Alert archive / South Dakota / Mesoscale Discussions in 2019

Mesoscale Discussion 1027

June 8, 2019Big Stone County, Traverse County, Minnesota; 8 counties in Nebraska; 31 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2019, 3:47 PM CDT for Big Stone County, Traverse County, Minnesota; 8 counties in Nebraska; 31 counties in South Dakota. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: Jun 8, 2019, 3:47 PM CDT (20:47 UTC)
Expired: Jun 8, 2019, 5:15 PM CDT
In force: 88 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 41 counties

Big Stone County, MN, Traverse County, MN, Antelope County, NE, Boyd County, NE, Brown County, NE, Holt County, NE, Keya Paha County, NE, Knox County, NE, Pierce County, NE, Rock County, NE, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brookings County, SD, Brule County, SD, Charles Mix County, SD, Clark County, SD, Codington County, SD, Davison County, SD, Day County, SD, Deuel County, SD, Douglas County, SD, Grant County, SD, Gregory County, SD, Hamlin County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, Marshall County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Roberts County, SD, Sanborn County, SD, Spink County, SD, Turner County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 145 km from the middle of the area, began a volume at 20:47 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, 8.8 hours before the alert went out and 128 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: 149 J/kg
Mixed-layer CIN: -327 J/kg
Mixed-layer LCL: 1691 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 238 m²/s²
0-3 km storm-relative helicity: 235 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 8, 12:59 PM CDT	Mesoscale Discussion	SPC	Becker, Clay, Mahnomen, Norman, Otter Tail, Pennington and 3 more	2 hr
Jun 8, 1:24 PM CDT	Severe Thunderstorm Watch	SPC	Beltrami, Clay, Clearwater, Kittson, Lake of the Woods, Mahnomen and 7 more	5 hr
Jun 8, 4:56 PM CDT	Mesoscale Discussion	SPC	Becker, Beltrami, Clay, Clearwater, Lake of the Woods, Mahnomen and 8 more	94 min
Jun 8, 2:18 PM CDT	Mesoscale Discussion	SPC	Adams, Antelope, Arthur, Blaine, Boone, Boyd and 35 more	87 min
Jun 8, 2:51 PM CDT	Severe Thunderstorm Watch	SPC	Blaine, Buffalo, Chase, Custer, Dawson, Dundy and 21 more	7 hr
Jun 8, 5:51 PM CDT	Mesoscale Discussion	SPC	Blaine, Buffalo, Chase, Custer, Dawson, Dundy and 21 more	54 min
Jun 7, 7:24 PM CDT	Severe Thunderstorm Watch	SPC	Campbell, Corson, Dewey, Walworth	6 hr
Jun 7, 8:03 PM CDT	Mesoscale Discussion	SPC	Butte, Corson, Harding, Meade, Perkins, Ziebach	87 min
Jun 7, 11:19 PM CDT	Mesoscale Discussion	SPC	Campbell	56 min

Nearby

Mesoscale Discussions in South Dakota, 2019 Mesoscale Discussions in Nebraska, 2019 Mesoscale Discussions in Minnesota, 2019 Every mesoscale discussion in 2019

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.