Alert archive / Nebraska / Mesoscale Discussions in 2011
Mesoscale Discussion 1582
The Storm Prediction Center issued this mesoscale discussion at Jul 11, 2011, 4:01 PM MDT for Cherry County, Dawes County, Sheridan County, Nebraska; Fall River County, South Dakota; Niobrara County, Wyoming. It was in force for 29 min.
The area
The outline as issued.
The facts
- Issued
- Jul 11, 2011, 4:01 PM MDT (22:01 UTC)
- Expired
- Jul 11, 2011, 4:30 PM MDT
- In force
- 29 min
- Issued by
- the Storm Prediction Center
Counties Cherry County, NE, Dawes County, NE, Sheridan County, NE, Fall River County, SD, Niobrara County, WY
The radar
The Rapid City radar (KUDX), 150 km from the middle of the area, began a volume at 22:02 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, 10.0 hours before the alert went out and 145 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
- 1860 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- -49 m²/s²
- 0-3 km storm-relative helicity
- 74 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Jul 10, 6:21 PM MDT | Mesoscale Discussion | SPC | Adams, Blaine, Brown, Buffalo, Chase, Custer and 29 more | 84 min |
| Jul 10, 6:24 PM MDT | Severe Thunderstorm Watch | SPC | Adams, Blaine, Boyd, Brown, Buffalo, Chase and 38 more | 6 hr |
| Jul 10, 9:27 PM MDT | Mesoscale Discussion | SPC | Antelope, Boone, Buffalo, Burt, Butler, Cedar and 27 more | 63 min |
| Jul 10, 9:57 PM MDT | Severe Thunderstorm Watch | SPC | Antelope, Boone, Burt, Butler, Cedar, Colfax and 14 more | 4 hr |
| Jul 10, 10:56 PM MDT | Severe Thunderstorm Watch | SPC | Dakota, Dixon | 4 hr |
| Jul 11, 1:50 PM MDT | Mesoscale Discussion | SPC | Arthur, Banner, Box Butte, Cheyenne, Dawes, Deuel and 8 more | 85 min |
| Jul 11, 2:07 PM MDT | Severe Thunderstorm Watch | SPC | Banner, Box Butte, Cheyenne, Dawes, Deuel, Garden and 5 more | 7 hr |
| Jul 11, 4:06 PM MDT | Tornado Watch | SPC | Box Butte, Cherry, Dawes, Sheridan, Sioux | 5 hr |
Nearby
Mesoscale Discussions in Nebraska, 2011Mesoscale Discussions in South Dakota, 2011Mesoscale Discussions in Wyoming, 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.