Alert archive / South Dakota / Mesoscale Discussions in 2020
Mesoscale Discussion 1334
The Storm Prediction Center issued this mesoscale discussion at Jul 24, 2020, 7:28 PM CDT for 7 counties in Nebraska; 12 counties in North Dakota; 21 counties in South Dakota. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 24, 2020, 7:28 PM CDT (00:28 UTC)
- Expired
- Jul 24, 2020, 9:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 399...400
All 40 counties
Barnes County, ND, Dickey County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Steele County, ND, Stutsman County, ND, Blaine County, NE, Brown County, NE, Cherry County, NE, Keya Paha County, NE, Loup County, NE, Rock County, NE, Thomas County, NE, Brule County, SD, Buffalo County, SD, Campbell County, SD, Corson County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Gregory County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jones County, SD, Lyman County, SD, McPherson County, SD, Mellette County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Todd County, SD, Tripp County, SD, Walworth County, SD
The radar
The Aberdeen radar (KABR), 122 km from the middle of the area, began a volume at 00:30 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 nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 0.5 hours before the alert went out and 102 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
- 2265 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 1499 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -19 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 6:19 PM CDT | Mesoscale Discussion | SPC | Arthur, Blaine, Brown, Buffalo, Chase, Custer and 29 more | 86 min |
| Jul 25, 3:21 PM CDT | Mesoscale Discussion | SPC | Benson, Bottineau, Burleigh, McHenry, McLean, Mercer and 9 more | 114 min |
| Jul 25, 5:13 PM CDT | Severe Thunderstorm Watch | SPC | Benson, Burleigh, Dickey, Eddy, Emmons, Foster and 11 more | 7 hr |
Nearby
Mesoscale Discussions in South Dakota, 2020Mesoscale Discussions in North Dakota, 2020Mesoscale Discussions in Nebraska, 2020Every mesoscale discussion in 2020
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.