Alert archive / Nebraska / Mesoscale Discussions in 2019

Mesoscale Discussion 957

June 2, 201913 counties in Nebraska; 6 counties in South Dakota; 4 counties in Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jun 2, 2019, 5:46 PM MDT for 13 counties in Nebraska; 6 counties in South Dakota; 4 counties in Wyoming. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: Jun 2, 2019, 5:46 PM MDT (23:46 UTC)
Expired: Jun 2, 2019, 7:15 PM MDT
In force: 89 min
Issued by: the Storm Prediction Center

All 23 counties

Arthur County, NE, Banner County, NE, Box Butte County, NE, Cherry County, NE, Cheyenne County, NE, Dawes 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, Fall River County, SD, Jackson County, SD, Mellette County, SD, Oglala Lakota County, SD, Todd County, SD, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 190 km from the middle of the area, began a volume at 23:48 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 12:00Z, 11.8 hours before the alert went out and 196 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: 18 J/kg
Mixed-layer CIN: -229 J/kg
Mixed-layer LCL: 1564 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 110 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 2, 3:37 PM MDT	Mesoscale Discussion	SPC	Dawes, Sheridan	53 min
Jun 2, 3:59 PM MDT	Severe Thunderstorm Watch	SPC	Arthur, Banner, Box Butte, Cherry, Cheyenne, Dawes and 12 more	7 hr
Jun 2, 5:24 PM MDT	Mesoscale Discussion	SPC	Chase, Deuel, Dundy, Perkins	66 min
Jun 2, 10:57 AM MDT	Mesoscale Discussion	SPC	Laramie	2 hr
Jun 2, 12:11 PM MDT	Severe Thunderstorm Watch	SPC	Albany, Converse, Goshen, Laramie, Niobrara, Platte	8 hr
Jun 2, 2:26 PM MDT	Mesoscale Discussion	SPC	Albany, Converse, Goshen, Laramie, Niobrara, Platte	2 hr

Nearby

Mesoscale Discussions in Nebraska, 2019 Mesoscale Discussions in South Dakota, 2019 Mesoscale Discussions in Wyoming, 2019 Every mesoscale discussion in 2019

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.