Alert archive / South Dakota / Mesoscale Discussions in 2008

Mesoscale Discussion 2168

August 26, 2008Cherry County, Nebraska; 4 counties in North Dakota; 12 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 26, 2008, 6:25 PM MDT for Cherry County, Nebraska; 4 counties in North Dakota; 12 counties in South Dakota. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: Aug 26, 2008, 6:25 PM MDT (00:25 UTC)
Expired: Aug 26, 2008, 8:00 PM MDT
In force: 95 min
Issued by: the Storm Prediction Center

Counties Kidder County, ND, Logan County, ND, McIntosh County, ND, Wells County, ND, Cherry County, NE, Campbell County, SD, Edmunds County, SD, Hughes County, SD, Hyde County, SD, Jones County, SD, Lyman County, SD, McPherson County, SD, Mellette County, SD, Potter County, SD, Sully County, SD, Todd County, SD, Walworth County, SD

The radar

The Rapid City radar (KUDX), 188 km from the middle of the area, began a volume at 00:28 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 00:00Z, 0.4 hours before the alert went out and 175 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: 70 J/kg
Mixed-layer CIN: -554 J/kg
Mixed-layer LCL: 1596 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 409 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 27, 3:40 AM MDT	Mesoscale Discussion	SPC	Burt, Cass, Dakota, Dodge, Douglas, Nemaha and 6 more	95 min
Aug 27, 3:48 PM MDT	Mesoscale Discussion	SPC	Antelope, Boyd, Cedar, Dakota, Dixon, Holt and 2 more	117 min
Aug 27, 1:24 AM MDT	Mesoscale Discussion	SPC	Brookings, Deuel	96 min

Nearby

Mesoscale Discussions in South Dakota, 2008 Mesoscale Discussions in North Dakota, 2008 Mesoscale Discussions in Nebraska, 2008 Every mesoscale discussion in 2008

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.