Alert archive / South Dakota / Mesoscale Discussions in 2018

Mesoscale Discussion 616

June 1, 201828 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 1, 2018, 6:32 PM CDT for 28 counties in South Dakota. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: Jun 1, 2018, 6:32 PM CDT (23:32 UTC)
Expired: Jun 1, 2018, 8:00 PM CDT
In force: 88 min
Issued by: the Storm Prediction Center

All 28 counties

Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brule County, SD, Buffalo County, SD, Campbell County, SD, Charles Mix County, SD, Corson County, SD, Davison County, SD, Dewey County, SD, Douglas County, SD, Edmunds County, SD, Faulk County, SD, Gregory County, SD, Haakon County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jerauld County, SD, Jones County, SD, Lyman County, SD, McPherson County, SD, Potter County, SD, Sanborn County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD, Ziebach County, SD

The radar

The Aberdeen radar (KABR), 181 km from the middle of the area, began a volume at 23:35 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 12:00Z, 11.5 hours before the alert went out and 150 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1621 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 192 m²/s²
0-3 km storm-relative helicity: 255 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
Jun 1, 12:45 PM CDT	Severe Thunderstorm Watch	SPC	Butte, Harding, Lawrence, Meade, Perkins	6 hr
Jun 1, 2:13 PM CDT	Mesoscale Discussion	SPC	Campbell, Corson, Dewey, Haakon, Jones, Mellette and 5 more	2 hr
Jun 1, 2:53 PM CDT	Severe Thunderstorm Watch	SPC	Aurora, Bon Homme, Brule, Buffalo, Campbell, Charles Mix and 22 more	7 hr
Jun 1, 4:04 PM CDT	Mesoscale Discussion	SPC	Butte, Custer, Harding, Lawrence	86 min

Nearby

Mesoscale Discussions in South Dakota, 2018 Every mesoscale discussion in 2018

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.