Alert archive / Texas / Tornado Warnings in 2015

Tornado Warning 5, NWS Austin/San Antonio, TX

April 27, 2015Atascosa County, Frio County, Texas

NWS Austin/San Antonio, TX issued this tornado warning at Apr 27, 2015, 1:54 AM CDT for Atascosa County, Frio County, Texas. It was in force for 38 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 27, 2015, 1:54 AM CDT (06:54 UTC)
Expired: Apr 27, 2015, 2:32 AM CDT
In force: 38 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Atascosa County, TX, Frio County, TX

The radar

The Austin/San Antonio radar (KEWX), 128 km from the middle of the area, began a volume at 06:55 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 27, 2:12 AM CDT	TSTM WND GST 50	Jourdanton, TX	MEASURED FROM ANEMOMETER ON CAR

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 27, 1:27 AM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 6.9 hours before the alert went out and 193 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: 3577 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 627 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 113 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 3.5

Open this sounding in Storm Lab

The text

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

880 
WFUS54 KEWX 270654
TOREWX
TXC013-163-270800-
/O.NEW.KEWX.TO.W.0005.150427T0654Z-150427T0800Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
154 AM CDT MON APR 27 2015

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN ATASCOSA COUNTY IN SOUTH CENTRAL TEXAS...
  CENTRAL FRIO COUNTY IN SOUTH CENTRAL TEXAS...

* UNTIL 300 AM CDT
    
* AT 153 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A 
  TORNADO WAS LOCATED 5 MILES WEST OF PEARSALL...MOVING EAST AT 50 
  MPH.

  HAZARD...TORNADO. 

  SOURCE...RADAR INDICATED ROTATION. 

  IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT 
           SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. 
           DAMAGE TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR.  TREE 
           DAMAGE IS LIKELY. 

* THIS DANGEROUS STORM WILL BE NEAR...
  PEARSALL AND NORTH PEARSALL AROUND 200 AM CDT.
  GOLDFINCH AND SCHATTEL AROUND 215 AM CDT.
  CHARLOTTE AROUND 230 AM CDT.
  JOURDANTON AROUND 240 AM CDT.
  CHRISTINE AROUND 245 AM CDT.

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE THREE
OAKS...COUGHRAN...HINDES...DAVIS...DOBROWOLSKI AND AMPHION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A
MOBILE HOME...OR IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 2882 9930 2901 9924 2900 9838 2864 9842
      2864 9858
TIME...MOT...LOC 0653Z 277DEG 44KT 2890 9919 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

CP

1 follow-up statement

814 
WWUS54 KEWX 270732
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
232 AM CDT MON APR 27 2015

TXC013-163-270742-
/O.CAN.KEWX.TO.W.0005.000000T0000Z-150427T0800Z/
ATASCOSA TX-FRIO TX-
232 AM CDT MON APR 27 2015

...THE TORNADO WARNING FOR SOUTHWESTERN ATASCOSA AND CENTRAL FRIO
COUNTIES IS CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS CAPABLE OF PRODUCING A TORNADO.
THEREFORE THE WARNING HAS BEEN CANCELLED.  HOWEVER GUSTY WINDS AND
HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 AM CDT FOR SOUTH CENTRAL
TEXAS.

LAT...LON 2882 9930 2901 9924 2900 9838 2864 9842
      2864 9858
TIME...MOT...LOC 0729Z 277DEG 44KT 2884 9865 

$$

CP

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 26, 9:27 PM CDT	Special Weather Statement	EWX	Val Verde	63 min
Apr 26, 9:39 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Val Verde	66 min
Apr 26, 10:21 PM CDT	Special Weather Statement	EWX	Kinney	39 min
Apr 26, 10:40 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kerr, Real, Val Verde	65 min
Apr 26, 10:51 PM CDT	Special Weather Statement	EWX	Kinney	54 min
Apr 26, 11:04 PM CDT	Severe Thunderstorm Warning	EWX	Gillespie, Kerr, Llano	56 min
Apr 26, 11:14 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Uvalde, Val Verde	31 min
Apr 26, 11:21 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Gillespie, Kerr, Real	39 min
Apr 26, 11:40 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Edwards, Kinney, Maverick, Medina, Real and 2 more	35 min
Apr 26, 11:49 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Blanco, Burnet, Gillespie, Kendall, Kerr and 1 more	71 min
Apr 27, 12:14 AM CDT	Severe Thunderstorm Warning	EWX	Bandera, Medina, Real, Uvalde	46 min
Apr 27, 12:38 AM CDT	Tornado Warning	EWX	Frio, Medina, Uvalde	52 min
Apr 27, 12:44 AM CDT	Severe Thunderstorm Warning	EWX	Bandera, Bexar, Blanco, Burnet, Caldwell, Comal and 9 more	61 min
Apr 27, 12:47 AM CDT	Special Weather Statement	EWX	Dimmit, Frio, Maverick, Zavala	58 min
Apr 27, 1:24 AM CDT	Tornado Warning	EWX	Atascosa, Frio, Medina	66 min
Apr 27, 1:38 AM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Bastrop, Bexar, Caldwell, Comal, Dimmit and 13 more	52 min
Apr 27, 2:24 AM CDT	Tornado Warning	EWX	Atascosa, Wilson	36 min
Apr 27, 2:30 AM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Caldwell, Fayette, Gonzales, Lavaca, Lee and 2 more	45 min
Apr 27, 3:00 AM CDT	Severe Thunderstorm Warning	EWX	DeWitt, Gonzales, Karnes, Wilson	60 min
Apr 27, 3:55 AM CDT	Special Weather Statement	EWX	DeWitt	35 min

Nearby

Tornado Warnings in Texas, 2015 Every tornado warning in 2015 Tornadoes in 2015

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.