Alert archive / South Dakota / Mesoscale Discussions in 2012
Mesoscale Discussion 1230
The Storm Prediction Center issued this mesoscale discussion at Jun 20, 2012, 4:00 AM CDT for Lac qui Parle County, Minnesota; 14 counties in Nebraska; 16 counties in South Dakota. It was in force for 60 min.
The area
The outline as issued.
The facts
- Issued
- Jun 20, 2012, 4:00 AM CDT (09:00 UTC)
- Expired
- Jun 20, 2012, 5:00 AM CDT
- In force
- 60 min
- Issued by
- the Storm Prediction Center
All 31 counties
Lac qui Parle County, MN, Arthur County, NE, Blaine County, NE, Boyd County, NE, Brown County, NE, Cherry County, NE, Garden County, NE, Grant County, NE, Holt County, NE, Hooker County, NE, Keya Paha County, NE, Loup County, NE, Rock County, NE, Sheridan County, NE, Thomas County, NE, Aurora County, SD, Beadle County, SD, Brookings County, SD, Brule County, SD, Charles Mix County, SD, Davison County, SD, Deuel County, SD, Douglas County, SD, Gregory County, SD, Hamlin County, SD, Hanson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Miner County, SD, Sanborn County, SD
The radar
The North Platte radar (KLNX), 170 km from the middle of the area, began a volume at 09:02 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, 9.0 hours before the alert went out and 204 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.
- Mixed-layer CAPE
- 322 J/kg
- Mixed-layer CIN
- -368 J/kg
- Mixed-layer LCL
- 663 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 206 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 7.2
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 7:01 PM CDT | Severe Thunderstorm Watch | SPC | Cottonwood, Jackson, Lincoln, Lyon, Murray, Nobles and 2 more | 7 hr |
| Jun 19, 9:12 PM CDT | Mesoscale Discussion | SPC | Anoka, Benton, Big Stone, Chippewa, Chisago, Douglas and 22 more | 93 min |
| Jun 19, 9:17 PM CDT | Mesoscale Discussion | SPC | Aitkin, Becker, Cass, Clay, Crow Wing, Hubbard and 7 more | 88 min |
| Jun 19, 11:20 PM CDT | Severe Thunderstorm Watch | SPC | Big Stone, Traverse | 5 hr |
| Jun 19, 11:37 PM CDT | Mesoscale Discussion | SPC | Aitkin, Benton, Big Stone, Carlton, Cass, Chippewa and 22 more | 83 min |
| Jun 20, 5:27 AM CDT | Mesoscale Discussion | SPC | Aitkin, Carlton, Crow Wing, Mille Lacs, Morrison | 2 hr |
| Jun 20, 9:40 AM CDT | Mesoscale Discussion | SPC | Anoka, Benton, Chisago, Isanti, Kanabec, Mille Lacs and 3 more | 95 min |
| Jun 20, 2:10 PM CDT | Mesoscale Discussion | SPC | Blue Earth, Dakota, Dodge, Faribault, Fillmore, Freeborn and 11 more | 95 min |
| Jun 19, 8:50 PM CDT | Mesoscale Discussion | SPC | Arthur, Box Butte, Cherry, Dawes, Garden, Grant and 7 more | 85 min |
| Jun 19, 11:59 PM CDT | Mesoscale Discussion | SPC | Box Butte, Dawes, Garden, Grant, Morrill, Sheridan | 91 min |
| Jun 20, 12:57 AM CDT | Severe Thunderstorm Watch | SPC | Blaine, Boyd, Brown, Cherry, Garden, Grant and 7 more | 3 hr |
| Jun 20, 3:24 PM CDT | Mesoscale Discussion | SPC | Adams, Burt, Butler, Cass, Clay, Dodge and 21 more | 96 min |
Nearby
Mesoscale Discussions in South Dakota, 2012Mesoscale Discussions in Nebraska, 2012Mesoscale Discussions in Minnesota, 2012Every 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.