Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 237, NWS Amarillo, TX

August 7, 2021Deaf Smith County, Oldham County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Aug 7, 2021, 5:35 PM CDT for Deaf Smith County, Oldham County, Texas. It was in force for 40 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 7, 2021, 5:35 PM CDT (22:35 UTC)
Expired
Aug 7, 2021, 6:15 PM CDT
In force
40 min
Issued by
NWS Amarillo, TX
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Deaf Smith County, TX, Oldham County, TX

The radar

The Amarillo radar (KAMA), 74 km from the middle of the area, began a volume at 22:36 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, 10.6 hours before the alert went out and 75 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 2021-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 24 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 2021-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 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
24 J/kg
Mixed-layer CIN
-451 J/kg
Mixed-layer LCL
2679 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

748 
WUUS54 KAMA 072235
SVRAMA
TXC117-359-072315-
/O.NEW.KAMA.SV.W.0237.210807T2235Z-210807T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
535 PM CDT Sat Aug 7 2021

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  Southeastern Oldham County in the Panhandle of Texas...
  Northeastern Deaf Smith County in the Panhandle of Texas...

* Until 615 PM CDT.

* At 535 PM CDT, a severe thunderstorm was located 7 miles southwest
  of Vega, moving east at 25 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...
  Vega, Adrian, Wildorado and Simms. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3496 10275 3529 10274 3545 10217 3495 10217
TIME...MOT...LOC 2235Z 259DEG 23KT 3518 10252 

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

$$

LFM
2 follow-up statements
967 
WWUS54 KAMA 072258
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
558 PM CDT Sat Aug 7 2021

TXC117-359-072315-
/O.CON.KAMA.SV.W.0237.000000T0000Z-210807T2315Z/
Oldham TX-Deaf Smith TX-
558 PM CDT Sat Aug 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CDT
FOR SOUTHEASTERN OLDHAM AND NORTHEASTERN DEAF SMITH COUNTIES...

At 558 PM CDT, a severe thunderstorm was located near Wildorado, or 7
miles east of Vega, moving east at 30 mph.

HAZARD...60 mph wind gusts and nickel size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Vega, Simms and Wildorado. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3545 10217 3495 10217 3496 10271 3538 10242
TIME...MOT...LOC 2258Z 254DEG 26KT 3524 10230 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

LFM
413 
WWUS54 KAMA 072309
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
609 PM CDT Sat Aug 7 2021

TXC117-359-072319-
/O.EXP.KAMA.SV.W.0237.000000T0000Z-210807T2315Z/
Oldham TX-Deaf Smith TX-
609 PM CDT Sat Aug 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN OLDHAM AND
NORTHEASTERN DEAF SMITH COUNTIES WILL EXPIRE AT 615 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 small hail
and gusty winds are still possible with this thunderstorm.

LAT...LON 3545 10217 3495 10217 3496 10271 3538 10242
TIME...MOT...LOC 2309Z 259DEG 23KT 3525 10223 

$$

LFM

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 5:29 PM CDTSpecial Weather StatementAMAOldham31 min
Aug 7, 6:09 PM CDTSpecial Weather StatementAMADeaf Smith36 min
Aug 7, 6:41 PM CDTSpecial Weather StatementAMARandall34 min
Aug 7, 6:47 PM CDTSpecial Weather StatementAMASherman28 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.