Alert archive / Illinois / Mesoscale Discussions in 2020
Mesoscale Discussion 793
The Storm Prediction Center issued this mesoscale discussion at Jun 3, 2020, 9:52 AM CDT for 17 counties in Illinois; 4 counties in Iowa; 4 counties in Missouri. It was in force for 113 min.
The area
The outline as issued.
The facts
- Issued
- Jun 3, 2020, 9:52 AM CDT (14:52 UTC)
- Expired
- Jun 3, 2020, 11:45 AM CDT
- In force
- 113 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch unlikely
- Chance of a watch
- 20%
All 25 counties
Des Moines County, IA, Henry County, IA, Lee County, IA, Van Buren County, IA, Adams County, IL, Brown County, IL, Cass County, IL, Fulton County, IL, Hancock County, IL, Henderson County, IL, Knox County, IL, Marshall County, IL, Mason County, IL, McDonough County, IL, Menard County, IL, Peoria County, IL, Schuyler County, IL, Stark County, IL, Tazewell County, IL, Warren County, IL, Woodford County, IL, Clark County, MO, Knox County, MO, Lewis County, MO, Scotland County, MO
The radar
The Quad Cities radar (KDVN), 112 km from the middle of the area, began a volume at 14:52 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
Davenport, (KDVN), launched 12:00Z, 2.9 hours before the alert went out and 115 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
- 529 J/kg
- Mixed-layer CIN
- -163 J/kg
- Mixed-layer LCL
- 1033 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- 140 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
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 3, 1:45 PM CDT | Mesoscale Discussion | SPC | Adams, Bond, Brown, Calhoun, Cass, Christian and 33 more | 2 hr |
| Jun 3, 3:52 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Bond, Brown, Calhoun, Clinton, Fayette and 12 more | 6 hr |
| Jun 3, 6:37 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Cass, Fulton, Hancock, Henderson and 15 more | 113 min |
| Jun 3, 4:56 AM CDT | Mesoscale Discussion | SPC | Adair, Adams, Benton, Cedar, Clarke, Clinton and 22 more | 3 hr |
Nearby
Mesoscale Discussions in Illinois, 2020Mesoscale Discussions in Iowa, 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.