Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 271, NWS Amarillo, TX

September 14, 2021Hartley County, Oldham County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Sep 14, 2021, 10:17 PM CDT for Hartley County, Oldham County, Texas. It was in force for 58 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: Sep 14, 2021, 10:17 PM CDT (03:17 UTC)
Expired: Sep 14, 2021, 11:15 PM CDT
In force: 58 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Hartley County, TX, Oldham County, TX

The radar

The Amarillo radar (KAMA), 114 km from the middle of the area, began a volume at 03:18 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, 3.3 hours before the alert went out and 115 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: 183 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 2515 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: -21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

540 
WUUS54 KAMA 150317
SVRAMA
TXC205-359-150415-
/O.NEW.KAMA.SV.W.0271.210915T0317Z-210915T0415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
1017 PM CDT Tue Sep 14 2021

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  Northwestern Oldham County in the Panhandle of Texas...
  Southwestern Hartley County in the Panhandle of Texas...

* Until 1115 PM CDT.

* At 1017 PM CDT, a severe thunderstorm was located 6 miles east of
  Nara Visa, moving east at 20 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
  northwestern Oldham and southwestern Hartley Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3572 10304 3571 10257 3543 10265 3554 10304
TIME...MOT...LOC 0317Z 278DEG 17KT 3562 10299 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Rutt

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 14, 10:14 PM CDT	Special Weather Statement	AMA	Sherman	31 min
Sep 14, 10:38 PM CDT	Special Weather Statement	AMA	Hartley	37 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.