Alert archive / South Dakota / Mesoscale Discussions in 2014

Mesoscale Discussion 1166

June 26, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Jun 26, 2014, 8:13 PM MDT for 4 states. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued: Jun 26, 2014, 8:13 PM MDT (02:13 UTC)
Expired: Jun 26, 2014, 9:15 PM MDT
In force: 62 min
Issued by: the Storm Prediction Center

Counties Carter County, MT, Fallon County, MT, Powder River County, MT, Bowman County, ND, Butte County, SD, Custer County, SD, Harding County, SD, Lawrence County, SD, Meade County, SD, Pennington County, SD, Perkins County, SD, Campbell County, WY, Crook County, WY, Weston County, WY

The radar

The Rapid City radar (KUDX), 146 km from the middle of the area, began a volume at 02:16 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 (KRAP), launched 00:00Z, 2.2 hours before the alert went out and 146 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: 1840 J/kg
Mixed-layer CIN: -113 J/kg
Mixed-layer LCL: 1731 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 72 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
Jun 27, 1:54 PM MDT	Mesoscale Discussion	SPC	Barnes, Cass, Grand Forks, Griggs, LaMoure, Nelson and 7 more	2 hr
Jun 27, 3:57 PM MDT	Mesoscale Discussion	SPC	Bennett, Gregory, Haakon, Hughes, Jackson, Jones and 9 more	93 min
Jun 27, 4:17 PM MDT	Severe Thunderstorm Watch	SPC	Bennett, Butte, Custer, Fall River, Haakon, Harding and 9 more	6 hr
Jun 27, 5:47 PM MDT	Mesoscale Discussion	SPC	Fall River	58 min
Jun 27, 12:05 PM MDT	Mesoscale Discussion	SPC	Goshen, Laramie, Platte	115 min
Jun 27, 12:48 PM MDT	Severe Thunderstorm Watch	SPC	Goshen, Laramie, Niobrara, Platte	6 hr

Nearby

Mesoscale Discussions in South Dakota, 2014 Mesoscale Discussions in Montana, 2014 Mesoscale Discussions in Wyoming, 2014 Every mesoscale discussion in 2014

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.