Alert archive / South Dakota / Mesoscale Discussions in 2005
Mesoscale Discussion 2176
The Storm Prediction Center issued this mesoscale discussion at Sep 12, 2005, 2:27 PM CDT for 14 counties in Minnesota; 34 counties in South Dakota. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 12, 2005, 2:27 PM CDT (19:27 UTC)
- Expired
- Sep 12, 2005, 4:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 48 counties
Big Stone County, MN, Chippewa County, MN, Cottonwood County, MN, Lac qui Parle County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Redwood County, MN, Renville County, MN, Rock County, MN, Swift County, MN, Yellow Medicine County, MN, Aurora County, SD, Beadle County, SD, Brookings County, SD, Brule County, SD, Buffalo County, SD, Clark County, SD, Codington County, SD, Davison County, SD, Day County, SD, Deuel County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Hamlin County, SD, Hand County, SD, Hanson County, SD, Hughes County, SD, Hyde County, SD, Jerauld County, SD, Jones County, SD, Kingsbury County, SD, Lake County, SD, Lyman County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Potter County, SD, Sanborn County, SD, Spink County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD
The radar
The Sioux Falls radar (KFSD), 91 km from the middle of the area, began a volume at 19:30 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, 7.5 hours before the alert went out and 107 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1476 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 91 m²/s²
- 0-3 km storm-relative helicity
- 153 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 |
|---|---|---|---|---|
| Sep 12, 7:26 AM CDT | Mesoscale Discussion | SPC | Anoka, Benton, Blue Earth, Brown, Carver, Chippewa and 30 more | 94 min |
| Sep 12, 3:40 PM CDT | Tornado Watch | SPC | Chippewa, Cottonwood, Jackson, Lac qui Parle, Lincoln, Lyon and 6 more | 4 hr |
| Sep 12, 6:47 PM CDT | Mesoscale Discussion | SPC | Blue Earth, Brown, Carver, Chippewa, Cottonwood, Faribault and 23 more | 88 min |
| Sep 12, 5:25 PM CDT | Mesoscale Discussion | SPC | Bennett, Butte, Custer, Fall River, Haakon, Jackson and 6 more | 2 hr |
Nearby
Mesoscale Discussions in South Dakota, 2005Mesoscale Discussions in Minnesota, 2005Every mesoscale discussion in 2005
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.