Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 144, NWS Amarillo, TX

July 13, 2020Dallam County, Texas; Cimarron County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at Jul 13, 2020, 5:39 PM CDT for Dallam County, Texas; Cimarron County, Oklahoma. It was in force for 96 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 13, 2020, 5:39 PM CDT (22:39 UTC)
Expired: Jul 13, 2020, 7:15 PM CDT
In force: 96 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 0.75 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 22:44 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

Amarillo Airport, TX (KAMA), launched 12:00Z, 10.7 hours before the alert went out and 162 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: 428 J/kg
Mixed-layer CIN: -348 J/kg
Mixed-layer LCL: 2496 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 174 m²/s²
0-3 km storm-relative helicity: 259 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jul 13, 3:47 PM CDT, 1 hour 52 minutes earlier.

Area forecast discussion, Jul 13, 3:47 PM CDT, 1 hour 52 minutes before

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Hazardous weather outlook, Jul 13, 4:19 PM CDT, 1 hour 20 minutes before

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In the hours before

Local storm report, Jul 13, 4:43 PM CDT, 56 minutes before

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Special weather statement, Jul 13, 5:12 PM CDT, 27 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
Jul 13, 2:06 AM CDT	Severe Thunderstorm Warning	AMA	Lipscomb	54 min
Jul 13, 3:26 AM CDT	Excessive Heat Warning	AMA	Randall	17 hr
Jul 13, 3:26 AM CDT	Heat Advisory	AMA	Armstrong, Carson, Deaf Smith, Gray, Hansford, Hartley and 8 more	17 hr
Jul 12, 10:34 PM CDT	Special Weather Statement	AMA	Cimarron	56 min
Jul 12, 11:36 PM CDT	Special Weather Statement	AMA	Texas	54 min
Jul 13, 1:25 AM CDT	Special Weather Statement	AMA	Beaver	50 min
Jul 13, 5:12 PM CDT	Special Weather Statement	AMA	Cimarron	63 min

Nearby

Severe Thunderstorm Warnings in Texas, 2020 Severe Thunderstorm Warnings in Oklahoma, 2020 Every severe thunderstorm warning in 2020

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.