Alert archive / South Dakota / Mesoscale Discussions in 2005

Mesoscale Discussion 1231

June 7, 2005Emmons County, McIntosh County, Sioux County, North Dakota; 15 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 7, 2005, 7:14 PM CDT for Emmons County, McIntosh County, Sioux County, North Dakota; 15 counties in South Dakota. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Jun 7, 2005, 7:14 PM CDT (00:14 UTC)
Expired: Jun 7, 2005, 8:45 PM CDT
In force: 91 min
Issued by: the Storm Prediction Center

Counties Emmons County, ND, McIntosh County, ND, Sioux County, ND, Campbell County, SD, Corson County, SD, Dewey County, SD, Haakon County, SD, Hughes County, SD, Jackson County, SD, Jones County, SD, McPherson County, SD, Mellette County, SD, Oglala Lakota County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD, Ziebach County, SD

The radar

The Rapid City radar (KUDX), 119 km from the middle of the area, began a volume at 00:14 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.

Tornado Watch 432Jun 7, 9:50 PM CDT

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 0.2 hours before the alert went out and 244 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: 179 J/kg
Mixed-layer CIN: -232 J/kg
Mixed-layer LCL: 2572 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 114 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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
Jun 7, 9:18 PM CDT	Mesoscale Discussion	SPC	Barnes, Cass, Dickey, LaMoure, Ransom, Richland and 1 more	57 min
Jun 7, 9:50 PM CDT	Tornado Watch	SPC	Barnes, Cass, Dickey, LaMoure, Ransom, Richland and 2 more	7 hr
Jun 7, 11:46 PM CDT	Mesoscale Discussion	SPC	Richland, Sargent	59 min
Jun 8, 3:49 PM CDT	Mesoscale Discussion	SPC	Grand Forks, Nelson, Pembina, Traill, Walsh	116 min
Jun 7, 11:50 PM CDT	Severe Thunderstorm Watch	SPC	Bon Homme, Clay, Union	5 hr

Nearby

Mesoscale Discussions in South Dakota, 2005 Mesoscale Discussions in North Dakota, 2005 Every mesoscale discussion in 2005

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.