Alert archive / Minnesota / Mesoscale Discussions in 2015

Mesoscale Discussion 916

June 6, 201517 counties in Minnesota; Richland County, North Dakota; 4 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2015, 7:44 PM CDT for 17 counties in Minnesota; Richland County, North Dakota; 4 counties in South Dakota. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Jun 6, 2015, 7:44 PM CDT (00:44 UTC)
Expired: Jun 6, 2015, 9:15 PM CDT
In force: 91 min
Issued by: the Storm Prediction Center

All 22 counties

Becker County, MN, Big Stone County, MN, Chippewa County, MN, Clay County, MN, Douglas County, MN, Grant County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Otter Tail County, MN, Pope County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Traverse County, MN, Wadena County, MN, Wilkin County, MN, Richland County, ND, Codington County, SD, Deuel County, SD, Grant County, SD, Roberts County, SD

The radar

The Aberdeen radar (KABR), 196 km from the middle of the area, began a volume at 00:46 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, 0.7 hours before the alert went out and 221 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: 673 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 1430 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 120 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 6, 8:11 PM CDT	Mesoscale Discussion	SPC	Nobles, Pipestone, Rock	64 min
Jun 6, 8:45 PM CDT	Tornado Watch	SPC	Cottonwood, Jackson, Lincoln, Lyon, Murray, Nobles and 2 more	4 hr
Jun 6, 10:24 PM CDT	Mesoscale Discussion	SPC	Chippewa, Kandiyohi, Lac qui Parle, Meeker, Morrison, Pope and 3 more	66 min
Jun 6, 11:00 PM CDT	Mesoscale Discussion	SPC	Cottonwood, Jackson, Murray, Nobles, Pipestone, Rock	2 hr

Nearby

Mesoscale Discussions in Minnesota, 2015 Mesoscale Discussions in South Dakota, 2015 Mesoscale Discussions in North Dakota, 2015 Every mesoscale discussion in 2015

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.