Alert archive / Texas / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 121, NWS Amarillo, TX

May 28, 2015Dallam County, Hartley County, Texas; Cimarron County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at May 28, 2015, 5:26 PM CDT for Dallam County, Hartley County, Texas; Cimarron County, Oklahoma. It was in force for 64 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 28, 2015, 5:26 PM CDT (22:26 UTC)
Expired: May 28, 2015, 6:30 PM CDT
In force: 64 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Cimarron County, OK, Dallam County, TX, Hartley County, TX

The radar

The Amarillo radar (KAMA), 141 km from the middle of the area, began a volume at 22:29 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 28, 2:18 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 10.4 hours before the alert went out and 142 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: 1281 J/kg
Mixed-layer CIN: -203 J/kg
Mixed-layer LCL: 1037 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 262 m²/s²
0-3 km storm-relative helicity: 283 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

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 May 28, 12:21 PM CDT, 5 hours 5 minutes earlier.

Area forecast discussion, May 28, 12:21 PM CDT, 5 hours 5 minutes before

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Hazardous weather outlook, May 28, 3:48 PM CDT, 1 hour 38 minutes before

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In the hours before

Local storm report, May 28, 12:00 PM CDT, 5 hours 26 minutes before

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Local storm report, May 28, 12:30 PM CDT, 4 hours 56 minutes before

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Special weather statement, May 28, 4:10 PM CDT, 1 hour 16 minutes before

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Special weather statement, May 28, 5:15 PM CDT, 11 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 27, 7:15 PM CDT	Severe Thunderstorm Warning	AMA	Hemphill, Ochiltree, Roberts	30 min
May 27, 7:39 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	66 min
May 27, 8:18 PM CDT	Tornado Warning	AMA	Armstrong	57 min
May 27, 8:29 PM CDT	Flash Flood Warning	AMA	Armstrong	3 hr
May 27, 9:14 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong	61 min
May 27, 9:51 PM CDT	Tornado Warning	AMA	Randall	24 min
May 27, 9:58 PM CDT	Flash Flood Warning	AMA	Hemphill, Lipscomb	6 hr
May 27, 10:08 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Donley	67 min
May 27, 10:11 PM CDT	Severe Thunderstorm Warning	AMA	Randall	64 min
May 27, 10:29 PM CDT	Flash Flood Warning	AMA	Armstrong, Randall	6 hr
May 27, 10:41 PM CDT	River Flood Warning	AMA	Armstrong	18 hr
May 27, 11:02 PM CDT	Severe Thunderstorm Warning	AMA	Randall	43 min
May 27, 11:08 PM CDT	Flash Flood Warning	AMA	Collingsworth	3 hr
May 27, 11:14 PM CDT	Severe Thunderstorm Warning	AMA	Donley	61 min
May 27, 11:32 PM CDT	Severe Thunderstorm Warning	AMA	Randall	33 min
May 28, 12:03 AM CDT	Flash Flood Warning	AMA	Donley	4 hr
May 28, 12:07 AM CDT	Special Weather Statement	AMA	Randall	23 min
May 28, 1:12 AM CDT	Special Weather Statement	AMA	Randall	33 min
May 28, 1:13 AM CDT	River Flood Warning	AMA	Hemphill	19 hr
May 28, 1:45 AM CDT	Areal Flood Advisory	AMA	Collingsworth	4 hr
May 28, 1:52 AM CDT	Special Weather Statement	AMA	Randall	38 min
May 28, 2:02 AM CDT	Severe Thunderstorm Warning	AMA	Randall	43 min
May 28, 4:04 AM CDT	Flash Flood Watch	AMA	Armstrong, Carson, Collingsworth, Deaf Smith, Donley, Gray and 8 more	17 hr
May 28, 9:27 AM CDT	Special Weather Statement	AMA	Ochiltree	33 min
May 28, 4:10 PM CDT	Special Weather Statement	AMA	Dallam	50 min
May 28, 4:26 PM CDT	Severe Thunderstorm Warning	AMA	Dallam	64 min
May 28, 5:15 PM CDT	Special Weather Statement	AMA	Oldham	45 min
May 28, 6:32 PM CDT	Severe Thunderstorm Warning	AMA	Dallam, Hartley	58 min
May 28, 6:36 PM CDT	Special Weather Statement	AMA	Sherman	39 min
May 27, 9:44 PM CDT	Areal Flood Advisory	AMA	Beaver	4 hr
May 28, 8:41 AM CDT	Special Weather Statement	AMA	Cimarron	49 min

Nearby

Severe Thunderstorm Warnings in Texas, 2015 Severe Thunderstorm Warnings in Oklahoma, 2015 Every severe thunderstorm warning in 2015

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.