Alert archive / Missouri / Mesoscale Discussions in 2011
Mesoscale Discussion 1887
The Storm Prediction Center issued this mesoscale discussion at Aug 7, 2011, 3:16 PM CDT for 13 counties in Kansas; 30 counties in Missouri. It was in force for 119 min.
The area
The outline as issued.
The facts
- Issued
- Aug 7, 2011, 3:16 PM CDT (20:16 UTC)
- Expired
- Aug 7, 2011, 5:15 PM CDT
- In force
- 119 min
- Issued by
- the Storm Prediction Center
All 43 counties
Allen County, KS, Anderson County, KS, Bourbon County, KS, Coffey County, KS, Crawford County, KS, Douglas County, KS, Franklin County, KS, Johnson County, KS, Leavenworth County, KS, Linn County, KS, Miami County, KS, Woodson County, KS, Wyandotte County, KS, Barton County, MO, Bates County, MO, Benton County, MO, Camden County, MO, Carroll County, MO, Cass County, MO, Cedar County, MO, Clay County, MO, Clinton County, MO, Cole County, MO, Cooper County, MO, Dade County, MO, Dallas County, MO, Greene County, MO, Henry County, MO, Hickory County, MO, Jackson County, MO, Johnson County, MO, Laclede County, MO, Lafayette County, MO, Miller County, MO, Moniteau County, MO, Morgan County, MO, Pettis County, MO, Platte County, MO, Polk County, MO, Ray County, MO, Saline County, MO, St. Clair County, MO, Vernon County, MO
The radar
The Pleasant Hill radar (KEAX), 45 km from the middle of the area, began a volume at 20:16 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, 8.3 hours before the alert went out and 117 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, 10:48 AM CDT | Mesoscale Discussion | SPC | Anderson, Atchison, Barton, Chase, Clay, Cloud and 33 more | 117 min |
| 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, 3:29 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 |
Nearby
Mesoscale Discussions in Missouri, 2011Mesoscale Discussions in Kansas, 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.