Alert archive / South Dakota / Mesoscale Discussions in 2012
Mesoscale Discussion 1536
The Storm Prediction Center issued this mesoscale discussion at Jul 21, 2012, 10:51 PM CDT for 8 counties in Minnesota; Keya Paha County, Nebraska; 30 counties in South Dakota. It was in force for 54 min.
The area
The outline as issued.
The facts
- Issued
- Jul 21, 2012, 10:51 PM CDT (03:51 UTC)
- Expired
- Jul 21, 2012, 11:45 PM CDT
- In force
- 54 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 39 counties
Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Redwood County, MN, Rock County, MN, Yellow Medicine County, MN, Keya Paha County, NE, Aurora County, SD, Beadle County, SD, Brookings County, SD, Brule County, SD, Buffalo County, SD, Charles Mix County, SD, Clark County, SD, Codington County, SD, Davison County, SD, Deuel County, SD, Douglas County, SD, Gregory County, SD, Hamlin County, SD, Hand County, SD, Hanson County, SD, Hutchinson County, SD, Hyde County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lyman County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Sanborn County, SD, Spink County, SD, Todd County, SD, Tripp County, SD, Turner County, SD
The radar
The Sioux Falls radar (KFSD), 119 km from the middle of the area, began a volume at 03:51 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
Bismarck Municip, ND (KBIS), launched 00:00Z, 3.9 hours before the alert went out and 372 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
- 2443 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 157 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 22, 1:40 PM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Clay, Clearwater, Hubbard, Koochiching and 7 more | 95 min |
| Jul 22, 2:32 PM CDT | Mesoscale Discussion | SPC | Blue Earth, Dodge, Faribault, Fillmore, Freeborn, Houston and 8 more | 88 min |
| Jul 22, 3:25 PM CDT | Severe Thunderstorm Watch | SPC | Aitkin, Becker, Beltrami, Carlton, Cass, Clay and 18 more | 6 hr |
| Jul 22, 5:45 PM CDT | Severe Thunderstorm Watch | SPC | Big Stone, Traverse | 4 hr |
| Jul 22, 6:55 PM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Cass, Clay, Clearwater, Hubbard and 11 more | 95 min |
| Jul 21, 9:27 PM CDT | Mesoscale Discussion | SPC | Corson, Dewey, Haakon, Harding, Meade, Pennington and 2 more | 63 min |
| Jul 22, 4:38 PM CDT | Mesoscale Discussion | SPC | Brown, Campbell, Clark, Codington, Day, Dewey and 9 more | 97 min |
Nearby
Mesoscale Discussions in South Dakota, 2012Mesoscale Discussions in Minnesota, 2012Mesoscale Discussions in Nebraska, 2012Every mesoscale discussion in 2012
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.