Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 128, NWS Amarillo, TX

July 4, 2020Hartley County, Oldham County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Jul 4, 2020, 10:14 PM CDT for Hartley County, Oldham County, Texas. It was in force for 61 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 4, 2020, 10:14 PM CDT (03:14 UTC)
Expired: Jul 4, 2020, 11:15 PM CDT
In force: 61 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Hartley County, TX, Oldham County, TX

The radar

The Amarillo radar (KAMA), 92 km from the middle of the area, began a volume at 03:17 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

Albuquerq/Krtlnd, NM (KABQ), launched 00:00Z, 3.2 hours before the alert went out and 368 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: 38 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 3293 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 2 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Amarillo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 4, 6:58 PM CDT, 3 hours 16 minutes earlier.

Area forecast discussion, Jul 4, 6:58 PM CDT, 3 hours 16 minutes before

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Hazardous weather outlook, Jul 4, 1:18 PM CDT, 8 hours 56 minutes before

Hazardous Weather Outlook
National Weather Service Amarillo TX
118 PM CDT Sat Jul 4 2020

OKZ001>003-TXZ001>020-317-050900-
Cimarron-Texas-Beaver-Dallam-Sherman-Hansford-Ochiltree-Lipscomb-
Hartley-Moore-Hutchinson-Roberts-Hemphill-Oldham-Potter-Carson-
Gray-Wheeler-Deaf Smith-Randall-Armstrong-Donley-Collingsworth-
Palo Duro Canyon-
118 PM CDT Sat Jul 4 2020

This Hazardous Weather Outlook is for the Texas and Oklahoma
Panhandles.

.DAY ONE...This Afternoon and Tonight.

Thunderstorms are expected across the Panhandles through tonight.
A few of the storms may become severe with damaging winds and
large hail as the main threats. Heavy rain may cause localized
flooding.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Thunderstorms are possible across the Panhandles Sunday through
Wednesday night. Some of the storms may become severe on Sunday
with large hail and damaging winds the main threats. Heavy rain on
Sunday and Monday may cause localized flooding.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time.

In the hours before

Special weather statement, Jul 4, 4:47 PM CDT, 5 hours 27 minutes before

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Special weather statement, Jul 4, 5:16 PM CDT, 4 hours 58 minutes before

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Special weather statement, Jul 4, 6:44 PM CDT, 3 hours 30 minutes before

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Special weather statement, Jul 4, 6:48 PM CDT, 3 hours 26 minutes before

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Special weather statement, Jul 4, 7:15 PM CDT, 2 hours 59 minutes before

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Special weather statement, Jul 4, 9:14 PM CDT, 1 hour before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 7:15 PM CDT	Special Weather Statement	AMA	Randall	15 min
Jul 4, 9:14 PM CDT	Special Weather Statement	AMA	Hartley	31 min
Jul 4, 9:38 PM CDT	Severe Thunderstorm Warning	AMA	Dallam, Hartley, Oldham	37 min
Jul 4, 10:16 PM CDT	Special Weather Statement	AMA	Dallam	29 min
Jul 4, 11:14 PM CDT	Special Weather Statement	AMA	Hartley, Moore, Oldham, Potter	46 min
Jul 5, 3:24 PM CDT	Special Weather Statement	AMA	Dallam	66 min
Jul 5, 4:47 PM CDT	Special Weather Statement	AMA	Dallam	58 min
Jul 5, 5:55 PM CDT	Areal Flood Advisory	AMA	Hansford, Sherman	2 hr
Jul 5, 6:57 PM CDT	Special Weather Statement	AMA	Deaf Smith	33 min
Jul 5, 3:52 PM CDT	Special Weather Statement	AMA	Beaver	53 min
Jul 5, 5:07 PM CDT	Special Weather Statement	AMA	Beaver	68 min
Jul 5, 5:16 PM CDT	Special Weather Statement	AMA	Texas	59 min
Jul 5, 6:24 PM CDT	Special Weather Statement	AMA	Texas	66 min

Nearby

Severe Thunderstorm Warnings in Texas, 2020 Every severe thunderstorm warning in 2020

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.