Alert archive / Texas / Tornado Warnings in 2017

Tornado Warning 4, NWS Amarillo, TX

April 16, 2017Randall County, Texas

NWS Amarillo, TX issued this tornado warning at Apr 16, 2017, 9:17 PM CDT for Randall County, Texas. It was in force for 13 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 16, 2017, 9:17 PM CDT (02:17 UTC)
Expired: Apr 16, 2017, 9:30 PM CDT
In force: 13 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.75 in

County Randall County, TX

The radar

The Amarillo radar (KAMA), 39 km from the middle of the area, began a volume at 02:20 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 nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 2.3 hours before the alert went out and 38 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: 908 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 2134 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted.

358 
WFUS54 KAMA 170217
TORAMA
TXC381-170230-
/O.NEW.KAMA.TO.W.0004.170417T0217Z-170417T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Amarillo TX
917 PM CDT SUN APR 16 2017

The National Weather Service in Amarillo has issued a

* Tornado Warning for...
  Southeastern Randall County in the Panhandle of Texas...

* Until 930 PM CDT
    
* At 916 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 6 miles southwest of Palo Duro Canyon, or 11 miles
  southeast of Canyon, moving southwest at 15 mph.

  HAZARD...Tornado and golf ball size hail. 

  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 tornadic thunderstorm will remain over mainly rural areas of
  southeastern Randall County.

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 3492 10177 3491 10172 3484 10171 3485 10183
TIME...MOT...LOC 0216Z 037DEG 12KT 3489 10176 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

14

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 16, 7:29 PM CDT	Special Weather Statement	AMA	Roberts	31 min
Apr 16, 7:41 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Donley, Gray	64 min
Apr 16, 7:43 PM CDT	Severe Thunderstorm Warning	AMA	Roberts	14 min
Apr 16, 7:44 PM CDT	Severe Thunderstorm Warning	AMA	Ochiltree, Roberts	38 min
Apr 16, 8:07 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Donley	53 min
Apr 16, 8:17 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Donley	43 min
Apr 16, 8:22 PM CDT	Special Weather Statement	AMA	Ochiltree	23 min
Apr 16, 8:41 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	49 min
Apr 16, 8:53 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson	37 min
Apr 16, 8:56 PM CDT	Special Weather Statement	AMA	Armstrong	64 min
Apr 16, 9:13 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	49 min
Apr 16, 9:28 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	62 min
Apr 16, 9:40 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	45 min
Apr 16, 9:43 PM CDT	Special Weather Statement	AMA	Carson	47 min
Apr 16, 10:05 PM CDT	Special Weather Statement	AMA	Donley	55 min
Apr 16, 10:51 PM CDT	Special Weather Statement	AMA	Hemphill	54 min
Apr 16, 11:52 PM CDT	Special Weather Statement	AMA	Hemphill	23 min
Apr 17, 12:22 AM CDT	Special Weather Statement	AMA	Hemphill	38 min
Apr 17, 1:02 AM CDT	Special Weather Statement	AMA	Hemphill	43 min

Nearby

Tornado Warnings in Texas, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.