guadalupe39 min

Nearby

Severe Thunderstorm Warnings in Texas, 2010Every severe thunderstorm warning in 2010

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.