Alert archive / South Dakota / Mesoscale Discussions in 2016
Mesoscale Discussion 1402
The Storm Prediction Center issued this mesoscale discussion at Jul 26, 2016, 5:32 PM CDT for 7 counties in Nebraska; 19 counties in South Dakota; Niobrara County, Wyoming. It was in force for 118 min.
The area
The outline as issued.
The facts
- Issued
- Jul 26, 2016, 5:32 PM CDT (22:32 UTC)
- Expired
- Jul 26, 2016, 7:30 PM CDT
- In force
- 118 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 27 counties
Boyd County, NE, Brown County, NE, Cherry County, NE, Dawes County, NE, Keya Paha County, NE, Rock County, NE, Sheridan County, NE, Aurora County, SD, Bennett County, SD, Brule County, SD, Buffalo County, SD, Charles Mix County, SD, Custer County, SD, Fall River County, SD, Gregory County, SD, Haakon County, SD, Jackson County, SD, Jones County, SD, Lawrence County, SD, Lyman County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Stanley County, SD, Todd County, SD, Tripp County, SD, Niobrara County, WY
The radar
The North Platte radar (KLNX), 154 km from the middle of the area, began a volume at 22:33 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 12:00Z, 10.5 hours before the alert went out and 170 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
- 1292 J/kg
- Mixed-layer CIN
- -232 J/kg
- Mixed-layer LCL
- 2137 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 26, 6:05 PM CDT | Severe Thunderstorm Watch | SPC | Arthur, Boyd, Brown, Cherry, Garden, Grant and 8 more | 6 hr |
| Jul 26, 12:09 PM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Brown, Brule, Buffalo, Clark and 17 more | 96 min |
Nearby
Mesoscale Discussions in South Dakota, 2016Mesoscale Discussions in Nebraska, 2016Mesoscale Discussions in Wyoming, 2016Every mesoscale discussion in 2016
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.