Alert archive / South Dakota / Mesoscale Discussions in 2012

Mesoscale Discussion 1224

June 19, 20124 states

The Storm Prediction Center issued this mesoscale discussion at Jun 19, 2012, 4:56 PM CDT for 4 states. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Jun 19, 2012, 4:56 PM CDT (21:56 UTC)
Expired: Jun 19, 2012, 6:30 PM CDT
In force: 94 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 42 counties

Becker County, MN, Benton County, MN, Big Stone County, MN, Crow Wing County, MN, Douglas County, MN, Grant County, MN, Lac qui Parle County, MN, Morrison County, MN, Otter Tail County, MN, Pope County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Traverse County, MN, Wadena County, MN, Wilkin County, MN, Ransom County, ND, Richland County, ND, Sargent County, ND, Boyd County, NE, Aurora County, SD, Beadle County, SD, Brookings County, SD, Brown County, SD, Charles Mix County, SD, Clark County, SD, Codington County, SD, Davison County, SD, Day County, SD, Deuel County, SD, Douglas County, SD, Grant County, SD, Hamlin County, SD, Hanson County, SD, Kingsbury County, SD, Lake County, SD, Marshall County, SD, Miner County, SD, Roberts County, SD, Sanborn County, SD, Spink County, SD

The radar

The Aberdeen radar (KABR), 111 km from the middle of the area, began a volume at 21:58 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, 9.9 hours before the alert went out and 273 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: 7 J/kg
Mixed-layer CIN: -417 J/kg
Mixed-layer LCL: 1142 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 199 m²/s²
0-3 km storm-relative helicity: 345 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.2

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 18, 11:59 PM CDT	Mesoscale Discussion	SPC	Brown, Chippewa, Kandiyohi, Lac qui Parle, Lincoln, Lyon and 7 more	91 min
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, 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
Jun 19, 4:54 PM CDT	Mesoscale Discussion	SPC	Antelope, Arthur, Blaine, Boyd, Brown, Buffalo and 25 more	96 min

Nearby

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