Alert archive / Oklahoma / Mesoscale Discussions in 2014

Mesoscale Discussion 658

May 22, 20148 counties in Oklahoma; 6 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 22, 2014, 2:22 PM CDT for 8 counties in Oklahoma; 6 counties in Texas. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: May 22, 2014, 2:22 PM CDT (19:22 UTC)
Expired: May 22, 2014, 4:15 PM CDT
In force: 113 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Alfalfa County, OK, Dewey County, OK, Ellis County, OK, Grant County, OK, Major County, OK, Roger Mills County, OK, Woods County, OK, Woodward County, OK, Armstrong County, TX, Carson County, TX, Gray County, TX, Hemphill County, TX, Lipscomb County, TX, Roberts County, TX

The radar

The Amarillo radar (KAMA), 175 km from the middle of the area, began a volume at 19:22 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, 7.4 hours before the alert went out and 174 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: 679 J/kg
Mixed-layer CIN: -247 J/kg
Mixed-layer LCL: 1350 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 149 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
May 22, 12:53 PM CDT	Severe Thunderstorm Watch	SPC	Cimarron, Texas	7 hr
May 22, 5:55 PM CDT	Mesoscale Discussion	SPC	Cimarron, Texas	65 min
May 21, 7:15 PM CDT	Mesoscale Discussion	SPC	Andrews, Armstrong, Borden, Brewster, Briscoe, Carson and 30 more	60 min
May 22, 12:32 PM CDT	Mesoscale Discussion	SPC	Bailey, Deaf Smith, Oldham, Parmer	88 min
May 22, 2:51 PM CDT	Mesoscale Discussion	SPC	Brewster, Crane, Culberson, Ector, Jeff Davis, Loving and 5 more	54 min

Nearby

Mesoscale Discussions in Oklahoma, 2014 Mesoscale Discussions in Texas, 2014 Every mesoscale discussion in 2014

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.