Alert archive / Texas / Mesoscale Discussions in 2017

Mesoscale Discussion 734

May 16, 20178 counties in Oklahoma; 21 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 16, 2017, 3:36 PM CDT for 8 counties in Oklahoma; 21 counties in Texas. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued: May 16, 2017, 3:36 PM CDT (20:36 UTC)
Expired: May 16, 2017, 4:30 PM CDT
In force: 54 min
Issued by: the Storm Prediction Center

All 29 counties

Beaver County, OK, Beckham County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Roger Mills County, OK, Woodward County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Foard County, TX, Gray County, TX, Hall County, TX, Hardeman County, TX, Hemphill County, TX, King County, TX, Lipscomb County, TX, Motley County, TX, Ochiltree County, TX, Roberts County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 101 km from the middle of the area, began a volume at 20:36 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 12:00Z, 8.6 hours before the alert went out and 100 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: 837 J/kg
Mixed-layer CIN: -240 J/kg
Mixed-layer LCL: 1292 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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
May 16, 1:19 PM CDT	Mesoscale Discussion	SPC	Beaver, Beckham, Ellis, Greer, Harmon, Harper and 2 more	56 min
May 16, 1:54 PM CDT	Tornado Watch PDS	SPC	Beaver, Beckham, Blaine, Caddo, Custer, Dewey and 12 more	8 hr
May 16, 4:56 PM CDT	Mesoscale Discussion	SPC	Collingsworth, Wheeler	64 min
May 16, 5:29 PM CDT	Mesoscale Discussion	SPC	Borden, Coke, Crockett, Fisher, Garza, Glasscock and 14 more	2 hr

Nearby

Mesoscale Discussions in Texas, 2017 Mesoscale Discussions in Oklahoma, 2017 Every mesoscale discussion in 2017

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.