Alert archive / Texas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 222, NWS Amarillo, TX

July 28, 2018Lipscomb County, Ochiltree County, Texas; Beaver County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at Jul 28, 2018, 12:00 AM CDT for Lipscomb County, Ochiltree County, Texas; Beaver County, Oklahoma. It was in force for 75 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: Jul 28, 2018, 12:00 AM CDT (05:00 UTC)
Expired: Jul 28, 2018, 1:15 AM CDT
In force: 75 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Beaver County, OK, Lipscomb County, TX, Ochiltree County, TX

The radar

The Dodge City radar (KDDC), 155 km from the middle of the area, began a volume at 05:01 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
Jul 27, 10:17 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 5.0 hours before the alert went out and 158 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: 948 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 1548 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 3.5

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 Jul 27, 10:23 PM CDT, 1 hour 37 minutes earlier.

Area forecast discussion, Jul 27, 10:23 PM CDT, 1 hour 37 minutes before

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In the hours before

Special weather statement, Jul 27, 7:51 PM CDT, 4 hours 9 minutes before

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Special weather statement, Jul 27, 9:47 PM CDT, 2 hours 13 minutes before

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Special weather statement, Jul 27, 10:40 PM CDT, 1 hour 20 minutes before

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Special weather statement, Jul 27, 11:12 PM CDT, 48 minutes before

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Special weather statement, Jul 27, 11:43 PM CDT, 17 minutes before

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      <p id="message2">
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The office that day

Everything else NWS Amarillo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 28, 2:03 AM CDT	Special Weather Statement	AMA	Hutchinson	57 min
Jul 27, 7:51 PM CDT	Special Weather Statement	AMA	Cimarron	54 min
Jul 27, 9:47 PM CDT	Special Weather Statement	AMA	Texas	28 min
Jul 27, 10:11 PM CDT	Severe Thunderstorm Warning	AMA	Texas	49 min
Jul 27, 10:40 PM CDT	Special Weather Statement	AMA	Texas	35 min
Jul 27, 11:12 PM CDT	Special Weather Statement	AMA	Beaver	33 min
Jul 27, 11:43 PM CDT	Special Weather Statement	AMA	Beaver	47 min
Jul 28, 12:31 AM CDT	Areal Flood Advisory	AMA	Beaver	115 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.