Alert archive / South Dakota / Mesoscale Discussions in 2020

Mesoscale Discussion 1047

June 28, 20204 counties in North Dakota; 8 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 28, 2020, 11:16 PM CDT for 4 counties in North Dakota; 8 counties in South Dakota. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: Jun 28, 2020, 11:16 PM CDT (04:16 UTC)
Expired: Jun 29, 2020, 1:15 AM CDT
In force: 119 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 316...317

Counties Emmons County, ND, Kidder County, ND, Logan County, ND, McIntosh County, ND, Campbell County, SD, Dewey County, SD, Haakon County, SD, Jones County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD

The radar

The Bismarck radar (KBIS), 178 km from the middle of the area, began a volume at 04:20 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

Bismarck Municip, ND (KBIS), launched 00:00Z, 4.3 hours before the alert went out and 178 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: 1238 J/kg
Mixed-layer CIN: -112 J/kg
Mixed-layer LCL: 2065 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.1

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 28, 9:55 PM CDT	Severe Thunderstorm Watch	SPC	Burleigh, Emmons, Kidder, Logan, McIntosh, Morton and 3 more	3 hr
Jun 29, 3:44 PM CDT	Mesoscale Discussion	SPC	Billings, Bowman, Dunn, Golden Valley, Hettinger, McKenzie and 4 more	2 hr
Jun 29, 4:56 PM CDT	Tornado Watch	SPC	Adams, Billings, Bowman, Burke, Divide, Dunn and 11 more	8 hr
Jun 28, 8:09 PM CDT	Mesoscale Discussion	SPC	Campbell, Corson, Dewey, Perkins, Potter, Walworth and 1 more	66 min
Jun 28, 8:55 PM CDT	Severe Thunderstorm Watch	SPC	Campbell, Corson, Dewey, Edmunds, Faulk, Hughes and 6 more	6 hr

Nearby

Mesoscale Discussions in South Dakota, 2020 Mesoscale Discussions in North Dakota, 2020 Every mesoscale discussion in 2020

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.