Alert archive / South Dakota / Mesoscale Discussions in 2004
Mesoscale Discussion 2107
The Storm Prediction Center issued this mesoscale discussion at Aug 25, 2004, 1:31 PM CDT for 4 states. It was in force for 119 min.
The area
The outline as issued.
The facts
- Issued
- Aug 25, 2004, 1:31 PM CDT (18:31 UTC)
- Expired
- Aug 25, 2004, 3:30 PM CDT
- In force
- 119 min
- Issued by
- the Storm Prediction Center
All 49 counties
Lyon County, IA, O'Brien County, IA, Osceola County, IA, Sioux County, IA, Big Stone County, MN, Lac qui Parle County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Yellow Medicine County, MN, Dickey County, ND, Emmons County, ND, Logan County, ND, McIntosh County, ND, Sargent County, ND, Beadle County, SD, Bon Homme County, SD, Brookings County, SD, Brown County, SD, Clark County, SD, Clay County, SD, Codington County, SD, Davison County, SD, Day County, SD, Deuel County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Hamlin County, SD, Hanson County, SD, Hutchinson County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, Marshall County, SD, McCook County, SD, McPherson County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Roberts County, SD, Sanborn County, SD, Spink County, SD, Turner County, SD, Union County, SD, Yankton County, SD
The radar
The Aberdeen radar (KABR), 116 km from the middle of the area, began a volume at 18:41 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, 6.5 hours before the alert went out and 74 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
- 1 J/kg
- Mixed-layer CIN
- -409 J/kg
- Mixed-layer LCL
- 1929 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 91 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 25, 8:50 AM CDT | Severe Thunderstorm Watch | SPC | Adams, Clarke, Decatur, Fremont, Madison, Mills and 6 more | 5 hr |
| Aug 25, 9:24 AM CDT | Mesoscale Discussion | SPC | Appanoose, Davis, Des Moines, Henry, Jefferson, Lee and 2 more | 2 hr |
| Aug 25, 12:35 PM CDT | Tornado Watch | SPC | Appanoose, Davis, Decatur, Des Moines, Henry, Jefferson and 7 more | 6 hr |
| Aug 25, 1:22 PM CDT | Mesoscale Discussion | SPC | Clinton, Jackson, Scott | 113 min |
| Aug 25, 3:35 PM CDT | Severe Thunderstorm Watch | SPC | Barnes, Burleigh, Dickey, Kidder, LaMoure, Logan and 4 more | 5 hr |
| Aug 25, 5:47 PM CDT | Mesoscale Discussion | SPC | Barnes, Benson, Bottineau, Burleigh, Dickey, Eddy and 20 more | 118 min |
Nearby
Mesoscale Discussions in South Dakota, 2004Mesoscale Discussions in Minnesota, 2004Mesoscale Discussions in North Dakota, 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.