Alert archive / Texas / Special Weather Statements in 2021

Special Weather Statement, NWS Amarillo, TX

August 21, 2021Oldham County, Texas

NWS Amarillo, TX issued this special weather statement at Aug 21, 2021, 8:21 PM CDT for Oldham County, Texas. It was in force for 54 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, 8:21 PM CDT (01:21 UTC)
Expired
Aug 21, 2021, 9:15 PM CDT
In force
54 min
Issued by
NWS Amarillo, TX
Hail
0.88 in
Wind
55

County Oldham County, TX

The radar

The Amarillo radar (KAMA), 88 km from the middle of the area, began a volume at 01:21 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, 1.4 hours before the alert went out and 88 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-pSkew-T log-p diagram, Amarillo Airport, TX at 00:00Z on 2021-08-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 596 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Amarillo Airport, TX at 00:00Z on 2021-08-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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.

077 
WWUS84 KAMA 220121
SPSAMA

Special Weather Statement
National Weather Service Amarillo TX
821 PM CDT Sat Aug 21 2021
 
TXZ011-220215-
Oldham TX-
821 PM CDT Sat Aug 21 2021

...A strong thunderstorm will impact portions of southwestern Oldham
County through 915 PM CDT...

At 821 PM CDT, Doppler radar was tracking a strong thunderstorm over
Adrian, or 15 miles west of Vega, moving north at 10 mph.

HAZARD...Wind gusts of 50 to 55 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects. Minor damage to outdoor objects is 
         possible.

Locations impacted include...
Adrian.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 3519 10255 3519 10290 3541 10285 3539 10251
TIME...MOT...LOC 0121Z 184DEG 7KT 3526 10271 

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...55 MPH

$$

Guerrero

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 21, 8:38 PM CDTSevere Thunderstorm WarningAMAOldham35 min

Nearby

Special Weather Statements in Texas, 2021Every special weather statement 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.