Alert archive / Oklahoma / Mesoscale Discussions in 2014

Mesoscale Discussion 248

April 2, 20149 counties in Kansas; Jasper County, Missouri; 18 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Apr 2, 2014, 2:19 PM CDT for 9 counties in Kansas; Jasper County, Missouri; 18 counties in Oklahoma. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Apr 2, 2014, 2:19 PM CDT (19:19 UTC)
Expired: Apr 2, 2014, 4:15 PM CDT
In force: 116 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 28 counties

Chautauqua County, KS, Cherokee County, KS, Cowley County, KS, Crawford County, KS, Elk County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Jasper County, MO, Alfalfa County, OK, Blaine County, OK, Craig County, OK, Custer County, OK, Dewey County, OK, Garfield County, OK, Grant County, OK, Kay County, OK, Kingfisher County, OK, Logan County, OK, Major County, OK, Noble County, OK, Nowata County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Washington County, OK

The radar

The Vance AFB radar (KVNX), 87 km from the middle of the area, began a volume at 19:19 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 watches that followed

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

Tornado Watch 46Apr 2, 2:45 PM CDT

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 7.3 hours before the alert went out and 132 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: 1841 J/kg
Mixed-layer CIN: -176 J/kg
Mixed-layer LCL: 616 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 483 m²/s²
0-3 km storm-relative helicity: 444 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 5.6

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
Apr 1, 11:33 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Atchison, Bourbon, Butler, Chase and 35 more	2 hr
Apr 2, 2:41 PM CDT	Tornado Watch	SPC	Allen, Bourbon, Butler, Chautauqua, Cherokee, Cowley and 10 more	7 hr
Apr 2, 6:00 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Butler, Chautauqua, Cherokee and 13 more	60 min
Apr 2, 9:17 AM CDT	Mesoscale Discussion	SPC	Crawford, Franklin, Gasconade, Jefferson, Lincoln, Maries and 10 more	88 min
Apr 2, 3:20 PM CDT	Mesoscale Discussion	SPC	Dunklin, Mississippi, New Madrid, Pemiscot, Scott, Stoddard	2 hr
Apr 1, 8:18 PM CDT	Mesoscale Discussion	SPC	Caddo, Carter, Cleveland, Comanche, Cotton, Garvin and 10 more	87 min
Apr 1, 9:42 PM CDT	Mesoscale Discussion	SPC	Carter, Cleveland, Comanche, Cotton, Garvin, Grady and 7 more	93 min

Nearby

Mesoscale Discussions in Oklahoma, 2014 Mesoscale Discussions in Kansas, 2014 Mesoscale Discussions in Missouri, 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.