Alert archive / Texas / Tornado Warnings in 2021

Tornado Warning 39, NWS Amarillo, TX

August 16, 2021Roberts County, Texas

NWS Amarillo, TX issued this tornado warning at Aug 16, 2021, 1:11 PM CDT for Roberts County, Texas. It was in force for 34 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: Aug 16, 2021, 1:11 PM CDT (18:11 UTC)
Expired: Aug 16, 2021, 1:45 PM CDT
In force: 34 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Roberts County, TX

The radar

The Amarillo radar (KAMA), 83 km from the middle of the area, began a volume at 18:11 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 12:00Z, 6.2 hours before the alert went out and 82 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: 894 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 1213 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 59 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

794 
WFUS54 KAMA 161811
TORAMA
TXC393-161845-
/O.NEW.KAMA.TO.W.0039.210816T1811Z-210816T1845Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Amarillo TX
111 PM CDT Mon Aug 16 2021

The National Weather Service in Amarillo has issued a

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

* Until 145 PM CDT.
    
* At 111 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 7 miles north of Pampa, moving southeast at 10 mph.

  HAZARD...Tornado and quarter 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 Roberts 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 3569 10104 3573 10096 3562 10078 3562 10102
TIME...MOT...LOC 1811Z 318DEG 7KT 3566 10099 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

MJG

1 follow-up statement

433 
WWUS54 KAMA 161836
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
136 PM CDT Mon Aug 16 2021

TXC393-161845-
/O.EXP.KAMA.TO.W.0039.000000T0000Z-210816T1845Z/
Roberts TX-
136 PM CDT Mon Aug 16 2021

...THE TORNADO WARNING FOR SOUTHWESTERN ROBERTS COUNTY WILL EXPIRE AT
145 PM CDT...
    
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, large hail and damaging winds remain likely and a
Severe Thunderstorm Warning remains in effect for the area.  However
small hail and gusty winds are still possible with this thunderstorm.

LAT...LON 3569 10104 3573 10096 3562 10078 3562 10102
TIME...MOT...LOC 1835Z 318DEG 7KT 3563 10095 

$$

MJG

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 7:21 AM CDT	Areal Flood Advisory	AMA	Gray, Roberts	3 hr
Aug 16, 7:25 AM CDT	Special Weather Statement	AMA	Roberts	35 min
Aug 16, 10:02 AM CDT	Areal Flood Advisory	AMA	Lipscomb	118 min
Aug 16, 10:43 AM CDT	Special Weather Statement	AMA	Ochiltree	32 min
Aug 16, 12:39 PM CDT	Severe Thunderstorm Warning	AMA	Roberts	66 min
Aug 16, 12:57 PM CDT	Special Weather Statement	AMA	Hutchinson	33 min
Aug 16, 1:28 PM CDT	Special Weather Statement	AMA	Oldham	32 min
Aug 16, 1:42 PM CDT	Severe Thunderstorm Warning	AMA	Gray, Roberts	63 min
Aug 16, 1:54 PM CDT	Areal Flood Advisory	AMA	Gray	39 min
Aug 16, 2:09 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Gray	51 min
Aug 16, 2:24 PM CDT	Special Weather Statement	AMA	Moore	36 min
Aug 16, 2:33 PM CDT	Flash Flood Warning	AMA	Gray, Roberts	2 hr
Aug 16, 2:54 PM CDT	Severe Thunderstorm Warning Considerable damage threat	AMA	Carson, Gray	51 min
Aug 16, 3:18 PM CDT	Severe Thunderstorm Warning Considerable damage threat	AMA	Donley, Gray	57 min
Aug 16, 3:30 PM CDT	Areal Flood Advisory	AMA	Armstrong, Carson	3 hr
Aug 16, 4:12 PM CDT	Special Weather Statement	AMA	Donley	33 min
Aug 16, 4:24 PM CDT	Areal Flood Advisory	AMA	Randall	3 hr
Aug 16, 4:29 PM CDT	Areal Flood Advisory	AMA	Deaf Smith, Oldham	3 hr

Nearby

Tornado Warnings in Texas, 2021 Every tornado warning in 2021 Tornadoes in 2021

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.