Alert archive / Texas / Tornado Warnings in 2017

Tornado Warning 3, NWS Amarillo, TX

April 16, 2017Gray County, Texas

NWS Amarillo, TX issued this tornado warning at Apr 16, 2017, 6:36 PM CDT for Gray 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, 6:36 PM CDT (23:36 UTC)
Expired: Apr 16, 2017, 6:49 PM CDT
In force: 13 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.75 in

County Gray County, TX

The radar

The Amarillo radar (KAMA), 64 km from the middle of the area, began a volume at 23:38 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 16, 3:37 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 11.6 hours before the alert went out and 64 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: 622 J/kg
Mixed-layer CIN: -229 J/kg
Mixed-layer LCL: 1431 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 4 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

842 
WFUS54 KAMA 162336
TORAMA
TXC179-170000-
/O.NEW.KAMA.TO.W.0003.170416T2336Z-170417T0000Z/

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

The National Weather Service in Amarillo has issued a

* Tornado Warning for...
  Southwestern Gray County in the Panhandle of Texas...

* Until 700 PM CDT
    
* At 635 PM CDT, a severe thunderstorm capable of producing a 
  tornado was located 8 miles northeast of Groom, or 16 miles south 
  of Pampa, and is nearly stationary.

  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
  southwestern Gray 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 3531 10104 3533 10099 3527 10092 3524 10103
TIME...MOT...LOC 2334Z 326DEG 4KT 3531 10101 

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

$$

14

1 follow-up statement

742 
WWUS54 KAMA 162349
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
649 PM CDT SUN APR 16 2017

TXC179-162358-
/O.CAN.KAMA.TO.W.0003.000000T0000Z-170417T0000Z/
Gray TX-
649 PM CDT SUN APR 16 2017

...THE TORNADO WARNING FOR SOUTHWESTERN GRAY COUNTY IS CANCELLED...
                
The storm which prompted the warning has weakened, and no longer 
appears capable of producing a tornado. Therefore the warning has 
been cancelled.  However large hail is still possible with this 
thunderstorm.

A severe thunderstorm watch remains in effect until 1000 PM CDT for
the Panhandle of Texas.

Remember, a Severe Thunderstorm Warning still remains in effect for 
southeastern Carson and southwestern Gray Counties until 7:45 PM. 

LAT...LON 3531 10104 3533 10099 3527 10092 3524 10103
TIME...MOT...LOC 2346Z 326DEG 4KT 3530 10100 

$$

14

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 16, 4:54 PM CDT	Special Weather Statement	AMA	Gray	36 min
Apr 16, 5:17 PM CDT	Severe Thunderstorm Warning	AMA	Gray	58 min
Apr 16, 5:53 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Gray	67 min
Apr 16, 6:47 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Gray	58 min
Apr 16, 6:58 PM CDT	Special Weather Statement	AMA	Roberts	32 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.