Alert archive / Illinois / Mesoscale Discussions in 2022
Mesoscale Discussion 147
The Storm Prediction Center issued this mesoscale discussion at Feb 17, 2022, 3:17 PM CST for 36 counties in Illinois; Lake County, Indiana. It was in force for 118 min.
The area
The outline as issued.
The facts
- Issued
- Feb 17, 2022, 3:17 PM CST (21:17 UTC)
- Expired
- Feb 17, 2022, 5:15 PM CST
- In force
- 118 min
- Issued by
- the Storm Prediction Center
- Concerning
- Heavy snow
All 37 counties
Brown County, IL, Bureau County, IL, Cass County, IL, Cook County, IL, DeKalb County, IL, DeWitt County, IL, DuPage County, IL, Ford County, IL, Fulton County, IL, Grundy County, IL, Hancock County, IL, Iroquois County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Knox County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Marshall County, IL, Mason County, IL, McDonough County, IL, McLean County, IL, Menard County, IL, Peoria County, IL, Piatt County, IL, Putnam County, IL, Schuyler County, IL, Stark County, IL, Tazewell County, IL, Warren County, IL, Will County, IL, Woodford County, IL, Lake County, IN
The radar
The Lincoln radar (KILX), 74 km from the middle of the area, began a volume at 21:16 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, 9.3 hours before the alert went out and 80 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
- 636 m above ground
- 0-6 km bulk shear
- 80 kt
- 0-1 km storm-relative helicity
- 130 m²/s²
- 0-3 km storm-relative helicity
- 241 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Feb 17, 6:00 AM CST | Mesoscale Discussion | SPC | Adams, Brown, Calhoun, Greene, Jersey, Morgan and 2 more | 6 hr |
| Feb 17, 10:17 AM CST | Mesoscale Discussion | SPC | Adams, Brown, Cass, Champaign, Christian, DeWitt and 30 more | 5 hr |
| Feb 17, 1:12 PM CST | Mesoscale Discussion | SPC | DeKalb, Elkhart, Kosciusko, LaGrange, Lake, LaPorte and 6 more | 5 hr |
Nearby
Mesoscale Discussions in Illinois, 2022Mesoscale Discussions in Indiana, 2022Every mesoscale discussion in 2022
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.