Alert archive / Minnesota / Mesoscale Discussions in 2017

Mesoscale Discussion 1116

June 21, 201711 counties in Minnesota; Roberts County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 21, 2017, 9:07 PM CDT for 11 counties in Minnesota; Roberts County, South Dakota. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Jun 21, 2017, 9:07 PM CDT (02:07 UTC)
Expired: Jun 21, 2017, 10:00 PM CDT
In force: 53 min
Issued by: the Storm Prediction Center

Counties Beltrami County, MN, Big Stone County, MN, Cass County, MN, Clearwater County, MN, Douglas County, MN, Grant County, MN, Hubbard County, MN, Otter Tail County, MN, Stevens County, MN, Traverse County, MN, Wadena County, MN, Roberts County, SD

The radar

The Fargo/Grand Forks radar (KMVX), 161 km from the middle of the area, began a volume at 02:09 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

Minneapolis, MN (KMPX), launched 00:00Z, 2.1 hours before the alert went out and 252 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: 1414 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 205 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 21, 7:25 PM CDT	Mesoscale Discussion	SPC	Becker, Beltrami, Big Stone, Cass, Chippewa, Clay and 23 more	2 hr
Jun 22, 3:11 AM CDT	Mesoscale Discussion	SPC	Blue Earth, Brown, Chippewa, Cottonwood, Kandiyohi, Lac qui Parle and 14 more	64 min
Jun 22, 9:28 AM CDT	Mesoscale Discussion	SPC	Blue Earth, Dodge, Faribault, Fillmore, Freeborn, Houston and 6 more	92 min

Nearby

Mesoscale Discussions in Minnesota, 2017 Mesoscale Discussions in South Dakota, 2017 Every mesoscale discussion in 2017

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.