Alert archive / Minnesota / Mesoscale Discussions in 2017

Mesoscale Discussion 963

June 7, 201711 counties in Minnesota; Grand Forks County, Traill County, Walsh County, North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 7, 2017, 1:36 PM CDT for 11 counties in Minnesota; Grand Forks County, Traill County, Walsh County, North Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 7, 2017, 1:36 PM CDT (18:36 UTC)
Expired: Jun 7, 2017, 4:00 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Becker County, MN, Beltrami County, MN, Clay County, MN, Clearwater County, MN, Hubbard County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Grand Forks County, ND, Traill County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 71 km from the middle of the area, began a volume at 18:39 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Tornado Watch 306Jun 7, 2:10 PM CDT

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 6.6 hours before the alert went out and 249 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: 2122 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 118 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, 2:11 PM CDT	Tornado Watch	SPC	Becker, Clay, Clearwater, Hubbard, Mahnomen, Marshall and 7 more	4 hr
Jun 7, 5:30 PM CDT	Mesoscale Discussion	SPC	Becker, Clearwater, Hubbard, Mahnomen, Norman, Otter Tail and 4 more	60 min

Nearby

Mesoscale Discussions in Minnesota, 2017 Mesoscale Discussions in North 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.