Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 253, NWS Amarillo, TX

August 13, 2021Collingsworth County, Wheeler County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Aug 13, 2021, 6:17 PM CDT for Collingsworth County, Wheeler County, Texas. It was in force for 43 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 13, 2021, 6:17 PM CDT (23:17 UTC)
Expired
Aug 13, 2021, 7:00 PM CDT
In force
43 min
Issued by
NWS Amarillo, TX
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Collingsworth County, TX, Wheeler County, TX

The radar

The Altus AFB radar (KFDR), 136 km from the middle of the area, began a volume at 23:17 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, 11.3 hours before the alert went out and 141 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 12:00Z on 2021-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 74 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 12:00Z on 2021-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 square meters per square second.1939Sfc1 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
74 J/kg
Mixed-layer CIN
-104 J/kg
Mixed-layer LCL
1745 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
-27 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted.

418 
WUUS54 KAMA 132317
SVRAMA
TXC087-483-140000-
/O.NEW.KAMA.SV.W.0253.210813T2317Z-210814T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
617 PM CDT Fri Aug 13 2021

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  Southeastern Wheeler County in the Panhandle of Texas...
  Northeastern Collingsworth County in the Panhandle of Texas...

* Until 700 PM CDT.

* At 617 PM CDT, a severe thunderstorm was located near Texola, or 12
  miles east of Shamrock, moving south 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...
  Lutie.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3494 10031 3528 10014 3543 10000 3497 10000
TIME...MOT...LOC 2317Z 359DEG 12KT 3527 10003 

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

$$

MJG
2 follow-up statements
253 
WWUS54 KAMA 132334
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
634 PM CDT Fri Aug 13 2021

TXC087-483-140000-
/O.CON.KAMA.SV.W.0253.000000T0000Z-210814T0000Z/
Wheeler TX-Collingsworth TX-
634 PM CDT Fri Aug 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR SOUTHEASTERN WHEELER AND NORTHEASTERN COLLINGSWORTH COUNTIES...

At 634 PM CDT, a severe thunderstorm was located over Texola, or 12
miles east of Shamrock, moving south at 15 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Lutie.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3494 10031 3521 10014 3534 10000 3497 10000
TIME...MOT...LOC 2334Z 359DEG 12KT 3521 10003 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MJG
045 
WWUS54 KAMA 132359
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
659 PM CDT Fri Aug 13 2021

TXC087-483-140008-
/O.EXP.KAMA.SV.W.0253.000000T0000Z-210814T0000Z/
Wheeler TX-Collingsworth TX-
659 PM CDT Fri Aug 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WHEELER AND
NORTHEASTERN COLLINGSWORTH COUNTIES WILL EXPIRE AT 700 PM CDT...
                
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 will be allowed to expire.  However gusty
winds are still possible with this thunderstorm.

LAT...LON 3494 10031 3521 10014 3534 10000 3497 10000
TIME...MOT...LOC 2358Z 359DEG 12KT 3514 10003 

$$

MJG

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 13, 3:56 PM CDTSpecial Weather StatementAMAArmstrong34 min
Aug 13, 5:37 PM CDTSpecial Weather StatementAMADonley23 min
Aug 13, 5:50 PM CDTSpecial Weather StatementAMAWheeler25 min
Aug 13, 5:52 PM CDTSpecial Weather StatementAMAHemphill23 min

Nearby

Severe Thunderstorm Warnings in Texas, 2021Every 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.