Alert archive / Minnesota / Mesoscale Discussions in 2013

Mesoscale Discussion 1039

June 12, 201317 counties in Minnesota; 6 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 12, 2013, 4:37 AM CDT for 17 counties in Minnesota; 6 counties in South Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 12, 2013, 4:37 AM CDT (09:37 UTC)
Expired: Jun 12, 2013, 7:00 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 23 counties

Big Stone County, MN, Chippewa County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Lincoln County, MN, Lyon County, MN, McLeod County, MN, Meeker County, MN, Pope County, MN, Redwood County, MN, Renville County, MN, Sibley County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Traverse County, MN, Yellow Medicine County, MN, Brookings County, SD, Codington County, SD, Deuel County, SD, Grant County, SD, Hamlin County, SD, Roberts County, SD

The radar

The Sioux Falls radar (KFSD), 155 km from the middle of the area, began a volume at 09:39 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

Aberdeen, SD (KABR), launched 00:00Z, 9.6 hours before the alert went out and 176 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: 3031 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: -18 m²/s²
0-3 km storm-relative helicity: 194 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

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 11, 11:12 PM CDT	Mesoscale Discussion	SPC	Jackson, Murray, Nobles, Rock	2 hr
Jun 12, 12:49 PM CDT	Mesoscale Discussion	SPC	Fillmore	56 min
Jun 12, 1:49 PM CDT	Tornado Watch PDS	SPC	Fillmore, Houston, Mower	9 hr
Jun 12, 4:06 PM CDT	Mesoscale Discussion	SPC	Fillmore, Freeborn, Mower	54 min
Jun 12, 6:40 PM CDT	Mesoscale Discussion	SPC	Fillmore, Freeborn, Houston, Mower, Winona	95 min
Jun 11, 7:23 PM CDT	Mesoscale Discussion	SPC	Butte, Custer, Fall River, Harding, Jackson, Lawrence and 3 more	97 min
Jun 11, 7:42 PM CDT	Severe Thunderstorm Watch	SPC	Bennett, Butte, Custer, Haakon, Jackson, Lawrence and 3 more	5 hr
Jun 11, 9:16 PM CDT	Mesoscale Discussion	SPC	Bennett, Butte, Custer, Fall River, Haakon, Jackson and 5 more	59 min
Jun 11, 10:48 PM CDT	Mesoscale Discussion	SPC	Bennett, Custer, Dewey, Haakon, Hughes, Jackson and 11 more	87 min

Nearby

Mesoscale Discussions in Minnesota, 2013 Mesoscale Discussions in South Dakota, 2013 Every mesoscale discussion in 2013

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.