Alert archive / Missouri / Mesoscale Discussions in 2013

Mesoscale Discussion 810

May 26, 201313 counties in Iowa; 38 counties in Missouri; 9 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 26, 2013, 6:47 PM CDT for 13 counties in Iowa; 38 counties in Missouri; 9 counties in Nebraska. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: May 26, 2013, 6:47 PM CDT (23:47 UTC)
Expired: May 26, 2013, 8:15 PM CDT
In force: 88 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

All 60 counties

Adams County, IA, Cass County, IA, Clarke County, IA, Decatur County, IA, Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Wayne County, IA, Adair County, MO, Andrew County, MO, Atchison County, MO, Audrain County, MO, Boone County, MO, Caldwell County, MO, Callaway County, MO, Carroll County, MO, Chariton County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Howard County, MO, Knox County, MO, Lincoln County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Marion County, MO, Mercer County, MO, Monroe County, MO, Montgomery County, MO, Nodaway County, MO, Pike County, MO, Putnam County, MO, Ralls County, MO, Randolph County, MO, Saint Charles County, MO, Saline County, MO, Schuyler County, MO, Shelby County, MO, Sullivan County, MO, Warren County, MO, Worth County, MO, Cass County, NE, Douglas County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Otoe County, NE, Richardson County, NE, Sarpy County, NE, Saunders County, NE

The radar

The Des Moines radar (KDMX), 157 km from the middle of the area, began a volume at 23:50 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 12:00Z, 11.8 hours before the alert went out and 199 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: 693 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 720 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 25, 10:59 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Cherokee, Clay, Ida, Lyon, O'Brien and 5 more	91 min
May 25, 7:36 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Blaine, Buffalo, Custer, Dawson, Franklin and 16 more	4 hr
May 25, 9:43 PM CDT	Mesoscale Discussion	SPC	Adams, Antelope, Blaine, Boone, Buffalo, Butler and 35 more	92 min
May 26, 3:03 PM CDT	Mesoscale Discussion	SPC	Arthur, Blaine, Buffalo, Custer, Dawson, Garden and 8 more	87 min
May 26, 3:49 PM CDT	Mesoscale Discussion	SPC	Banner, Kimball, Scotts Bluff, Sioux	56 min
May 26, 6:55 PM CDT	Mesoscale Discussion	SPC	Adams, Blaine, Boone, Buffalo, Butler, Clay and 27 more	2 hr

Nearby

Mesoscale Discussions in Missouri, 2013 Mesoscale Discussions in Iowa, 2013 Mesoscale Discussions in Nebraska, 2013 Every mesoscale discussion in 2013

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.