Alert archive / South Dakota / Mesoscale Discussions in 2013

Mesoscale Discussion 1036

June 11, 20134 counties in Nebraska; 11 counties in South Dakota; Weston County, Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2013, 8:16 PM MDT for 4 counties in Nebraska; 11 counties in South Dakota; Weston County, Wyoming. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued: Jun 11, 2013, 8:16 PM MDT (02:16 UTC)
Expired: Jun 11, 2013, 9:15 PM MDT
In force: 59 min
Issued by: the Storm Prediction Center

Counties Box Butte County, NE, Dawes County, NE, Sheridan County, NE, Sioux County, NE, Bennett County, SD, Butte County, SD, Custer County, SD, Fall River County, SD, Haakon County, SD, Jackson County, SD, Lawrence County, SD, Meade County, SD, Oglala Lakota County, SD, Pennington County, SD, Ziebach County, SD, Weston County, WY

The radar

The Rapid City radar (KUDX), 60 km from the middle of the area, began a volume at 02:17 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 00:00Z, 2.3 hours before the alert went out and 53 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: 1471 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 619 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 190 m²/s²
0-3 km storm-relative helicity: 323 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 9.4

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 11, 10:12 PM MDT	Mesoscale Discussion	SPC	Antelope, Boone, Cedar, Cuming, Dakota, Dixon and 16 more	2 hr
Jun 11, 6:23 PM MDT	Mesoscale Discussion	SPC	Butte, Custer, Fall River, Harding, Jackson, Lawrence and 3 more	97 min
Jun 11, 6:42 PM MDT	Severe Thunderstorm Watch	SPC	Bennett, Butte, Custer, Haakon, Jackson, Lawrence and 3 more	5 hr
Jun 11, 9:48 PM MDT	Mesoscale Discussion	SPC	Bennett, Custer, Dewey, Haakon, Hughes, Jackson and 11 more	87 min
Jun 12, 3:37 AM MDT	Mesoscale Discussion	SPC	Brookings, Codington, Deuel, Grant, Hamlin, Roberts	2 hr
Jun 12, 4:06 PM MDT	Mesoscale Discussion	SPC	Campbell, Crook, Johnson, Sheridan	54 min

Nearby

Mesoscale Discussions in South Dakota, 2013 Mesoscale Discussions in Nebraska, 2013 Mesoscale Discussions in Wyoming, 2013 Every mesoscale discussion in 2013

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.