Alert archive / Illinois / Mesoscale Discussions in 2022
Mesoscale Discussion 558
The Storm Prediction Center issued this mesoscale discussion at Apr 24, 2022, 2:58 PM CDT for 24 counties in Illinois; 4 counties in Indiana. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- Apr 24, 2022, 2:58 PM CDT (19:58 UTC)
- Expired
- Apr 24, 2022, 4:30 PM CDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 153
All 28 counties
Bond County, IL, Champaign County, IL, Christian County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Fayette County, IL, Ford County, IL, Iroquois County, IL, Macon County, IL, Madison County, IL, Marion County, IL, Montgomery County, IL, Moultrie County, IL, Piatt County, IL, Saint Clair County, IL, Shelby County, IL, Vermilion County, IL, Washington County, IL, Benton County, IN, Jasper County, IN, Newton County, IN, Warren County, IN
The radar
The Lincoln radar (KILX), 90 km from the middle of the area, began a volume at 19:58 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, 8.0 hours before the alert went out and 37 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
- 162 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 978 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 296 m²/s²
- 0-3 km storm-relative helicity
- 332 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.0
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 |
|---|---|---|---|---|
| Apr 24, 10:56 AM CDT | Mesoscale Discussion | SPC | Bond, Champaign, Christian, DeWitt, DuPage, Ford and 15 more | 2 hr |
| Apr 24, 12:46 PM CDT | Severe Thunderstorm Watch | SPC | Bond, Champaign, Christian, Clark, Clay, Clinton and 20 more | 6 hr |
| Apr 24, 1:47 PM CDT | Mesoscale Discussion | SPC | Elkhart, LaGrange, LaPorte, Marshall, Saint Joseph, Starke | 88 min |
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.