Alert archive / South Dakota / Mesoscale Discussions in 2011
Mesoscale Discussion 1387
The Storm Prediction Center issued this mesoscale discussion at Jun 25, 2011, 5:21 PM MDT for 11 counties in Nebraska; Adams County, North Dakota; 18 counties in South Dakota. It was in force for 84 min.
The area
The outline as issued.
The facts
- Issued
- Jun 25, 2011, 5:21 PM MDT (23:21 UTC)
- Expired
- Jun 25, 2011, 6:45 PM MDT
- In force
- 84 min
- Issued by
- the Storm Prediction Center
All 30 counties
Adams County, ND, Arthur County, NE, Box Butte County, NE, Cherry County, NE, Dawes County, NE, Garden County, NE, Grant County, NE, Hooker County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Bennett County, SD, Butte County, SD, Corson County, SD, Custer County, SD, Dewey County, SD, Fall River County, SD, Haakon County, SD, Jackson County, SD, Jones County, SD, Lawrence County, SD, Meade County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Perkins County, SD, Stanley County, SD, Todd County, SD, Ziebach County, SD
The radar
The Rapid City radar (KUDX), 24 km from the middle of the area, began a volume at 23:23 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
Bismarck Municip, ND (KBIS), launched 12:00Z, 11.4 hours before the alert went out and 346 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
- 1375 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 615 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 15 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 |
|---|---|---|---|---|
| Jun 25, 12:46 AM MDT | Mesoscale Discussion | SPC | Adams, Buffalo, Clay, Fillmore, Gage, Hall and 15 more | 89 min |
| Jun 25, 1:24 PM MDT | Mesoscale Discussion | SPC | Banner, Box Butte, Dawes, Kimball, Morrill, Scotts Bluff and 1 more | 96 min |
| Jun 25, 2:24 PM MDT | Mesoscale Discussion | SPC | Adams, Benson, Billings, Bottineau, Burleigh, Dunn and 15 more | 66 min |
Nearby
Mesoscale Discussions in South Dakota, 2011Mesoscale Discussions in Nebraska, 2011Mesoscale Discussions in North Dakota, 2011Every mesoscale discussion in 2011
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.