Alert archive / Texas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 167, NWS Amarillo, TX

June 22, 2018Dallam County, Texas; Cimarron County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at Jun 22, 2018, 1:09 AM CDT for Dallam County, Texas; Cimarron County, Oklahoma. It was in force for 66 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: Jun 22, 2018, 1:09 AM CDT (06:09 UTC)
Expired: Jun 22, 2018, 2:15 AM CDT
In force: 66 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cimarron County, OK, Dallam County, TX

The radar

The Amarillo radar (KAMA), 162 km from the middle of the area, began a volume at 06:12 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

Denver, CO (KDEN), launched 00:00Z, 6.2 hours before the alert went out and 378 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: 435 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 2644 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 144 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

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 Jun 22, 12:20 AM CDT, 49 minutes earlier.

Area forecast discussion, Jun 22, 12:20 AM CDT, 49 minutes before

Area Forecast Discussion
National Weather Service Amarillo TX
1220 AM CDT Fri Jun 22 2018

.AVIATION...
VFR conditions are expected throughout the 06Z TAF period. VCTS
conditions currently at KDHT/KGUY will be expected over the first
one to three hours of the TAF period with the greatest chances at
those TAF sites. Will have to monitor to see if they move south
toward KAMA with amendments that maybe needed. South to
southwesterly winds will pickup in the late morning hours
sustained between 15-20 kts with higher gusts possible.
Thunderstorms are introduced to the forecast once again starting
around 15-16Z, especially at KDHT/KGUY with southeast progression
toward KAMA after 18Z possible. Thunderstorms should clear out as
we go past 00Z towards the end of the TAF period with varying
winds shifts as a low pressure system moves over the region. With
the exception of a thunderstorm passing over a TAF site, cigs
should remain VFR.

Meccariello

&&

.PREV DISCUSSION... /Issued 647 PM CDT Thu Jun 21 2018/

AVIATION...00Z TAFS...
VFR conditions will prevail for the majority of the TAF period.
KAMA and KDHT may see VCTS and -TSRA chances in the next 6 hours
with possible MVFR cig/vis. Storms should only last an hour or two
at the sites and exit southeast. Only going with VCSH for KGUY as
confidence is not high enough for VCTS 6 hours out. It's possible
that the storms will be south of the terminal and may miss KGUY
completely. Will make amendments as necessary. In addition have
gone with a PROB30 group for all sites at 21Z as tomorrows
northwest flow has a chance for storms to quickly move through the
terminals. KAMA may be on the lower end threat, and could be
closer to 23/00z before storms hit, but still making note of the
chance for now. Winds look to be mainly out of the south southwest
10 to 15 kts, with higher gusts. After 18z, expect winds to be in
the 15 to 20 kt range with gusts 25 to 30 kts.

Weber

PREV DISCUSSION... /Issued 318 PM CDT Thu Jun 21 2018/

DISCUSSION...
A northwesterly flow aloft will prevail across the Panhandles
through Friday and Saturday as an upper high builds over the
southwestern states. One shortwave trough will track south and
east across the forecast area this evening and overnight tonight
with a thunderstorm complex pushing across the Panhandles from
northwest to southeast by mid to late evening and through the
overnight hours tonight. Convection expected to linger Friday
morning mainly across the eastern portions of the forecast area.
Another shortwave trough will track mainly over the northern
Panhandles by Friday evening and overnight Friday night bringing
another round of convection to mainly the northern and eastern
portions of the forecast area Friday evening and overnight Friday
night. A cold front is expected to move through the Panhandles
Friday and may become quasi-stationary across the southeastern
Texas Panhandle or just south of the forecast area on Saturday.
The frontal boundary is then forecast to lift northward Sunday as
a warm front before stalling out again early next week across the
Panhandles. Continued chances for convection will be the rule
through early and middle of next week before drier conditions
prevail late next week.

Schneider

&&

.AMA Watches/Warnings/Advisories...
TX...None.
OK...None.

&&

29/3

Hazardous weather outlook, Jun 21, 3:20 PM CDT, 9 hours 49 minutes before

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In the hours before

Special weather statement, Jun 21, 11:36 PM CDT, 1 hour 33 minutes before

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Special weather statement, Jun 22, 1:00 AM CDT, 9 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
Jun 22, 1:36 AM CDT	Special Weather Statement	AMA	Hansford, Ochiltree	39 min
Jun 22, 1:45 AM CDT	Severe Thunderstorm Warning	AMA	Hansford, Ochiltree	60 min
Jun 22, 2:09 AM CDT	Severe Thunderstorm Warning	AMA	Dallam, Hartley	66 min
Jun 22, 2:26 AM CDT	Special Weather Statement	AMA	Dallam	34 min
Jun 22, 2:46 AM CDT	Special Weather Statement	AMA	Lipscomb, Ochiltree	44 min
Jun 22, 2:48 AM CDT	Special Weather Statement	AMA	Hutchinson	42 min
Jun 22, 2:50 AM CDT	Special Weather Statement	AMA	Roberts	40 min
Jun 22, 2:58 AM CDT	Severe Thunderstorm Warning	AMA	Dallam	47 min
Jun 22, 3:07 AM CDT	Special Weather Statement	AMA	Moore	23 min
Jun 22, 3:27 AM CDT	Special Weather Statement	AMA	Hemphill, Lipscomb	63 min
Jun 22, 3:31 AM CDT	Special Weather Statement	AMA	Hutchinson, Roberts	44 min
Jun 22, 3:32 AM CDT	Special Weather Statement	AMA	Moore	28 min
Jun 22, 3:42 AM CDT	Special Weather Statement	AMA	Dallam	33 min
Jun 22, 3:47 AM CDT	Severe Thunderstorm Warning	AMA	Hemphill, Roberts	33 min
Jun 22, 4:23 AM CDT	Special Weather Statement	AMA	Carson, Collingsworth, Donley, Gray, Hemphill, Hutchinson and 2 more	82 min
Jun 22, 4:40 PM CDT	Special Weather Statement	AMA	Dallam	35 min
Jun 22, 4:58 PM CDT	Special Weather Statement	AMA	Hartley	32 min
Jun 22, 5:13 PM CDT	Special Weather Statement	AMA	Dallam	32 min
Jun 22, 5:25 PM CDT	Special Weather Statement	AMA	Sherman	35 min
Jun 22, 5:28 PM CDT	Special Weather Statement	AMA	Oldham	32 min
Jun 22, 5:31 PM CDT	Special Weather Statement	AMA	Moore	29 min
Jun 22, 5:36 PM CDT	Severe Thunderstorm Warning	AMA	Dallam, Hansford, Sherman	54 min
Jun 22, 5:45 PM CDT	Special Weather Statement	AMA	Dallam	15 min
Jun 22, 5:48 PM CDT	Special Weather Statement	AMA	Oldham	27 min
Jun 22, 5:55 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Dallam, Hansford, Hartley, Hutchinson, Moore and 1 more	65 min
Jun 22, 5:58 PM CDT	Severe Thunderstorm Warning	AMA	Hartley, Moore, Oldham, Potter	62 min
Jun 22, 6:05 PM CDT	Areal Flood Advisory	AMA	Sherman	42 min
Jun 22, 6:29 PM CDT	Severe Thunderstorm Warning	AMA	Hansford, Sherman	20 min
Jun 22, 6:31 PM CDT	Special Weather Statement	AMA	Sherman	29 min
Jun 22, 6:57 PM CDT	Severe Thunderstorm Warning	AMA	Hansford, Hutchinson	34 min
Jun 22, 6:58 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Potter	62 min
Jun 21, 11:36 PM CDT	Special Weather Statement	AMA	Texas	24 min
Jun 22, 1:00 AM CDT	Special Weather Statement	AMA	Cimarron	45 min
Jun 22, 8:07 AM CDT	Special Weather Statement	AMA	Beaver	23 min
Jun 22, 8:31 AM CDT	Special Weather Statement	AMA	Beaver	29 min
Jun 22, 4:07 PM CDT	Special Weather Statement	AMA	Cimarron	23 min
Jun 22, 4:19 PM CDT	Severe Thunderstorm Warning	AMA	Cimarron	56 min
Jun 22, 4:30 PM CDT	Special Weather Statement	AMA	Cimarron	15 min
Jun 22, 4:45 PM CDT	Special Weather Statement	AMA	Cimarron	30 min
Jun 22, 4:57 PM CDT	Tornado Warning	AMA	Cimarron	48 min
Jun 22, 5:15 PM CDT	Severe Thunderstorm Warning	AMA	Cimarron, Texas	60 min
Jun 22, 5:40 PM CDT	Severe Thunderstorm Warning	AMA	Texas	65 min
Jun 22, 6:26 PM CDT	Special Weather Statement	AMA	Texas	34 min
Jun 22, 6:29 PM CDT	Special Weather Statement	AMA	Cimarron	31 min
Jun 22, 6:40 PM CDT	Severe Thunderstorm Warning	AMA	Beaver, Texas	65 min
Jun 22, 6:58 PM CDT	Special Weather Statement	AMA	Texas	32 min

Nearby

Severe Thunderstorm Warnings in Texas, 2018 Severe Thunderstorm Warnings in Oklahoma, 2018 Every severe thunderstorm warning in 2018

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.