Alert archive / Minnesota / Mesoscale Discussions in 2006

Mesoscale Discussion 1809

August 12, 20068 counties in Minnesota

The Storm Prediction Center issued this mesoscale discussion at Aug 12, 2006, 6:06 PM CDT for 8 counties in Minnesota. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Aug 12, 2006, 6:06 PM CDT (23:06 UTC)
Expired: Aug 12, 2006, 7:30 PM CDT
In force: 84 min
Issued by: the Storm Prediction Center

Counties Beltrami County, MN, Cass County, MN, Clearwater County, MN, Hubbard County, MN, Itasca County, MN, Koochiching County, MN, Lake of the Woods County, MN, Wadena County, MN

The radar

The Duluth radar (KDLH), 158 km from the middle of the area, began a volume at 23:05 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, 11.1 hours before the alert went out and 128 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: 3 J/kg
Mixed-layer CIN: -325 J/kg
Mixed-layer LCL: 751 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 100 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
Aug 12, 3:13 AM CDT	Mesoscale Discussion	SPC	Clay, Kittson, Marshall, Norman, Polk	62 min
Aug 12, 2:37 PM CDT	Mesoscale Discussion	SPC	Clay, Marshall, Norman, Pennington, Polk, Red Lake and 1 more	83 min
Aug 12, 2:56 PM CDT	Tornado Watch	SPC	Becker, Big Stone, Chippewa, Clay, Douglas, Grant and 15 more	5 hr

Nearby

Mesoscale Discussions in Minnesota, 2006 Every mesoscale discussion in 2006

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.