Alert archive / Missouri / Mesoscale Discussions in 2018

Mesoscale Discussion 1549

October 9, 20184 states

The Storm Prediction Center issued this mesoscale discussion at Oct 9, 2018, 11:31 AM CDT for 4 states. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: Oct 9, 2018, 11:31 AM CDT (16:31 UTC)
Expired: Oct 9, 2018, 1:00 PM CDT
In force: 89 min
Issued by: the Storm Prediction Center

All 71 counties

Benton County, AR, Crawford County, AR, Madison County, AR, Washington County, AR, Allen County, KS, Anderson County, KS, Bourbon County, KS, Cherokee County, KS, Coffey County, KS, Crawford County, KS, Douglas County, KS, Elk County, KS, Franklin County, KS, Greenwood County, KS, Jefferson County, KS, Johnson County, KS, Labette County, KS, Leavenworth County, KS, Linn County, KS, Lyon County, KS, Miami County, KS, Montgomery County, KS, Neosho County, KS, Osage County, KS, Shawnee County, KS, Wilson County, KS, Woodson County, KS, Wyandotte County, KS, Barry County, MO, Barton County, MO, Bates County, MO, Benton County, MO, Buchanan County, MO, Caldwell County, MO, Cass County, MO, Cedar County, MO, Clay County, MO, Clinton County, MO, Dade County, MO, Daviess County, MO, DeKalb County, MO, Greene County, MO, Harrison County, MO, Henry County, MO, Hickory County, MO, Jackson County, MO, Jasper County, MO, Johnson County, MO, Lafayette County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Platte County, MO, Polk County, MO, Ray County, MO, St. Clair County, MO, Stone County, MO, Vernon County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Delaware County, OK, Haskell County, OK, Mayes County, OK, Muskogee County, OK, Nowata County, OK, Ottawa County, OK, Rogers County, OK, Sequoyah County, OK, Wagoner County, OK, Washington County, OK

The radar

The Pleasant Hill radar (KEAX), 145 km from the middle of the area, began a volume at 16:35 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, 4.5 hours before the alert went out and 138 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: 372 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 747 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 159 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.2

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
Oct 9, 12:17 PM CDT	Tornado Watch	SPC	Baxter, Benton, Boone, Carroll, Crawford, Franklin and 9 more	8 hr
Oct 9, 6:22 PM CDT	Mesoscale Discussion	SPC	Baxter, Boone, Calhoun, Clark, Cleburne, Cleveland and 26 more	83 min
Oct 9, 9:09 AM CDT	Mesoscale Discussion	SPC	Chautauqua, Cherokee, Cowley, Elk, Labette, Montgomery	2 hr
Oct 9, 1:46 PM CDT	Tornado Watch	SPC	Anderson, Atchison, Doniphan, Douglas, Franklin, Jefferson and 5 more	7 hr
Oct 9, 3:06 PM CDT	Mesoscale Discussion	SPC	Douglas, Franklin, Jefferson, Johnson, Leavenworth, Linn and 2 more	84 min
Oct 8, 7:03 PM CDT	Mesoscale Discussion	SPC	Andrew, Buchanan, Caldwell, Clinton, Daviess, DeKalb and 7 more	57 min
Oct 9, 12:59 PM CDT	Mesoscale Discussion	SPC	Adair, Clark, Grundy, Knox, Mercer, Putnam and 3 more	3 hr
Oct 9, 8:48 AM CDT	Tornado Watch	SPC	Adair, Atoka, Bryan, Cherokee, Choctaw, Coal and 31 more	5 hr

Nearby

Mesoscale Discussions in Missouri, 2018 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.