Alert archive / South Dakota / Mesoscale Discussions in 2016

Mesoscale Discussion 1535

August 14, 20166 counties in Nebraska; 32 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 14, 2016, 9:04 PM CDT for 6 counties in Nebraska; 32 counties in South Dakota. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued: Aug 14, 2016, 9:04 PM CDT (02:04 UTC)
Expired: Aug 14, 2016, 10:00 PM CDT
In force: 56 min
Issued by: the Storm Prediction Center

All 38 counties

Boyd County, NE, Brown County, NE, Cherry County, NE, Holt County, NE, Keya Paha County, NE, Rock County, NE, Aurora County, SD, Bennett County, SD, Brule County, SD, Buffalo County, SD, Butte County, SD, Campbell County, SD, Charles Mix County, SD, Corson County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Gregory County, SD, Haakon County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jackson County, SD, Jerauld County, SD, Jones County, SD, Lawrence County, SD, Lyman County, SD, Meade County, SD, Mellette County, SD, Pennington County, SD, Perkins 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), 125 km from the middle of the area, began a volume at 02:04 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, 2.1 hours before the alert went out and 238 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: 2 J/kg
Mixed-layer CIN: -193 J/kg
Mixed-layer LCL: 2017 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 150 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Aug 15, 3:30 PM CDT	Mesoscale Discussion	SPC	Dawes, Sheridan, Sioux	90 min

Nearby

Mesoscale Discussions in South Dakota, 2016 Mesoscale Discussions in Nebraska, 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.