Alert archive / Texas / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 337, NWS Amarillo, TX

July 11, 2019Hemphill County, Roberts County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Jul 11, 2019, 12:01 AM CDT for Hemphill County, Roberts County, Texas. It was in force for 59 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 11, 2019, 12:01 AM CDT (05:01 UTC)
Expired: Jul 11, 2019, 1:00 AM CDT
In force: 59 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Hemphill County, TX, Roberts County, TX

The radar

The Amarillo radar (KAMA), 125 km from the middle of the area, began a volume at 05:00 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, 5.0 hours before the alert went out and 125 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: 2436 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 1463 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: -134 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 10, 9:08 PM CDT, 2 hours 53 minutes earlier.

Area forecast discussion, Jul 10, 9:08 PM CDT, 2 hours 53 minutes before

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Hazardous weather outlook, Jul 10, 8:04 PM CDT, 3 hours 57 minutes before

Hazardous Weather Outlook
National Weather Service Amarillo TX
804 PM CDT Wed Jul 10 2019

OKZ001>003-TXZ001>020-317-111145-
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-
804 PM CDT Wed Jul 10 2019

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

.DAY ONE...Tonight.

Isolated to scattered thunderstorms are expected across the Oklahoma
and Texas Panhandles. Some storms will have the potential to
become strong to severe, with large hail and damaging winds as the
primary hazards. Locally heavy rainfall is also possible.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Isolated thunderstorms will be possible across far western and
northwestern sections of the Oklahoma and Texas Panhandles during
the evening hours from Thursday through Tuesday. Any storms that
develop are expected to remain below severe levels at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter groups and emergency management personnel across the
Oklahoma and Texas Panhandles should remain alert and be ready for
activation through this evening.

Cockrell

In the hours before

Local storm report, Jul 10, 9:00 PM CDT, 3 hours 1 minute before

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Special weather statement, Jul 10, 9:04 PM CDT, 2 hours 57 minutes before

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Local storm report, Jul 10, 11:17 PM CDT, 44 minutes before

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Local storm report, Jul 10, 11:42 PM CDT, 19 minutes before

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Local storm report, Jul 10, 11:46 PM CDT, 15 minutes before

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Special weather statement, Jul 10, 11:51 PM CDT, 10 minutes 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 10, 7:05 PM CDT	Special Weather Statement	AMA	Moore	25 min
Jul 10, 7:21 PM CDT	Severe Thunderstorm Warning	AMA	Hartley	29 min
Jul 10, 7:27 PM CDT	Severe Thunderstorm Warning	AMA	Hartley, Moore	39 min
Jul 10, 7:29 PM CDT	Special Weather Statement	AMA	Roberts	31 min
Jul 10, 7:39 PM CDT	Severe Thunderstorm Warning	AMA	Gray, Hemphill, Roberts	66 min
Jul 10, 8:10 PM CDT	Special Weather Statement	AMA	Moore	35 min
Jul 10, 8:29 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Gray, Hutchinson, Roberts	61 min
Jul 10, 8:31 PM CDT	Severe Thunderstorm Warning	AMA	Dallam	25 min
Jul 10, 8:33 PM CDT	Special Weather Statement	AMA	Moore	27 min
Jul 10, 9:04 PM CDT	Special Weather Statement	AMA	Roberts	26 min
Jul 10, 9:13 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Hutchinson, Moore	62 min
Jul 10, 9:59 PM CDT	Severe Thunderstorm Warning	AMA	Hansford, Hutchinson	61 min
Jul 10, 10:09 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Potter	30 min
Jul 10, 10:32 PM CDT	Severe Thunderstorm Warning	AMA	Hansford	58 min
Jul 10, 11:32 PM CDT	Severe Thunderstorm Warning	AMA	Ochiltree	43 min
Jul 10, 11:34 PM CDT	Areal Flood Advisory	AMA	Hansford	2 hr
Jul 10, 11:51 PM CDT	Special Weather Statement	AMA	Roberts	24 min
Jul 11, 12:50 AM CDT	Special Weather Statement	AMA	Hemphill, Wheeler	25 min
Jul 11, 1:05 AM CDT	Areal Flood Advisory	AMA	Hemphill, Lipscomb, Ochiltree, Roberts	2 hr
Jul 11, 1:41 AM CDT	Special Weather Statement	AMA	Wheeler	34 min
Jul 11, 2:25 AM CDT	Special Weather Statement	AMA	Collingsworth, Donley	50 min
Jul 11, 2:51 AM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Donley	54 min

Nearby

Severe Thunderstorm Warnings in Texas, 2019 Every severe thunderstorm warning in 2019

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.