Alert archive / Texas / Tornado Warnings in 2011

Tornado Warning 2, NWS San Angelo, TX

April 10, 2011McCulloch County, Mason County, Texas

NWS San Angelo, TX issued this tornado warning at Apr 10, 2011, 11:25 PM CDT for McCulloch County, Mason County, Texas. It was in force for 24 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 10, 2011, 11:25 PM CDT (04:25 UTC)
Expired: Apr 10, 2011, 11:49 PM CDT
In force: 24 min
Issued by: NWS San Angelo, TX
Area: Storm-based polygon

Counties Mason County, TX, McCulloch County, TX

The radar

The San Angelo radar (KSJT), 123 km from the middle of the area, began a volume at 04:27 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

Time	Report	Where	Remark
Apr 10, 11:45 PM CDT	TSTM WND DMG	4 Sse Fredonia, TX	ROOF BLOWN OFF OF BARN.

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.

Issued	Product	Office	Lasted
Apr 10, 7:02 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 4.4 hours before the alert went out and 228 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: 800 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 3016 m above ground
0-6 km bulk shear: 84 kt
0-1 km storm-relative helicity: 117 m²/s²
0-3 km storm-relative helicity: 336 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.1

Open this sounding in Storm Lab

The text

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

390 
WFUS54 KSJT 110425
TORSJT
TXC307-319-110500-
/O.NEW.KSJT.TO.W.0002.110411T0425Z-110411T0500Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
1125 PM CDT SUN APR 10 2011

THE NATIONAL WEATHER SERVICE IN SAN ANGELO HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN MCCULLOCH COUNTY IN WEST CENTRAL TEXAS...
  NORTHERN MASON COUNTY IN WEST CENTRAL TEXAS...

* UNTIL MIDNIGHT CDT

* AT 1123 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 9 MILES WEST OF
  KATEMCY...OR 15 MILES NORTHWEST OF MASON...MOVING NORTHEAST AT 50
  MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  KATEMCY BY 1130 PM CDT...
  VOCA AND FREDONIA BY 1140 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
QUARTER SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM CDT MONDAY
MORNING FOR WEST CENTRAL TEXAS.

&&

LAT...LON 3089 9948 3094 9948 3094 9952 3096 9952
      3115 9914 3095 9908 3093 9909 3092 9908
      3084 9905 3080 9942
TIME...MOT...LOC 0425Z 241DEG 45KT 3092 9937

$$

2 follow-up statements

771 
WWUS54 KSJT 110434
SVSSJT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
1134 PM CDT SUN APR 10 2011

TXC307-319-110500-
/O.CON.KSJT.TO.W.0002.000000T0000Z-110411T0500Z/
MCCULLOCH TX-MASON TX-
1134 PM CDT SUN APR 10 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR NORTH
CENTRAL MASON AND SOUTHEASTERN MCCULLOCH COUNTIES...

AT 1132 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR THE INTERSECTION 
OF US-377 AND RANCH ROAD 1222...OR 12 MILES NORTH OF MASON...MOVING 
EAST AT 50 MPH.

THE TORNADO WILL BE NEAR...
  VOCA BY 1140 PM CDT...
  FREDONIA BY 1145 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM CDT MONDAY
MORNING FOR WEST CENTRAL TEXAS.

&&

LAT...LON 3098 9939 3106 9911 3098 9909 3093 9909
      3092 9907 3087 9906 3081 9933
TIME...MOT...LOC 0434Z 253DEG 42KT 3092 9926

$$

161 
WWUS54 KSJT 110449
SVSSJT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
1149 PM CDT SUN APR 10 2011

TXC307-319-110459-
/O.CAN.KSJT.TO.W.0002.000000T0000Z-110411T0500Z/
MCCULLOCH TX-MASON TX-
1149 PM CDT SUN APR 10 2011

...THE TORNADO WARNING FOR NORTH CENTRAL MASON AND SOUTHEASTERN
MCCULLOCH COUNTIES IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM CDT MONDAY MORNING FOR
WEST CENTRAL TEXAS. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN
EFFECT UNTIL 200 AM CDT MONDAY MORNING FOR WEST CENTRAL TEXAS.

LAT...LON 3098 9939 3106 9911 3098 9909 3093 9909
      3092 9907 3087 9906 3081 9933
TIME...MOT...LOC 0449Z 253DEG 42KT 3097 9906

$$

The office that day

Everything else NWS San Angelo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 10, 7:53 PM CDT	Severe Thunderstorm Warning	SJT	Brown, Callahan, Coleman	52 min
Apr 10, 8:32 PM CDT	Severe Thunderstorm Warning	SJT	Coleman, Concho, Runnels	28 min
Apr 10, 9:14 PM CDT	Severe Thunderstorm Warning	SJT	Brown, Callahan, Coleman	36 min
Apr 10, 10:15 PM CDT	Severe Thunderstorm Warning	SJT	Concho, Menard, Schleicher, Tom Green	45 min
Apr 10, 10:53 PM CDT	Severe Thunderstorm Warning	SJT	Brown, Coleman, Concho, Kimble, McCulloch, Mason and 2 more	52 min
Apr 10, 10:57 PM CDT	Tornado Warning	SJT	McCulloch	33 min
Apr 10, 11:29 PM CDT	Severe Thunderstorm Warning	SJT	Brown, McCulloch, Mason, San Saba	46 min
Apr 10, 11:45 PM CDT	Severe Thunderstorm Warning	SJT	Kimble, Mason, Menard	45 min
Apr 11, 12:17 AM CDT	Severe Thunderstorm Warning	SJT	Kimble	43 min
Apr 11, 12:19 AM CDT	Severe Thunderstorm Warning	SJT	Mason, San Saba	41 min
Apr 11, 12:25 AM CDT	Tornado Warning	SJT	Mason	23 min

Nearby

Tornado Warnings in Texas, 2011 Every tornado warning in 2011 Tornadoes in 2011

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.