Alert archive / Nebraska / Mesoscale Discussions in 2018
Mesoscale Discussion 385
The Storm Prediction Center issued this mesoscale discussion at May 11, 2018, 1:13 AM CDT for 13 counties in Nebraska. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- May 11, 2018, 1:13 AM CDT (06:13 UTC)
- Expired
- May 11, 2018, 2:45 AM CDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
Counties Butler County, NE, Cass County, NE, Douglas County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Otoe County, NE, Pawnee County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE
The radar
The Omaha radar (KOAX), 57 km from the middle of the area, began a volume at 06:15 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
Topeka, KS (KFOE), launched 00:00Z, 6.2 hours before the alert went out and 230 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
- 577 J/kg
- Mixed-layer CIN
- -121 J/kg
- Mixed-layer LCL
- 2178 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 118 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
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 10, 7:06 PM CDT | Mesoscale Discussion | SPC | Dundy | 114 min |
| May 10, 7:39 PM CDT | Mesoscale Discussion | SPC | Adams, Arthur, Blaine, Buffalo, Chase, Custer and 25 more | 2 hr |
| May 10, 7:59 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Arthur, Blaine, Brown, Buffalo, Chase and 40 more | 9 hr |
| May 10, 11:16 PM CDT | Mesoscale Discussion | SPC | Adams, Antelope, Boone, Buffalo, Chase, Custer and 19 more | 89 min |
| May 11, 1:50 AM CDT | Severe Thunderstorm Watch | SPC | Butler, Cass, Gage, Jefferson, Johnson, Lancaster and 6 more | 3 hr |
| May 11, 4:24 AM CDT | Mesoscale Discussion | SPC | Adams, Butler, Cass, Clay, Colfax, Douglas and 22 more | 66 min |
| May 11, 3:02 PM CDT | Severe Thunderstorm Watch | SPC | Banner, Kimball, Scotts Bluff, Sioux | 7 hr |
| May 11, 6:39 PM CDT | Mesoscale Discussion | SPC | Banner, Kimball, Scotts Bluff, Sioux | 96 min |
Nearby
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.