Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 146, NWS Amarillo, TX

June 12, 2021Dallam County, Sherman County, Texas; Cimarron County, Texas County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at Jun 12, 2021, 10:32 PM CDT for Dallam County, Sherman County, Texas; Cimarron County, Texas County, Oklahoma. It was in force for 58 min. 5 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 12, 2021, 10:32 PM CDT (03:32 UTC)
Expired: Jun 12, 2021, 11:30 PM CDT
In force: 58 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

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

The radar

The Amarillo radar (KAMA), 161 km from the middle of the area, began a volume at 03:35 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.

What was reported inside it

Time	Report	Where	Remark
Jun 12, 10:34 PM CDT	HAIL 1	Boise City, OK
Jun 12, 10:35 PM CDT	TSTM WND GST 75	3 Sse Boise City, OK	MESONET STATION BOIS BOISE CITY REPORT OF COTTONWOOD TREES BEING RIPPED APART IN BOISE CITY.
Jun 12, 10:40 PM CDT	TSTM WND GST 78	3 Sse Boise City, OK	MESONET STATION BOIS BOISE CITY POWER IS OUT IN BOISE CITY.
Jun 12, 11:22 PM CDT	TSTM WND GST 67	4 Wnw Stratford, TX
Jun 12, 11:30 PM CDT	TSTM WND DMG	Griggs, OK	THREE LIMBS SNAPPED AND SHED WAS SHIFTED OFF ITS FOUNDATION AND RELOCATED.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 12, 9:39 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 3.5 hours before the alert went out and 162 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: 3697 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 1361 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 190 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 18.7

Open this sounding in Storm Lab

The text

As transmitted.

216 
WUUS54 KAMA 130332
SVRAMA
OKC025-139-TXC111-421-130430-
/O.NEW.KAMA.SV.W.0146.210613T0332Z-210613T0430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
1032 PM CDT Sat Jun 12 2021

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  Southwestern Texas County in the Panhandle of Oklahoma...
  Southern 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 1032 PM CDT, a severe thunderstorm was located over Boise City,
  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...
  Stratford, Boise City and Griggs. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3669 10284 3681 10223 3636 10179 3619 10258
TIME...MOT...LOC 0332Z 331DEG 35KT 3673 10255 

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

TLH

1 follow-up statement

723 
WWUS54 KAMA 130337
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
1037 PM CDT Sat Jun 12 2021

OKC025-139-TXC111-421-130430-
/O.CON.KAMA.SV.W.0146.000000T0000Z-210613T0430Z/
Texas OK-Cimarron OK-Sherman TX-Dallam TX-
1037 PM CDT Sat Jun 12 2021

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

At 1037 PM CDT, automated weather equipment reported a severe
thunderstorm was located near Boise City, moving southeast at 40 mph.

This is a very dangerous storm.

HAZARD...80 mph wind gusts and quarter size hail.

SOURCE...Automated weather equipment near Boise City measured a wind 
         gust of 75 MPH.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be heavily damaged. Expect 
         considerable damage to roofs, windows, and vehicles. Tree 
         damage and power outages are likely. Hail damage to 
         vehicles is expected.

Locations impacted include...
Stratford, Boise City and Griggs. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3669 10284 3681 10223 3636 10179 3619 10258
TIME...MOT...LOC 0337Z 331DEG 35KT 3668 10252 

HAIL...1.00IN
WIND...80MPH
 
$$

TLH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 12, 10:02 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham	73 min
Jun 12, 10:28 PM CDT	Special Weather Statement	AMA	Dallam	32 min
Jun 12, 11:01 PM CDT	Severe Thunderstorm Warning	AMA	Dallam, Hansford, Hartley, Moore, Sherman	74 min
Jun 12, 11:07 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Hartley, Oldham	83 min
Jun 12, 11:46 PM CDT	Severe Thunderstorm Warning	AMA	Dallam, Hansford, Hartley, Hutchinson, Moore, Oldham and 2 more	59 min
Jun 12, 11:51 PM CDT	Special Weather Statement	AMA	Deaf Smith	24 min
Jun 13, 12:15 AM CDT	Areal Flood Warning	AMA	Dallam, Hartley, Moore, Oldham, Potter, Sherman	2 hr
Jun 13, 12:22 AM CDT	Special Weather Statement	AMA	Randall	23 min
Jun 13, 12:28 AM CDT	Special Weather Statement	AMA	Deaf Smith	32 min
Jun 13, 12:42 AM CDT	Severe Thunderstorm Warning	AMA	Carson, Hansford, Hartley, Hutchinson, Moore, Ochiltree and 4 more	63 min
Jun 13, 1:15 AM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Gray, Hutchinson, Potter, Randall and 1 more	45 min
Jun 13, 1:28 AM CDT	Areal Flood Advisory	AMA	Armstrong, Carson, Hutchinson	2 hr
Jun 13, 1:56 AM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Donley, Gray, Hemphill, Hutchinson and 3 more	64 min
Jun 13, 2:37 AM CDT	Special Weather Statement	AMA	Sherman	23 min
Jun 13, 2:56 AM CDT	Special Weather Statement	AMA	Donley	34 min
Jun 12, 9:24 PM CDT	Special Weather Statement	AMA	Cimarron	36 min
Jun 12, 9:36 PM CDT	Severe Thunderstorm Warning	AMA	Cimarron	69 min
Jun 12, 10:45 PM CDT	Special Weather Statement	AMA	Cimarron	45 min
Jun 12, 11:53 PM CDT	Special Weather Statement	AMA	Texas	52 min
Jun 13, 2:33 AM CDT	Special Weather Statement	AMA	Beaver	27 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.