Alert archive / Indiana / Mesoscale Discussions in 2011
Mesoscale Discussion 1972
The Storm Prediction Center issued this mesoscale discussion at Aug 13, 2011, 6:10 PM CDT for 4 states. It was in force for 95 min.
The area
The outline as issued.
The facts
- Issued
- Aug 13, 2011, 6:10 PM CDT (23:10 UTC)
- Expired
- Aug 13, 2011, 7:45 PM CDT
- In force
- 95 min
- Issued by
- the Storm Prediction Center
All 66 counties
Clark County, IL, Coles County, IL, Cumberland County, IL, Douglas County, IL, Edgar County, IL, Shelby County, IL, Vermilion County, IL, Adams County, IN, Allen County, IN, Benton County, IN, Blackford County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clay County, IN, Clinton County, IN, DeKalb County, IN, Delaware County, IN, Elkhart County, IN, Fountain County, IN, Fulton County, IN, Grant County, IN, Hamilton County, IN, Hendricks County, IN, Howard County, IN, Huntington County, IN, Jay County, IN, Kosciusko County, IN, LaGrange County, IN, Madison County, IN, Marion County, IN, Marshall County, IN, Miami County, IN, Montgomery County, IN, Noble County, IN, Parke County, IN, Pulaski County, IN, Putnam County, IN, Steuben County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Vigo County, IN, Wabash County, IN, Warren County, IN, Wells County, IN, White County, IN, Whitley County, IN, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Monroe County, MI, Oakland County, MI, Saint Clair County, MI, Washtenaw County, MI, Wayne County, MI, Defiance County, OH, Fulton County, OH, Henry County, OH, Lucas County, OH, Mercer County, OH, Paulding County, OH, Putnam County, OH, Van Wert County, OH, Williams County, OH, Wood County, OH
The radar
The Northern Indiana radar (KIWX), 49 km from the middle of the area, began a volume at 23:12 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
Detroit, MI (KDTX), launched 12:00Z, 11.2 hours before the alert went out and 216 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
- 4981 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 133 m²/s²
- 0-3 km storm-relative helicity
- 132 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 13, 11:45 AM CDT | Mesoscale Discussion | SPC | Bureau, Champaign, Cook, DeKalb, DuPage, Ford and 16 more | 60 min |
| Aug 13, 12:12 PM CDT | Severe Thunderstorm Watch | SPC | Champaign, Christian, Clark, Coles, Cook, Cumberland and 32 more | 9 hr |
| Aug 13, 3:29 PM CDT | Mesoscale Discussion | SPC | Bond, Champaign, Christian, Clark, Clay, Clinton and 21 more | 91 min |
| Aug 13, 4:53 PM CDT | Mesoscale Discussion | SPC | Bartholomew, Boone, Brown, Clay, Daviess, Decatur and 26 more | 37 min |
| Aug 13, 4:57 PM CDT | Severe Thunderstorm Watch | SPC | Bartholomew, Boone, Brown, Clay, Daviess, Decatur and 26 more | 7 hr |
| Aug 13, 5:30 PM CDT | Mesoscale Discussion | SPC | Clark, Floyd, Ohio, Switzerland | 90 min |
| Aug 13, 4:28 PM CDT | Severe Thunderstorm Watch | SPC | Genesee, Lapeer, Lenawee, Livingston, Macomb, Monroe and 5 more | 4 hr |
Nearby
Mesoscale Discussions in Indiana, 2011Mesoscale Discussions in Ohio, 2011Mesoscale Discussions in Michigan, 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.