Alert archive / Nebraska / Mesoscale Discussions in 2018

Mesoscale Discussion 678

June 9, 201836 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 9, 2018, 1:16 AM CDT for 36 counties in Nebraska. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: Jun 9, 2018, 1:16 AM CDT (06:16 UTC)
Expired: Jun 9, 2018, 2:45 AM CDT
In force: 89 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

All 36 counties

Adams County, NE, Buffalo County, NE, Burt County, NE, Butler County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Dawson County, NE, Dodge County, NE, Fillmore County, NE, Franklin County, NE, Gosper County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Howard County, NE, Jefferson County, NE, Kearney County, NE, Lancaster County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Phelps County, NE, Platte County, NE, Polk County, NE, Saline County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Stanton County, NE, Thayer County, NE, Washington County, NE, Wayne County, NE, Webster County, NE, York County, NE

The radar

The Grand Island radar (KUEX), 96 km from the middle of the area, began a volume at 06:18 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

Omaha, NE (KOAX), launched 00:00Z, 6.3 hours before the alert went out and 122 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: 2133 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 1659 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 48 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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 8, 8:40 PM CDT	Mesoscale Discussion	SPC	Antelope, Blaine, Boyd, Brown, Cedar, Cherry and 7 more	95 min
Jun 8, 11:51 PM CDT	Mesoscale Discussion	SPC	Antelope, Blaine, Boone, Boyd, Brown, Buffalo and 31 more	84 min
Jun 9, 2:51 AM CDT	Mesoscale Discussion	SPC	Burt, Butler, Cass, Colfax, Cuming, Dakota and 26 more	114 min

Nearby

Mesoscale Discussions in Nebraska, 2018 Every mesoscale discussion in 2018

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.