Alert archive / Nebraska / Mesoscale Discussions in 2020
Mesoscale Discussion 1282
The Storm Prediction Center issued this mesoscale discussion at Jul 19, 2020, 2:50 PM MDT for 4 states. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- Jul 19, 2020, 2:50 PM MDT (20:50 UTC)
- Expired
- Jul 19, 2020, 4:45 PM MDT
- In force
- 115 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch possible
- Chance of a watch
- 60%
All 33 counties
Logan County, CO, Phillips County, CO, Sedgwick County, CO, Yuma County, CO, Arthur County, NE, Banner County, NE, Box Butte County, NE, Chase County, NE, Cheyenne County, NE, Dawes County, NE, Deuel County, NE, Dundy County, NE, Garden County, NE, Grant County, NE, Hayes County, NE, Hooker County, NE, Keith County, NE, Kimball County, NE, Lincoln County, NE, McPherson County, NE, Morrill County, NE, Perkins County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Custer County, SD, Fall River County, SD, Campbell County, WY, Converse County, WY, Goshen County, WY, Niobrara County, WY, Platte County, WY, Weston County, WY
The radar
The Cheyenne radar (KCYS), 164 km from the middle of the area, began a volume at 20:53 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
Denver, CO (KDNR), launched 12:00Z, 8.8 hours before the alert went out and 275 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
- 246 J/kg
- Mixed-layer CIN
- -360 J/kg
- Mixed-layer LCL
- 1762 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 2 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 |
|---|---|---|---|---|
| Jul 19, 12:36 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Broomfield, Crowley, Denver, Douglas and 9 more | 114 min |
| Jul 19, 4:06 PM MDT | Severe Thunderstorm Watch | SPC | Logan, Morgan, Phillips, Sedgwick, Washington, Yuma | 7 hr |
| Jul 18, 8:49 PM MDT | Mesoscale Discussion | SPC | Franklin, Nuckolls, Thayer, Webster | 86 min |
Nearby
Mesoscale Discussions in Nebraska, 2020Mesoscale Discussions in Wyoming, 2020Mesoscale Discussions in Colorado, 2020Every 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.