Alert archive / Kansas / Mesoscale Discussions in 2018

Mesoscale Discussion 956

June 30, 201824 counties in Kansas; 23 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jun 30, 2018, 3:15 PM CDT for 24 counties in Kansas; 23 counties in Oklahoma. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Jun 30, 2018, 3:15 PM CDT (20:15 UTC)
Expired: Jun 30, 2018, 4:45 PM CDT
In force: 90 min
Issued by: the Storm Prediction Center
Chance of a watch: 60%

All 47 counties

Allen County, KS, Anderson County, KS, Bourbon County, KS, Butler County, KS, Chase County, KS, Chautauqua County, KS, Cherokee County, KS, Coffey County, KS, Cowley County, KS, Crawford County, KS, Elk County, KS, Franklin County, KS, Greenwood County, KS, Labette County, KS, Linn County, KS, Lyon County, KS, Montgomery County, KS, Morris County, KS, Neosho County, KS, Osage County, KS, Sedgwick County, KS, Sumner County, KS, Wilson County, KS, Woodson County, KS, Blaine County, OK, Caddo County, OK, Canadian County, OK, Cleveland County, OK, Creek County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Kay County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, McClain County, OK, Noble County, OK, Nowata County, OK, Oklahoma County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Stephens County, OK, Tulsa County, OK, Washington County, OK

The radar

The Wichita radar (KICT), 101 km from the middle of the area, began a volume at 20:16 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.

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 8.3 hours before the alert went out and 196 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: 1104 J/kg
Mixed-layer CIN: -172 J/kg
Mixed-layer LCL: 1066 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -8 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Jun 29, 9:37 PM CDT	Mesoscale Discussion	SPC	Decatur, Ellis, Finney, Gove, Graham, Lane and 12 more	113 min
Jun 30, 3:50 PM CDT	Severe Thunderstorm Watch	SPC	Butler, Chase, Chautauqua, Cowley, Elk, Greenwood and 7 more	5 hr
Jun 30, 4:40 PM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Chase, Clay, Coffey, Doniphan and 19 more	95 min
Jun 30, 4:57 PM CDT	Severe Thunderstorm Watch	SPC	Anderson, Atchison, Brown, Clay, Coffey, Dickinson and 20 more	6 hr
Jun 30, 5:40 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Rawlins, Sherman, Thomas	2 hr
Jun 30, 6:09 PM CDT	Severe Thunderstorm Watch	SPC	Cheyenne, Decatur, Gove, Graham, Jewell, Logan and 11 more	7 hr
Jun 30, 6:15 PM CDT	Mesoscale Discussion	SPC	Butler, Chautauqua, Cowley, Elk, Greenwood, Harper and 8 more	90 min
Jun 30, 12:43 PM CDT	Mesoscale Discussion	SPC	Beckham, Blaine, Caddo, Canadian, Carter, Cleveland and 25 more	92 min

Nearby

Mesoscale Discussions in Kansas, 2018 Mesoscale Discussions in Oklahoma, 2018 Every mesoscale discussion in 2018

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.