Alert archive / Nebraska / Mesoscale Discussions in 2020

Mesoscale Discussion 786

June 2, 20204 states

The Storm Prediction Center issued this mesoscale discussion at Jun 2, 2020, 6:35 PM MDT for 4 states. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: Jun 2, 2020, 6:35 PM MDT (00:35 UTC)
Expired: Jun 2, 2020, 8:00 PM MDT
In force: 85 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch unlikely
Chance of a watch: 20%

Counties Logan County, CO, Morgan County, CO, Banner County, NE, Box Butte County, NE, Cheyenne County, NE, Dawes County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sioux County, NE, Custer County, SD, Fall River County, SD, Campbell County, WY, Converse County, WY, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY, Weston County, WY

The radar

The Cheyenne radar (KCYS), 139 km from the middle of the area, began a volume at 00:34 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, 0.6 hours before the alert went out and 226 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: 50 J/kg
Mixed-layer CIN: -218 J/kg
Mixed-layer LCL: 1680 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 143 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
Jun 3, 1:05 PM MDT	Mesoscale Discussion	SPC	Cheyenne, Kit Carson, Lincoln, Phillips, Washington, Yuma	85 min
Jun 3, 12:35 PM MDT	Mesoscale Discussion	SPC	Keya Paha	85 min
Jun 3, 1:05 PM MDT	Severe Thunderstorm Watch	SPC	Blaine, Boyd, Brown, Cherry, Grant, Holt and 6 more	6 hr
Jun 3, 2:56 PM MDT	Mesoscale Discussion	SPC	Blaine, Brown, Cherry, Dawes, Grant, Holt and 6 more	2 hr
Jun 3, 4:53 PM MDT	Mesoscale Discussion	SPC	Adams, Blaine, Buffalo, Chase, Clay, Custer and 28 more	3 hr
Jun 3, 5:18 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Arthur, Buffalo, Chase, Clay, Custer and 33 more	6 hr

Nearby

Mesoscale Discussions in Nebraska, 2020 Mesoscale Discussions in Wyoming, 2020 Mesoscale Discussions in Colorado, 2020 Every mesoscale discussion in 2020

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.