Alert archive / South Dakota / Mesoscale Discussions in 2011
Mesoscale Discussion 1199
The Storm Prediction Center issued this mesoscale discussion at Jun 12, 2011, 7:07 PM CDT for 22 counties in South Dakota. It was in force for 53 min.
The area
The outline as issued.
The facts
- Issued
- Jun 12, 2011, 7:07 PM CDT (00:07 UTC)
- Expired
- Jun 12, 2011, 8:00 PM CDT
- In force
- 53 min
- Issued by
- the Storm Prediction Center
All 22 counties
Brown County, SD, Buffalo County, SD, Corson County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Haakon County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jackson County, SD, Jones County, SD, Lyman County, SD, Mellette County, SD, Oglala Lakota County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Todd County, SD, Tripp County, SD, Walworth County, SD, Ziebach County, SD
The radar
The Rapid City radar (KUDX), 150 km from the middle of the area, began a volume at 00:08 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
Aberdeen, SD (KABR), launched 00:00Z, 0.1 hours before the alert went out and 215 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
- 70 J/kg
- Mixed-layer CIN
- -309 J/kg
- Mixed-layer LCL
- 1253 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 117 m²/s²
- 0-3 km storm-relative helicity
- 192 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 12, 7:33 PM CDT | Severe Thunderstorm Watch | SPC | Buffalo, Campbell, Corson, Dewey, Haakon, Hughes and 12 more | 6 hr |
| Jun 12, 9:55 PM CDT | Mesoscale Discussion | SPC | Bennett, Campbell, Corson, Dewey, Haakon, Hughes and 11 more | 65 min |
| Jun 13, 1:44 AM CDT | Mesoscale Discussion | SPC | Jones, Lyman, Mellette, Todd, Tripp | 61 min |
| Jun 13, 2:53 PM CDT | Mesoscale Discussion | SPC | Lyman, Mellette, Todd, Tripp | 2 hr |
| Jun 13, 5:24 PM CDT | Severe Thunderstorm Watch | SPC | Bennett, Fall River, Jackson, Mellette, Todd, Tripp | 7 hr |
Nearby
Mesoscale Discussions in South Dakota, 2011Every mesoscale discussion in 2011
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.