Alert archive / Illinois / Mesoscale Discussions in 2017
Mesoscale Discussion 1275
The Storm Prediction Center issued this mesoscale discussion at Jul 10, 2017, 6:46 AM CDT for 23 counties in Illinois; 6 counties in Indiana. It was in force for 119 min.
The area
The outline as issued.
The facts
- Issued
- Jul 10, 2017, 6:46 AM CDT (11:46 UTC)
- Expired
- Jul 10, 2017, 8:45 AM CDT
- In force
- 119 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 29 counties
Champaign County, IL, Coles County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Ford County, IL, Fulton County, IL, Iroquois County, IL, Kankakee County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Marshall County, IL, Mason County, IL, McLean County, IL, Menard County, IL, Moultrie County, IL, Peoria County, IL, Piatt County, IL, Schuyler County, IL, Tazewell County, IL, Vermilion County, IL, Woodford County, IL, Benton County, IN, Fountain County, IN, Newton County, IN, Parke County, IN, Vermillion County, IN, Warren County, IN
The radar
The Lincoln radar (KILX), 39 km from the middle of the area, began a volume at 11:48 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, 11.8 hours before the alert went out and 38 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
- 1927 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 1553 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 178 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 7.4
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, 2:48 PM CDT | Mesoscale Discussion | SPC | Bureau, Ford, Grundy, Iroquois, Kankakee, LaSalle and 8 more | 117 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 Illinois, 2017Mesoscale Discussions in Indiana, 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.