Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 206, NWS Amarillo, TX

July 17, 2021Texas County, Oklahoma; Hansford County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Jul 17, 2021, 5:45 AM CDT for Texas County, Oklahoma; Hansford County, Texas. It was in force for 30 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: Jul 17, 2021, 5:45 AM CDT (10:45 UTC)
Expired: Jul 17, 2021, 6:15 AM CDT
In force: 30 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Texas County, OK, Hansford County, TX

The radar

The Amarillo radar (KAMA), 141 km from the middle of the area, began a volume at 10:47 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, 10.8 hours before the alert went out and 141 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: 1114 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 1778 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 75 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

As transmitted.

178 
WUUS54 KAMA 171045
SVRAMA
OKC139-TXC195-171115-
/O.NEW.KAMA.SV.W.0206.210717T1045Z-210717T1115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
545 AM CDT Sat Jul 17 2021

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  Southeastern Texas County in the Panhandle of Oklahoma...
  Northeastern Hansford County in the Panhandle of Texas...

* Until 615 AM CDT.

* At 544 AM CDT, a severe thunderstorm was located 12 miles south of
  Guymon, moving east at 10 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...
  Hardesty.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3637 10149 3660 10150 3667 10115 3631 10112
TIME...MOT...LOC 1044Z 267DEG 9KT 3652 10139 

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

LFM

1 follow-up statement

245 
WWUS54 KAMA 171104
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
604 AM CDT Sat Jul 17 2021

OKC139-TXC195-171115-
/O.CON.KAMA.SV.W.0206.000000T0000Z-210717T1115Z/
Texas OK-Hansford TX-
604 AM CDT Sat Jul 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 AM CDT
FOR SOUTHEASTERN TEXAS AND NORTHEASTERN HANSFORD COUNTIES...

At 604 AM CDT, a severe thunderstorm was located 9 miles southwest of
Hardesty, or 14 miles southeast of Guymon, moving east at 10 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Hardesty.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3641 10149 3650 10150 3657 10150 3667 10115
      3631 10112
TIME...MOT...LOC 1104Z 267DEG 9KT 3652 10133 

HAIL...<.75IN
WIND...60MPH
 
$$

LFM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 3:29 AM CDT	Special Weather Statement	AMA	Texas	16 min
Jul 17, 5:57 AM CDT	Areal Flood Advisory	AMA	Texas	2 hr
Jul 17, 9:05 AM CDT	Special Weather Statement	AMA	Texas	55 min
Jul 17, 1:41 PM CDT	Special Weather Statement	AMA	Cimarron	64 min
Jul 17, 2:40 PM CDT	Areal Flood Advisory	AMA	Cimarron	2 hr
Jul 17, 3:35 PM CDT	Special Weather Statement	AMA	Texas	55 min
Jul 17, 3:45 PM CDT	Severe Thunderstorm Warning	AMA	Texas	60 min
Jul 17, 4:02 PM CDT	Severe Thunderstorm Warning	AMA	Texas	34 min
Jul 16, 7:47 PM CDT	Special Weather Statement	AMA	Oldham	28 min
Jul 16, 8:02 PM CDT	Severe Thunderstorm Warning	AMA	Hartley	24 min
Jul 16, 8:24 PM CDT	Special Weather Statement	AMA	Oldham	36 min
Jul 16, 8:26 PM CDT	Special Weather Statement	AMA	Hutchinson	34 min
Jul 17, 4:58 AM CDT	Special Weather Statement	AMA	Hansford	32 min
Jul 17, 5:33 AM CDT	Special Weather Statement	AMA	Hansford	27 min
Jul 17, 6:14 AM CDT	Special Weather Statement	AMA	Hansford	31 min
Jul 17, 2:30 PM CDT	Special Weather Statement	AMA	Sherman	60 min
Jul 17, 2:50 PM CDT	Special Weather Statement	AMA	Dallam	55 min
Jul 17, 3:00 PM CDT	Severe Thunderstorm Warning	AMA	Dallam	60 min
Jul 17, 3:27 PM CDT	Special Weather Statement	AMA	Moore	63 min
Jul 17, 3:40 PM CDT	Special Weather Statement	AMA	Gray	65 min
Jul 17, 3:48 PM CDT	Severe Thunderstorm Warning	AMA	Gray	57 min
Jul 17, 3:55 PM CDT	Areal Flood Advisory	AMA	Dallam, Hartley	105 min
Jul 17, 3:59 PM CDT	Special Weather Statement	AMA	Sherman	61 min
Jul 17, 4:46 PM CDT	Special Weather Statement	AMA	Wheeler	59 min
Jul 17, 4:52 PM CDT	Special Weather Statement	AMA	Armstrong	53 min
Jul 17, 4:56 PM CDT	Flash Flood Warning	AMA	Armstrong	98 min
Jul 17, 5:00 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong	43 min
Jul 17, 5:38 PM CDT	Special Weather Statement	AMA	Donley	37 min
Jul 17, 6:01 PM CDT	Severe Thunderstorm Warning	AMA	Donley	24 min
Jul 17, 6:23 PM CDT	Areal Flood Advisory	AMA	Potter, Randall	3 hr
Jul 17, 6:27 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	63 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.