Alert archive / Illinois / Mesoscale Discussions in 2018
Mesoscale Discussion 1093
The Storm Prediction Center issued this mesoscale discussion at Jul 19, 2018, 9:36 PM CDT for 29 counties in Illinois; Lee County, Iowa; 9 counties in Missouri. It was in force for 54 min.
The area
The outline as issued.
The facts
- Issued
- Jul 19, 2018, 9:36 PM CDT (02:36 UTC)
- Expired
- Jul 19, 2018, 10:30 PM CDT
- In force
- 54 min
- Issued by
- the Storm Prediction Center
All 39 counties
Lee County, IA, Adams County, IL, Bond County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Christian County, IL, Clinton County, IL, Effingham County, IL, Fayette County, IL, Fulton County, IL, Greene County, IL, Hancock County, IL, Jersey County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Mason County, IL, McDonough County, IL, Menard County, IL, Montgomery County, IL, Morgan County, IL, Moultrie County, IL, Pike County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Shelby County, IL, Clark County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Marion County, MO, Pike County, MO, Ralls County, MO, Scotland County, MO, Shelby County, MO
The radar
The Lincoln radar (KILX), 107 km from the middle of the area, began a volume at 02:37 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, 2.6 hours before the alert went out and 164 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
- 939 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 1091 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 107 m²/s²
- 0-3 km storm-relative helicity
- 203 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.9
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 |
|---|---|---|---|---|
| Jul 19, 11:43 PM CDT | Mesoscale Discussion | SPC | Bond, Clay, Clinton, Cumberland, Edwards, Effingham and 13 more | 92 min |
| Jul 20, 12:58 PM CDT | Mesoscale Discussion | SPC | Alexander, Gallatin, Hardin, Johnson, Massac, Pope and 4 more | 62 min |
| Jul 20, 6:22 PM CDT | Tornado Watch | SPC | Alexander, Gallatin, Hardin, Johnson, Massac, Pope and 5 more | 8 hr |
| Jul 19, 8:54 PM CDT | Severe Thunderstorm Watch | SPC | Dunklin, Pemiscot | 114 min |
| Jul 20, 3:46 PM CDT | Mesoscale Discussion | SPC | Carter, Christian, Douglas, Howell, Oregon, Ozark and 5 more | 59 min |
| Jul 20, 3:58 PM CDT | Severe Thunderstorm Watch | SPC | Butler, Carter, Douglas, Howell, Oregon, Ozark and 4 more | 6 hr |
Nearby
Mesoscale Discussions in Illinois, 2018Mesoscale Discussions in Missouri, 2018Mesoscale Discussions in Iowa, 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.