Alert archive / Minnesota / Mesoscale Discussions in 2018

Mesoscale Discussion 926

June 28, 201813 counties in Minnesota; Grand Forks County, Traill County, North Dakota; Douglas County, Sawyer County, Washburn County, Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 28, 2018, 5:23 PM CDT for 13 counties in Minnesota; Grand Forks County, Traill County, North Dakota; Douglas County, Sawyer County, Washburn County, Wisconsin. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: Jun 28, 2018, 5:23 PM CDT (22:23 UTC)
Expired: Jun 28, 2018, 7:00 PM CDT
In force: 97 min
Issued by: the Storm Prediction Center

Counties Aitkin County, MN, Becker County, MN, Carlton County, MN, Cass County, MN, Clay County, MN, Clearwater County, MN, Crow Wing County, MN, Hubbard County, MN, Mahnomen County, MN, Norman County, MN, Pine County, MN, Polk County, MN, Wadena County, MN, Grand Forks County, ND, Traill County, ND, Douglas County, WI, Sawyer County, WI, Washburn County, WI

The radar

The Fargo/Grand Forks radar (KMVX), 185 km from the middle of the area, began a volume at 22:23 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

International Fa, MN (KINL), launched 12:00Z, 10.4 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2670 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 204 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 28, 11:16 AM CDT	Mesoscale Discussion	SPC	Aitkin, Becker, Benton, Big Stone, Carlton, Cass and 20 more	89 min
Jun 28, 1:33 PM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Becker, Beltrami, Carlton, Cass, Clay and 14 more	6 hr
Jun 28, 3:53 PM CDT	Mesoscale Discussion	SPC	Aitkin, Becker, Beltrami, Carlton, Cass, Clay and 17 more	97 min
Jun 28, 3:52 AM CDT	Mesoscale Discussion	SPC	Barnes, Burleigh, Cass, Dickey, Emmons, Foster and 12 more	83 min
Jun 28, 7:40 AM CDT	Mesoscale Discussion	SPC	Adams, Barnes, Burleigh, Cass, Dickey, Emmons and 18 more	3 hr
Jun 28, 1:06 PM CDT	Mesoscale Discussion	SPC	Benson, Burleigh, Eddy, Foster, Grand Forks, Griggs and 8 more	114 min
Jun 28, 3:16 PM CDT	Tornado Watch	SPC	Adams, Barnes, Benson, Billings, Bowman, Burleigh and 31 more	8 hr
Jun 28, 3:35 PM CDT	Mesoscale Discussion	SPC	Billings, Bowman, Golden Valley, McKenzie, Slope	2 hr
Jun 28, 6:59 PM CDT	Mesoscale Discussion	SPC	Adams, Benson, Billings, Bowman, Burleigh, Dunn and 22 more	91 min

Nearby

Mesoscale Discussions in Minnesota, 2018 Mesoscale Discussions in Wisconsin, 2018 Mesoscale Discussions in North 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.