Alert archive / Illinois / Mesoscale Discussions in 2020
Mesoscale Discussion 236
The Storm Prediction Center issued this mesoscale discussion at Mar 27, 2020, 3:43 AM CDT for 16 counties in Illinois; 5 counties in Indiana; Saint Charles County, Saint Louis County, City of Saint Louis, Missouri. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- Mar 27, 2020, 3:43 AM CDT (08:43 UTC)
- Expired
- Mar 27, 2020, 5:15 AM CDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
All 24 counties
Bond County, IL, Clay County, IL, Clinton County, IL, Crawford County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Jasper County, IL, Jersey County, IL, Lawrence County, IL, Madison County, IL, Marion County, IL, Richland County, IL, Saint Clair County, IL, Wabash County, IL, Wayne County, IL, Daviess County, IN, Greene County, IN, Knox County, IN, Martin County, IN, Sullivan County, IN, City of Saint Louis, MO, Saint Charles County, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 132 km from the middle of the area, began a volume at 08:43 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, 8.7 hours before the alert went out and 165 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
- 535 m above ground
- 0-6 km bulk shear
- 92 kt
- 0-1 km storm-relative helicity
- 215 m²/s²
- 0-3 km storm-relative helicity
- 430 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 |
|---|---|---|---|---|
| Mar 26, 9:51 PM CDT | Mesoscale Discussion | SPC | Calhoun, Greene, Jersey, Macoupin, Madison, Monroe and 5 more | 84 min |
| Mar 26, 10:27 PM CDT | Severe Thunderstorm Watch | SPC | Bond, Calhoun, Clinton, Fayette, Greene, Jersey and 8 more | 7 hr |
| Mar 27, 1:20 AM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Jersey, Madison, Monroe, Saint Clair | 85 min |
| Mar 27, 5:15 PM CDT | Mesoscale Discussion | SPC | Monroe, Randolph | 90 min |
| Mar 27, 5:46 PM CDT | Severe Thunderstorm Watch | SPC | Randolph | 3 hr |
| Mar 27, 3:45 PM CDT | Mesoscale Discussion | SPC | Barry, Barton, Camden, Cedar, Christian, Dade and 24 more | 2 hr |
| Mar 27, 4:06 PM CDT | Severe Thunderstorm Watch | SPC | Barry, Camden, Christian, Dade, Dallas, Dent and 19 more | 5 hr |
Nearby
Mesoscale Discussions in Illinois, 2020Mesoscale Discussions in Indiana, 2020Mesoscale Discussions in Missouri, 2020Every mesoscale discussion in 2020
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.