Alert archive / Texas / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 17, NWS Amarillo, TX

April 12, 2015Collingsworth County, Donley County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Apr 12, 2015, 6:58 PM CDT for Collingsworth County, Donley County, 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: Apr 12, 2015, 6:58 PM CDT (23:58 UTC)
Expired: Apr 12, 2015, 8:00 PM CDT
In force: 62 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.5 in
Wind: 50.0 mph

Counties Collingsworth County, TX, Donley County, TX

The radar

The Amarillo radar (KAMA), 110 km from the middle of the area, began a volume at 00:00 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 watch it was issued in

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

Issued	Product	Office	Lasted
Apr 12, 5:17 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Dodge City, (KDDC), launched 12:00Z, 12.0 hours before the alert went out and 317 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: 905 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 488 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 365 m²/s²
0-3 km storm-relative helicity: 363 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.4

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 Apr 12, 6:34 PM CDT, 24 minutes earlier.

Area forecast discussion, Apr 12, 6:34 PM CDT, 24 minutes before

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Hazardous weather outlook, Apr 12, 5:29 PM CDT, 1 hour 29 minutes before

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In the hours before

Local storm report, Apr 12, 5:44 PM CDT, 1 hour 14 minutes before

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Special weather statement, Apr 12, 6:38 PM CDT, 20 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
Apr 11, 7:17 PM CDT	Tornado Warning	AMA	Carson, Gray	43 min
Apr 11, 7:30 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Gray, Hutchinson, Roberts	60 min
Apr 11, 7:37 PM CDT	Special Weather Statement	AMA	Hutchinson	23 min
Apr 11, 7:57 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Gray, Hutchinson, Roberts	11 min
Apr 11, 8:07 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Gray	23 min
Apr 11, 8:26 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Gray, Hemphill, Wheeler	64 min
Apr 11, 9:28 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Wheeler	32 min
Apr 11, 11:16 PM CDT	Special Weather Statement	AMA	Lipscomb	44 min
Apr 11, 11:21 PM CDT	Severe Thunderstorm Warning	AMA	Hemphill, Lipscomb	27 min
Apr 12, 5:31 PM CDT	Severe Thunderstorm Warning	AMA	Hemphill, Wheeler	59 min
Apr 12, 5:54 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Donley	66 min
Apr 12, 6:38 PM CDT	Special Weather Statement	AMA	Wheeler	67 min

Nearby

Severe Thunderstorm Warnings in Texas, 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.