Alert archive / South Dakota / Mesoscale Discussions in 2005

Mesoscale Discussion 1225

June 7, 20057 counties in Nebraska; 18 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 7, 2005, 1:53 PM MDT for 7 counties in Nebraska; 18 counties in South Dakota. It was in force for 37 min.

The area

The outline as issued.

The facts

Issued: Jun 7, 2005, 1:53 PM MDT (19:53 UTC)
Expired: Jun 7, 2005, 2:30 PM MDT
In force: 37 min
Issued by: the Storm Prediction Center

All 25 counties

Box Butte County, NE, Brown County, NE, Cherry County, NE, Dawes County, NE, Keya Paha County, NE, Sheridan County, NE, Sioux County, NE, Bennett County, SD, Butte County, SD, Custer County, SD, Dewey County, SD, Fall River County, SD, Haakon County, SD, Jackson County, SD, Jones County, SD, Lyman County, SD, Meade County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Perkins County, SD, Stanley County, SD, Todd County, SD, Tripp County, SD, Ziebach County, SD

The radar

The Rapid City radar (KUDX), 102 km from the middle of the area, began a volume at 19:55 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.

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 7.9 hours before the alert went out and 104 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: 149 J/kg
Mixed-layer CIN: -169 J/kg
Mixed-layer LCL: 1285 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 116 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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 6, 6:15 PM MDT	Tornado Watch	SPC	Adams, Blaine, Brown, Buffalo, Custer, Dawson and 14 more	6 hr
Jun 6, 8:35 PM MDT	Mesoscale Discussion	SPC	Blaine, Brown, Buffalo, Custer, Dawson, Frontier and 8 more	85 min
Jun 7, 2:45 PM MDT	Tornado Watch	SPC	Box Butte, Cherry, Dawes, Sheridan, Sioux	8 hr
Jun 6, 7:37 PM MDT	Mesoscale Discussion	SPC	Aurora, Brule, Buffalo, Campbell, Corson, Dewey and 13 more	83 min
Jun 6, 8:00 PM MDT	Severe Thunderstorm Watch	SPC	Brule, Buffalo, Campbell, Corson, Dewey, Edmunds and 15 more	6 hr
Jun 7, 12:46 AM MDT	Mesoscale Discussion	SPC	Aurora, Beadle, Brown, Brule, Buffalo, Clark and 19 more	89 min
Jun 7, 3:40 PM MDT	Mesoscale Discussion	SPC	Butte, Campbell, Corson, Dewey, Harding, Perkins and 2 more	65 min
Jun 7, 4:05 PM MDT	Tornado Watch	SPC	Butte, Campbell, Corson, Dewey, Edmunds, Faulk and 8 more	7 hr

Nearby

Mesoscale Discussions in South Dakota, 2005 Mesoscale Discussions in Nebraska, 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.