Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 162, NWS Amarillo, TX

July 20, 2020Cimarron County, Texas County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at Jul 20, 2020, 10:48 PM CDT for Cimarron County, Texas County, Oklahoma. It was in force for 57 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 20, 2020, 10:48 PM CDT (03:48 UTC)
Expired: Jul 20, 2020, 11:45 PM CDT
In force: 57 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Cimarron County, OK, Texas County, OK

The radar

The Amarillo radar (KAMA), 170 km from the middle of the area, began a volume at 03:48 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, 3.8 hours before the alert went out and 218 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: 396 J/kg
Mixed-layer CIN: -99 J/kg
Mixed-layer LCL: 2041 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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 20, 10:15 PM CDT, 33 minutes earlier.

Area forecast discussion, Jul 20, 10:15 PM CDT, 33 minutes before

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Hazardous weather outlook, Jul 20, 2:52 PM CDT, 7 hours 56 minutes before

Hazardous Weather Outlook
National Weather Service Amarillo TX
252 PM CDT Mon Jul 20 2020

OKZ001>003-TXZ001>020-317-211200-
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-
252 PM CDT Mon Jul 20 2020

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

.DAY ONE...This Afternoon and Tonight.

A few thunderstorms will be possible this afternoon across the
southeast Texas Panhandle. Widespread severe storms are not
expected this afternoon. Thunderstorms are then expected to
develop across the Oklahoma and Texas Panhandles later this
afternoon or evening into tonight. A few storms will have the
potential to become strong to severe, with large hail and damaging
winds the primary hazards.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Thunderstorms will be possible across most of the Oklahoma and
Texas Panhandles Tuesday afternoon through Tuesday night, and
then across western sections of the area Wednesday afternoon and
evening. Although wide spread severe storms are not likely, a few
isolated severe storms cannot be ruled out at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time.

In the hours before

Special weather statement, Jul 20, 8:08 PM CDT, 2 hours 40 minutes before

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Special weather statement, Jul 20, 9:15 PM CDT, 1 hour 33 minutes before

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Special weather statement, Jul 20, 9:44 PM CDT, 1 hour 4 minutes before

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Special weather statement, Jul 20, 9:48 PM CDT, 1 hour before

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Special weather statement, Jul 20, 10:14 PM CDT, 34 minutes before

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Special weather statement, Jul 20, 10:44 PM CDT, 4 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 20, 8:08 PM CDT	Special Weather Statement	AMA	Dallam	37 min
Jul 20, 9:15 PM CDT	Special Weather Statement	AMA	Dallam	30 min
Jul 20, 9:44 PM CDT	Special Weather Statement	AMA	Dallam, Hartley, Oldham	46 min
Jul 20, 10:34 PM CDT	Areal Flood Advisory	AMA	Hansford	116 min
Jul 21, 2:10 PM CDT	Special Weather Statement	AMA	Gray	35 min
Jul 21, 2:46 PM CDT	Special Weather Statement	AMA	Gray	29 min
Jul 21, 3:13 PM CDT	Areal Flood Advisory	AMA	Carson, Donley, Gray	41 min
Jul 21, 4:05 PM CDT	Special Weather Statement	AMA	Armstrong	25 min
Jul 21, 4:30 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Donley	60 min
Jul 20, 9:48 PM CDT	Special Weather Statement	AMA	Cimarron	27 min
Jul 20, 10:14 PM CDT	Special Weather Statement	AMA	Texas	31 min
Jul 20, 10:44 PM CDT	Special Weather Statement	AMA	Texas	46 min

Nearby

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.