Alert archive / Nebraska / Mesoscale Discussions in 2020
Mesoscale Discussion 682
The Storm Prediction Center issued this mesoscale discussion at May 23, 2020, 12:48 PM MDT for 8 counties in Nebraska; 7 counties in South Dakota; 6 counties in Wyoming. It was in force for 117 min.
The area
The outline as issued.
The facts
- Issued
- May 23, 2020, 12:48 PM MDT (18:48 UTC)
- Expired
- May 23, 2020, 2:45 PM MDT
- In force
- 117 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch likely
- Chance of a watch
- 80%
All 21 counties
Banner County, NE, Box Butte County, NE, Dawes County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Butte County, SD, Custer County, SD, Fall River County, SD, Lawrence County, SD, Meade County, SD, Oglala Lakota County, SD, Pennington County, SD, 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), 118 km from the middle of the area, began a volume at 18:48 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 (KUNR), launched 12:00Z, 6.8 hours before the alert went out and 111 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
- 2587 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- -114 m²/s²
- 0-3 km storm-relative helicity
- -150 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 |
|---|---|---|---|---|
| May 23, 1:15 PM MDT | Severe Thunderstorm Watch | SPC | Arthur, Banner, Box Butte, Chase, Cherry, Cheyenne and 11 more | 7 hr |
| May 23, 2:18 PM MDT | Mesoscale Discussion | SPC | Chase, Dundy | 117 min |
| May 23, 2:57 PM MDT | Mesoscale Discussion | SPC | Arthur, Banner, Box Butte, Chase, Cheyenne, Dawes and 10 more | 93 min |
| May 23, 4:35 PM MDT | Mesoscale Discussion | SPC | Dundy, Frontier, Furnas, Gosper, Hayes, Hitchcock and 1 more | 55 min |
| May 23, 4:40 PM MDT | Tornado Watch | SPC | Dundy, Hitchcock, Red Willow | 3 hr |
| May 23, 5:27 PM MDT | Mesoscale Discussion | SPC | Arthur, Banner, Box Butte, Cheyenne, Dawes, Deuel and 9 more | 93 min |
Nearby
Mesoscale Discussions in Nebraska, 2020Mesoscale Discussions in South Dakota, 2020Mesoscale Discussions in Wyoming, 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.