Alert archive / Nebraska / Mesoscale Discussions in 2011
Mesoscale Discussion 1898
The Storm Prediction Center issued this mesoscale discussion at Aug 8, 2011, 2:41 AM CDT for 29 counties in Nebraska. It was in force for 34 min.
The area
The outline as issued.
The facts
- Issued
- Aug 8, 2011, 2:41 AM CDT (07:41 UTC)
- Expired
- Aug 8, 2011, 3:15 AM CDT
- In force
- 34 min
- Issued by
- the Storm Prediction Center
All 29 counties
Adams County, NE, Buffalo County, NE, Butler County, NE, Cass County, NE, Clay County, NE, Fillmore County, NE, Gage County, NE, Hall County, NE, Hamilton County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Lancaster County, NE, Merrick County, NE, Nance County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Platte County, NE, Polk County, NE, Saline County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Thayer County, NE, Webster County, NE, York County, NE
The radar
The Grand Island radar (KUEX), 59 km from the middle of the area, began a volume at 07:44 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 nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 7.7 hours before the alert went out and 155 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
- 1873 J/kg
- Mixed-layer CIN
- -119 J/kg
- Mixed-layer LCL
- 1289 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 3.1
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 |
|---|---|---|---|---|
| Aug 7, 7:49 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Antelope, Blaine, Boone, Boyd, Brown and 60 more | 7 hr |
| Aug 7, 10:28 PM CDT | Mesoscale Discussion | SPC | Antelope, Boone, Burt, Butler, Cass, Cedar and 30 more | 2 hr |
| Aug 8, 3:09 PM CDT | Mesoscale Discussion | SPC | Arthur, Blaine, Box Butte, Custer, Dawes, Garden and 11 more | 66 min |
| Aug 8, 4:52 PM CDT | Severe Thunderstorm Watch | SPC | Arthur, Box Butte, Chase, Cherry, Cheyenne, Dawes and 19 more | 6 hr |
| Aug 8, 6:27 PM CDT | Mesoscale Discussion | SPC | Arthur, Box Butte, Chase, Cheyenne, Dawes, Dawson and 21 more | 2 hr |
| Aug 8, 6:44 PM CDT | Severe Thunderstorm Watch | SPC | Dawson, Furnas, Gosper, Harlan, Phelps | 4 hr |
Nearby
Mesoscale Discussions in Nebraska, 2011Every mesoscale discussion in 2011
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.