Alert archive / Missouri / Mesoscale Discussions in 2006

Mesoscale Discussion 520

April 15, 200616 counties in Iowa; 6 counties in Kansas; 23 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Apr 15, 2006, 9:14 PM CDT for 16 counties in Iowa; 6 counties in Kansas; 23 counties in Missouri. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Apr 15, 2006, 9:14 PM CDT (02:14 UTC)
Expired: Apr 15, 2006, 10:45 PM CDT
In force: 91 min
Issued by: the Storm Prediction Center

All 45 counties

Appanoose County, IA, Boone County, IA, Clarke County, IA, Dallas County, IA, Decatur County, IA, Greene County, IA, Guthrie County, IA, Jasper County, IA, Lucas County, IA, Madison County, IA, Marion County, IA, Monroe County, IA, Polk County, IA, Story County, IA, Warren County, IA, Wayne County, IA, Allen County, KS, Anderson County, KS, Johnson County, KS, Linn County, KS, Miami County, KS, Woodson County, KS, Adair County, MO, Bates County, MO, Caldwell County, MO, Carroll County, MO, Cass County, MO, Chariton County, MO, Grundy County, MO, Henry County, MO, Howard County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Mercer County, MO, Pettis County, MO, Putnam County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, Schuyler County, MO, Sullivan County, MO

The radar

The Pleasant Hill radar (KEAX), 109 km from the middle of the area, began a volume at 02:16 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 (KTOP), launched 00:00Z, 2.2 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: 1495 J/kg
Mixed-layer CIN: -85 J/kg
Mixed-layer LCL: 1459 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: 439 m²/s²
0-3 km storm-relative helicity: 519 m²/s²
Significant tornado parameter: 2.1
Supercell composite: 8.5

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 15, 10:46 PM CDT	Mesoscale Discussion	SPC	Benton, Black Hawk, Bremer, Buchanan, Butler, Cedar and 30 more	119 min
Apr 16, 10:57 AM CDT	Mesoscale Discussion	SPC	Allamakee, Appanoose, Benton, Black Hawk, Bremer, Buchanan and 41 more	2 hr
Apr 16, 11:17 AM CDT	Tornado Watch	SPC	Appanoose, Benton, Black Hawk, Boone, Buchanan, Cedar and 34 more	8 hr
Apr 16, 1:18 PM CDT	Mesoscale Discussion	SPC	Appanoose, Benton, Black Hawk, Boone, Buchanan, Cedar and 34 more	57 min
Apr 16, 3:43 PM CDT	Mesoscale Discussion	SPC	Benton, Cedar, Clinton, Davis, Des Moines, Henry and 11 more	92 min
Apr 15, 11:39 PM CDT	Mesoscale Discussion	SPC	Audrain, Benton, Boone, Callaway, Camden, Cedar and 28 more	66 min
Apr 16, 3:24 PM CDT	Mesoscale Discussion	SPC	Bollinger, Cape Girardeau, Carter, Iron, Jefferson, Madison and 9 more	2 hr

Nearby

Mesoscale Discussions in Missouri, 2006 Mesoscale Discussions in Iowa, 2006 Mesoscale Discussions in Kansas, 2006 Every mesoscale discussion in 2006

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.