Alert archive / Nebraska / Mesoscale Discussions in 2017
Mesoscale Discussion 465
The Storm Prediction Center issued this mesoscale discussion at Apr 9, 2017, 1:20 PM MDT for Yuma County, Colorado; 6 counties in Kansas; 33 counties in Nebraska. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 9, 2017, 1:20 PM MDT (19:20 UTC)
- Expired
- Apr 9, 2017, 3:45 PM MDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 40 counties
Yuma County, CO, Cheyenne County, KS, Decatur County, KS, Norton County, KS, Phillips County, KS, Rawlins County, KS, Smith County, KS, Adams County, NE, Arthur County, NE, Blaine County, NE, Buffalo County, NE, Chase County, NE, Custer County, NE, Dawson County, NE, Dundy County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Hooker County, NE, Howard County, NE, Kearney County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Perkins County, NE, Phelps County, NE, Red Willow County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Webster County, NE
The radar
The Grand Island radar (KUEX), 141 km from the middle of the area, began a volume at 19:20 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 7.3 hours before the alert went out and 69 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1407 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 266 m²/s²
- 0-3 km storm-relative helicity
- 305 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 2:48 PM MDT | Mesoscale Discussion | SPC | Butler, Chase, Chautauqua, Coffey, Cowley, Dickinson and 23 more | 2 hr |
| Apr 9, 4:35 PM MDT | Mesoscale Discussion | SPC | Adams, Buffalo, Clay, Dawson, Fillmore, Franklin and 8 more | 25 min |
| Apr 9, 4:44 PM MDT | Severe Thunderstorm Watch | SPC | Adams, Buffalo, Clay, Dawson, Fillmore, Franklin and 12 more | 3 hr |
Nearby
Mesoscale Discussions in Nebraska, 2017Mesoscale Discussions in Kansas, 2017Mesoscale Discussions in Colorado, 2017Every mesoscale discussion in 2017
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.