Alert archive / South Dakota / Mesoscale Discussions in 2017
Mesoscale Discussion 723
The Storm Prediction Center issued this mesoscale discussion at May 15, 2017, 6:34 PM MDT for 5 states. It was in force for 56 min.
The area
The outline as issued.
The facts
- Issued
- May 15, 2017, 6:34 PM MDT (00:34 UTC)
- Expired
- May 15, 2017, 7:30 PM MDT
- In force
- 56 min
- Issued by
- the Storm Prediction Center
All 34 counties
Carter County, MT, Custer County, MT, Fallon County, MT, Powder River County, MT, Prairie County, MT, Wibaux County, MT, Adams County, ND, Bowman County, ND, Golden Valley County, ND, Hettinger County, ND, Slope County, ND, Banner County, NE, Box Butte County, NE, Dawes County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Butte County, SD, Custer County, SD, Fall River County, SD, Harding County, SD, Lawrence County, SD, Meade County, SD, Oglala Lakota County, SD, Pennington County, SD, Perkins County, SD, Campbell County, WY, Converse County, WY, Crook County, WY, Goshen County, WY, Niobrara County, WY, Platte County, WY, Weston County, WY
The radar
The Rapid City radar (KUDX), 128 km from the middle of the area, began a volume at 00:37 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
Rapid City, SD (KRAP), launched 00:00Z, 0.6 hours before the alert went out and 127 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
- 555 J/kg
- Mixed-layer CIN
- -115 J/kg
- Mixed-layer LCL
- 1143 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 117 m²/s²
- 0-3 km storm-relative helicity
- 177 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 3.7
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 |
|---|---|---|---|---|
| May 15, 6:41 PM MDT | Mesoscale Discussion | SPC | Burt, Butler, Colfax, Cuming, Dodge, Madison and 9 more | 3 hr |
| May 15, 9:53 PM MDT | Mesoscale Discussion | SPC | Banner, Box Butte, Dawes, Morrill, Scotts Bluff, Sheridan and 1 more | 67 min |
| May 15, 10:54 PM MDT | Severe Thunderstorm Watch | SPC | Dakota, Dixon | 3 hr |
| May 16, 1:16 PM MDT | Mesoscale Discussion | SPC | Banner, Cheyenne, Kimball, Scotts Bluff, Sioux | 119 min |
| May 16, 2:58 PM MDT | Mesoscale Discussion | SPC | Adams, Burt, Butler, Cass, Clay, Colfax and 33 more | 2 hr |
| May 16, 3:57 PM MDT | Severe Thunderstorm Watch | SPC | Adams, Burt, Butler, Cass, Clay, Colfax and 33 more | 7 hr |
| May 16, 4:47 PM MDT | Mesoscale Discussion | SPC | Arthur, Blaine, Box Butte, Brown, Chase, Cherry and 21 more | 88 min |
| May 16, 1:13 AM MDT | Mesoscale Discussion | SPC | Clay, Hutchinson, Lincoln, McCook, Minnehaha, Moody and 3 more | 92 min |
Nearby
Mesoscale Discussions in South Dakota, 2017Mesoscale Discussions in Nebraska, 2017Mesoscale Discussions in Wyoming, 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.