Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 228, NWS Amarillo, TX

July 26, 2021Moore County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Jul 26, 2021, 7:55 PM CDT for Moore County, Texas. It was in force for 28 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: Jul 26, 2021, 7:55 PM CDT (00:55 UTC)
Expired: Jul 26, 2021, 8:23 PM CDT
In force: 28 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Moore County, TX

The radar

The Amarillo radar (KAMA), 90 km from the middle of the area, began a volume at 00:58 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, 0.9 hours before the alert went out and 90 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: 756 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 2002 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

328 
WUUS54 KAMA 270055
SVRAMA
TXC341-270200-
/O.NEW.KAMA.SV.W.0228.210727T0055Z-210727T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
755 PM CDT Mon Jul 26 2021

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  Northwestern Moore County in the Panhandle of Texas...

* Until 900 PM CDT.

* At 754 PM CDT, a severe thunderstorm was located 5 miles south of
  Cactus, or 7 miles north of Dumas, and is nearly stationary.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Dumas and Cactus. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3603 10216 3605 10216 3605 10188 3589 10190
      3587 10211
TIME...MOT...LOC 0054Z 169DEG 2KT 3597 10202 

HAIL...1.00IN
WIND...<50MPH
 
$$

Beat

2 follow-up statements

656 
WWUS54 KAMA 270113
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
813 PM CDT Mon Jul 26 2021

TXC341-270200-
/O.CON.KAMA.SV.W.0228.000000T0000Z-210727T0200Z/
Moore TX-
813 PM CDT Mon Jul 26 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR NORTHWESTERN MOORE COUNTY...

At 813 PM CDT, a severe thunderstorm was located 4 miles south of
Cactus, or 8 miles north of Dumas, and is nearly stationary.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Dumas and Cactus. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3603 10216 3605 10216 3605 10188 3589 10190
      3587 10211
TIME...MOT...LOC 0113Z 169DEG 2KT 3598 10202 

HAIL...<.75IN
WIND...60MPH
 
$$

Beat

146 
WWUS54 KAMA 270123
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
823 PM CDT Mon Jul 26 2021

TXC341-270133-
/O.CAN.KAMA.SV.W.0228.000000T0000Z-210727T0200Z/
Moore TX-
823 PM CDT Mon Jul 26 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MOORE 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.  However heavy rain is
still possible with this thunderstorm.

LAT...LON 3603 10216 3605 10216 3605 10188 3589 10190
      3587 10211
TIME...MOT...LOC 0121Z 169DEG 2KT 3599 10202 

$$

Beat

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 7:08 PM CDT	Special Weather Statement	AMA	Hartley	37 min
Jul 26, 7:43 PM CDT	Special Weather Statement	AMA	Hartley	32 min
Jul 26, 7:46 PM CDT	Special Weather Statement	AMA	Moore	29 min
Jul 26, 8:17 PM CDT	Special Weather Statement	AMA	Moore	28 min
Jul 26, 8:45 PM CDT	Special Weather Statement	AMA	Dallam	30 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.