Alert archive / South Dakota / Mesoscale Discussions in 2007

Mesoscale Discussion 1269

June 24, 2007Adams County, North Dakota; 10 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 24, 2007, 6:11 PM MDT for Adams County, North Dakota; 10 counties in South Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 24, 2007, 6:11 PM MDT (00:11 UTC)
Expired: Jun 24, 2007, 8:15 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Adams County, ND, Butte County, SD, Corson County, SD, Dewey County, SD, Haakon County, SD, Harding County, SD, Meade County, SD, Pennington County, SD, Perkins County, SD, Stanley County, SD, Ziebach County, SD

The radar

The Rapid City radar (KUDX), 83 km from the middle of the area, began a volume at 00:13 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.

Severe Thunderstorm Watch 448Jun 24, 6:30 PM MDT

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 0.2 hours before the alert went out and 270 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: 3796 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 1514 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 183 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 17.3

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 24, 6:30 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Billings, Bowman, Golden Valley, Grant, Hettinger and 3 more	4 hr
Jun 24, 7:11 PM MDT	Mesoscale Discussion	SPC	Benson, Burleigh, Cavalier, Eddy, McHenry, McLean and 10 more	64 min
Jun 24, 8:30 PM MDT	Mesoscale Discussion	SPC	Adams, Grant, Hettinger, Sioux, Stark	90 min
Jun 24, 9:47 PM MDT	Mesoscale Discussion	SPC	Benson, Billings, Bottineau, Bowman, Dunn, Golden Valley and 16 more	58 min
Jun 24, 10:36 PM MDT	Severe Thunderstorm Watch	SPC	Benson, Billings, Bottineau, Burleigh, Cavalier, Dunn and 31 more	7 hr
Jun 25, 2:31 AM MDT	Mesoscale Discussion	SPC	Bottineau, Cavalier, Dunn, McHenry, McLean, Mountrail and 6 more	89 min
Jun 25, 9:12 AM MDT	Mesoscale Discussion	SPC	Divide	93 min
Jun 25, 2:59 PM MDT	Mesoscale Discussion	SPC	Burleigh, Emmons, Grant, Kidder, Logan, Morton and 4 more	91 min
Jun 25, 4:48 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Billings, Bowman, Dunn, Golden Valley, Hettinger and 3 more	8 hr
Jun 25, 5:57 PM MDT	Mesoscale Discussion	SPC	Benson, Cavalier, Eddy, Nelson, Pembina, Ramsey and 3 more	2 hr

Nearby

Mesoscale Discussions in South Dakota, 2007 Mesoscale Discussions in North Dakota, 2007 Every mesoscale discussion in 2007

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.