Alert archive / Missouri / Mesoscale Discussions in 2011
Mesoscale Discussion 1218
The Storm Prediction Center issued this mesoscale discussion at Jun 14, 2011, 2:56 PM CDT for 8 counties in Illinois; 16 counties in Iowa; 50 counties in Missouri. It was in force for 94 min.
The area
The outline as issued.
The facts
- Issued
- Jun 14, 2011, 2:56 PM CDT (19:56 UTC)
- Expired
- Jun 14, 2011, 4:30 PM CDT
- In force
- 94 min
- Issued by
- the Storm Prediction Center
All 74 counties
Adair County, IA, Adams County, IA, Appanoose County, IA, Clarke County, IA, Davis County, IA, Decatur County, IA, Lucas County, IA, Madison County, IA, Monroe County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA, Adams County, IL, Brown County, IL, Calhoun County, IL, Greene County, IL, Hancock County, IL, Jersey County, IL, Pike County, IL, Scott County, IL, Adair County, MO, Andrew County, MO, Audrain County, MO, Boone County, MO, Caldwell County, MO, Callaway County, MO, Carroll County, MO, Chariton County, MO, City of Saint Louis, MO, Clark County, MO, Clinton County, MO, Cole County, MO, Cooper County, MO, Daviess County, MO, DeKalb County, MO, Franklin County, MO, Gasconade County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Howard County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Maries County, MO, Marion County, MO, Mercer County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Nodaway County, MO, Osage County, MO, Pike County, MO, Putnam County, MO, Ralls County, MO, Randolph County, MO, Saint Charles County, MO, Saint Louis County, MO, Saline County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO, Warren County, MO, Worth County, MO
The radar
The Pleasant Hill radar (KEAX), 153 km from the middle of the area, began a volume at 20:02 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
Topeka, KS (KTOP), launched 12:00Z, 7.9 hours before the alert went out and 239 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
- 1833 J/kg
- Mixed-layer CIN
- -425 J/kg
- Mixed-layer LCL
- 1349 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 391 m²/s²
- 0-3 km storm-relative helicity
- 486 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.3
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 |
|---|---|---|---|---|
| Jun 13, 9:23 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Cass, Fulton, Hancock, Henderson and 8 more | 97 min |
| Jun 13, 11:57 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Calhoun, Cass, Fulton, Greene and 15 more | 93 min |
| Jun 14, 3:21 AM CDT | Mesoscale Discussion | SPC | Adams, Brown, Hancock, McDonough, Schuyler, Scott | 3 hr |
| Jun 14, 3:53 PM CDT | Tornado Watch | SPC | Adair, Adams, Appanoose, Audubon, Cass, Clarke and 13 more | 8 hr |
Nearby
Mesoscale Discussions in Missouri, 2011Mesoscale Discussions in Iowa, 2011Mesoscale Discussions in Illinois, 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.