Alert archive / Texas / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 108, NWS Amarillo, TX

May 20, 2019Deaf Smith County, Oldham County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at May 20, 2019, 4:14 AM CDT for Deaf Smith 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: May 20, 2019, 4:14 AM CDT (09:14 UTC)
Expired: May 20, 2019, 5:15 AM CDT
In force: 61 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Deaf Smith County, TX, Oldham County, TX

The radar

The Amarillo radar (KAMA), 81 km from the middle of the area, began a volume at 09:17 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 watch it was issued in

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

Issued	Product	Office	Lasted
May 20, 1:57 AM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Midland Regional, TX (KMAF), launched 00:00Z, 9.2 hours before the alert went out and 362 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2484 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 167 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 May 20, 3:01 AM CDT, 1 hour 13 minutes earlier.

Area forecast discussion, May 20, 3:01 AM CDT, 1 hour 13 minutes before

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Hazardous weather outlook, May 20, 3:06 AM CDT, 1 hour 8 minutes before

Hazardous Weather Outlook
National Weather Service Amarillo TX
306 AM CDT Mon May 20 2019

OKZ001>003-TXZ001>020-317-202015-
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-
306 AM CDT Mon May 20 2019

...Severe Thunderstorm Watch in effect until 10 AM CDT...

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

.DAY ONE...Today and Tonight.

Thunderstorms will be ongoing this morning, some of which may be
severe, with hail being the main threat this morning.

Late this morning and afternoon severe weather will become more
widespread and potentially higher end with damaging winds, large
hail, flooding, and tornadoes all possible. These threats could
go into at least parts of the evening hours.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Thunderstorms will be possible Wednesday night through the
weekend. Some of these thunderstorms could be severe.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is likely on Monday.

In the hours before

Special weather statement, May 20, 2:32 AM CDT, 1 hour 42 minutes before

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Special weather statement, May 20, 2:49 AM CDT, 1 hour 25 minutes before

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Special weather statement, May 20, 3:20 AM CDT, 54 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
May 20, 2:32 AM CDT	Special Weather Statement	AMA	Potter	58 min
May 20, 2:49 AM CDT	Special Weather Statement	AMA	Hartley, Oldham	56 min
May 20, 3:20 AM CDT	Special Weather Statement	AMA	Hartley, Sherman	55 min
May 20, 4:18 AM CDT	Special Weather Statement	AMA	Sherman	57 min
May 20, 5:01 AM CDT	Special Weather Statement	AMA	Hansford	59 min
May 20, 5:13 AM CDT	Special Weather Statement	AMA	Sherman	62 min
May 20, 5:27 AM CDT	Areal Flood Advisory	AMA	Hansford, Hartley, Hutchinson, Moore, Sherman	6 hr
May 20, 5:40 AM CDT	Severe Thunderstorm Warning	AMA	Hansford, Ochiltree	53 min
May 20, 5:53 AM CDT	Severe Thunderstorm Warning	AMA	Hansford, Hutchinson, Ochiltree, Roberts	67 min
May 20, 6:29 AM CDT	Special Weather Statement	AMA	Oldham	61 min
May 20, 6:41 AM CDT	Severe Thunderstorm Warning	AMA	Hemphill, Lipscomb, Ochiltree, Roberts	64 min
May 20, 7:04 AM CDT	Special Weather Statement	AMA	Sherman	56 min
May 20, 7:30 AM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Deaf Smith, Oldham, Potter, Randall	45 min
May 20, 7:45 AM CDT	Special Weather Statement	AMA	Moore, Sherman	45 min
May 20, 7:45 AM CDT	Severe Thunderstorm Warning	AMA	Lipscomb	15 min
May 20, 8:10 AM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Hutchinson, Moore, Potter, Randall and 1 more	65 min
May 20, 8:23 AM CDT	Areal Flood Advisory	AMA	Armstrong, Carson, Hutchinson, Moore, Potter, Randall	3 hr
May 20, 8:56 AM CDT	Severe Thunderstorm Warning	AMA	Carson, Hansford, Hutchinson, Moore, Ochiltree, Potter and 1 more	27 min
May 20, 9:28 AM CDT	Flash Flood Warning	AMA	Hansford, Hutchinson, Ochiltree, Roberts	3 hr
May 20, 9:45 AM CDT	Areal Flood Advisory	AMA	Lipscomb, Ochiltree, Roberts	3 hr
May 20, 9:52 AM CDT	Flash Flood Watch	AMA	Armstrong, Carson, Collingsworth, Donley, Gray, Hansford and 6 more	21 hr
May 20, 10:32 AM CDT	Special Weather Statement	AMA	Lipscomb	28 min
May 20, 11:21 AM CDT	Special Weather Statement	AMA	Deaf Smith, Oldham	24 min
May 20, 11:29 AM CDT	Areal Flood Advisory	AMA	Carson, Moore, Potter	3 hr
May 20, 11:44 AM CDT	Special Weather Statement	AMA	Potter	46 min
May 20, 11:50 AM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham	11 min
May 20, 11:59 AM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham	46 min
May 20, 12:14 PM CDT	Severe Thunderstorm Warning	AMA	Hutchinson, Moore, Potter	30 min
May 20, 12:27 PM CDT	Severe Thunderstorm Warning	AMA	Oldham, Potter	32 min
May 20, 12:58 PM CDT	Severe Thunderstorm Warning	AMA	Moore, Potter	47 min
May 20, 1:45 PM CDT	Special Weather Statement	AMA	Hutchinson	30 min
May 20, 1:51 PM CDT	Severe Thunderstorm Warning	AMA	Hansford, Hutchinson, Ochiltree, Roberts	54 min
May 20, 1:53 PM CDT	Special Weather Statement	AMA	Wheeler	37 min
May 20, 2:03 PM CDT	Areal Flood Advisory	AMA	Hansford, Hutchinson, Moore, Sherman	3 hr
May 20, 2:53 PM CDT	Severe Thunderstorm Warning	AMA	Donley, Gray	52 min
May 20, 3:02 PM CDT	Severe Thunderstorm Warning	AMA	Gray, Hemphill, Lipscomb, Ochiltree, Roberts, Wheeler	48 min
May 20, 3:10 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Donley	65 min
May 20, 3:26 PM CDT	Tornado Warning	AMA	Collingsworth	49 min
May 20, 3:28 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Donley	62 min
May 20, 3:33 PM CDT	Tornado Warning	AMA	Collingsworth, Donley	27 min
May 20, 3:35 PM CDT	Severe Thunderstorm Warning	AMA	Gray, Hemphill, Roberts, Wheeler	55 min
May 20, 3:52 PM CDT	Areal Flood Advisory	AMA	Collingsworth, Wheeler	4 hr
May 20, 3:57 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Wheeler	24 min
May 20, 4:22 PM CDT	High Wind Watch	AMA	Deaf Smith, Oldham, Potter, Randall	15 hr
May 20, 4:39 PM CDT	Special Weather Statement	AMA	Donley	36 min
May 20, 5:03 PM CDT	Severe Thunderstorm Warning	AMA	Wheeler	38 min
May 20, 5:03 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth	57 min
May 20, 5:38 PM CDT	Tornado Warning	AMA	Collingsworth	17 min
May 20, 5:47 PM CDT	Dense Fog Advisory	AMA	Dallam, Hansford, Hartley, Hemphill, Hutchinson, Lipscomb and 4 more	12 hr

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.