Alert archive / Missouri / Mesoscale Discussions in 2015

Mesoscale Discussion 1108

June 21, 20157 counties in Iowa; 12 counties in Missouri; Nemaha County, Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 21, 2015, 6:44 PM CDT for 7 counties in Iowa; 12 counties in Missouri; Nemaha County, Nebraska. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Jun 21, 2015, 6:44 PM CDT (23:44 UTC)
Expired: Jun 21, 2015, 8:15 PM CDT
In force: 91 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Adams County, IA, Decatur County, IA, Fremont County, IA, Page County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Andrew County, MO, Atchison County, MO, Daviess County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Livingston County, MO, Mercer County, MO, Nodaway County, MO, Sullivan County, MO, Worth County, MO, Nemaha County, NE

The radar

The Des Moines radar (KDMX), 157 km from the middle of the area, began a volume at 23:44 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

Omaha, NE (KOAX), launched 12:00Z, 11.7 hours before the alert went out and 183 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: 36 J/kg
Mixed-layer CIN: -449 J/kg
Mixed-layer LCL: 1616 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: -26 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

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
Jun 20, 10:12 PM CDT	Mesoscale Discussion	SPC	Appanoose, Boone, Clarke, Dallas, Davis, Decatur and 26 more	63 min
Jun 21, 2:58 AM CDT	Mesoscale Discussion	SPC	Audrain, Lincoln, Monroe, Montgomery, Pike, Ralls and 1 more	2 hr
Jun 21, 9:42 AM CDT	Mesoscale Discussion	SPC	Audrain, Boone, Buchanan, Caldwell, Callaway, Carroll and 32 more	2 hr
Jun 21, 12:12 PM CDT	Severe Thunderstorm Watch	SPC	Andrew, Audrain, Boone, Buchanan, Caldwell, Callaway and 28 more	5 hr
Jun 21, 3:03 PM CDT	Mesoscale Discussion	SPC	Andrew, Buchanan, Caldwell, Carroll, Clay, Clinton and 9 more	87 min
Jun 21, 3:56 PM CDT	Mesoscale Discussion	SPC	Benton, Camden, Cape Girardeau, Cole, Crawford, Franklin and 14 more	2 hr
Jun 20, 8:47 PM CDT	Mesoscale Discussion	SPC	Cherry, Grant, Hooker, Sheridan, Thomas	58 min
Jun 21, 1:05 AM CDT	Mesoscale Discussion	SPC	Brown, Cherry	85 min
Jun 21, 8:47 AM CDT	Mesoscale Discussion	SPC	Frontier, Red Willow	118 min

Nearby

Mesoscale Discussions in Missouri, 2015 Mesoscale Discussions in Iowa, 2015 Mesoscale Discussions in Nebraska, 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.