Alert archive / Nebraska / Mesoscale Discussions in 2017
Mesoscale Discussion 1163
The Storm Prediction Center issued this mesoscale discussion at Jun 27, 2017, 2:04 PM MDT for 11 counties in Nebraska; 6 counties in South Dakota; 8 counties in Wyoming. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 27, 2017, 2:04 PM MDT (20:04 UTC)
- Expired
- Jun 27, 2017, 4:30 PM MDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 25 counties
Banner County, NE, Box Butte County, NE, Cheyenne County, NE, Dawes County, NE, Deuel County, NE, Garden County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Custer County, SD, Fall River County, SD, Lawrence County, SD, Meade County, SD, Oglala Lakota County, SD, Pennington County, SD, Campbell County, WY, Converse County, WY, Crook County, WY, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY, Weston County, WY
The radar
The Rapid City radar (KUDX), 169 km from the middle of the area, began a volume at 20:05 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
Rapid City, SD (KRAP), launched 12:00Z, 8.1 hours before the alert went out and 162 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
- 261 J/kg
- Mixed-layer CIN
- -565 J/kg
- Mixed-layer LCL
- 1654 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 171 m²/s²
- 0-3 km storm-relative helicity
- 151 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
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 |
|---|---|---|---|---|
| Jun 27, 2:48 PM MDT | Mesoscale Discussion | SPC | Chase, Dundy, Hitchcock | 117 min |
| Jun 27, 4:07 PM MDT | Severe Thunderstorm Watch | SPC | Arthur, Blaine, Brown, Chase, Cherry, Custer and 16 more | 6 hr |
| Jun 27, 1:21 PM MDT | Mesoscale Discussion | SPC | Big Horn, Fremont, Hot Springs, Johnson, Lincoln, Natrona and 5 more | 84 min |
Nearby
Mesoscale Discussions in Nebraska, 2017Mesoscale Discussions in Wyoming, 2017Mesoscale Discussions in South Dakota, 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.