Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 145, NWS Amarillo, TX

July 13, 2020Dallam County, Sherman County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Jul 13, 2020, 7:10 PM CDT for Dallam County, Sherman County, Texas. It was in force for 54 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, 7:10 PM CDT (00:10 UTC)
Expired: Jul 13, 2020, 8:04 PM CDT
In force: 54 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Dallam County, TX, Sherman County, TX

The radar

The Amarillo radar (KAMA), 126 km from the middle of the area, began a volume at 00:14 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

Dodge City, (KDDC), launched 00:00Z, 0.2 hours before the alert went out and 266 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: 2744 J/kg
Mixed-layer CIN: -192 J/kg
Mixed-layer LCL: 1709 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 159 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 Jul 13, 6:50 PM CDT, 20 minutes earlier.

Area forecast discussion, Jul 13, 6:50 PM CDT, 20 minutes before

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Hazardous weather outlook, Jul 13, 4:19 PM CDT, 2 hours 51 minutes before

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In the hours before

Local storm report, Jul 13, 4:43 PM CDT, 2 hours 27 minutes before

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Special weather statement, Jul 13, 5:12 PM CDT, 1 hour 58 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, 7:40 PM CDT	Special Weather Statement	AMA	Moore	35 min
Jul 13, 8:19 PM CDT	Special Weather Statement	AMA	Carson	41 min
Jul 13, 8:23 PM CDT	Special Weather Statement	AMA	Carson	37 min
Jul 13, 8:53 PM CDT	Special Weather Statement	AMA	Hansford	37 min
Jul 14, 3:42 AM CDT	Excessive Heat Warning	AMA	Randall	16 hr
Jul 14, 3:42 AM CDT	Heat Advisory	AMA	Armstrong, Carson, Collingsworth, Deaf Smith, Donley, Gray and 9 more	16 hr
Jul 14, 5:09 PM CDT	Special Weather Statement	AMA	Dallam	36 min
Jul 14, 5:35 PM CDT	Severe Thunderstorm Warning	AMA	Dallam, Sherman	59 min
Jul 14, 6:26 PM CDT	Special Weather Statement	AMA	Dallam	34 min

Nearby

Severe Thunderstorm Warnings in Texas, 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.