Alert archive / South Dakota / Mesoscale Discussions in 2004
Mesoscale Discussion 1752
The Storm Prediction Center issued this mesoscale discussion at Jul 21, 2004, 1:30 PM CDT for Big Stone County, Lac qui Parle County, Traverse County, Minnesota; Dickey County, Richland County, Sargent County, North Dakota; 18 counties in South Dakota. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 21, 2004, 1:30 PM CDT (18:30 UTC)
- Expired
- Jul 21, 2004, 3:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 24 counties
Big Stone County, MN, Lac qui Parle County, MN, Traverse County, MN, Dickey County, ND, Richland County, ND, Sargent County, ND, Beadle County, SD, Brookings County, SD, Brown County, SD, Clark County, SD, Codington County, SD, Day County, SD, Deuel County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Hamlin County, SD, Kingsbury County, SD, Marshall County, SD, McPherson County, SD, Moody County, SD, Potter County, SD, Roberts County, SD, Spink County, SD
The radar
The Aberdeen radar (KABR), 19 km from the middle of the area, began a volume at 18:50 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 44 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
- 220 J/kg
- Mixed-layer CIN
- -217 J/kg
- Mixed-layer LCL
- 1834 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- -6 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 |
|---|---|---|---|---|
| Jul 20, 9:00 PM CDT | Severe Thunderstorm Watch | SPC | Big Stone, Chippewa, Cottonwood, Jackson, Kandiyohi, Lac qui Parle and 10 more | 4 hr |
| Jul 20, 11:08 PM CDT | Mesoscale Discussion | SPC | Blue Earth, Carver, Dakota, Dodge, Faribault, Fillmore and 14 more | 97 min |
| Jul 21, 1:50 PM CDT | Severe Thunderstorm Watch | SPC | Big Stone, Chippewa, Douglas, Grant, Kandiyohi, Lac qui Parle and 9 more | 5 hr |
| Jul 21, 3:43 PM CDT | Mesoscale Discussion | SPC | Cottonwood, Jackson, Murray, Nobles, Pipestone, Rock | 92 min |
| Jul 21, 6:02 PM CDT | Mesoscale Discussion | SPC | Aitkin, Becker, Beltrami, Benton, Big Stone, Cass and 37 more | 118 min |
| Jul 20, 7:20 PM CDT | Mesoscale Discussion | SPC | Adams, Benson, Bottineau, Burleigh, Cavalier, Eddy and 22 more | 85 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.