Alert archive / South Dakota / Mesoscale Discussions in 2017
Mesoscale Discussion 981
The Storm Prediction Center issued this mesoscale discussion at Jun 10, 2017, 9:44 PM CDT for 28 counties in South Dakota. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 10, 2017, 9:44 PM CDT (02:44 UTC)
- Expired
- Jun 10, 2017, 11:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 28 counties
Aurora County, SD, Beadle County, SD, Brule County, SD, Buffalo County, SD, Butte County, SD, Custer County, SD, Davison County, SD, Dewey County, SD, Faulk County, SD, Haakon County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jackson County, SD, Jerauld County, SD, Jones County, SD, Lawrence County, SD, Lyman County, SD, Meade County, SD, Mellette County, SD, Pennington County, SD, Potter County, SD, Sanborn County, SD, Spink County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD, Ziebach County, SD
The radar
The Rapid City radar (KUDX), 131 km from the middle of the area, began a volume at 02:45 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
Rapid City, SD (KRAP), launched 00:00Z, 2.7 hours before the alert went out and 136 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
- 95 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 2486 m above ground
- 0-6 km bulk shear
- 85 kt
- 0-1 km storm-relative helicity
- 206 m²/s²
- 0-3 km storm-relative helicity
- 218 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
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 |
|---|---|---|---|---|
| Jun 10, 10:01 PM CDT | Severe Thunderstorm Watch | SPC | Buffalo, Butte, Custer, Dewey, Edmunds, Faulk and 17 more | 7 hr |
| Jun 10, 11:56 PM CDT | Mesoscale Discussion | SPC | Brule, Buffalo, Butte, Custer, Dewey, Edmunds and 17 more | 2 hr |
| Jun 11, 2:02 AM CDT | Mesoscale Discussion | SPC | Beadle, Brookings, Buffalo, Clark, Codington, Day and 11 more | 58 min |
| Jun 11, 2:37 AM CDT | Severe Thunderstorm Watch | SPC | Beadle, Brookings, Clark, Codington, Deuel, Grant and 8 more | 5 hr |
| Jun 11, 4:00 AM CDT | Mesoscale Discussion | SPC | Beadle, Brookings, Jerauld, Kingsbury, Lake, Miner and 2 more | 60 min |
Nearby
Mesoscale Discussions in South Dakota, 2017Every mesoscale discussion in 2017
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.