Alert archive / South Dakota / Mesoscale Discussions in 2012

Mesoscale Discussion 1214

June 18, 201213 counties in Minnesota; 18 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 18, 2012, 11:59 PM CDT for 13 counties in Minnesota; 18 counties in South Dakota. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Jun 18, 2012, 11:59 PM CDT (04:59 UTC)
Expired: Jun 19, 2012, 1:30 AM CDT
In force: 91 min
Issued by: the Storm Prediction Center

All 31 counties

Brown 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, Pipestone County, MN, Redwood County, MN, Renville County, MN, Swift County, MN, Yellow Medicine County, MN, Beadle County, SD, Brookings County, SD, Brown County, SD, Clark County, SD, Codington County, SD, Day County, SD, Deuel County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Hamlin County, SD, Kingsbury County, SD, Lake County, SD, Miner County, SD, Moody County, SD, Potter County, SD, Spink County, SD, Walworth County, SD

The radar

The Aberdeen radar (KABR), 78 km from the middle of the area, began a volume at 05:02 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, 5.0 hours before the alert went out and 52 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: 3093 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 233 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
Jun 18, 9:11 PM CDT	Mesoscale Discussion	SPC	Blue Earth, Brown, Chippewa, Cottonwood, Jackson, Lac qui Parle and 13 more	94 min
Jun 18, 10:08 PM CDT	Severe Thunderstorm Watch	SPC	Big Stone, Blue Earth, Brown, Chippewa, Cottonwood, Douglas and 20 more	8 hr
Jun 19, 2:39 AM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Big Stone, Blue Earth, Brown, Carver and 45 more	66 min
Jun 19, 3:25 AM CDT	Severe Thunderstorm Watch	SPC	Anoka, Carver, Dakota, Goodhue, Hennepin, Le Sueur and 6 more	5 hr
Jun 19, 4:16 AM CDT	Mesoscale Discussion	SPC	Anoka, Dakota, Goodhue, Hennepin, Le Sueur, Ramsey and 4 more	89 min
Jun 19, 4:56 PM CDT	Mesoscale Discussion	SPC	Becker, Benton, Big Stone, Crow Wing, Douglas, Grant and 11 more	94 min
Jun 19, 5:35 PM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Becker, Beltrami, Carlton, Cass, Clay and 14 more	7 hr
Jun 19, 6:08 PM CDT	Tornado Watch	SPC	Anoka, Benton, Big Stone, Chippewa, Chisago, Douglas and 18 more	7 hr

Nearby

Mesoscale Discussions in South Dakota, 2012 Mesoscale Discussions in Minnesota, 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.