Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 232, NWS Amarillo, TX

July 31, 2021Dallam County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Jul 31, 2021, 7:08 PM CDT for Dallam County, Texas. It was in force for 25 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 31, 2021, 7:08 PM CDT (00:08 UTC)
Expired: Jul 31, 2021, 7:33 PM CDT
In force: 25 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Dallam County, TX

The radar

The Amarillo radar (KAMA), 164 km from the middle of the area, began a volume at 00:11 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

Dodge City, (KDDC), launched 00:00Z, 0.1 hours before the alert went out and 309 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: 1535 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 1333 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 85 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

814 
WUUS54 KAMA 010008
SVRAMA
TXC111-010100-
/O.NEW.KAMA.SV.W.0232.210801T0008Z-210801T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
708 PM CDT Sat Jul 31 2021

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  Western Dallam County in the Panhandle of Texas...

* Until 800 PM CDT.

* At 708 PM CDT, a severe thunderstorm was located 9 miles east of
  Texline, or 19 miles east of Clayton, moving west at 15 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Texline and Ware. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3650 10304 3650 10267 3617 10268 3612 10304
TIME...MOT...LOC 0008Z 099DEG 13KT 3634 10285 

HAIL...1.25IN
WIND...60MPH
 
$$

LFM

2 follow-up statements

695 
WWUS54 KAMA 010016
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
716 PM CDT Sat Jul 31 2021

TXC111-010100-
/O.CON.KAMA.SV.W.0232.000000T0000Z-210801T0100Z/
Dallam TX-
716 PM CDT Sat Jul 31 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR WESTERN DALLAM COUNTY...

At 715 PM CDT, a severe thunderstorm was located 7 miles east of
Texline, or 17 miles southeast of Clayton, moving west at 15 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...
Texline.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3650 10304 3650 10275 3616 10274 3612 10304
TIME...MOT...LOC 0015Z 099DEG 13KT 3634 10289 

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

LFM

809 
WWUS54 KAMA 010033
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
733 PM CDT Sat Jul 31 2021

TXC111-010042-
/O.CAN.KAMA.SV.W.0232.000000T0000Z-210801T0100Z/
Dallam TX-
733 PM CDT Sat Jul 31 2021

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN DALLAM COUNTY 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.  However gusty winds and
heavy rain are still possible with this thunderstorm.

LAT...LON 3650 10304 3650 10275 3616 10274 3612 10304
TIME...MOT...LOC 0029Z 099DEG 13KT 3635 10297 

$$

LFM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 7:14 PM CDT	Areal Flood Advisory	AMA	Potter, Randall	3 hr
Jul 31, 8:04 PM CDT	Special Weather Statement	AMA	Carson	26 min
Jul 31, 8:18 PM CDT	Special Weather Statement	AMA	Randall	27 min
Jul 31, 8:57 PM CDT	Special Weather Statement	AMA	Randall	33 min
Jul 31, 10:00 PM CDT	Special Weather Statement	AMA	Gray	30 min
Jul 31, 10:10 PM CDT	Severe Thunderstorm Warning	AMA	Hansford, Ochiltree	65 min
Jul 31, 10:12 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Gray	63 min
Jul 31, 11:05 PM CDT	Special Weather Statement	AMA	Hutchinson, Ochiltree, Roberts	25 min
Jul 31, 11:28 PM CDT	Areal Flood Advisory	AMA	Hansford, Ochiltree	3 hr
Jul 31, 11:44 PM CDT	Special Weather Statement	AMA	Hemphill	46 min
Jul 31, 11:57 PM CDT	Areal Flood Advisory	AMA	Hemphill, Roberts	3 hr
Aug 1, 12:27 AM CDT	Flash Flood Warning	AMA	Hemphill	2 hr
Aug 1, 1:12 AM CDT	Areal Flood Advisory	AMA	Armstrong, Randall	3 hr

Nearby

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.