Alert archive / Texas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 177, NWS Amarillo, TX

June 22, 20184 counties in Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Jun 22, 2018, 5:58 PM CDT for 4 counties in Texas. It was in force for 62 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, 5:58 PM CDT (22:58 UTC)
Expired: Jun 22, 2018, 7:00 PM CDT
In force: 62 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Hartley County, TX, Moore County, TX, Oldham County, TX, Potter County, TX

The radar

The Amarillo radar (KAMA), 65 km from the middle of the area, began a volume at 22:57 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
Jun 22, 3:29 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 11.0 hours before the alert went out and 66 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: 762 J/kg
Mixed-layer CIN: -198 J/kg
Mixed-layer LCL: 1293 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 312 m²/s²
0-3 km storm-relative helicity: 409 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

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, 4:02 PM CDT, 1 hour 56 minutes earlier.

Area forecast discussion, Jun 22, 4:02 PM CDT, 1 hour 56 minutes before

Area Forecast Discussion
National Weather Service Amarillo TX
402 PM CDT Fri Jun 22 2018

.DISCUSSION...
Upper trough tracking east out of the Rockies and across the
Plains states this evening and tonight along with a cold front
pushing south across the Panhandles tonight will allow for
convection development through this evening and into the overnight
hours tonight. Cold front will move south of the forecast area by
Saturday morning or midday and is expected to become stationary
well south of the Panhandles by Saturday afternoon. Surface ridge
will build in behind the front Saturday across the forecast area
allowing for not as warm conditions.

Frontal boundary forecast to lift north and east as a warm front
by Sunday afternoon as a closed upper low tracks east out of the
northern and central Rockies and then into the central Plains
states by Sunday evening. Convection expected to develop once
again across mainly the northern and eastern Panhandles Sunday
afternoon into Sunday night. Upper high to build in over the
southwestern states by Monday night with northwesterly flow aloft
re-establishing itself over the Panhandles. Shortwave trough to
drop southeast out of the central Rockies Monday night with
chances for convection likely again Monday night. Upper high to
build in over the forecast area by the middle and end of next
week.

Schneider

&&

.PRELIMINARY POINT TEMPS/POPS...
Amarillo TX                64  89  67 100  66 /  10   5   5  10  10
Beaver OK                  63  88  68  93  67 /  70   5   5  30  30
Boise City OK              60  88  64  92  60 /  20   5   5  20  20
Borger TX                  64  91  69  99  68 /  20   5   5  20  20
Boys Ranch TX              64  91  68 101  65 /  10   5   5  10  10
Canyon TX                  65  90  67 102  66 /  10   5   5  10  10
Clarendon TX               67  91  69  99  70 /  20   5   5  10  10
Dalhart TX                 63  89  65  94  62 /  20   5   5  10  20
Guymon OK                  62  88  66  94  64 /  30   5   5  30  30
Hereford TX                64  91  67 101  65 /  10   0   5   5  10
Lipscomb TX                64  88  69  96  68 /  60   5   5  20  30
Pampa TX                   63  87  67  96  67 /  30   5   5  20  20
Shamrock TX                67  91  71  99  72 /  30   5   5  10  20
Wellington TX              72  94  73 102  76 /  20   5   5  10  10

&&

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

&&

2/11

Hazardous weather outlook, Jun 22, 3:37 PM CDT, 2 hours 21 minutes before

Hazardous Weather Outlook
National Weather Service Amarillo TX
337 PM CDT Fri Jun 22 2018

OKZ001>003-TXZ001>020-317-231100-
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-
337 PM CDT Fri Jun 22 2018

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

.DAY ONE...This Afternoon and Tonight.

Scattered thunderstorms are expected through tonight. Some storms
through tonight will likely become severe. The main threats will
be hail up to two inches in diameter and gusts of 70 MPH or more.
The potential for tornadoes will also exist this evening. Heavy
rains may occur, possibly leading to localized flooding.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Thunderstorms will be possible across parts of the Panhandles
Sunday afternoon through Monday night. Some of the storms may
become strong to marginally severe with large hail and strong
winds as the main threats.

.SPOTTER INFORMATION STATEMENT...

Emergency Managers and spotter groups need to be ready for
activation through this evening.

Schneider

In the hours before

Special weather statement, Jun 22, 5:31 PM CDT, 27 minutes before

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Local storm report, Jun 22, 5:36 PM CDT, 22 minutes before

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Local storm report, Jun 22, 5:41 PM CDT, 17 minutes before

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Local storm report, Jun 22, 5:43 PM CDT, 15 minutes before

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Special weather statement, Jun 22, 5:45 PM CDT, 13 minutes before

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Special weather statement, Jun 22, 5:48 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
Jun 22, 1:09 AM CDT	Severe Thunderstorm Warning	AMA	Dallam	66 min
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, 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 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.