Alert archive / Missouri / Mesoscale Discussions in 2015

Mesoscale Discussion 234

April 8, 201518 counties in Kansas; 22 counties in Missouri; 18 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Apr 8, 2015, 2:21 PM CDT for 18 counties in Kansas; 22 counties in Missouri; 18 counties in Oklahoma. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued: Apr 8, 2015, 2:21 PM CDT (19:21 UTC)
Expired: Apr 8, 2015, 4:15 PM CDT
In force: 114 min
Issued by: the Storm Prediction Center
Chance of a watch: 95%

All 58 counties

Allen County, KS, Anderson County, KS, Bourbon County, KS, Chautauqua County, KS, Cherokee County, KS, Coffey County, KS, Cowley County, KS, Crawford County, KS, Elk County, KS, Greenwood County, KS, Labette County, KS, Linn County, KS, Miami County, KS, Montgomery County, KS, Neosho County, KS, Sumner County, KS, Wilson County, KS, Woodson County, KS, Barry County, MO, Barton County, MO, Bates County, MO, Benton County, MO, Camden County, MO, Cass County, MO, Cedar County, MO, Dade County, MO, Dallas County, MO, Greene County, MO, Henry County, MO, Hickory County, MO, Jasper County, MO, Johnson County, MO, Lawrence County, MO, McDonald County, MO, Morgan County, MO, Newton County, MO, Pettis County, MO, Polk County, MO, St. Clair County, MO, Vernon County, MO, Blaine County, OK, Craig County, OK, Delaware County, OK, Dewey County, OK, Garfield County, OK, Grant County, OK, Kay County, OK, Major County, OK, Mayes County, OK, Noble County, OK, Nowata County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Rogers County, OK, Tulsa County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 119 km from the middle of the area, began a volume at 19:20 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

Springfield, MO (KSGF), launched 12:00Z, 7.4 hours before the alert went out and 205 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: 2027 J/kg
Mixed-layer CIN: -171 J/kg
Mixed-layer LCL: 824 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 256 m²/s²
0-3 km storm-relative helicity: 226 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

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 7, 8:24 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Bourbon, Chautauqua, Cherokee, Cowley, Crawford and 7 more	5 hr
Apr 7, 10:13 PM CDT	Mesoscale Discussion	SPC	Allen, Bourbon, Chautauqua, Cherokee, Crawford, Elk and 5 more	2 hr
Apr 8, 6:17 AM CDT	Mesoscale Discussion	SPC	Bourbon, Linn, Miami	88 min
Apr 8, 2:47 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 13 more	4 hr
Apr 8, 3:37 PM CDT	Tornado Watch	SPC	Allen, Barber, Butler, Chase, Chautauqua, Cowley and 16 more	8 hr
Apr 8, 5:31 PM CDT	Mesoscale Discussion	SPC	Chase, Harvey, Kingman, Marion, Pratt, Reno	59 min
Apr 8, 5:45 PM CDT	Mesoscale Discussion	SPC	Johnson, Miami	60 min
Apr 8, 6:39 AM CDT	Severe Thunderstorm Watch	SPC	Adair, Audrain, Barton, Bates, Benton, Boone and 54 more	6 hr
Apr 8, 9:33 AM CDT	Mesoscale Discussion	SPC	Adair, Audrain, Benton, Boone, Caldwell, Callaway and 45 more	57 min
Apr 8, 12:01 PM CDT	Mesoscale Discussion	SPC	Cole, Crawford, Dent, Franklin, Gasconade, Iron and 15 more	59 min
Apr 8, 12:50 PM CDT	Mesoscale Discussion	SPC	Franklin, Gasconade, Jefferson, Lincoln, Montgomery, Osage and 4 more	85 min
Apr 8, 1:05 PM CDT	Severe Thunderstorm Watch	SPC	Callaway, Crawford, Franklin, Gasconade, Jefferson, Lincoln and 10 more	5 hr
Apr 8, 2:43 PM CDT	Mesoscale Discussion	SPC	Crawford, Franklin, Gasconade, Jefferson, Lincoln, Montgomery and 9 more	92 min
Apr 8, 3:42 PM CDT	Mesoscale Discussion	SPC	Iron, Jefferson, Perry, Sainte Genevieve, Saint Francois, Washington	63 min
Apr 8, 4:07 PM CDT	Tornado Watch	SPC	Bollinger, Cape Girardeau, Iron, Jefferson, Madison, Perry and 3 more	4 hr

Nearby

Mesoscale Discussions in Missouri, 2015 Mesoscale Discussions in Kansas, 2015 Mesoscale Discussions in Oklahoma, 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.