Alert archive / Illinois / Mesoscale Discussions in 2011
Mesoscale Discussion 1086
The Storm Prediction Center issued this mesoscale discussion at Jun 4, 2011, 4:47 PM CDT for 16 counties in Illinois; Des Moines County, Lee County, Van Buren County, Iowa; Clark County, Scotland County, Missouri. It was in force for 28 min.
The area
The outline as issued.
The facts
- Issued
- Jun 4, 2011, 4:47 PM CDT (21:47 UTC)
- Expired
- Jun 4, 2011, 5:15 PM CDT
- In force
- 28 min
- Issued by
- the Storm Prediction Center
All 21 counties
Des Moines County, IA, Lee County, IA, Van Buren County, IA, DeWitt County, IL, Fulton County, IL, Hancock County, IL, Henderson County, IL, Knox County, IL, Logan County, IL, Marshall County, IL, Mason County, IL, McDonough County, IL, McLean County, IL, Peoria County, IL, Schuyler County, IL, Stark County, IL, Tazewell County, IL, Warren County, IL, Woodford County, IL, Clark County, MO, Scotland County, MO
The radar
The Lincoln radar (KILX), 102 km from the middle of the area, began a volume at 21:49 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 9.8 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
- 2541 J/kg
- Mixed-layer CIN
- -116 J/kg
- Mixed-layer LCL
- 1175 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -128 m²/s²
- 0-3 km storm-relative helicity
- -36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 4, 1:27 PM CDT | Mesoscale Discussion | SPC | Bureau, Cook, DeKalb, DuPage, Grundy, Iroquois and 8 more | 63 min |
| Jun 4, 2:08 PM CDT | Severe Thunderstorm Watch | SPC | Cook, DeKalb, DuPage, Ford, Grundy, Iroquois and 6 more | 7 hr |
| Jun 4, 4:53 PM CDT | Severe Thunderstorm Watch | SPC | Cass, Champaign, Christian, Clark, Coles, Cumberland and 25 more | 6 hr |
| Jun 4, 5:42 PM CDT | Mesoscale Discussion | SPC | Andrew, Buchanan, Caldwell, Carroll, Clay, Clinton and 10 more | 63 min |
Nearby
Mesoscale Discussions in Illinois, 2011Mesoscale Discussions in Iowa, 2011Mesoscale Discussions in Missouri, 2011Every mesoscale discussion in 2011
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.