Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 189, NWS Amarillo, TX

July 4, 2021Hartley County, Oldham County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Jul 4, 2021, 7:06 PM CDT for Hartley County, Oldham County, Texas. It was in force for 84 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 4, 2021, 7:06 PM CDT (00:06 UTC)
Expired: Jul 4, 2021, 8:30 PM CDT
In force: 84 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

Counties Hartley County, TX, Oldham County, TX

The radar

The Amarillo radar (KAMA), 105 km from the middle of the area, began a volume at 00:05 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.

What was reported inside it

Time	Report	Where	Remark
Jul 4, 7:09 PM CDT	TSTM WND GST 69	11 S Romero, TX	MULTIPLE GUSTS IN EXCESS OF 58 MPH. MAXIMUM GUST OF 69 MPH OCCURRED AT 728 CDT.
Jul 4, 7:56 PM CDT	TSTM WND GST 62	6 Wsw Adrian, TX	MESONET STATION 109 ADRIAN 6WSW.
Jul 4, 8:10 PM CDT	HAIL 1.25	1 Wsw Adrian, TX	QUARTER TO HALF DOLLAR SIZE HAIL.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 4, 3:37 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 0.1 hours before the alert went out and 106 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: 2304 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 1243 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 7.9

Open this sounding in Storm Lab

The text

As transmitted.

023 
WUUS54 KAMA 050006
SVRAMA
TXC205-359-050130-
/O.NEW.KAMA.SV.W.0189.210705T0006Z-210705T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
706 PM CDT Sun Jul 4 2021

The National Weather Service in Amarillo has issued a

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

* Until 830 PM CDT.

* At 705 PM CDT, a severe thunderstorm was located 8 miles southeast
  of Romero, or 16 miles east of Nara Visa, moving southwest at 25
  mph.

  HAZARD...Golf ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to roofs, siding, and trees is possible. 
           People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles.

* Locations impacted include...
  Vega, Adrian and Romero. 

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 3572 10304 3576 10302 3568 10236 3519 10235
      3518 10304
TIME...MOT...LOC 0005Z 023DEG 22KT 3566 10281 

HAIL...1.75IN
WIND...60MPH
 
$$

LG

2 follow-up statements

299 
WWUS54 KAMA 050024
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
724 PM CDT Sun Jul 4 2021

TXC205-359-050130-
/O.CON.KAMA.SV.W.0189.000000T0000Z-210705T0130Z/
Oldham TX-Hartley TX-
724 PM CDT Sun Jul 4 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR OLDHAM AND SOUTHWESTERN HARTLEY COUNTIES...

At 724 PM CDT, a severe thunderstorm was located 16 miles northwest
of Adrian, or 19 miles southeast of Nara Visa, moving south at 30
mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Minor damage to roofs, siding, and trees is possible. 
         People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles.

Locations impacted include...
Vega, Adrian and Romero. 

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 3572 10304 3576 10302 3568 10236 3519 10235
      3518 10304
TIME...MOT...LOC 0024Z 003DEG 28KT 3549 10279 

HAIL...1.75IN
WIND...60MPH
 
$$

LG

276 
WWUS54 KAMA 050048
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
748 PM CDT Sun Jul 4 2021

TXC205-050058-
/O.CAN.KAMA.SV.W.0189.000000T0000Z-210705T0130Z/
Hartley TX-
748 PM CDT Sun Jul 4 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN HARTLEY COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
the Panhandle of Texas.

LAT...LON 3554 10304 3555 10236 3519 10235 3518 10304
TIME...MOT...LOC 0048Z 010DEG 31KT 3529 10284 

$$

TXC359-050130-
/O.CON.KAMA.SV.W.0189.000000T0000Z-210705T0130Z/
Oldham TX-
748 PM CDT Sun Jul 4 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR OLDHAM COUNTY...

At 748 PM CDT, a severe thunderstorm was located 10 miles west of
Adrian, or 23 miles west of Vega, moving south at 35 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Minor damage to roofs, siding, and trees is possible. 
         People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles.

Locations impacted include...
Vega and Adrian. 

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 3554 10304 3555 10236 3519 10235 3518 10304
TIME...MOT...LOC 0048Z 010DEG 31KT 3529 10284 

HAIL...1.75IN
WIND...60MPH
 
$$

LG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 7:31 PM CDT	Severe Thunderstorm Warning	AMA	Dallam	89 min
Jul 4, 7:42 PM CDT	Severe Thunderstorm Warning	AMA	Dallam, Hansford, Sherman	93 min
Jul 4, 7:43 PM CDT	Areal Flood Advisory	AMA	Deaf Smith, Oldham	90 min
Jul 4, 7:52 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham	83 min
Jul 4, 9:00 PM CDT	Severe Thunderstorm Warning	AMA	Dallam	50 min
Jul 4, 9:00 PM CDT	Severe Thunderstorm Warning	AMA	Hartley, Moore, Sherman	60 min
Jul 4, 9:52 PM CDT	Areal Flood Advisory	AMA	Dallam, Hartley	53 min
Jul 4, 10:28 PM CDT	Special Weather Statement	AMA	Oldham	62 min
Jul 4, 10:40 PM CDT	Severe Thunderstorm Warning	AMA	Hartley, Oldham	65 min
Jul 4, 11:05 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham, Potter, Randall	55 min
Jul 4, 11:28 PM CDT	Special Weather Statement	AMA	Deaf Smith	47 min
Jul 4, 11:36 PM CDT	Special Weather Statement	AMA	Gray	24 min
Jul 4, 11:39 PM CDT	Special Weather Statement	AMA	Randall	36 min
Jul 5, 12:01 AM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Donley, Gray	59 min
Jul 5, 12:35 AM CDT	Special Weather Statement	AMA	Gray	25 min
Jul 5, 12:59 AM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson	61 min
Jul 5, 1:31 AM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Potter, Randall	74 min
Jul 5, 2:34 AM CDT	Flash Flood Warning	AMA	Randall	112 min
Jul 5, 2:43 AM CDT	Special Weather Statement	AMA	Randall	47 min
Jul 5, 2:57 AM CDT	Areal Flood Advisory	AMA	Donley	3 hr
Jul 5, 6:38 AM CDT	Areal Flood Advisory	AMA	Collingsworth, Wheeler	3 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.