Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 138, NWS Amarillo, TX

June 1, 2021Dallam County, Sherman County, Texas; Cimarron County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at Jun 1, 2021, 10:19 PM CDT for Dallam County, Sherman County, Texas; Cimarron County, Oklahoma. It was in force for 71 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: Jun 1, 2021, 10:19 PM CDT (03:19 UTC)
Expired: Jun 1, 2021, 11:30 PM CDT
In force: 71 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

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

The radar

The Amarillo radar (KAMA), 147 km from the middle of the area, began a volume at 03:20 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 nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 3.3 hours before the alert went out and 147 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: 10 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 1359 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 27 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.3

Open this sounding in Storm Lab

The text

As transmitted.

727 
WUUS54 KAMA 020319
SVRAMA
OKC025-TXC111-421-020430-
/O.NEW.KAMA.SV.W.0138.210602T0319Z-210602T0430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
1019 PM CDT Tue Jun 1 2021

The National Weather Service in Amarillo has issued a

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

* Until 1130 PM CDT.

* At 1019 PM CDT, a severe thunderstorm was located 13 miles east of
  Felt, or 15 miles south of Boise City, moving east at 25 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Griggs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3635 10203 3640 10262 3658 10263 3669 10203
TIME...MOT...LOC 0319Z 268DEG 21KT 3651 10255 

HAIL...1.00IN
WIND...<50MPH
 
$$

Ferguson

4 follow-up statements

546 
WWUS54 KAMA 020329
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
1029 PM CDT Tue Jun 1 2021

OKC025-TXC111-421-020430-
/O.CON.KAMA.SV.W.0138.000000T0000Z-210602T0430Z/
Cimarron OK-Sherman TX-Dallam TX-
1029 PM CDT Tue Jun 1 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR SOUTHEASTERN CIMARRON...NORTHWESTERN SHERMAN AND NORTHEASTERN
DALLAM COUNTIES...

At 1029 PM CDT, a severe thunderstorm was located 15 miles south of
Boise City, moving east 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...
Griggs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3635 10203 3640 10262 3658 10263 3669 10203
TIME...MOT...LOC 0329Z 268DEG 21KT 3651 10247 

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

Ferguson

690 
WWUS54 KAMA 020348
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
1048 PM CDT Tue Jun 1 2021

OKC025-TXC111-421-020430-
/O.CON.KAMA.SV.W.0138.000000T0000Z-210602T0430Z/
Cimarron OK-Sherman TX-Dallam TX-
1048 PM CDT Tue Jun 1 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR SOUTHEASTERN CIMARRON...NORTHWESTERN SHERMAN AND NORTHEASTERN
DALLAM COUNTIES...

At 1048 PM CDT, severe thunderstorms were located along a line
extending from 7 miles west of Griggs to 18 miles south of Boise
City, moving east at 35 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...
Griggs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3638 10236 3644 10250 3660 10252 3669 10203
      3635 10203
TIME...MOT...LOC 0348Z 291DEG 31KT 3663 10225 3648 10238 

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

Ferguson

454 
WWUS54 KAMA 020401
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
1101 PM CDT Tue Jun 1 2021

OKC025-TXC111-421-020430-
/O.CON.KAMA.SV.W.0138.000000T0000Z-210602T0430Z/
Cimarron OK-Sherman TX-Dallam TX-
1101 PM CDT Tue Jun 1 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR SOUTHEASTERN CIMARRON...NORTHWESTERN SHERMAN AND NORTHEASTERN
DALLAM COUNTIES...

At 1101 PM CDT, severe thunderstorms were located along a line
extending from Griggs to 11 miles northwest of Stratford, moving
southeast at 40 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...
Griggs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3638 10236 3644 10250 3665 10225 3669 10203
      3635 10203
TIME...MOT...LOC 0401Z 292DEG 36KT 3658 10210 3644 10223 

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

Ferguson

248 
WWUS54 KAMA 020422
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
1122 PM CDT Tue Jun 1 2021

OKC025-TXC111-421-020432-
/O.EXP.KAMA.SV.W.0138.000000T0000Z-210602T0430Z/
Cimarron OK-Sherman TX-Dallam TX-
1122 PM CDT Tue Jun 1 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CIMARRON...
NORTHWESTERN SHERMAN AND NORTHEASTERN DALLAM COUNTIES WILL EXPIRE AT
1130 PM CDT...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.

LAT...LON 3638 10236 3644 10250 3665 10225 3669 10203
      3635 10203
TIME...MOT...LOC 0422Z 268DEG 21KT 3658 10198 3644 10211 

$$

Ferguson

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 1, 9:06 PM CDT	Special Weather Statement	AMA	Dallam	54 min
Jun 1, 10:00 PM CDT	Special Weather Statement	AMA	Dallam	60 min
Jun 1, 11:22 PM CDT	Special Weather Statement	AMA	Sherman	38 min
Jun 1, 11:36 PM CDT	Severe Thunderstorm Warning	AMA	Hartley, Oldham	52 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.