Alert archive / Illinois / Mesoscale Discussions in 2023
Mesoscale Discussion 2049
The Storm Prediction Center issued this mesoscale discussion at Aug 25, 2023, 6:55 PM CDT for 27 counties in Illinois; Knox County, Sullivan County, Vigo County, Indiana. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 25, 2023, 6:55 PM CDT (23:55 UTC)
- Expired
- Aug 25, 2023, 9:30 PM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch possible
- Chance of a watch
- 60%
All 30 counties
Cass County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Fayette County, IL, Fulton County, IL, Jasper County, IL, Lawrence County, IL, Logan County, IL, Macon County, IL, Mason County, IL, Menard County, IL, Montgomery County, IL, Morgan County, IL, Moultrie County, IL, Piatt County, IL, Richland County, IL, Sangamon County, IL, Schuyler County, IL, Shelby County, IL, Knox County, IN, Sullivan County, IN, Vigo County, IN
The radar
The Lincoln radar (KILX), 82 km from the middle of the area, began a volume at 23:59 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, 11.9 hours before the alert went out and 79 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
- 3366 J/kg
- Mixed-layer CIN
- -113 J/kg
- Mixed-layer LCL
- 992 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 72 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 |
|---|---|---|---|---|
| Aug 25, 3:25 PM CDT | Mesoscale Discussion | SPC | Bond, Christian, Clark, Clay, Clinton, Crawford and 12 more | 2 hr |
| Aug 24, 8:33 PM CDT | Mesoscale Discussion | SPC | Steuben | 87 min |
| Aug 24, 8:48 PM CDT | Severe Thunderstorm Watch | SPC | Allen, DeKalb, LaGrange, Noble, Steuben | 5 hr |
| Aug 24, 10:42 PM CDT | Mesoscale Discussion | SPC | Adams, Allen, DeKalb, Jay, Steuben, Wells | 2 hr |
Nearby
Mesoscale Discussions in Illinois, 2023Mesoscale Discussions in Indiana, 2023Every mesoscale discussion in 2023
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.