Alert archive / Missouri / Mesoscale Discussions in 2020
Mesoscale Discussion 1687
The Storm Prediction Center issued this mesoscale discussion at Sep 8, 2020, 3:01 PM CDT for 9 counties in Illinois; 8 counties in Kansas; 28 counties in Missouri. It was in force for 119 min.
The area
The outline as issued.
The facts
- Issued
- Sep 8, 2020, 3:01 PM CDT (20:01 UTC)
- Expired
- Sep 8, 2020, 5:00 PM CDT
- In force
- 119 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch unlikely
- Chance of a watch
- 5%
All 45 counties
Calhoun County, IL, Christian County, IL, Greene County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Montgomery County, IL, Sangamon County, IL, Shelby County, IL, Bourbon County, KS, Chautauqua County, KS, Cherokee County, KS, Crawford County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Barton County, MO, Benton County, MO, Callaway County, MO, Camden County, MO, Cedar County, MO, City of Saint Louis, MO, Cole County, MO, Dade County, MO, Dallas County, MO, Franklin County, MO, Gasconade County, MO, Hickory County, MO, Jasper County, MO, Laclede County, MO, Lincoln County, MO, Maries County, MO, Miller County, MO, Moniteau County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Polk County, MO, Pulaski County, MO, Saint Charles County, MO, Saint Louis County, MO, St. Clair County, MO, Vernon County, MO, Warren County, MO
The radar
The Springfield radar (KSGF), 112 km from the middle of the area, began a volume at 20:02 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 430 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
- 173 J/kg
- Mixed-layer CIN
- -215 J/kg
- Mixed-layer LCL
- 638 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 129 m²/s²
- 0-3 km storm-relative helicity
- 46 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 |
|---|---|---|---|---|
| Sep 7, 7:14 PM CDT | Mesoscale Discussion | SPC | Fulton, Hancock, Henderson, McDonough, Warren | 2 hr |
Nearby
Mesoscale Discussions in Missouri, 2020Mesoscale Discussions in Illinois, 2020Mesoscale Discussions in Kansas, 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.