Alert archive / Texas / Mesoscale Discussions in 2023

Mesoscale Discussion 1439

July 6, 20236 counties in Oklahoma; 13 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jul 6, 2023, 3:50 AM CDT for 6 counties in Oklahoma; 13 counties in Texas. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: Jul 6, 2023, 3:50 AM CDT (08:50 UTC)
Expired: Jul 6, 2023, 5:15 AM CDT
In force: 85 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 450...451

Counties Beckham County, OK, Custer County, OK, Ellis County, OK, Greer County, OK, Roger Mills County, OK, Washita County, OK, Armstrong County, TX, Carson County, TX, Collingsworth County, TX, Donley County, TX, Gray County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Moore County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 95 km from the middle of the area, began a volume at 08:52 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, 8.8 hours before the alert went out and 94 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: 1737 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 2105 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.3

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 5, 8:55 PM CDT	Severe Thunderstorm Watch	SPC	Beaver, Cimarron, Texas	8 hr
Jul 5, 11:12 PM CDT	Mesoscale Discussion	SPC	Beaver, Cimarron, Ellis, Harper, Texas, Woodward	2 hr
Jul 5, 11:56 PM CDT	Severe Thunderstorm Watch	SPC	Alfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 19 more	8 hr
Jul 6, 1:40 AM CDT	Mesoscale Discussion	SPC	Beaver, Cimarron, Texas	95 min
Jul 6, 6:06 AM CDT	Mesoscale Discussion	SPC	Beckham, Caddo, Comanche, Cotton, Custer, Grady and 7 more	84 min
Jul 6, 12:13 PM CDT	Mesoscale Discussion	SPC	LeFlore, McCurtain, Pushmataha	2 hr
Jul 6, 12:47 AM CDT	Mesoscale Discussion	SPC	Briscoe, Castro, Crosby, Dickens, Floyd, Hale and 5 more	88 min
Jul 6, 2:13 PM CDT	Mesoscale Discussion	SPC	Bailey, Parmer	2 hr

Nearby

Mesoscale Discussions in Texas, 2023 Mesoscale Discussions in Oklahoma, 2023 Every mesoscale discussion in 2023

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.