Alert archive / Indiana / Mesoscale Discussions in 2012
Mesoscale Discussion 1980
The Storm Prediction Center issued this mesoscale discussion at Sep 21, 2012, 6:30 PM CDT for 16 counties in Illinois; 30 counties in Indiana; 7 counties in Ohio. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 21, 2012, 6:30 PM CDT (23:30 UTC)
- Expired
- Sep 21, 2012, 9:00 PM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 53 counties
Clark County, IL, Clay County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Douglas County, IL, Edgar County, IL, Edwards County, IL, Effingham County, IL, Jasper County, IL, Lawrence County, IL, Moultrie County, IL, Richland County, IL, Shelby County, IL, Wabash County, IL, Wayne County, IL, Bartholomew County, IN, Boone County, IN, Brown County, IN, Clay County, IN, Dearborn County, IN, Decatur County, IN, Fayette County, IN, Franklin County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Johnson County, IN, Knox County, IN, Marion County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Ripley County, IN, Rush County, IN, Shelby County, IN, Sullivan County, IN, Union County, IN, Vermillion County, IN, Vigo County, IN, Wayne County, IN, Butler County, OH, Clinton County, OH, Greene County, OH, Hamilton County, OH, Montgomery County, OH, Preble County, OH, Warren County, OH
The radar
The Indianapolis radar (KIND), 70 km from the middle of the area, began a volume at 23:30 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 12:00Z, 11.5 hours before the alert went out and 193 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2528 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 152 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 |
|---|---|---|---|---|
| Sep 21, 1:36 PM CDT | Mesoscale Discussion | SPC | Bureau, Cass, Champaign, Christian, Clark, Clay and 40 more | 84 min |
| Sep 21, 4:59 PM CDT | Mesoscale Discussion | SPC | Bond, Clay, Clinton, Crawford, Cumberland, Edwards and 23 more | 91 min |
Nearby
Mesoscale Discussions in Indiana, 2012Mesoscale Discussions in Illinois, 2012Mesoscale Discussions in Ohio, 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.