Alert archive / South Dakota / Mesoscale Discussions in 2005

Mesoscale Discussion 1698

July 7, 20059 counties in North Dakota; 14 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 7, 2005, 5:48 PM MDT for 9 counties in North Dakota; 14 counties in South Dakota. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued: Jul 7, 2005, 5:48 PM MDT (23:48 UTC)
Expired: Jul 7, 2005, 7:15 PM MDT
In force: 87 min
Issued by: the Storm Prediction Center

All 23 counties

Adams County, ND, Bowman County, ND, Golden Valley County, ND, Grant County, ND, Hettinger County, ND, Morton County, ND, Sioux County, ND, Slope County, ND, Stark County, ND, Bennett County, SD, Butte County, SD, Corson County, SD, Custer County, SD, Fall River County, SD, Haakon County, SD, Harding County, SD, Jackson County, SD, Lawrence County, SD, Meade County, SD, Oglala Lakota County, SD, Pennington County, SD, Perkins County, SD, Ziebach County, SD

The radar

The Rapid City radar (KUDX), 69 km from the middle of the area, began a volume at 23:50 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

Rapid City, SD (KUNR), launched 12:00Z, 11.8 hours before the alert went out and 76 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: 190 J/kg
Mixed-layer CIN: -343 J/kg
Mixed-layer LCL: 2707 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -18 m²/s²
0-3 km storm-relative helicity: 8 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

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
Jul 7, 2:30 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Bowman, Golden Valley, Grant, Hettinger, Morton and 2 more	8 hr
Jul 7, 4:47 PM MDT	Mesoscale Discussion	SPC	Bottineau, Burke, Dunn, McHenry, McLean, Mercer and 8 more	118 min
Jul 7, 5:45 PM MDT	Severe Thunderstorm Watch	SPC	Benson, Bottineau, Burke, Burleigh, Dunn, Kidder and 13 more	7 hr
Jul 7, 1:01 PM MDT	Mesoscale Discussion	SPC	Bennett, Butte, Custer, Fall River, Jackson, Lawrence and 3 more	89 min

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.