Alert archive / Nebraska / Mesoscale Discussions in 2016

Mesoscale Discussion 1516

August 10, 20164 states

The Storm Prediction Center issued this mesoscale discussion at Aug 10, 2016, 4:18 PM MDT for 4 states. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: Aug 10, 2016, 4:18 PM MDT (22:18 UTC)
Expired: Aug 10, 2016, 5:15 PM MDT
In force: 57 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 31 counties

Logan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Banner County, NE, Box Butte County, NE, Cheyenne County, NE, Dawes County, NE, Deuel County, NE, Garden County, NE, Grant County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Bennett County, SD, Butte County, SD, Custer County, SD, Fall River County, SD, Harding County, SD, Jackson County, SD, Lawrence County, SD, Meade County, SD, Oglala Lakota County, SD, Pennington County, SD, Perkins County, SD, Crook County, WY, Goshen County, WY, Niobrara County, WY, Weston County, WY

The radar

The Rapid City radar (KUDX), 156 km from the middle of the area, began a volume at 22:20 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, 10.3 hours before the alert went out and 149 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: 205 J/kg
Mixed-layer CIN: -462 J/kg
Mixed-layer LCL: 2872 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 9, 6:30 PM MDT	Mesoscale Discussion	SPC	Butte, Corson, Dewey, Haakon, Harding, Meade and 3 more	2 hr
Aug 9, 8:51 PM MDT	Mesoscale Discussion	SPC	Brown, Campbell, Corson, Dewey, Edmunds, Faulk and 7 more	114 min
Aug 9, 9:19 PM MDT	Severe Thunderstorm Watch	SPC	Brown, Campbell, Clark, Codington, Day, Deuel and 10 more	8 hr
Aug 10, 12:05 AM MDT	Mesoscale Discussion	SPC	Brown, Day, Edmunds, Grant, McPherson, Marshall and 1 more	55 min
Aug 10, 10:19 AM MDT	Mesoscale Discussion	SPC	Brown, Campbell, Edmunds, McPherson, Marshall, Potter and 1 more	2 hr
Aug 10, 12:15 PM MDT	Severe Thunderstorm Watch	SPC	Brown, Buffalo, Campbell, Clark, Codington, Corson and 19 more	7 hr
Aug 10, 2:45 PM MDT	Mesoscale Discussion	SPC	Brookings, Brown, Campbell, Clark, Codington, Day and 11 more	2 hr
Aug 10, 2:49 PM MDT	Mesoscale Discussion	SPC	Bennett, Dewey, Haakon, Hughes, Jackson, Jones and 7 more	56 min

Nearby

Mesoscale Discussions in Nebraska, 2016 Mesoscale Discussions in South Dakota, 2016 Mesoscale Discussions in Colorado, 2016 Every mesoscale discussion in 2016

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.