Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 206, NWS Amarillo, TX

August 29, 2020Dallam County, Texas; Cimarron County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at Aug 29, 2020, 5:18 PM CDT for Dallam County, Texas; Cimarron County, Oklahoma. It was in force for 44 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 29, 2020, 5:18 PM CDT (22:18 UTC)
Expired
Aug 29, 2020, 6:02 PM CDT
In force
44 min
Issued by
NWS Amarillo, TX
Area
Storm-based polygon
Hail
0.88 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 22:21 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.

IssuedProductOfficeLasted
Aug 29, 3:55 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 10.3 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-pSkew-T log-p diagram, Amarillo Airport, TX at 12:00Z on 2020-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 9 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Amarillo Airport, TX at 12:00Z on 2020-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -14 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
9 J/kg
Mixed-layer CIN
-536 J/kg
Mixed-layer LCL
1920 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
-14 m²/s²
0-3 km storm-relative helicity
-38 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 Aug 29, 2:22 PM CDT, 2 hours 56 minutes earlier.

Area forecast discussion, Aug 29, 2:22 PM CDT, 2 hours 56 minutes before
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Hazardous weather outlook, Aug 29, 4:09 PM CDT, 1 hour 9 minutes before
Hazardous Weather Outlook
National Weather Service Amarillo TX
409 PM CDT Sat Aug 29 2020

OKZ001>003-TXZ001>020-317-300915-
Cimarron-Texas-Beaver-Dallam-Sherman-Hansford-Ochiltree-Lipscomb-
Hartley-Moore-Hutchinson-Roberts-Hemphill-Oldham-Potter-Carson-
Gray-Wheeler-Deaf Smith-Randall-Armstrong-Donley-Collingsworth-
Palo Duro Canyon-
409 PM CDT Sat Aug 29 2020

This Hazardous Weather Outlook is for the Texas and Oklahoma
Panhandles.

.DAY ONE...Tonight.

Thunderstorms will be possible across the Panhandles tonight.
Thunderstorms may become strong to severe with hail, damaging
winds, and locally heavy rain as the primary threats.
Additionally, a tornado cannot be ruled out across the
northwestern Texas Panhandle. A Severe Thunderstorm Watch is in
effect until 10 PM CDT across the western Panhandles.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Thunderstorms will be possible Sunday through Wednesday afternoon
across the Oklahoma and Texas Panhandles. Thunderstorms on each
day could be strong to severe with hail and damaging wind gusts
possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this evening.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 28, 10:30 PM CDTSpecial Weather StatementAMADallam30 min
Aug 28, 11:30 PM CDTSpecial Weather StatementAMASherman30 min
Aug 28, 11:45 PM CDTSpecial Weather StatementAMASherman30 min
Aug 29, 6:08 PM CDTSpecial Weather StatementAMADallam67 min
Aug 29, 6:47 PM CDTSpecial Weather StatementAMAOldham28 min
Aug 29, 6:55 PM CDTSevere Thunderstorm WarningAMADallam, Hartley, Moore, Oldham, Sherman65 min
Aug 28, 7:11 PM CDTSpecial Weather StatementAMACimarron49 min
Aug 28, 7:29 PM CDTSpecial Weather StatementAMACimarron46 min
Aug 28, 8:13 PM CDTSpecial Weather StatementAMACimarron32 min
Aug 29, 12:26 AM CDTSpecial Weather StatementAMATexas34 min

Nearby

Severe Thunderstorm Warnings in Texas, 2020Severe Thunderstorm Warnings in Oklahoma, 2020Every 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.