Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 53, NWS Amarillo, TX

May 15, 2021Cimarron County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at May 15, 2021, 6:41 PM CDT for Cimarron County, Oklahoma. 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: May 15, 2021, 6:41 PM CDT (23:41 UTC)
Expired: May 15, 2021, 7:15 PM CDT
In force: 34 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Cimarron County, OK

The radar

The Amarillo radar (KAMA), 205 km from the middle of the area, began a volume at 23:41 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 12:00Z, 11.7 hours before the alert went out and 206 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: 390 J/kg
Mixed-layer CIN: -372 J/kg
Mixed-layer LCL: 1465 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 167 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

282 
WUUS54 KAMA 152341
SVRAMA
OKC025-160015-
/O.NEW.KAMA.SV.W.0053.210515T2341Z-210516T0015Z/

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

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  North central Cimarron County in the Panhandle of Oklahoma...

* Until 715 PM CDT.

* At 641 PM CDT, a severe thunderstorm was located 8 miles south of
  Campo, or 18 miles north of Boise City, and is nearly stationary.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will remain over mainly rural areas of
  north central Cimarron County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3699 10232 3681 10273 3700 10287
TIME...MOT...LOC 2341Z 334DEG 0KT 3699 10261 

HAIL...1.25IN
WIND...60MPH
 
$$

Rutt

The office that day

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

Issued	Product	Office	Counties	Lasted
May 15, 6:30 PM CDT	Special Weather Statement	AMA	Cimarron	30 min
May 15, 6:57 PM CDT	Severe Thunderstorm Warning	AMA	Cimarron	63 min

Nearby

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.