Alert archive / South Dakota / Mesoscale Discussions in 2004
Mesoscale Discussion 2013
The Storm Prediction Center issued this mesoscale discussion at Aug 15, 2004, 5:01 PM CDT for 4 states. It was in force for 119 min.
The area
The outline as issued.
The facts
- Issued
- Aug 15, 2004, 5:01 PM CDT (22:01 UTC)
- Expired
- Aug 15, 2004, 7:00 PM CDT
- In force
- 119 min
- Issued by
- the Storm Prediction Center
All 54 counties
Dickinson County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Sioux County, IA, Brown County, MN, Cottonwood County, MN, Jackson County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Redwood County, MN, Rock County, MN, Watonwan County, MN, Yellow Medicine County, MN, Boyd County, NE, Cherry County, NE, Grant County, NE, Keya Paha County, NE, Knox County, NE, Sheridan County, NE, Aurora County, SD, Bennett County, SD, Bon Homme County, SD, Brookings County, SD, Brule County, SD, Buffalo County, SD, Charles Mix County, SD, Clay County, SD, Davison County, SD, Deuel County, SD, Douglas County, SD, Gregory County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, Lyman County, SD, McCook County, SD, Mellette County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Sanborn County, SD, Todd County, SD, Tripp County, SD, Turner County, SD, Union County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 116 km from the middle of the area, began a volume at 22:02 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 12:00Z, 10.0 hours before the alert went out and 167 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
- 1335 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 96 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 15, 1:43 PM CDT | Mesoscale Discussion | SPC | Box Butte, Cherry, Dawes, Sheridan, Sioux | 2 hr |
| Aug 15, 2:50 PM CDT | Severe Thunderstorm Watch | SPC | Arthur, Cherry, Deuel, Garden, Grant, Hooker and 2 more | 6 hr |
Nearby
Mesoscale Discussions in South Dakota, 2004Mesoscale Discussions in Minnesota, 2004Mesoscale Discussions in Iowa, 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.