Alert archive / South Dakota / Mesoscale Discussions in 2014

Mesoscale Discussion 1028

June 16, 201414 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 16, 2014, 8:37 PM CDT for 14 counties in South Dakota. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: Jun 16, 2014, 8:37 PM CDT (01:37 UTC)
Expired: Jun 16, 2014, 10:00 PM CDT
In force: 83 min
Issued by: the Storm Prediction Center

Counties Bon Homme County, SD, Charles Mix County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Hanson County, SD, Hutchinson County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Turner County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 78 km from the middle of the area, began a volume at 01:37 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

Aberdeen, SD (KABR), launched 00:00Z, 1.6 hours before the alert went out and 165 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: 86 J/kg
Mixed-layer CIN: -282 J/kg
Mixed-layer LCL: 1198 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 55 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 16, 7:47 PM CDT	Mesoscale Discussion	SPC	Bon Homme, Charles Mix, Davison, Douglas, Gregory, Hanson and 8 more	58 min
Jun 16, 7:49 PM CDT	Mesoscale Discussion	SPC	Perkins	86 min
Jun 16, 9:56 PM CDT	Severe Thunderstorm Watch	SPC	Union	5 hr
Jun 16, 11:11 PM CDT	Mesoscale Discussion	SPC	Union	64 min
Jun 17, 12:40 PM CDT	Mesoscale Discussion	SPC	Butte, Custer, Fall River, Harding, Lawrence, Pennington	2 hr
Jun 17, 1:31 PM CDT	Tornado Watch	SPC	Bennett, Butte, Custer, Harding, Jackson, Lawrence and 3 more	7 hr
Jun 17, 3:22 PM CDT	Mesoscale Discussion	SPC	Bennett, Butte, Custer, Fall River, Harding, Jackson and 5 more	113 min
Jun 17, 4:53 PM CDT	Tornado Watch	SPC	Mellette, Todd, Tripp	6 hr
Jun 17, 5:12 PM CDT	Mesoscale Discussion	SPC	Bon Homme, Charles Mix, Clay, Davison, Douglas, Hanson and 7 more	2 hr
Jun 17, 6:02 PM CDT	Mesoscale Discussion	SPC	Bennett, Butte, Harding, Jackson, Meade, Oglala Lakota and 1 more	88 min
Jun 17, 6:48 PM CDT	Tornado Watch	SPC	Bon Homme, Clay, Hanson, Hutchinson, Lake, Lincoln and 7 more	6 hr

Nearby

Mesoscale Discussions in South Dakota, 2014 Every mesoscale discussion in 2014

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.