Alert archive / Kansas / Mesoscale Discussions in 2011
Mesoscale Discussion 1879
The Storm Prediction Center issued this mesoscale discussion at Aug 7, 2011, 10:48 AM CDT for 39 counties in Kansas; Platte County, Missouri; Nuckolls County, Thayer County, Nebraska. It was in force for 117 min.
The area
The outline as issued.
The facts
- Issued
- Aug 7, 2011, 10:48 AM CDT (15:48 UTC)
- Expired
- Aug 7, 2011, 12:45 PM CDT
- In force
- 117 min
- Issued by
- the Storm Prediction Center
All 42 counties
Anderson County, KS, Atchison County, KS, Barton County, KS, Chase County, KS, Clay County, KS, Cloud County, KS, Coffey County, KS, Dickinson County, KS, Douglas County, KS, Ellsworth County, KS, Franklin County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Jewell County, KS, Johnson County, KS, Leavenworth County, KS, Lincoln County, KS, Lyon County, KS, Marion County, KS, Marshall County, KS, McPherson County, KS, Miami County, KS, Mitchell County, KS, Morris County, KS, Nemaha County, KS, Osage County, KS, Osborne County, KS, Ottawa County, KS, Pottawatomie County, KS, Republic County, KS, Rice County, KS, Riley County, KS, Russell County, KS, Saline County, KS, Shawnee County, KS, Wabaunsee County, KS, Washington County, KS, Wyandotte County, KS, Platte County, MO, Nuckolls County, NE, Thayer County, NE
The radar
The Topeka radar (KTWX), 54 km from the middle of the area, began a volume at 15:47 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 (KTOP), launched 12:00Z, 3.8 hours before the alert went out and 102 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
- 185 J/kg
- Mixed-layer CIN
- -540 J/kg
- Mixed-layer LCL
- 1321 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 190 m²/s²
- 0-3 km storm-relative helicity
- 264 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
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, 12:55 PM CDT | Severe Thunderstorm Watch | SPC | Atchison, Douglas, Jackson, Jefferson, Johnson, Leavenworth and 6 more | 5 hr |
| Aug 7, 2:21 PM CDT | Mesoscale Discussion | SPC | Clark, Comanche, Haskell, Meade, Seward, Stevens | 114 min |
| Aug 7, 3:16 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Coffey, Crawford, Douglas and 7 more | 119 min |
| Aug 7, 3:29 PM CDT | Severe Thunderstorm Watch | SPC | Bourbon, Crawford | 6 hr |
| Aug 7, 5:20 PM CDT | Mesoscale Discussion | SPC | Allen, Bourbon, Cherokee, Crawford, Labette, Montgomery and 3 more | 115 min |
| Aug 7, 6:07 PM CDT | Severe Thunderstorm Watch | SPC | Chautauqua, Cherokee, Elk, Labette, Montgomery, Neosho and 1 more | 5 hr |
| Aug 6, 8:10 PM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, Daviess, DeKalb, Gentry, Grundy and 8 more | 2 hr |
| Aug 6, 10:14 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Chariton, Clark, Grundy, Knox, Lewis and 14 more | 5 hr |
| Aug 6, 11:06 PM CDT | Mesoscale Discussion | SPC | Adair, Clark, Gentry, Grundy, Harrison, Knox and 11 more | 114 min |
| Aug 7, 5:41 PM CDT | Severe Thunderstorm Watch | SPC | Bollinger, Butler, Cape Girardeau, Carter, Franklin, Iron and 17 more | 6 hr |
| Aug 7, 1:23 PM CDT | Mesoscale Discussion | SPC | Arthur, Blaine, Brown, Cherry, Custer, Grant and 5 more | 67 min |
| Aug 7, 2:58 PM CDT | Severe Thunderstorm Watch | SPC | Arthur, Blaine, Brown, Buffalo, Cherry, Custer and 21 more | 8 hr |
| Aug 7, 6:35 PM CDT | Mesoscale Discussion | SPC | Adams, Arthur, Blaine, Boyd, Brown, Buffalo and 25 more | 115 min |
Nearby
Mesoscale Discussions in Kansas, 2011Mesoscale Discussions in Nebraska, 2011Mesoscale Discussions in Missouri, 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.