Alert archive / South Dakota / Mesoscale Discussions in 2004
Mesoscale Discussion 2122
The Storm Prediction Center issued this mesoscale discussion at Aug 26, 2004, 4:39 PM CDT for 6 counties in Minnesota; 7 counties in North Dakota; 8 counties in South Dakota. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 26, 2004, 4:39 PM CDT (21:39 UTC)
- Expired
- Aug 26, 2004, 6:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 21 counties
Big Stone County, MN, Grant County, MN, Pope County, MN, Stevens County, MN, Swift County, MN, Traverse County, MN, Dickey County, ND, Emmons County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Richland County, ND, Sargent County, ND, Brown County, SD, Campbell County, SD, Day County, SD, Edmunds County, SD, Grant County, SD, Marshall County, SD, McPherson County, SD, Roberts County, SD
The radar
The Aberdeen radar (KABR), 58 km from the middle of the area, began a volume at 21:43 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 12:00Z, 9.7 hours before the alert went out and 112 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
- 2 J/kg
- Mixed-layer CIN
- -414 J/kg
- Mixed-layer LCL
- 2071 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- -135 m²/s²
- 0-3 km storm-relative helicity
- -24 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 |
|---|---|---|---|---|
| Aug 26, 2:29 PM CDT | Mesoscale Discussion | SPC | Fillmore, Freeborn, Houston, Mower, Winona | 2 hr |
| Aug 26, 3:47 PM CDT | Mesoscale Discussion | SPC | Cook, Itasca, Koochiching, Lake, Saint Louis | 118 min |
| Aug 26, 4:10 PM CDT | Tornado Watch | SPC | Fillmore, Houston, Mower | 6 hr |
| Aug 26, 4:38 PM CDT | Mesoscale Discussion | SPC | Olmsted, Wabasha, Winona | 97 min |
| Aug 25, 7:05 PM CDT | Severe Thunderstorm Watch | SPC | Barnes, Benson, Burleigh, Dickey, Eddy, Emmons and 17 more | 5 hr |
| Aug 25, 10:13 PM CDT | Mesoscale Discussion | SPC | Barnes, Benson, Burleigh, Dickey, Eddy, Emmons and 17 more | 2 hr |
Nearby
Mesoscale Discussions in South Dakota, 2004Mesoscale Discussions in North Dakota, 2004Mesoscale Discussions in Minnesota, 2004Every mesoscale discussion in 2004
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.