Alert archive / Illinois / Mesoscale Discussions in 2018
Mesoscale Discussion 680
The Storm Prediction Center issued this mesoscale discussion at Jun 9, 2018, 11:09 AM CDT for 25 counties in Illinois; 9 counties in Indiana; 5 counties in Missouri. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 9, 2018, 11:09 AM CDT (16:09 UTC)
- Expired
- Jun 9, 2018, 1:15 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 5%
All 39 counties
Bond County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Fayette County, IL, Jasper County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Moultrie County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Shelby County, IL, Washington County, IL, Boone County, IN, Clay County, IN, Hendricks County, IN, Montgomery County, IN, Parke County, IN, Putnam County, IN, Sullivan County, IN, Vermillion County, IN, Vigo County, IN, City of Saint Louis, MO, Jefferson County, MO, Saint Charles County, MO, Saint Louis County, MO, Sainte Genevieve County, MO
The radar
The Evansville,IN radar (KVWX), 128 km from the middle of the area, began a volume at 16:11 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, 4.2 hours before the alert went out and 123 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
- 1519 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 1159 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 82 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 |
|---|---|---|---|---|
| Jun 9, 6:30 PM CDT | Mesoscale Discussion | SPC | Bureau, Carroll, DeKalb, Henry, Jo Daviess, Knox and 12 more | 2 hr |
| Jun 8, 9:35 PM CDT | Mesoscale Discussion | SPC | Adair, Chariton, Knox, Linn, Livingston, Macon and 2 more | 115 min |
Nearby
Mesoscale Discussions in Illinois, 2018Mesoscale Discussions in Indiana, 2018Mesoscale Discussions in Missouri, 2018Every mesoscale discussion in 2018
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.