Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 89, NWS Amarillo, TX

May 17, 2021Cimarron County, Texas County, Oklahoma; Dallam County, Sherman County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at May 17, 2021, 8:05 PM CDT for Cimarron County, Texas County, Oklahoma; Dallam County, Sherman County, Texas. It was in force for 55 min. 1 report 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: May 17, 2021, 8:05 PM CDT (01:05 UTC)
Expired: May 17, 2021, 9:00 PM CDT
In force: 55 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cimarron County, OK, Texas County, OK, Dallam County, TX, Sherman County, TX

The radar

The Amarillo radar (KAMA), 182 km from the middle of the area, began a volume at 01:05 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
May 17, 8:15 PM CDT	TSTM WND GST 59	2 Se Boise City, OK

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
May 17, 2:39 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 1.1 hours before the alert went out and 182 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.

018 
WUUS54 KAMA 180105
SVRAMA
OKC025-139-TXC111-421-180200-
/O.NEW.KAMA.SV.W.0089.210518T0105Z-210518T0200Z/

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

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  Southwestern Texas County in the Panhandle of Oklahoma...
  Cimarron County in the Panhandle of Oklahoma...
  Northwestern Sherman County in the Panhandle of Texas...
  Northern Dallam County in the Panhandle of Texas...

* Until 900 PM CDT.

* At 805 PM CDT, severe thunderstorms were located along a line
  extending from 7 miles north of Kenton to 12 miles west of Conlen,
  moving northeast at 50 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Boise City, Keyes, Kenton, Wheeless, Black Mesa Park, Felt, Griggs
  and Sturgis.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3699 10202 3647 10202 3646 10304 3650 10304
      3650 10300 3700 10300
TIME...MOT...LOC 0105Z 217DEG 44KT 3700 10293 3630 10245 

HAIL...1.00IN
WIND...60MPH
 
$$

TLH

1 follow-up statement

832 
WWUS54 KAMA 180131
SVSAMA

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

OKC025-139-TXC111-421-180200-
/O.CON.KAMA.SV.W.0089.000000T0000Z-210518T0200Z/
Texas OK-Cimarron OK-Sherman TX-Dallam TX-
831 PM CDT Mon May 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR SOUTHWESTERN TEXAS...CIMARRON...NORTHWESTERN SHERMAN AND NORTHERN
DALLAM COUNTIES...

At 830 PM CDT, automated weather equipment reported severe
thunderstorms were located along a line extending from 11 miles
northwest of Campo to 7 miles southwest of Griggs, moving northeast
at 50 mph.

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

SOURCE...Automated weather equipment measured a wind gust of 59 mph 
         at 815 PM CDT in Boise City.

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

Locations impacted include...
Boise City, Keyes, Kenton, Wheeless, Black Mesa Park, Felt, Griggs
and Sturgis.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3699 10202 3647 10202 3646 10304 3650 10304
      3650 10300 3700 10300
TIME...MOT...LOC 0130Z 217DEG 44KT 3723 10271 3653 10223 

HAIL...1.00IN
WIND...60MPH
 
$$

TLH

The office that day

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

Issued	Product	Office	Counties	Lasted
May 17, 7:15 PM CDT	Severe Thunderstorm Warning	AMA	Cimarron	60 min
May 17, 7:35 PM CDT	Special Weather Statement	AMA	Cimarron	25 min
May 17, 8:56 PM CDT	Special Weather Statement	AMA	Cimarron	49 min
May 17, 9:52 PM CDT	Special Weather Statement	AMA	Texas	23 min
May 17, 10:13 PM CDT	Special Weather Statement	AMA	Beaver, Texas	62 min
May 17, 11:11 PM CDT	Special Weather Statement	AMA	Beaver	49 min
May 18, 1:14 PM CDT	Special Weather Statement	AMA	Cimarron	46 min
May 18, 1:28 PM CDT	Severe Thunderstorm Warning	AMA	Cimarron	51 min
May 17, 7:06 PM CDT	Areal Flood Advisory	AMA	Randall	21 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, 8:06 PM CDT	Flash Flood Warning	AMA	Dallam, Hartley, Oldham	52 min
May 17, 8:09 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Collingsworth, Donley, Gray	66 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 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 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.