Alert archive / Kansas / Mesoscale Discussions in 2018

Mesoscale Discussion 960

June 30, 20184 states

The Storm Prediction Center issued this mesoscale discussion at Jun 30, 2018, 4:40 PM CDT for 4 states. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: Jun 30, 2018, 4:40 PM CDT (21:40 UTC)
Expired: Jun 30, 2018, 6:15 PM CDT
In force: 95 min
Issued by: the Storm Prediction Center
Chance of a watch: 60%

All 45 counties

Ringgold County, IA, Taylor County, IA, Atchison County, KS, Brown County, KS, Chase County, KS, Clay County, KS, Coffey County, KS, Doniphan County, KS, Douglas County, KS, Franklin County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Lyon County, KS, Marshall County, KS, Miami County, KS, Morris County, KS, Nemaha County, KS, Osage County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Washington County, KS, Wyandotte County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Caldwell County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Harrison County, MO, Holt County, MO, Jackson County, MO, Nodaway County, MO, Platte County, MO, Worth County, MO, Nemaha County, NE, Pawnee County, NE, Richardson County, NE

The radar

The Topeka radar (KTWX), 93 km from the middle of the area, began a volume at 21:40 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.

Severe Thunderstorm Watch 250Jun 30, 4:55 PM CDT

The nearest sounding before it

Topeka, KS (KFOE), launched 12:00Z, 9.7 hours before the alert went out and 68 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: 1716 J/kg
Mixed-layer CIN: -151 J/kg
Mixed-layer LCL: 1357 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: -18 m²/s²
0-3 km storm-relative helicity: 73 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 30, 12:40 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Calhoun, Carroll, Cerro Gordo, Cherokee, Chickasaw and 26 more	3 hr
Jun 30, 1:39 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Adams, Allamakee, Audubon, Boone, Bremer and 46 more	7 hr
Jun 30, 3:40 PM CDT	Mesoscale Discussion	SPC	Audubon, Boone, Butler, Calhoun, Carroll, Cass and 25 more	2 hr
Jun 30, 6:09 PM CDT	Mesoscale Discussion	SPC	Fremont, Mills, Montgomery, Page	96 min
Jun 29, 9:37 PM CDT	Mesoscale Discussion	SPC	Decatur, Ellis, Finney, Gove, Graham, Lane and 12 more	113 min
Jun 30, 3:15 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 18 more	90 min
Jun 30, 3:50 PM CDT	Severe Thunderstorm Watch	SPC	Butler, Chase, Chautauqua, Cowley, Elk, Greenwood and 7 more	5 hr
Jun 30, 4:57 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, 1:35 AM CDT	Mesoscale Discussion	SPC	Antelope, Arthur, Banner, Blaine, Brown, Garden and 12 more	85 min
Jun 30, 2:03 PM CDT	Mesoscale Discussion	SPC	Arthur, Banner, Box Butte, Cheyenne, Dawes, Deuel and 7 more	87 min
Jun 30, 3:03 PM CDT	Severe Thunderstorm Watch	SPC	Banner, Box Butte, Cheyenne, Dawes, Kimball, Morrill and 2 more	7 hr
Jun 30, 3:11 PM CDT	Mesoscale Discussion	SPC	Adams, Boone, Buffalo, Chase, Clay, Custer and 29 more	94 min
Jun 30, 3:26 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Arthur, Blaine, Buffalo, Chase, Cherry and 39 more	8 hr

Nearby

Mesoscale Discussions in Kansas, 2018 Mesoscale Discussions in Missouri, 2018 Mesoscale Discussions in Nebraska, 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.