Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 90, NWS Amarillo, TX

May 17, 20214 counties in Texas

NWS Amarillo, TX issued this severe thunderstorm warning at May 17, 2021, 8:09 PM CDT for 4 counties in Texas. It was in force for 66 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: May 17, 2021, 8:09 PM CDT (01:09 UTC)
Expired: May 17, 2021, 9:15 PM CDT
In force: 66 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Armstrong County, TX, Collingsworth County, TX, Donley County, TX, Gray County, TX

The radar

The Amarillo radar (KAMA), 73 km from the middle of the area, began a volume at 01:10 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
May 17, 2:39 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 1.2 hours before the alert went out and 72 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: 1013 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 1616 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.3

Open this sounding in Storm Lab

The text

As transmitted.

812 
WUUS54 KAMA 180109
SVRAMA
TXC011-087-129-179-180215-
/O.NEW.KAMA.SV.W.0090.210518T0109Z-210518T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
809 PM CDT Mon May 17 2021

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  Southeastern Armstrong County in the Panhandle of Texas...
  Gray County in the Panhandle of Texas...
  Southwestern Collingsworth County in the Panhandle of Texas...
  Donley County in the Panhandle of Texas...

* Until 915 PM CDT.

* At 809 PM CDT, a severe thunderstorm was located 5 miles east of
  Howardwick, or 7 miles northeast of Clarendon, moving north at 25
  mph.

  HAZARD...60 mph wind gusts and nickel size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to roofs, siding, and trees is possible.

* Locations impacted include...
  Clarendon, Mclean, Lefors, Howardwick, Hedley, Lelia Lake, Lake
  Mcclellan, Kingsmill, Alanreed and Greenbelt Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3475 10110 3518 10109 3519 10109 3551 10108
      3544 10054 3475 10053
TIME...MOT...LOC 0109Z 187DEG 20KT 3502 10081 

HAIL...0.88IN
WIND...60MPH
 
$$

Guerrero

1 follow-up statement

984 
WWUS54 KAMA 180138
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
838 PM CDT Mon May 17 2021

TXC011-087-129-179-180215-
/O.CON.KAMA.SV.W.0090.000000T0000Z-210518T0215Z/
Armstrong TX-Gray TX-Collingsworth TX-Donley TX-
838 PM CDT Mon May 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR SOUTHEASTERN ARMSTRONG...GRAY...SOUTHWESTERN COLLINGSWORTH AND
DONLEY COUNTIES...

At 836 PM CDT, a severe thunderstorm was located near Lake 
Mcclellan, or 17 miles north of Clarendon, moving north at 25 mph. A 
storm southwest of Brice is moving northeast and may have hail of 
ping pong ball size. 

HAZARD...60 mph wind gusts and nickel size hail. 

SOURCE...Radar indicated.

IMPACT...Minor damage to roofs, siding, and trees is possible.

Locations impacted include...
Clarendon, Mclean, Lefors, Howardwick, Hedley, Lelia Lake, Lake
Mcclellan, Kingsmill, Alanreed and Greenbelt Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3475 10110 3518 10109 3519 10109 3551 10108
      3544 10054 3475 10053
TIME...MOT...LOC 0136Z 175DEG 22KT 3519 10083 

HAIL...0.88IN
WIND...60MPH
 
$$

Beat

The office that day

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

Issued	Product	Office	Counties	Lasted
May 17, 7:06 PM CDT	Areal Flood Advisory	AMA	Randall	21 min
May 17, 7:15 PM CDT	Severe Thunderstorm Warning	AMA	Dallam, Hartley, Moore, Sherman	60 min
May 17, 7:15 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Hartley, Moore, Oldham, Potter, Randall	60 min
May 17, 7:27 PM CDT	Flash Flood Warning	AMA	Randall	3 hr
May 17, 7:30 PM CDT	Areal Flood Advisory	AMA	Dallam, Hartley, Oldham	36 min
May 17, 7:33 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Randall	27 min
May 17, 7:35 PM CDT	Areal Flood Advisory	AMA	Potter, Randall	3 hr
May 17, 7:36 PM CDT	Special Weather Statement	AMA	Moore	24 min
May 17, 7:59 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Hartley, Hutchinson, Moore, Potter and 1 more	76 min
May 17, 8:05 PM CDT	Severe Thunderstorm Warning	AMA	Dallam, Sherman	55 min
May 17, 8:06 PM CDT	Flash Flood Warning	AMA	Dallam, Hartley, Oldham	52 min
May 17, 8:41 PM CDT	Special Weather Statement	AMA	Dallam, Sherman	34 min
May 17, 9:08 PM CDT	Severe Thunderstorm Warning	AMA	Gray, Roberts	67 min
May 17, 9:15 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Hansford, Hutchinson, Moore, Ochiltree, Potter and 2 more	60 min
May 17, 9:52 PM CDT	Special Weather Statement	AMA	Hansford, Hemphill, Ochiltree, Roberts	23 min
May 17, 10:13 PM CDT	Special Weather Statement	AMA	Hemphill, Lipscomb, Ochiltree, Roberts	62 min
May 17, 11:11 PM CDT	Special Weather Statement	AMA	Lipscomb	49 min
May 18, 6:43 AM CDT	Dense Fog Advisory	AMA	Armstrong, Carson, Deaf Smith, Oldham, Potter, Randall	2 hr
May 18, 10:31 AM CDT	Special Weather Statement	AMA	Deaf Smith	44 min
May 18, 2:43 PM CDT	Special Weather Statement	AMA	Deaf Smith	62 min
May 18, 2:53 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham	97 min
May 18, 3:21 PM CDT	Special Weather Statement	AMA	Carson	39 min
May 18, 4:00 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham, Potter	90 min
May 18, 4:16 PM CDT	Special Weather Statement	AMA	Carson	44 min
May 18, 5:19 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Moore, Oldham, Potter, Randall	86 min
May 18, 5:26 PM CDT	Areal Flood Advisory	AMA	Potter, Randall	3 hr
May 18, 5:27 PM CDT	Special Weather Statement	AMA	Carson	33 min
May 18, 5:45 PM CDT	Areal Flood Advisory	AMA	Armstrong, Carson, Hutchinson	3 hr
May 18, 6:03 PM CDT	Special Weather Statement	AMA	Carson	42 min
May 18, 6:28 PM CDT	Special Weather Statement	AMA	Hutchinson	47 min

Nearby

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.