Alert archive / Nebraska / Mesoscale Discussions in 2018
Mesoscale Discussion 1300
The Storm Prediction Center issued this mesoscale discussion at Aug 15, 2018, 6:59 PM MDT for 17 counties in Nebraska. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- Aug 15, 2018, 6:59 PM MDT (00:59 UTC)
- Expired
- Aug 15, 2018, 8:30 PM MDT
- In force
- 91 min
- Issued by
- the Storm Prediction Center
Counties Arthur County, NE, Dawson County, NE, Frontier County, NE, Furnas County, NE, Garden County, NE, Gosper County, NE, Grant County, NE, Hayes County, NE, Hooker County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Perkins County, NE, Phelps County, NE, Red Willow County, NE, Thomas County, NE
The radar
The North Platte radar (KLNX), 102 km from the middle of the area, began a volume at 00:59 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
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.0 hours before the alert went out and 16 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.
- Mixed-layer CAPE
- 705 J/kg
- Mixed-layer CIN
- -65 J/kg
- Mixed-layer LCL
- 1824 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 94 m²/s²
- 0-3 km storm-relative helicity
- 207 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 6.9
The text
As transmitted.
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Mesoscale Discussions in Nebraska, 2018Every 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.