Alert archive / Indiana / Mesoscale Discussions in 2012
Mesoscale Discussion 1726
The Storm Prediction Center issued this mesoscale discussion at Aug 9, 2012, 3:16 PM CDT for 12 counties in Illinois; 25 counties in Indiana. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- Aug 9, 2012, 3:16 PM CDT (20:16 UTC)
- Expired
- Aug 9, 2012, 4:45 PM CDT
- In force
- 89 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 37 counties
Champaign County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Ford County, IL, Iroquois County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, McLean County, IL, Piatt County, IL, Vermilion County, IL, Benton County, IN, Blackford County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, Delaware County, IN, Fountain County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Madison County, IN, Marion County, IN, Montgomery County, IN, Morgan County, IN, Parke County, IN, Putnam County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Warren County, IN, White County, IN
The radar
The Indianapolis radar (KIND), 124 km from the middle of the area, began a volume at 20:17 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
Lincoln, IL (KILX), launched 12:00Z, 8.3 hours before the alert went out and 96 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
- 396 J/kg
- Mixed-layer CIN
- -236 J/kg
- Mixed-layer LCL
- 1480 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 88 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 |
|---|---|---|---|---|
| Aug 9, 4:02 PM CDT | Severe Thunderstorm Watch | SPC | Champaign, Coles, DeWitt, Douglas, Edgar, Ford and 8 more | 4 hr |
| Aug 9, 5:11 PM CDT | Mesoscale Discussion | SPC | Hancock, Henderson, Henry, Knox, McDonough, Mercer and 4 more | 94 min |
| Aug 9, 3:18 PM CDT | Mesoscale Discussion | SPC | Ohio, Switzerland | 57 min |
Nearby
Mesoscale Discussions in Indiana, 2012Mesoscale Discussions in Illinois, 2012Every mesoscale discussion in 2012
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.