Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 167

March 31, 201510 counties in Oklahoma; 21 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 31, 2015, 6:05 PM CDT for 10 counties in Oklahoma; 21 counties in Texas. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: Mar 31, 2015, 6:05 PM CDT (23:05 UTC)
Expired: Mar 31, 2015, 7:30 PM CDT
In force: 85 min
Issued by: the Storm Prediction Center

All 31 counties

Beckham County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Roger Mills County, OK, Washita County, OK, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Dickens County, TX, Donley County, TX, Fisher County, TX, Foard County, TX, Gray County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Hemphill County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Lipscomb County, TX, Motley County, TX, Stonewall County, TX, Wheeler County, TX, Wilbarger County, TX

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 14Mar 31, 9:40 PM CDT

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 11.1 hours before the alert went out and 184 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2881 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 12 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 31, 3:27 PM CDT	Mesoscale Discussion	SPC	Atoka, Beckham, Bryan, Caddo, Canadian, Carter and 28 more	2 hr
Mar 31, 3:57 PM CDT	Severe Thunderstorm Watch	SPC	Atoka, Beckham, Blaine, Bryan, Caddo, Canadian and 39 more	6 hr

Nearby

Mesoscale Discussions in Texas, 2015 Mesoscale Discussions in Oklahoma, 2015 Every mesoscale discussion in 2015

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.