Alert archive / Texas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 234, NWS Amarillo, TX

August 8, 2018Deaf Smith County, Potter County, Randall County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Aug 8, 2018, 1:39 AM CDT for Deaf Smith County, Potter County, Randall County, Texas. It was in force for 66 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: Aug 8, 2018, 1:39 AM CDT (06:39 UTC)
Expired: Aug 8, 2018, 2:45 AM CDT
In force: 66 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Deaf Smith County, TX, Potter County, TX, Randall County, TX

The radar

The Amarillo radar (KAMA), 41 km from the middle of the area, began a volume at 06:40 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 00:00Z, 6.7 hours before the alert went out and 41 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: 230 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 2835 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 Aug 8, 12:37 AM CDT, 1 hour 2 minutes earlier.

Area forecast discussion, Aug 8, 12:37 AM CDT, 1 hour 2 minutes before

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Hazardous weather outlook, Aug 7, 10:52 PM CDT, 2 hours 47 minutes before

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In the hours before

Special weather statement, Aug 8, 12:48 AM CDT, 51 minutes before

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Special weather statement, Aug 8, 1:22 AM CDT, 17 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
Aug 8, 12:48 AM CDT	Special Weather Statement	AMA	Deaf Smith, Oldham	42 min
Aug 8, 1:22 AM CDT	Special Weather Statement	AMA	Deaf Smith, Randall	53 min
Aug 8, 3:41 AM CDT	Special Weather Statement	AMA	Carson	34 min
Aug 8, 4:01 AM CDT	Areal Flood Advisory	AMA	Oldham	119 min
Aug 8, 4:48 AM CDT	Special Weather Statement	AMA	Lipscomb	27 min
Aug 8, 6:48 PM CDT	Special Weather Statement	AMA	Sherman	27 min
Aug 8, 4:04 AM CDT	Special Weather Statement	AMA	Beaver	41 min
Aug 8, 4:38 PM CDT	Special Weather Statement	AMA	Cimarron	37 min
Aug 8, 4:55 PM CDT	Severe Thunderstorm Warning	AMA	Cimarron	65 min
Aug 8, 5:05 PM CDT	Severe Thunderstorm Warning	AMA	Cimarron, Texas	40 min

Nearby

Severe Thunderstorm Warnings in Texas, 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.