Alert archive / Wisconsin / Mesoscale Discussions in 2018

Mesoscale Discussion 951

June 30, 20188 counties in Michigan; 8 counties in Minnesota; 19 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 30, 2018, 4:21 AM EDT for 8 counties in Michigan; 8 counties in Minnesota; 19 counties in Wisconsin. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued: Jun 30, 2018, 4:21 AM EDT (08:21 UTC)
Expired: Jun 30, 2018, 6:15 AM EDT
In force: 114 min
Issued by: the Storm Prediction Center

All 35 counties

Baraga County, MI, Dickinson County, MI, Gogebic County, MI, Houghton County, MI, Iron County, MI, Keweenaw County, MI, Marquette County, MI, Ontonagon County, MI, Aitkin County, MN, Carlton County, MN, Cook County, MN, Itasca County, MN, Kanabec County, MN, Lake County, MN, Pine County, MN, Saint Louis County, MN, Ashland County, WI, Barron County, WI, Bayfield County, WI, Burnett County, WI, Douglas County, WI, Florence County, WI, Forest County, WI, Iron County, WI, Langlade County, WI, Lincoln County, WI, Marinette County, WI, Oneida County, WI, Polk County, WI, Price County, WI, Rusk County, WI, Sawyer County, WI, Taylor County, WI, Vilas County, WI, Washburn County, WI

The radar

The Duluth radar (KDLH), 89 km from the middle of the area, began a volume at 08:23 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 00:00Z, 8.4 hours before the alert went out and 264 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: 948 J/kg
Mixed-layer CIN: -354 J/kg
Mixed-layer LCL: 565 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: -30 m²/s²
0-3 km storm-relative helicity: 125 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 30, 5:23 PM EDT	Mesoscale Discussion	SPC	Baraga, Dickinson, Gogebic, Houghton, Iron, Marquette and 2 more	67 min
Jun 30, 5:41 PM EDT	Severe Thunderstorm Watch	SPC	Alger, Baraga, Delta, Dickinson, Gogebic, Houghton and 5 more	6 hr
Jun 29, 11:57 PM EDT	Mesoscale Discussion	SPC	Aitkin, Benton, Big Stone, Carlton, Cass, Chippewa and 16 more	63 min
Jun 30, 12:56 AM EDT	Severe Thunderstorm Watch	SPC	Aitkin, Benton, Carlton, Cass, Chippewa, Cook and 19 more	5 hr
Jun 30, 1:40 PM EDT	Mesoscale Discussion	SPC	Dodge, Faribault, Fillmore, Freeborn, Martin, Mower and 3 more	3 hr
Jun 30, 2:39 PM EDT	Severe Thunderstorm Watch	SPC	Blue Earth, Dakota, Dodge, Faribault, Fillmore, Freeborn and 13 more	7 hr
Jun 30, 4:40 PM EDT	Mesoscale Discussion	SPC	Dodge, Fillmore, Freeborn, Goodhue, Houston, Mower and 4 more	2 hr

Nearby

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