Alert archive / Indiana / Mesoscale Discussions in 2017
Mesoscale Discussion 1278
The Storm Prediction Center issued this mesoscale discussion at Jul 10, 2017, 2:48 PM CDT for 14 counties in Illinois; 27 counties in Indiana. It was in force for 117 min.
The area
The outline as issued.
The facts
- Issued
- Jul 10, 2017, 2:48 PM CDT (19:48 UTC)
- Expired
- Jul 10, 2017, 4:45 PM CDT
- In force
- 117 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 41 counties
Bureau County, IL, Ford County, IL, Grundy County, IL, Iroquois County, IL, Kankakee County, IL, LaSalle County, IL, Livingston County, IL, Marshall County, IL, McLean County, IL, Putnam County, IL, Stark County, IL, Vermilion County, IL, Will County, IL, Woodford 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, Fulton County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jasper County, IN, Madison County, IN, Miami County, IN, Montgomery County, IN, Newton County, IN, Pulaski County, IN, Tippecanoe County, IN, Tipton County, IN, Wabash County, IN, Warren County, IN, Wells County, IN, White County, IN
The radar
The Chicago radar (KLOT), 66 km from the middle of the area, began a volume at 19:50 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, 7.8 hours before the alert went out and 109 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
- 1522 J/kg
- Mixed-layer CIN
- -136 J/kg
- Mixed-layer LCL
- 1184 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 151 m²/s²
- 0-3 km storm-relative helicity
- 155 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.6
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 1:49 AM CDT | Mesoscale Discussion | SPC | Bureau, Carroll, Henderson, Henry, Jo Daviess, Knox and 5 more | 116 min |
| Jul 10, 6:46 AM CDT | Mesoscale Discussion | SPC | Champaign, Coles, DeWitt, Douglas, Edgar, Ford and 17 more | 119 min |
| Jul 10, 3:58 PM CDT | Severe Thunderstorm Watch | SPC | Bureau, Carroll, Champaign, Cook, DeKalb, DeWitt and 29 more | 7 hr |
| Jul 10, 6:18 PM CDT | Mesoscale Discussion | SPC | Bureau, Champaign, DeWitt, Ford, Fulton, Grundy and 21 more | 87 min |
Nearby
Mesoscale Discussions in Indiana, 2017Mesoscale Discussions in Illinois, 2017Every mesoscale discussion in 2017
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.