Alert archive / Minnesota / Mesoscale Discussions in 2011

Mesoscale Discussion 1961

August 12, 201132 counties in Minnesota; Richland County, North Dakota; Deuel County, Grant County, Roberts County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 12, 2011, 7:09 PM CDT for 32 counties in Minnesota; Richland County, North Dakota; Deuel County, Grant County, Roberts County, South Dakota. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Aug 12, 2011, 7:09 PM CDT (00:09 UTC)
Expired: Aug 12, 2011, 8:45 PM CDT
In force: 96 min
Issued by: the Storm Prediction Center

All 36 counties

Becker County, MN, Beltrami County, MN, Benton County, MN, Big Stone County, MN, Cass County, MN, Chippewa County, MN, Clay County, MN, Clearwater County, MN, Crow Wing County, MN, Douglas County, MN, Grant County, MN, Hubbard County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Mahnomen County, MN, Meeker County, MN, Morrison County, MN, Norman County, MN, Otter Tail County, MN, Pennington County, MN, Polk County, MN, Pope County, MN, Red Lake County, MN, Renville County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Traverse County, MN, Wadena County, MN, Wilkin County, MN, Yellow Medicine County, MN, Richland County, ND, Deuel County, SD, Grant County, SD, Roberts County, SD

The radar

The Fargo/Grand Forks radar (KMVX), 195 km from the middle of the area, began a volume at 00:10 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 00:00Z, 0.2 hours before the alert went out and 219 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: 225 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 1194 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 68 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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Nearby

Mesoscale Discussions in Minnesota, 2011 Mesoscale Discussions in South Dakota, 2011 Mesoscale Discussions in North Dakota, 2011 Every mesoscale discussion in 2011

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.