Alert archive / South Dakota / Mesoscale Discussions in 2016

Mesoscale Discussion 1301

July 16, 201617 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 16, 2016, 6:07 PM MDT for 17 counties in South Dakota. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: Jul 16, 2016, 6:07 PM MDT (00:07 UTC)
Expired: Jul 16, 2016, 7:30 PM MDT
In force: 83 min
Issued by: the Storm Prediction Center

Counties Bennett County, SD, Dewey County, SD, Haakon County, SD, Hughes County, SD, Hyde County, SD, Jackson County, SD, Jones County, SD, Lyman County, SD, Meade County, SD, Mellette County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Todd County, SD, Tripp County, SD, Walworth County, SD, Ziebach County, SD

The radar

The Rapid City radar (KUDX), 138 km from the middle of the area, began a volume at 00:10 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, 0.1 hours before the alert went out and 227 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: 687 J/kg
Mixed-layer CIN: -137 J/kg
Mixed-layer LCL: 1298 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 295 m²/s²
0-3 km storm-relative helicity: 515 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 16, 7:55 PM MDT	Mesoscale Discussion	SPC	Brookings, Kingsbury, Lake, Minnehaha, Moody	95 min
Jul 16, 9:53 PM MDT	Mesoscale Discussion	SPC	Brown, Day, Edmunds, Faulk, McPherson, Marshall and 1 more	67 min

Nearby

Mesoscale Discussions in South Dakota, 2016 Every mesoscale discussion in 2016

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.