Alert archive / Minnesota / Mesoscale Discussions in 2007

Mesoscale Discussion 1186

June 18, 200720 counties in Minnesota; Bayfield County, Douglas County, Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 18, 2007, 12:44 AM CDT for 20 counties in Minnesota; Bayfield County, Douglas County, Wisconsin. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: Jun 18, 2007, 12:44 AM CDT (05:44 UTC)
Expired: Jun 18, 2007, 1:45 AM CDT
In force: 61 min
Issued by: the Storm Prediction Center

All 22 counties

Aitkin County, MN, Beltrami County, MN, Benton County, MN, Carlton County, MN, Cass County, MN, Clearwater County, MN, Crow Wing County, MN, Hubbard County, MN, Isanti County, MN, Itasca County, MN, Kanabec County, MN, Koochiching County, MN, Lake County, MN, Lake of the Woods County, MN, Mille Lacs County, MN, Morrison County, MN, Pine County, MN, Saint Louis County, MN, Todd County, MN, Wadena County, MN, Bayfield County, WI, Douglas County, WI

The radar

The Duluth radar (KDLH), 178 km from the middle of the area, began a volume at 05:45 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.

Severe Thunderstorm Watch 414Jun 18, 1:00 AM CDT

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 5.7 hours before the alert went out and 113 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: 573 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 326 m²/s²
0-3 km storm-relative helicity: 494 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.4

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 17, 7:59 PM CDT	Mesoscale Discussion	SPC	Beltrami, Clay, Clearwater, Itasca, Kittson, Koochiching and 9 more	91 min
Jun 17, 10:43 PM CDT	Mesoscale Discussion	SPC	Becker, Big Stone, Clay, Clearwater, Grant, Kittson and 9 more	62 min
Jun 18, 12:03 AM CDT	Severe Thunderstorm Watch	SPC	Becker, Beltrami, Clay, Clearwater, Grant, Hubbard and 12 more	3 hr
Jun 18, 1:09 AM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Cass, Crow Wing, Itasca, Koochiching	3 hr
Jun 18, 12:46 PM CDT	Severe Thunderstorm Watch	SPC	Dodge, Fillmore, Goodhue, Houston, Mower, Olmsted and 2 more	7 hr
Jun 18, 3:27 PM CDT	Mesoscale Discussion	SPC	Fillmore, Houston, Mower, Olmsted, Wabasha, Winona	93 min
Jun 18, 11:06 AM CDT	Mesoscale Discussion	SPC	Ashland, Barron, Bayfield, Chippewa, Clark, Dunn and 21 more	54 min
Jun 18, 6:19 PM CDT	Mesoscale Discussion	SPC	Brown, Calumet, Fond du Lac, Green Lake, Kewaunee, Marinette and 8 more	86 min

Nearby

Mesoscale Discussions in Minnesota, 2007 Mesoscale Discussions in Wisconsin, 2007 Every mesoscale discussion in 2007

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.