Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 235, NWS Amarillo, TX

August 7, 2021Cimarron County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at Aug 7, 2021, 4:39 PM CDT for Cimarron County, Oklahoma. 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: Aug 7, 2021, 4:39 PM CDT (21:39 UTC)
Expired: Aug 7, 2021, 5:45 PM CDT
In force: 66 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Damage threat: Considerable
Hail: 1.0 in
Wind: 70.0 mph

County Cimarron County, OK

The radar

The Amarillo radar (KAMA), 190 km from the middle of the area, began a volume at 21:40 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
Aug 7, 4:01 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 9.7 hours before the alert went out and 191 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: 24 J/kg
Mixed-layer CIN: -451 J/kg
Mixed-layer LCL: 2679 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 120 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

909 
WUUS54 KAMA 072139
SVRAMA
OKC025-072245-
/O.NEW.KAMA.SV.W.0235.210807T2139Z-210807T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
439 PM CDT Sat Aug 7 2021

The National Weather Service in Amarillo has issued a

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

* Until 545 PM CDT.

* At 439 PM CDT, a severe thunderstorm was located 4 miles southwest
  of Wheeless, or 19 miles northeast of Clayton, moving east 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...
  Boise City, Felt and Wheeless. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3683 10300 3691 10243 3650 10237 3650 10300
TIME...MOT...LOC 2139Z 259DEG 19KT 3665 10294 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

LFM

4 follow-up statements

411 
WWUS54 KAMA 072154
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
454 PM CDT Sat Aug 7 2021

OKC025-072245-
/O.CON.KAMA.SV.W.0235.000000T0000Z-210807T2245Z/
Cimarron OK-
454 PM CDT Sat Aug 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR WESTERN CIMARRON COUNTY...

At 454 PM CDT, a severe thunderstorm was located near Felt, or 20
miles southwest of Boise City, moving east at 20 mph.

HAZARD...70 mph wind gusts and half dollar 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...
Boise City, Felt and Wheeless. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3683 10300 3691 10243 3650 10237 3650 10300
TIME...MOT...LOC 2154Z 276DEG 19KT 3660 10284 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

LFM

680 
WWUS54 KAMA 072211
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
511 PM CDT Sat Aug 7 2021

OKC025-072245-
/O.CON.KAMA.SV.W.0235.000000T0000Z-210807T2245Z/
Cimarron OK-
511 PM CDT Sat Aug 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR WESTERN CIMARRON COUNTY...

At 510 PM CDT, a severe thunderstorm was located 4 miles northeast of
Felt, or 14 miles southwest of Boise City, moving east at 20 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 and Felt. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3684 10291 3691 10243 3650 10237 3650 10285
TIME...MOT...LOC 2210Z 259DEG 19KT 3662 10273 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

LFM

943 
WWUS54 KAMA 072221
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
521 PM CDT Sat Aug 7 2021

OKC025-072245-
/O.CON.KAMA.SV.W.0235.000000T0000Z-210807T2245Z/
Cimarron OK-
521 PM CDT Sat Aug 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTH CENTRAL CIMARRON COUNTY...

At 521 PM CDT, a severe thunderstorm was located 8 miles southwest of
Boise City, moving east at 25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Boise City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3673 10276 3685 10242 3650 10237 3650 10275
TIME...MOT...LOC 2221Z 249DEG 21KT 3667 10264 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

LFM

582 
WWUS54 KAMA 072236
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
536 PM CDT Sat Aug 7 2021

OKC025-072246-
/O.EXP.KAMA.SV.W.0235.000000T0000Z-210807T2245Z/
Cimarron OK-
536 PM CDT Sat Aug 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CIMARRON COUNTY
WILL EXPIRE AT 545 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 gusty
winds are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
the Panhandle of Oklahoma...and the Panhandle of Texas.

LAT...LON 3673 10276 3685 10242 3650 10237 3650 10275
TIME...MOT...LOC 2236Z 259DEG 19KT 3668 10257 

$$

LFM

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 4:26 PM CDT	Special Weather Statement	AMA	Cimarron	34 min
Aug 7, 4:58 PM CDT	Special Weather Statement	AMA	Cimarron	32 min
Aug 7, 5:09 PM CDT	Severe Thunderstorm Warning Considerable damage threat	AMA	Cimarron, Texas	51 min
Aug 7, 6:05 PM CDT	Special Weather Statement	AMA	Texas	25 min
Aug 7, 6:12 PM CDT	Severe Thunderstorm Warning	AMA	Texas	63 min
Aug 7, 6:45 PM CDT	Special Weather Statement	AMA	Texas	30 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.