Alert archive / South Dakota / Mesoscale Discussions in 2007
Mesoscale Discussion 2010
The Storm Prediction Center issued this mesoscale discussion at Sep 23, 2007, 5:29 PM MDT for 5 counties in Nebraska; 8 counties in North Dakota; 16 counties in South Dakota. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- Sep 23, 2007, 5:29 PM MDT (23:29 UTC)
- Expired
- Sep 23, 2007, 7:00 PM MDT
- In force
- 91 min
- Issued by
- the Storm Prediction Center
All 29 counties
Barnes County, ND, Dickey County, ND, Emmons County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Stutsman County, ND, Cherry County, NE, Hooker County, NE, Keya Paha County, NE, McPherson County, NE, Thomas County, NE, Brown County, SD, Campbell County, SD, Edmunds County, SD, Faulk County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jones County, SD, Lyman County, SD, McPherson County, SD, Mellette County, SD, Potter County, SD, Sully County, SD, Todd County, SD, Tripp County, SD, Walworth County, SD
The radar
The Aberdeen radar (KABR), 168 km from the middle of the area, began a volume at 23:32 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 12:00Z, 11.5 hours before the alert went out and 138 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
- 396 J/kg
- Mixed-layer CIN
- -392 J/kg
- Mixed-layer LCL
- 1130 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 101 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 |
|---|---|---|---|---|
| Sep 23, 1:51 PM MDT | Mesoscale Discussion | SPC | Arthur, Cherry, Cheyenne, Deuel, Garden, Grant and 3 more | 114 min |
| Sep 23, 2:23 PM MDT | Severe Thunderstorm Watch | SPC | Arthur, Blaine, Brown, Cherry, Deuel, Garden and 9 more | 8 hr |
| Sep 23, 5:45 PM MDT | Mesoscale Discussion | SPC | Barnes, Benson, Cass, Cavalier, Eddy, Foster and 11 more | 2 hr |
Nearby
Mesoscale Discussions in South Dakota, 2007Mesoscale Discussions in North Dakota, 2007Mesoscale Discussions in Nebraska, 2007Every mesoscale discussion in 2007
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.