Alert archive / Nebraska / Mesoscale Discussions in 2013
Mesoscale Discussion 794
The Storm Prediction Center issued this mesoscale discussion at May 24, 2013, 11:50 PM CDT for 28 counties in Nebraska. It was in force for 55 min.
The area
The outline as issued.
The facts
- Issued
- May 24, 2013, 11:50 PM CDT (04:50 UTC)
- Expired
- May 25, 2013, 12:45 AM CDT
- In force
- 55 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 28 counties
Adams County, NE, Boone County, NE, Buffalo County, NE, Clay County, NE, Custer County, NE, Dawson County, NE, Frontier County, NE, Furnas County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Howard County, NE, Kearney County, NE, Lincoln County, NE, Loup County, NE, Merrick County, NE, Nance County, NE, Phelps County, NE, Platte County, NE, Polk County, NE, Red Willow County, NE, Sherman County, NE, Valley County, NE, Wheeler County, NE, York County, NE
The radar
The Grand Island radar (KUEX), 94 km from the middle of the area, began a volume at 04:51 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 00:00Z, 4.8 hours before the alert went out and 148 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
- 1521 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 1551 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 269 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 9.2
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 7:54 PM CDT | Mesoscale Discussion | SPC | Arthur, Chase, Cheyenne, Deuel, Dundy, Frontier and 12 more | 81 min |
| May 25, 12:04 AM CDT | Severe Thunderstorm Watch | SPC | Adams, Boone, Buffalo, Butler, Clay, Dawson and 20 more | 4 hr |
| May 25, 3:27 PM CDT | Mesoscale Discussion | SPC | Arthur, Banner, Box Butte, Chase, Cheyenne, Dawes and 19 more | 93 min |
| May 25, 5:11 PM CDT | Severe Thunderstorm Watch | SPC | Dundy, Hitchcock, Red Willow | 6 hr |
| May 25, 6:50 PM CDT | Mesoscale Discussion | SPC | Adams, Buffalo, Dawson, Franklin, Frontier, Gosper and 8 more | 85 min |
Nearby
Mesoscale Discussions in Nebraska, 2013Every mesoscale discussion in 2013
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.