Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 266, NWS Amarillo, TX

August 21, 2021Oldham County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Aug 21, 2021, 8:38 PM CDT for Oldham County, Texas. It was in force for 35 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: Aug 21, 2021, 8:38 PM CDT (01:38 UTC)
Expired: Aug 21, 2021, 9:13 PM CDT
In force: 35 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Oldham County, TX

The radar

The Amarillo radar (KAMA), 88 km from the middle of the area, began a volume at 01:41 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, 1.6 hours before the alert went out and 89 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: 596 J/kg
Mixed-layer CIN: -146 J/kg
Mixed-layer LCL: 1329 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 47 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

111 
WUUS54 KAMA 220138
SVRAMA
TXC359-220245-
/O.NEW.KAMA.SV.W.0266.210822T0138Z-210822T0245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
838 PM CDT Sat Aug 21 2021

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  South central Oldham County in the Panhandle of Texas...

* Until 945 PM CDT.

* At 837 PM CDT, a severe thunderstorm was located over Adrian, or 14
  miles west of Vega, moving northeast at 5 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...
  Adrian.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3522 10262 3523 10281 3539 10283 3536 10251
TIME...MOT...LOC 0137Z 203DEG 5KT 3527 10268 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Guerrero

1 follow-up statement

293 
WWUS54 KAMA 220213
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
913 PM CDT Sat Aug 21 2021

TXC359-220222-
/O.CAN.KAMA.SV.W.0266.000000T0000Z-210822T0245Z/
Oldham TX-
913 PM CDT Sat Aug 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL OLDHAM 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.

LAT...LON 3522 10262 3523 10281 3539 10283 3536 10251
TIME...MOT...LOC 0211Z 203DEG 5KT 3532 10266 

$$

Guerrero

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 21, 8:21 PM CDT	Special Weather Statement	AMA	Oldham	54 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.