Alert archive / Minnesota / Mesoscale Discussions in 2012

Mesoscale Discussion 1162

June 14, 20126 counties in Iowa; 25 counties in Minnesota; Lincoln County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 14, 2012, 1:44 PM CDT for 6 counties in Iowa; 25 counties in Minnesota; Lincoln County, South Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 14, 2012, 1:44 PM CDT (18:44 UTC)
Expired: Jun 14, 2012, 3:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 32 counties

Dickinson County, IA, Emmet County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Sioux County, IA, Blue Earth County, MN, Brown County, MN, Chippewa County, MN, Cottonwood County, MN, Faribault County, MN, Jackson County, MN, Kandiyohi County, MN, Le Sueur County, MN, Lincoln County, MN, Lyon County, MN, Martin County, MN, McLeod County, MN, Meeker County, MN, Murray County, MN, Nicollet County, MN, Nobles County, MN, Pipestone County, MN, Redwood County, MN, Renville County, MN, Rock County, MN, Sibley County, MN, Swift County, MN, Waseca County, MN, Watonwan County, MN, Yellow Medicine County, MN, Lincoln County, SD

The radar

The Sioux Falls radar (KFSD), 136 km from the middle of the area, began a volume at 18:46 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.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 6.7 hours before the alert went out and 151 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: 1268 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 475 m²/s²
0-3 km storm-relative helicity: 442 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

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 14, 3:27 PM CDT	Severe Thunderstorm Watch	SPC	Audubon, Buena Vista, Calhoun, Carroll, Cass, Cerro Gordo and 31 more	8 hr
Jun 14, 6:07 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Calhoun, Carroll, Cass and 15 more	83 min
Jun 13, 10:53 PM CDT	Severe Thunderstorm Watch	SPC	Clay, Norman, Traverse, Wilkin	5 hr
Jun 14, 3:01 AM CDT	Mesoscale Discussion	SPC	Big Stone, Douglas, Grant, Otter Tail, Pope, Stevens and 2 more	89 min
Jun 14, 7:37 AM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Carver, Chisago, Dakota, Hennepin and 9 more	113 min
Jun 14, 2:31 PM CDT	Mesoscale Discussion	SPC	Clay, Marshall, Norman, Pennington, Polk, Red Lake and 1 more	89 min
Jun 14, 2:45 PM CDT	Severe Thunderstorm Watch	SPC	Blue Earth, Brown, Carver, Cottonwood, Dakota, Dodge and 22 more	7 hr
Jun 13, 9:34 PM CDT	Mesoscale Discussion	SPC	Brown, Campbell, Corson, Dewey, Edmunds, McPherson and 3 more	86 min

Nearby

Mesoscale Discussions in Minnesota, 2012 Mesoscale Discussions in Iowa, 2012 Mesoscale Discussions in South Dakota, 2012 Every mesoscale discussion in 2012

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.