Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 99, NWS Amarillo, TX

May 23, 2021Cimarron County, Oklahoma; Dallam County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at May 23, 2021, 6:05 PM CDT for Cimarron County, Oklahoma; Dallam County, Texas. It was in force for 38 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 23, 2021, 6:05 PM CDT (23:05 UTC)
Expired: May 23, 2021, 6:43 PM CDT
In force: 38 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

Counties Cimarron County, OK, Dallam County, TX

The radar

The Amarillo radar (KAMA), 148 km from the middle of the area, began a volume at 23:08 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 23, 5:07 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 11.1 hours before the alert went out and 148 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: 641 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 510 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 98 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

396 
WUUS54 KAMA 232305
SVRAMA
OKC025-TXC111-240000-
/O.NEW.KAMA.SV.W.0099.210523T2305Z-210524T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
605 PM CDT Sun May 23 2021

The National Weather Service in Amarillo has issued a

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

* Until 700 PM CDT.

* At 605 PM CDT, a severe thunderstorm was located 6 miles northeast
  of Ware, or 16 miles northwest of Dalhart, moving northeast at 20
  mph.

  HAZARD...70 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect some tree damage. Damage is likely to mobile 
           homes, roofs, and outbuildings. Hail damage to vehicles 
           is expected.

* Locations impacted include...
  Ware and Felt. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3615 10259 3619 10280 3668 10278 3657 10223
TIME...MOT...LOC 2305Z 207DEG 19KT 3627 10264 

HAIL...1.00IN
WIND...70MPH
 
$$

Bieda

3 follow-up statements

773 
WWUS54 KAMA 232328
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
628 PM CDT Sun May 23 2021

OKC025-TXC111-240000-
/O.CON.KAMA.SV.W.0099.000000T0000Z-210524T0000Z/
Cimarron OK-Dallam TX-
628 PM CDT Sun May 23 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR SOUTH CENTRAL CIMARRON AND CENTRAL DALLAM COUNTIES...

At 627 PM CDT, a severe thunderstorm was located 16 miles northeast
of Ware, or 22 miles north of Dalhart, moving northeast at 25 mph.

HAZARD...70 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect some tree damage. Damage is likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Ware.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3615 10259 3619 10280 3665 10265 3657 10223
TIME...MOT...LOC 2327Z 207DEG 20KT 3639 10256 

HAIL...0.75IN
WIND...70MPH
 
$$

Bieda

356 
WWUS54 KAMA 232339
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
639 PM CDT Sun May 23 2021

OKC025-TXC111-240000-
/O.CON.KAMA.SV.W.0099.000000T0000Z-210524T0000Z/
Cimarron OK-Dallam TX-
639 PM CDT Sun May 23 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR SOUTH CENTRAL CIMARRON AND CENTRAL DALLAM COUNTIES...

At 639 PM CDT, a severe thunderstorm was located 17 miles northwest
of Conlen, or 21 miles south of Boise City, moving northeast at 20
mph.

HAZARD...70 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect some tree damage. Damage is likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Ware.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3615 10259 3618 10274 3663 10256 3657 10223
TIME...MOT...LOC 2339Z 216DEG 19KT 3642 10247 

HAIL...0.75IN
WIND...70MPH
 
$$

Bieda

111 
WWUS54 KAMA 232343
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
643 PM CDT Sun May 23 2021

OKC025-TXC111-232352-
/O.CAN.KAMA.SV.W.0099.000000T0000Z-210524T0000Z/
Cimarron OK-Dallam TX-
643 PM CDT Sun May 23 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CIMARRON AND
CENTRAL DALLAM COUNTIES IS CANCELLED...
                
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 has been cancelled.

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

LAT...LON 3615 10259 3618 10274 3663 10256 3657 10223
TIME...MOT...LOC 2336Z 207DEG 19KT 3644 10246 

$$

Bieda

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 4:44 PM CDT	Special Weather Statement	AMA	Hartley	31 min
May 23, 5:10 PM CDT	Special Weather Statement	AMA	Dallam	35 min
May 23, 5:32 PM CDT	Special Weather Statement	AMA	Dallam, Hartley	43 min
May 23, 5:39 PM CDT	Severe Thunderstorm Warning	AMA	Dallam, Hartley, Oldham	39 min
May 23, 6:52 PM CDT	Special Weather Statement	AMA	Hartley	38 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.