Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 203, NWS Amarillo, TX

July 15, 2021Hartley County, Oldham County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Jul 15, 2021, 5:21 PM CDT for Hartley County, 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: Jul 15, 2021, 5:21 PM CDT (22:21 UTC)
Expired: Jul 15, 2021, 6:15 PM CDT
In force: 54 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), 79 km from the middle of the area, began a volume at 22:22 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, 10.4 hours before the alert went out and 80 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: 131 J/kg
Mixed-layer CIN: -177 J/kg
Mixed-layer LCL: 1440 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

749 
WUUS54 KAMA 152221
SVRAMA
TXC205-359-152315-
/O.NEW.KAMA.SV.W.0203.210715T2221Z-210715T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
521 PM CDT Thu Jul 15 2021

The National Weather Service in Amarillo has issued a

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

* Until 615 PM CDT.

* At 521 PM CDT, a severe thunderstorm was located 4 miles northwest
  of Channing, or 24 miles south of Dalhart, and is nearly
  stationary.

  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. Hail may accumulate 
           on roadways causing hazardous travel.

* Locations impacted include...
  Channing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3581 10251 3584 10216 3566 10216 3551 10221
      3565 10259
TIME...MOT...LOC 2221Z 284DEG 2KT 3571 10241 

HAIL...1.00IN
WIND...60MPH
 
$$

Rutt

1 follow-up statement

142 
WWUS54 KAMA 152312
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
612 PM CDT Thu Jul 15 2021

TXC205-359-152322-
/O.EXP.KAMA.SV.W.0203.000000T0000Z-210715T2315Z/
Oldham TX-Hartley TX-
612 PM CDT Thu Jul 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN OLDHAM AND
SOUTHEASTERN HARTLEY 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, gusty winds and heavy rain are still possible with this
thunderstorm.

LAT...LON 3581 10251 3584 10216 3566 10216 3551 10221
      3565 10259
TIME...MOT...LOC 2312Z 284DEG 2KT 3570 10238 

$$

Rutt

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 7:22 PM CDT	Special Weather Statement	AMA	Dallam, Hartley	23 min
Jul 14, 7:48 PM CDT	Special Weather Statement	AMA	Hartley	27 min
Jul 14, 9:02 PM CDT	Special Weather Statement	AMA	Oldham	28 min
Jul 14, 9:30 PM CDT	Special Weather Statement	AMA	Potter	30 min
Jul 15, 4:09 PM CDT	Special Weather Statement	AMA	Oldham	21 min
Jul 15, 5:03 PM CDT	Special Weather Statement	AMA	Hartley	27 min
Jul 15, 5:36 PM CDT	Areal Flood Advisory	AMA	Hartley	3 hr
Jul 15, 6:12 PM CDT	Special Weather Statement	AMA	Hartley	33 min
Jul 15, 6:39 PM CDT	Special Weather Statement	AMA	Moore	36 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.