Alert archive / North Dakota / Mesoscale Discussions in 2018

Mesoscale Discussion 669

June 7, 201815 counties in North Dakota; Harding County, Perkins County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 7, 2018, 9:04 PM MDT for 15 counties in North Dakota; Harding County, Perkins County, South Dakota. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Jun 7, 2018, 9:04 PM MDT (03:04 UTC)
Expired: Jun 7, 2018, 10:30 PM MDT
In force: 86 min
Issued by: the Storm Prediction Center

Counties Adams County, ND, Billings County, ND, Bowman County, ND, Burke County, ND, Divide County, ND, Dunn County, ND, Grant County, ND, Hettinger County, ND, McKenzie County, ND, Mercer County, ND, Morton County, ND, Mountrail County, ND, Slope County, ND, Stark County, ND, Williams County, ND, Harding County, SD, Perkins County, SD

The radar

The Minot AFB radar (KMBX), 180 km from the middle of the area, began a volume at 03:07 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, 3.1 hours before the alert went out and 229 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: 53 J/kg
Mixed-layer CIN: -212 J/kg
Mixed-layer LCL: 1580 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 70 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 7, 6:09 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Billings, Bowman, Divide, Dunn, Golden Valley and 5 more	7 hr
Jun 8, 12:06 PM MDT	Mesoscale Discussion	SPC	Barnes, Cass, Grand Forks, Griggs, LaMoure, Ransom and 2 more	84 min
Jun 8, 1:01 PM MDT	Mesoscale Discussion	SPC	Bennett, Butte, Custer, Fall River, Jackson, Lawrence and 3 more	119 min
Jun 8, 1:39 PM MDT	Severe Thunderstorm Watch	SPC	Bennett, Butte, Custer, Fall River, Haakon, Harding and 7 more	8 hr
Jun 8, 4:02 PM MDT	Mesoscale Discussion	SPC	Bennett, Gregory, Haakon, Jackson, Jones, Mellette and 3 more	88 min
Jun 8, 4:55 PM MDT	Severe Thunderstorm Watch	SPC	Aurora, Brule, Buffalo, Charles Mix, Davison, Douglas and 15 more	7 hr

Nearby

Mesoscale Discussions in North Dakota, 2018 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.