Alert archive / Missouri / Mesoscale Discussions in 2011

Mesoscale Discussion 940

May 24, 20119 counties in Kansas; 20 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 24, 2011, 7:07 PM CDT for 9 counties in Kansas; 20 counties in Missouri. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: May 24, 2011, 7:07 PM CDT (00:07 UTC)
Expired: May 24, 2011, 8:00 PM CDT
In force: 53 min
Issued by: the Storm Prediction Center

All 29 counties

Bourbon County, KS, Cherokee County, KS, Crawford County, KS, Doniphan County, KS, Johnson County, KS, Leavenworth County, KS, Linn County, KS, Miami County, KS, Wyandotte County, KS, Andrew County, MO, Barton County, MO, Bates County, MO, Buchanan County, MO, Cass County, MO, Cedar County, MO, Clay County, MO, Clinton County, MO, Dade County, MO, DeKalb County, MO, Henry County, MO, Holt County, MO, Jackson County, MO, Jasper County, MO, Johnson County, MO, Nodaway County, MO, Platte County, MO, Ray County, MO, St. Clair County, MO, Vernon County, MO

The radar

The Pleasant Hill radar (KEAX), 30 km from the middle of the area, began a volume at 00:06 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.

Tornado Watch 363May 24, 7:25 PM CDT

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 0.1 hours before the alert went out and 93 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: 1376 J/kg
Mixed-layer CIN: -162 J/kg
Mixed-layer LCL: 683 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 302 m²/s²
0-3 km storm-relative helicity: 400 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

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 24, 7:26 PM CDT	Tornado Watch	SPC	Atchison, Bourbon, Cherokee, Crawford, Doniphan, Johnson and 4 more	7 hr
May 24, 9:26 PM CDT	Mesoscale Discussion	SPC	Butler, Chase, Clay, Coffey, Cowley, Elk and 17 more	64 min
May 25, 10:37 AM CDT	Tornado Watch	SPC	Johnson, Leavenworth, Miami, Wyandotte	7 hr
May 24, 7:42 PM CDT	Mesoscale Discussion	SPC	McDonald	63 min
May 24, 11:24 PM CDT	Mesoscale Discussion	SPC	Benton, Camden, Christian, Cooper, Dallas, Douglas and 15 more	96 min
May 25, 12:48 AM CDT	Mesoscale Discussion	SPC	Audrain, Bollinger, Boone, Butler, Callaway, Cape Girardeau and 46 more	57 min
May 25, 1:22 AM CDT	Tornado Watch	SPC	Audrain, Boone, Callaway, Camden, Christian, Clark and 43 more	7 hr
May 25, 4:58 AM CDT	Mesoscale Discussion	SPC	Crawford, Dent, Franklin, Iron, Jefferson, Reynolds and 7 more	92 min
May 25, 5:46 AM CDT	Tornado Watch	SPC	Perry	7 hr
May 25, 7:31 AM CDT	Mesoscale Discussion	SPC	Bollinger, Butler, Cape Girardeau, Dunklin, Mississippi, New Madrid and 4 more	59 min
May 25, 9:54 AM CDT	Mesoscale Discussion	SPC	Benton, Butler, Camden, Carter, Christian, Dallas and 24 more	96 min
May 25, 10:18 AM CDT	Mesoscale Discussion	SPC	Carter, Dent, Howell, Iron, Jefferson, Madison and 6 more	57 min
May 25, 11:02 AM CDT	Mesoscale Discussion	SPC	Bollinger, Butler, Cape Girardeau, Carter, Crawford, Dent and 17 more	28 min
May 25, 11:09 AM CDT	Tornado Watch PDS	SPC	Bollinger, Butler, Cape Girardeau, Carter, Franklin, Iron and 19 more	10 hr
May 25, 11:52 AM CDT	Mesoscale Discussion	SPC	Dunklin, Pemiscot	83 min
May 25, 12:28 PM CDT	Tornado Watch PDS	SPC	Dunklin, Pemiscot	8 hr
May 25, 1:28 PM CDT	Mesoscale Discussion	SPC	Adair, Audrain, Boone, Caldwell, Callaway, Camden and 44 more	92 min
May 25, 2:31 PM CDT	Tornado Watch	SPC	Clark, Scotland	7 hr
May 25, 2:32 PM CDT	Mesoscale Discussion	SPC	Audrain, Lincoln, Marion, Monroe, Montgomery, Pike and 2 more	58 min
May 25, 2:56 PM CDT	Mesoscale Discussion	SPC	Dunklin, Pemiscot	94 min
May 25, 3:10 PM CDT	Mesoscale Discussion	SPC	Bollinger, Butler, Cape Girardeau, Carter, Madison, Mississippi and 9 more	95 min
May 25, 5:56 PM CDT	Mesoscale Discussion	SPC	Dunklin, Pemiscot	64 min
May 25, 6:25 PM CDT	Mesoscale Discussion	SPC	Bollinger, Butler, Cape Girardeau, Mississippi, Perry, Scott and 2 more	2 hr

Nearby

Mesoscale Discussions in Missouri, 2011 Mesoscale Discussions in Kansas, 2011 Every mesoscale discussion in 2011

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.