Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 55, NWS Amarillo, TX

May 15, 2021Dallam County, Hartley County, Texas; Cimarron County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at May 15, 2021, 7:40 PM CDT for Dallam County, Hartley County, Texas; Cimarron County, Oklahoma. It was in force for 20 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 15, 2021, 7:40 PM CDT (00:40 UTC)
Expired: May 15, 2021, 8:00 PM CDT
In force: 20 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cimarron County, OK, Dallam County, TX, Hartley County, TX

The radar

The Amarillo radar (KAMA), 150 km from the middle of the area, began a volume at 00:43 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 15, 3:49 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 0.7 hours before the alert went out and 151 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: 826 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 1913 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 161 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.0

Open this sounding in Storm Lab

The text

As transmitted.

263 
WUUS54 KAMA 160040
SVRAMA
OKC025-TXC111-205-160100-
/O.NEW.KAMA.SV.W.0055.210516T0040Z-210516T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
740 PM CDT Sat May 15 2021

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  South central Cimarron County in the Panhandle of Oklahoma...
  Western Dallam County in the Panhandle of Texas...
  Northwestern Hartley County in the Panhandle of Texas...

* Until 800 PM CDT.

* At 740 PM CDT, a severe thunderstorm was located 9 miles southeast
  of Sedan, or 15 miles northeast of Amistad, moving northeast at 25
  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...
  Ware.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3627 10304 3668 10238 3615 10247 3591 10304
TIME...MOT...LOC 0040Z 226DEG 23KT 3608 10297 

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

Rutt

1 follow-up statement

200 
WWUS54 KAMA 160059
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
759 PM CDT Sat May 15 2021

OKC025-TXC111-205-160109-
/O.EXP.KAMA.SV.W.0055.000000T0000Z-210516T0100Z/
Cimarron OK-Dallam TX-Hartley TX-
759 PM CDT Sat May 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CIMARRON...
WESTERN DALLAM AND NORTHWESTERN HARTLEY COUNTIES WILL EXPIRE AT 800
PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However small hail
and gusty winds are still possible with this thunderstorm.

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

LAT...LON 3627 10304 3668 10238 3615 10247 3591 10304
TIME...MOT...LOC 0059Z 226DEG 23KT 3615 10288 

$$

Rutt

The office that day

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

Issued	Product	Office	Counties	Lasted
May 15, 9:09 PM CDT	Special Weather Statement	AMA	Sherman	36 min
May 15, 9:22 PM CDT	Severe Thunderstorm Warning	AMA	Moore, Sherman	23 min
May 15, 9:27 PM CDT	Special Weather Statement	AMA	Potter	33 min
May 15, 9:32 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham, Potter, Randall	28 min
May 15, 9:49 PM CDT	Severe Thunderstorm Warning	AMA	Hansford, Hutchinson, Moore, Sherman	16 min
May 15, 9:59 PM CDT	Severe Thunderstorm Warning	AMA	Hansford	28 min
May 15, 10:14 PM CDT	Special Weather Statement	AMA	Randall	31 min
May 15, 10:36 PM CDT	Special Weather Statement	AMA	Armstrong	24 min
May 15, 11:11 PM CDT	Special Weather Statement	AMA	Potter	64 min
May 15, 11:32 PM CDT	Special Weather Statement	AMA	Ochiltree	58 min
May 15, 11:47 PM CDT	Areal Flood Advisory	AMA	Potter, Randall	3 hr
May 16, 4:25 PM CDT	Special Weather Statement	AMA	Potter	35 min
May 16, 4:34 PM CDT	Severe Thunderstorm Warning	AMA	Moore, Potter	56 min
May 16, 4:37 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Potter, Randall	68 min
May 16, 4:46 PM CDT	Severe Thunderstorm Warning	AMA	Potter, Randall	59 min
May 16, 5:22 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham	53 min
May 16, 5:45 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Potter, Randall	60 min
May 16, 5:57 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Moore, Potter	63 min
May 16, 6:12 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham	63 min
May 16, 6:33 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Potter, Randall	44 min
May 16, 6:41 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	64 min
May 16, 6:48 PM CDT	Areal Flood Advisory	AMA	Deaf Smith, Randall	3 hr
May 15, 9:51 PM CDT	Special Weather Statement	AMA	Texas	24 min
May 15, 11:54 PM CDT	Special Weather Statement	AMA	Beaver	66 min

Nearby

Severe Thunderstorm Warnings in Texas, 2021 Severe Thunderstorm Warnings in Oklahoma, 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.