Alert archive / Illinois / Mesoscale Discussions in 2011
Mesoscale Discussion 382
The Storm Prediction Center issued this mesoscale discussion at Apr 9, 2011, 4:12 AM CDT for 37 counties in Illinois; 8 counties in Indiana; 4 counties in Missouri. It was in force for 93 min.
The area
The outline as issued.
The facts
- Issued
- Apr 9, 2011, 4:12 AM CDT (09:12 UTC)
- Expired
- Apr 9, 2011, 5:45 AM CDT
- In force
- 93 min
- Issued by
- the Storm Prediction Center
All 49 counties
Bond County, IL, Calhoun County, IL, Cass 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, Edwards County, IL, Effingham County, IL, Fayette County, IL, Greene County, IL, Jasper County, IL, Jefferson County, IL, Jersey County, IL, Lawrence County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Menard County, IL, Montgomery County, IL, Morgan County, IL, Moultrie County, IL, Pike County, IL, Richland County, IL, Saint Clair County, IL, Sangamon County, IL, Scott County, IL, Shelby County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, Clay County, IN, Daviess County, IN, Gibson County, IN, Greene County, IN, Knox County, IN, Pike County, IN, Sullivan County, IN, Vigo County, IN, City of Saint Louis, MO, Lincoln County, MO, Saint Charles County, MO, Saint Louis County, MO
The radar
The Lincoln radar (KILX), 122 km from the middle of the area, began a volume at 09:13 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
Lincoln, IL (KILX), launched 00:00Z, 9.2 hours before the alert went out and 114 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 637 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 158 m²/s²
- 0-3 km storm-relative helicity
- 242 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 |
|---|---|---|---|---|
| Apr 9, 6:41 AM CDT | Mesoscale Discussion | SPC | Edwards, Gallatin, Hamilton, Hardin, Johnson, Lawrence and 10 more | 2 hr |
| Apr 9, 7:25 AM CDT | Severe Thunderstorm Watch | SPC | Edwards, Gallatin, Hamilton, Hardin, Johnson, Massac and 6 more | 6 hr |
| Apr 8, 8:32 PM CDT | Mesoscale Discussion | SPC | Barton, Bates, Benton, Camden, Cass, Cedar and 22 more | 88 min |
| Apr 8, 9:01 PM CDT | Severe Thunderstorm Watch | SPC | Audrain, Barton, Bates, Benton, Boone, Buchanan and 42 more | 7 hr |
| Apr 8, 11:26 PM CDT | Mesoscale Discussion | SPC | Audrain, Barton, Bates, Benton, Boone, Buchanan and 44 more | 94 min |
| Apr 9, 1:52 AM CDT | Mesoscale Discussion | SPC | Barry, Barton, Boone, Camden, Cedar, Christian and 25 more | 53 min |
Nearby
Mesoscale Discussions in Illinois, 2011Mesoscale Discussions in Indiana, 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.