Alert archive / Minnesota / Mesoscale Discussions in 2018

Mesoscale Discussion 1018

July 8, 2018Cook County, Lake County, Saint Louis County, Minnesota

The Storm Prediction Center issued this mesoscale discussion at Jul 8, 2018, 9:23 AM CDT for Cook County, Lake County, Saint Louis County, Minnesota. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: Jul 8, 2018, 9:23 AM CDT (14:23 UTC)
Expired: Jul 8, 2018, 11:00 AM CDT
In force: 97 min
Issued by: the Storm Prediction Center

Counties Cook County, MN, Lake County, MN, Saint Louis County, MN

The radar

The Duluth radar (KDLH), 217 km from the middle of the area, began a volume at 14:26 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, 2.4 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: 2692 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 748 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 225 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 7.0

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
Jul 8, 2:35 AM CDT	Mesoscale Discussion	SPC	Beltrami, Clearwater, Kittson, Lake of the Woods, Marshall, Norman and 4 more	85 min
Jul 8, 3:14 AM CDT	Severe Thunderstorm Watch	SPC	Beltrami, Clearwater, Kittson, Lake of the Woods, Marshall, Pennington and 3 more	5 hr
Jul 8, 5:30 AM CDT	Mesoscale Discussion	SPC	Beltrami, Clearwater, Itasca, Kittson, Koochiching, Lake of the Woods and 5 more	90 min
Jul 8, 6:59 AM CDT	Severe Thunderstorm Watch	SPC	Cook, Itasca, Koochiching, Lake, Saint Louis	4 hr
Jul 8, 1:16 PM CDT	Mesoscale Discussion	SPC	Becker, Beltrami, Clay, Clearwater, Hubbard, Mahnomen and 4 more	2 hr
Jul 8, 3:52 PM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Becker, Big Stone, Carlton, Cass, Clay and 15 more	7 hr
Jul 8, 5:46 PM CDT	Mesoscale Discussion	SPC	Aitkin, Becker, Benton, Big Stone, Carlton, Cass and 22 more	119 min

Nearby

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.