Alert archive / South Dakota / Mesoscale Discussions in 2016

Mesoscale Discussion 1236

July 10, 2016Keya Paha County, Nebraska; 17 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 10, 2016, 3:06 PM CDT for Keya Paha County, Nebraska; 17 counties in South Dakota. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Jul 10, 2016, 3:06 PM CDT (20:06 UTC)
Expired: Jul 10, 2016, 4:30 PM CDT
In force: 84 min
Issued by: the Storm Prediction Center
Chance of a watch: 60%

Counties Keya Paha County, NE, Bennett County, SD, Brule County, SD, Buffalo County, SD, Dewey County, SD, Gregory County, SD, Haakon County, SD, Hughes County, SD, Hyde County, SD, Jackson County, SD, Jones County, SD, Lyman County, SD, Mellette County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Todd County, SD, Tripp County, SD

The radar

The North Platte radar (KLNX), 198 km from the middle of the area, began a volume at 20:05 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

Aberdeen, SD (KABR), launched 12:00Z, 8.1 hours before the alert went out and 204 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1202 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 10 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 9, 8:32 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Campbell, Corson, Edmunds, Faulk, McPherson and 3 more	5 hr
Jul 9, 10:44 PM CDT	Mesoscale Discussion	SPC	Brown, Campbell, Day, Edmunds, Faulk, Grant and 7 more	91 min
Jul 9, 11:36 PM CDT	Severe Thunderstorm Watch	SPC	Clark, Codington, Day, Deuel, Grant, Hamlin and 2 more	5 hr
Jul 10, 1:23 AM CDT	Mesoscale Discussion	SPC	Grant, Roberts	2 hr
Jul 10, 2:19 PM CDT	Mesoscale Discussion	SPC	Harding	86 min
Jul 10, 2:48 PM CDT	Severe Thunderstorm Watch	SPC	Harding, Perkins	7 hr

Nearby

Mesoscale Discussions in South Dakota, 2016 Mesoscale Discussions in Nebraska, 2016 Every 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.