Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 277, NWS Amarillo, TX

October 12, 2021Beaver County, Texas County, Oklahoma; Hansford County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Oct 12, 2021, 8:52 PM CDT for Beaver County, Texas County, Oklahoma; Hansford County, Texas. It was in force for 53 min. 4 reports 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: Oct 12, 2021, 8:52 PM CDT (01:52 UTC)
Expired: Oct 12, 2021, 9:45 PM CDT
In force: 53 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Damage threat: Considerable
Hail: 1.75 in
Wind: 70.0 mph

Counties Beaver County, OK, Texas County, OK, Hansford County, TX

The radar

The Amarillo radar (KAMA), 157 km from the middle of the area, began a volume at 01:56 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
Oct 12, 8:58 PM CDT	TSTM WND GST 67	1 Wsw Guymon, OK	ASOS STATION KGUY GUYMON.
Oct 12, 9:14 PM CDT	HAIL 1.75	6 S Optima, OK
Oct 12, 9:24 PM CDT	TSTM WND GST 58	5 Ne Hooker, OK	MESONET STATION UP333 4.7 NE HOOKER (UPR).
Oct 12, 9:24 PM CDT	TSTM WND GST 60	9 Nw Waka, TX	WEST TEXAS MESONET STATION PALO DURO RESERVOIR 1NW.

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
Oct 12, 5:34 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 1.9 hours before the alert went out and 157 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: 165 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 2910 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 141 m²/s²
0-3 km storm-relative helicity: 172 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

722 
WUUS54 KAMA 130152
SVRAMA
OKC007-139-TXC195-130245-
/O.NEW.KAMA.SV.W.0277.211013T0152Z-211013T0245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
852 PM CDT Tue Oct 12 2021

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  Northwestern Beaver County in the Panhandle of Oklahoma...
  Eastern Texas County in the Panhandle of Oklahoma...
  Northern Hansford County in the Panhandle of Texas...

* Until 945 PM CDT.

* At 852 PM CDT, severe thunderstorms were located along a line
  extending from 7 miles west of Hooker to 11 miles south of
  Goodwell, moving northeast at 35 mph.

  HAZARD...Golf ball size hail and 70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect some tree damage. Damage is likely to mobile 
           homes, roofs, and outbuildings. People and animals 
           outdoors will be injured. Expect hail damage to roofs, 
           siding, windows, and vehicles.

* Locations impacted include...
  Guymon, Hooker, Goodwell, Tyrone, Optima, Hardesty, Baker, Adams
  and Turpin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CDT for the Panhandle
of Oklahoma...and the Panhandle of Texas.

For your protection move to an interior room on the lowest floor of a
building.

A Tornado Watch remains in effect until 1100 PM CDT for the Panhandle
of Oklahoma...and the Panhandle of Texas.

&&

LAT...LON 3665 10099 3634 10119 3632 10162 3650 10163
      3650 10168 3658 10169 3700 10146 3700 10081
TIME...MOT...LOC 0152Z 235DEG 30KT 3688 10134 3644 10156 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Ward

2 follow-up statements

834 
WWUS54 KAMA 130206
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
906 PM CDT Tue Oct 12 2021

OKC007-139-TXC195-130245-
/O.CON.KAMA.SV.W.0277.000000T0000Z-211013T0245Z/
Beaver OK-Texas OK-Hansford TX-
906 PM CDT Tue Oct 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM CDT
FOR NORTHWESTERN BEAVER...EASTERN TEXAS AND NORTHERN HANSFORD
COUNTIES...

At 904 PM CDT, automated weather equipment reported severe
thunderstorms were located along a line extending from 5 miles
northwest of Hooker to 11 miles southeast of Goodwell, moving
northeast at 35 mph.

HAZARD...Golf ball size hail and 70 mph wind gusts.

SOURCE...Automated weather equipment at Guymon Airport reported a 67 
         mph gust at 8:58 PM.

IMPACT...Expect some tree damage. Damage is likely to mobile homes, 
         roofs, and outbuildings. People and animals outdoors will 
         be injured. Expect hail damage to roofs, siding, windows, 
         and vehicles.

Locations impacted include...
Guymon, Hooker, Tyrone, Optima, Hardesty, Baker, Adams and Turpin. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CDT for the Panhandle
of Oklahoma...and the Panhandle of Texas.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3665 10099 3634 10119 3632 10162 3650 10163
      3661 10157 3683 10155 3700 10146 3700 10081
TIME...MOT...LOC 0204Z 235DEG 30KT 3693 10125 3649 10147 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Ward

668 
WWUS54 KAMA 130228
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
928 PM CDT Tue Oct 12 2021

OKC007-139-TXC195-130245-
/O.CON.KAMA.SV.W.0277.000000T0000Z-211013T0245Z/
Beaver OK-Texas OK-Hansford TX-
928 PM CDT Tue Oct 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM CDT
FOR NORTHWESTERN BEAVER...EASTERN TEXAS AND NORTHEASTERN HANSFORD
COUNTIES...

At 927 PM CDT, severe thunderstorms were located along a line
extending from 3 miles southwest of Liberal to 3 miles south of
Hardesty, moving northeast at 50 mph.

HAZARD...Golf ball size hail and 70 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect some tree damage. Damage is likely to mobile homes, 
         roofs, and outbuildings. People and animals outdoors will 
         be injured. Expect hail damage to roofs, siding, windows, 
         and vehicles.

Locations impacted include...
Hooker, Tyrone, Hardesty, Turpin, Baker and Adams. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CDT for the Panhandle
of Oklahoma...and the Panhandle of Texas.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3665 10099 3634 10119 3633 10139 3674 10134
      3700 10125 3700 10081
TIME...MOT...LOC 0227Z 242DEG 43KT 3701 10097 3657 10120 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Ward

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 12, 7:06 PM CDT	Special Weather Statement	AMA	Cimarron, Texas	24 min
Oct 12, 7:57 PM CDT	Severe Thunderstorm Warning	AMA	Cimarron, Texas	63 min
Oct 12, 8:06 PM CDT	Tornado Warning	AMA	Texas	24 min
Oct 12, 8:28 PM CDT	Tornado Warning	AMA	Texas	32 min
Oct 12, 8:35 PM CDT	Tornado Warning	AMA	Texas	25 min
Oct 12, 9:01 PM CDT	Tornado Warning	AMA	Texas	44 min
Oct 12, 9:12 PM CDT	Tornado Warning	AMA	Texas	33 min
Oct 12, 9:34 PM CDT	Severe Thunderstorm Warning Considerable damage threat	AMA	Beaver, Texas	56 min
Oct 12, 9:47 PM CDT	Tornado Warning	AMA	Beaver, Texas	28 min
Oct 12, 9:51 PM CDT	Severe Thunderstorm Warning Considerable damage threat	AMA	Beaver, Texas	54 min
Oct 12, 11:00 PM CDT	Severe Thunderstorm Warning	AMA	Beaver	60 min
Oct 12, 11:59 PM CDT	Severe Thunderstorm Warning Considerable damage threat	AMA	Beaver	61 min
Oct 12, 7:08 PM CDT	Special Weather Statement	AMA	Hartley	37 min
Oct 12, 7:19 PM CDT	Special Weather Statement	AMA	Deaf Smith, Oldham	41 min
Oct 12, 7:33 PM CDT	Special Weather Statement	AMA	Dallam	42 min
Oct 12, 10:02 PM CDT	Special Weather Statement	AMA	Carson	28 min
Oct 12, 10:23 PM CDT	Severe Thunderstorm Warning	AMA	Hansford, Hemphill, Hutchinson, Lipscomb, Ochiltree, Roberts	82 min
Oct 12, 10:30 PM CDT	Special Weather Statement	AMA	Carson, Hutchinson, Roberts	30 min
Oct 12, 10:52 PM CDT	Special Weather Statement	AMA	Carson	23 min
Oct 12, 11:01 PM CDT	Special Weather Statement	AMA	Carson	29 min
Oct 12, 11:42 PM CDT	Special Weather Statement	AMA	Gray	33 min
Oct 13, 12:01 AM CDT	Severe Thunderstorm Warning	AMA	Gray, Hemphill, Roberts, Wheeler	59 min
Oct 13, 12:50 AM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Donley, Gray, Hemphill, Wheeler	55 min
Oct 13, 12:57 AM CDT	Tornado Warning	AMA	Collingsworth, Donley, Gray, Wheeler	33 min
Oct 13, 2:06 AM CDT	Special Weather Statement	AMA	Collingsworth	24 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2021 Severe Thunderstorm Warnings in Texas, 2021 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.