Alert archive / Indiana / Mesoscale Discussions in 2011
Mesoscale Discussion 1907
The Storm Prediction Center issued this mesoscale discussion at Aug 8, 2011, 7:27 PM CDT for 13 counties in Illinois; 22 counties in Indiana. It was in force for 93 min.
The area
The outline as issued.
The facts
- Issued
- Aug 8, 2011, 7:27 PM CDT (00:27 UTC)
- Expired
- Aug 8, 2011, 9:00 PM CDT
- In force
- 93 min
- Issued by
- the Storm Prediction Center
All 35 counties
Champaign County, IL, DeWitt County, IL, Ford County, IL, Iroquois County, IL, Kankakee County, IL, Livingston County, IL, Logan County, IL, Mason County, IL, McLean County, IL, Menard County, IL, Piatt County, IL, Tazewell County, IL, Vermilion County, IL, Benton County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, Fountain County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Howard County, IN, Jasper County, IN, Madison County, IN, Marion County, IN, Miami County, IN, Montgomery County, IN, Newton County, IN, Pulaski County, IN, Tippecanoe County, IN, Tipton County, IN, Warren County, IN, White County, IN
The radar
The Indianapolis radar (KIND), 114 km from the middle of the area, began a volume at 00:29 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
Lincoln, IL (KILX), launched 00:00Z, 0.5 hours before the alert went out and 108 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
- 517 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 1569 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 131 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 3.6
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 9, 12:17 PM CDT | Mesoscale Discussion | SPC | Champaign, Christian, Coles, DeWitt, Douglas, Edgar and 14 more | 58 min |
| Aug 9, 2:28 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Allen, Bartholomew, Blackford, Boone, Brown and 54 more | 7 hr |
| Aug 9, 5:35 PM CDT | Mesoscale Discussion | SPC | Adams, Blackford, Boone, Delaware, Fayette, Hamilton and 9 more | 85 min |
Nearby
Mesoscale Discussions in Indiana, 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.