Alert archive / Illinois / Mesoscale Discussions in 2014
Mesoscale Discussion 809
The Storm Prediction Center issued this mesoscale discussion at Jun 4, 2014, 1:29 AM CDT for 29 counties in Illinois; 26 counties in Missouri. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- Jun 4, 2014, 1:29 AM CDT (06:29 UTC)
- Expired
- Jun 4, 2014, 3:00 AM CDT
- In force
- 91 min
- Issued by
- the Storm Prediction Center
All 55 counties
Adams County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Champaign County, IL, Christian County, IL, Coles County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Greene County, IL, Jersey County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Mason County, IL, McLean County, IL, Menard County, IL, Montgomery County, IL, Morgan County, IL, Moultrie County, IL, Piatt County, IL, Pike County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Shelby County, IL, Tazewell County, IL, Vermilion County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, Chariton County, MO, Cole County, MO, Cooper County, MO, Gasconade County, MO, Henry County, MO, Howard County, MO, Johnson County, MO, Lewis County, MO, Lincoln County, MO, Macon County, MO, Marion County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Pettis County, MO, Pike County, MO, Ralls County, MO, Randolph County, MO, Saline County, MO, Shelby County, MO, Warren County, MO
The radar
The St Louis radar (KLSX), 87 km from the middle of the area, began a volume at 06:32 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, 6.5 hours before the alert went out and 245 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
- 2429 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 147 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 3, 8:05 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Calhoun, Greene, Jersey, Morgan and 2 more | 85 min |
| Jun 3, 9:25 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Pike | 5 hr |
| Jun 3, 11:04 PM CDT | Severe Thunderstorm Watch | SPC | Cass, Fulton, Logan, Mason, Menard, Morgan and 4 more | 4 hr |
| Jun 4, 1:52 AM CDT | Severe Thunderstorm Watch | SPC | Champaign, Christian, Coles, DeWitt, Douglas, Edgar and 6 more | 3 hr |
| Jun 4, 3:46 AM CDT | Mesoscale Discussion | SPC | Champaign, Coles, Douglas, Edgar, Moultrie, Piatt and 2 more | 59 min |
| Jun 4, 5:00 AM CDT | Severe Thunderstorm Watch | SPC | Bond, Calhoun, Clinton, Fayette, Greene, Jersey and 8 more | 4 hr |
| Jun 4, 7:01 AM CDT | Mesoscale Discussion | SPC | Bond, Clinton, Fayette, Madison, Monroe, Saint Clair | 89 min |
| Jun 4, 12:20 PM CDT | Mesoscale Discussion | SPC | Alexander, Clay, Clinton, Edwards, Franklin, Gallatin and 22 more | 115 min |
| Jun 4, 2:21 PM CDT | Tornado Watch | SPC | Alexander, Clay, Clinton, Edwards, Franklin, Gallatin and 22 more | 6 hr |
| Jun 4, 6:57 PM CDT | Mesoscale Discussion | SPC | Alexander, Massac, Pope, Pulaski | 2 hr |
| Jun 3, 7:04 PM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, DeKalb, Gentry, Harrison, Holt and 2 more | 56 min |
| Jun 3, 9:41 PM CDT | Mesoscale Discussion | SPC | Adair, Andrew, Atchison, Buchanan, Caldwell, Chariton and 16 more | 64 min |
| Jun 3, 11:30 PM CDT | Mesoscale Discussion | SPC | Audrain, Boone, Caldwell, Callaway, Carroll, Cass and 23 more | 60 min |
| Jun 3, 11:45 PM CDT | Severe Thunderstorm Watch | SPC | Audrain, Benton, Boone, Callaway, Carroll, Cass and 25 more | 5 hr |
| Jun 4, 12:28 AM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, Buchanan, Holt, Nodaway, Platte | 62 min |
| Jun 4, 12:50 AM CDT | Severe Thunderstorm Watch | SPC | Andrew, Atchison, Buchanan, Caldwell, Clay, Clinton and 11 more | 3 hr |
| Jun 4, 3:32 AM CDT | Mesoscale Discussion | SPC | Benton, Camden, Cole, Cooper, Henry, Johnson and 5 more | 88 min |
| Jun 4, 12:54 PM CDT | Mesoscale Discussion | SPC | Bollinger, Butler, Carter, Dent, Dunklin, Howell and 10 more | 2 hr |
| Jun 4, 3:47 PM CDT | Mesoscale Discussion | SPC | Barry, Camden, Cedar, Christian, Dade, Dallas and 14 more | 118 min |
Nearby
Mesoscale Discussions in Illinois, 2014Mesoscale Discussions in Missouri, 2014Every mesoscale discussion in 2014
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.