Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 229, NWS Amarillo, TX

July 31, 2021Roberts County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Jul 31, 2021, 4:37 PM CDT for Roberts County, Texas. It was in force for 23 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, 4:37 PM CDT (21:37 UTC)
Expired: Jul 31, 2021, 5:00 PM CDT
In force: 23 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Roberts County, TX

The radar

The Amarillo radar (KAMA), 123 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 nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 9.6 hours before the alert went out and 123 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: 387 J/kg
Mixed-layer CIN: -124 J/kg
Mixed-layer LCL: 1831 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 38 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

612 
WUUS54 KAMA 312137
SVRAMA
TXC393-312200-
/O.NEW.KAMA.SV.W.0229.210731T2137Z-210731T2200Z/

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

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  Northeastern Roberts County in the Panhandle of Texas...

* Until 500 PM CDT.

* At 436 PM CDT, a severe thunderstorm was located 17 miles northwest
  of Miami, moving northeast at 5 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.

* This severe thunderstorm will remain over mainly rural areas of
  northeastern Roberts County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3585 10054 3581 10081 3599 10092 3605 10077
      3606 10058 3606 10054
TIME...MOT...LOC 2136Z 237DEG 5KT 3591 10079 

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

LFM

1 follow-up statement

152 
WWUS54 KAMA 312147
SVSAMA

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

TXC393-312200-
/O.CON.KAMA.SV.W.0229.000000T0000Z-210731T2200Z/
Roberts TX-
447 PM CDT Sat Jul 31 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR NORTHEASTERN ROBERTS COUNTY...

At 447 PM CDT, a severe thunderstorm was located 17 miles northwest
of Lora, or 17 miles northwest of Miami, moving northeast at 5 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.

This severe thunderstorm will remain over mainly rural areas of
northeastern Roberts County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3584 10062 3581 10081 3599 10092 3605 10077
      3605 10073 3599 10069 3593 10066
TIME...MOT...LOC 2147Z 237DEG 5KT 3592 10077 

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

LFM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 4:27 PM CDT	Special Weather Statement	AMA	Roberts	33 min
Jul 31, 4:53 PM CDT	Areal Flood Advisory	AMA	Roberts	3 hr
Jul 31, 4:59 PM CDT	Severe Thunderstorm Warning	AMA	Roberts	31 min
Jul 31, 5:26 PM CDT	Special Weather Statement	AMA	Hemphill	34 min
Jul 31, 5:43 PM CDT	Special Weather Statement	AMA	Dallam	32 min
Jul 31, 6:04 PM CDT	Special Weather Statement	AMA	Potter	26 min
Jul 31, 6:08 PM CDT	Special Weather Statement	AMA	Hutchinson	37 min
Jul 31, 6:21 PM CDT	Special Weather Statement	AMA	Dallam	24 min
Jul 31, 6:29 PM CDT	Special Weather Statement	AMA	Potter	31 min
Jul 31, 6:46 PM CDT	Areal Flood Advisory	AMA	Potter	3 hr
Jul 31, 6:54 PM CDT	Severe Thunderstorm Warning	AMA	Potter, Randall	51 min

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.