Alert archive / Minnesota / Mesoscale Discussions in 2008

Mesoscale Discussion 2468

December 14, 20088 counties in Minnesota; Ashland County, Bayfield County, Douglas County, Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Dec 14, 2008, 11:23 AM CST for 8 counties in Minnesota; Ashland County, Bayfield County, Douglas County, Wisconsin. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: Dec 14, 2008, 11:23 AM CST (17:23 UTC)
Expired: Dec 14, 2008, 3:00 PM CST
In force: 4 hr
Issued by: the Storm Prediction Center

Counties Aitkin County, MN, Carlton County, MN, Cass County, MN, Cook County, MN, Itasca County, MN, Koochiching County, MN, Lake County, MN, Saint Louis County, MN, Ashland County, WI, Bayfield County, WI, Douglas County, WI

The radar

The Duluth radar (KDLH), 78 km from the middle of the area, began a volume at 17:28 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

Minneapolis, MN (KMPX), launched 12:00Z, 5.4 hours before the alert went out and 324 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: 538 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 162 m²/s²
0-3 km storm-relative helicity: 261 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Dec 14, 12:07 AM CST	Mesoscale Discussion	SPC	Big Stone, Grant, Lac qui Parle, Lincoln, Pipestone, Stevens and 2 more	4 hr
Dec 14, 5:25 AM CST	Mesoscale Discussion	SPC	Aitkin, Becker, Beltrami, Benton, Big Stone, Cass and 33 more	5 hr
Dec 14, 12:02 PM CST	Mesoscale Discussion	SPC	Becker, Big Stone, Chippewa, Clay, Grant, Lac qui Parle and 15 more	4 hr

Nearby

Mesoscale Discussions in Minnesota, 2008 Mesoscale Discussions in Wisconsin, 2008 Every mesoscale discussion in 2008

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.