Alert archive / Kansas / Mesoscale Discussions in 2015

Mesoscale Discussion 528

May 6, 201535 counties in Kansas; 22 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 6, 2015, 9:40 PM CDT for 35 counties in Kansas; 22 counties in Nebraska. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: May 6, 2015, 9:40 PM CDT (02:40 UTC)
Expired: May 6, 2015, 11:15 PM CDT
In force: 95 min
Issued by: the Storm Prediction Center

All 57 counties

Barton County, KS, Butler County, KS, Chase County, KS, Clay County, KS, Cloud County, KS, Dickinson County, KS, Ellsworth County, KS, Geary County, KS, Harvey County, KS, Jackson County, KS, Jewell County, KS, Kingman County, KS, Lincoln County, KS, Lyon County, KS, Marion County, KS, Marshall County, KS, McPherson County, KS, Mitchell County, KS, Morris County, KS, Nemaha County, KS, Osborne County, KS, Ottawa County, KS, Pottawatomie County, KS, Reno County, KS, Republic County, KS, Rice County, KS, Riley County, KS, Russell County, KS, Saline County, KS, Sedgwick County, KS, Smith County, KS, Stafford County, KS, Sumner County, KS, Wabaunsee County, KS, Washington County, KS, Adams County, NE, Cass County, NE, Clay County, NE, Fillmore County, NE, Franklin County, NE, Gage County, NE, Hall County, NE, Hamilton County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Seward County, NE, Thayer County, NE, Webster County, NE, York County, NE

The radar

The Topeka radar (KTWX), 104 km from the middle of the area, began a volume at 02:41 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

Topeka, KS (KFOE), launched 00:00Z, 2.7 hours before the alert went out and 155 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: 498 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 1054 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 263 m²/s²
0-3 km storm-relative helicity: 410 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 9.6

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
May 6, 7:40 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Atchison, Brown, Butler, Chase and 37 more	65 min
May 6, 8:31 PM CDT	Tornado Watch	SPC	Butler, Chase, Chautauqua, Clay, Cloud, Cowley and 28 more	5 hr
May 6, 11:17 PM CDT	Mesoscale Discussion	SPC	Brown, Butler, Chase, Clay, Cloud, Cowley and 27 more	88 min
May 7, 1:44 PM CDT	Mesoscale Discussion	SPC	Barber, Barton, Clay, Dickinson, Edwards, Ellsworth and 23 more	2 hr
May 7, 2:47 PM CDT	Mesoscale Discussion	SPC	Grant, Hamilton, Haskell, Kearny, Morton, Stanton and 1 more	118 min

Nearby

Mesoscale Discussions in Kansas, 2015 Mesoscale Discussions in Nebraska, 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; radar from the NEXRAD Level II archive.