Alert archive / Texas / Tornado Warnings in 2015

Tornado Warning 2, NWS Amarillo, TX

April 11, 20154 counties in Texas

NWS Amarillo, TX issued this tornado warning at Apr 11, 2015, 6:17 PM CDT for 4 counties in Texas. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 11, 2015, 6:17 PM CDT (23:17 UTC)
Expired: Apr 11, 2015, 6:44 PM CDT
In force: 27 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Carson County, TX, Hutchinson County, TX, Moore County, TX, Potter County, TX

The radar

The Amarillo radar (KAMA), 50 km from the middle of the area, began a volume at 23:18 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.

Issued	Product	Office	Lasted
Apr 11, 3:43 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 11.3 hours before the alert went out and 50 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: 8 J/kg
Mixed-layer CIN: -416 J/kg
Mixed-layer LCL: 1063 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 173 m²/s²
0-3 km storm-relative helicity: 197 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

253 
WFUS54 KAMA 112317
TORAMA
TXC065-233-341-375-120000-
/O.NEW.KAMA.TO.W.0002.150411T2317Z-150412T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
617 PM CDT SAT APR 11 2015

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN CARSON COUNTY IN THE PANHANDLE OF TEXAS...
  SOUTHWESTERN HUTCHINSON COUNTY IN THE PANHANDLE OF TEXAS...
  SOUTHEASTERN MOORE COUNTY IN THE PANHANDLE OF TEXAS...
  NORTHEASTERN POTTER COUNTY IN THE PANHANDLE OF TEXAS...

* UNTIL 700 PM CDT

* AT 614 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR MASTERSON...AND MOVING EAST AT 35 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.

* LOCATIONS IMPACTED INCLUDE...
  BORGER...             MASTERSON...          LAKE MEREDITH...
  SANFORD...            FRITCH...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3580 10132 3554 10122 3553 10195 3566 10196
TIME...MOT...LOC 2317Z 258DEG 32KT 3559 10186

TORNADO...RADAR INDICATED
HAIL...<1.00IN

$$

CLK

1 follow-up statement

011 
WWUS54 KAMA 112344
SVSAMA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
644 PM CDT SAT APR 11 2015

TXC065-233-341-375-112354-
/O.CAN.KAMA.TO.W.0002.000000T0000Z-150412T0000Z/
HUTCHINSON TX-MOORE TX-POTTER TX-CARSON TX-
644 PM CDT SAT APR 11 2015

...THE TORNADO WARNING FOR NORTHWESTERN CARSON...NORTHEASTERN
POTTER...SOUTHEASTERN MOORE AND SOUTHWESTERN HUTCHINSON COUNTIES IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 9 PM CDT!

LAT...LON 3580 10132 3554 10122 3553 10195 3566 10196
TIME...MOT...LOC 2344Z 258DEG 32KT 3564 10157

$$

14

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 11, 4:52 AM CDT	Special Weather Statement	AMA	Hartley	38 min
Apr 11, 6:31 AM CDT	Special Weather Statement	AMA	Hutchinson	44 min
Apr 11, 6:59 AM CDT	Special Weather Statement	AMA	Hutchinson	46 min
Apr 11, 7:43 AM CDT	Special Weather Statement	AMA	Hutchinson	47 min
Apr 11, 8:16 AM CDT	Special Weather Statement	AMA	Lipscomb	14 min
Apr 11, 9:15 AM CDT	Special Weather Statement	AMA	Hansford	15 min
Apr 11, 4:11 PM CDT	Special Weather Statement	AMA	Hartley	49 min
Apr 11, 4:54 PM CDT	Special Weather Statement	AMA	Moore	51 min
Apr 11, 5:00 PM CDT	Severe Thunderstorm Warning	AMA	Hartley, Moore, Oldham	60 min
Apr 11, 5:39 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Hutchinson, Moore, Potter	66 min
Apr 11, 5:51 PM CDT	Tornado Warning	AMA	Moore, Potter	39 min
Apr 11, 6:30 PM CDT	Special Weather Statement	AMA	Armstrong	45 min
Apr 11, 6:31 PM CDT	Tornado Warning	AMA	Carson, Potter	44 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.