Alert archive / Illinois / Mesoscale Discussions in 2007
Mesoscale Discussion 315
The Storm Prediction Center issued this mesoscale discussion at Mar 22, 2007, 6:13 AM CDT for 26 counties in Illinois; 26 counties in Missouri. It was in force for 62 min.
The area
The outline as issued.
The facts
- Issued
- Mar 22, 2007, 6:13 AM CDT (11:13 UTC)
- Expired
- Mar 22, 2007, 7:15 AM CDT
- In force
- 62 min
- Issued by
- the Storm Prediction Center
All 52 counties
Adams County, IL, Bond County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Christian County, IL, DeWitt County, IL, Fulton County, IL, Greene County, IL, Jersey County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Mason County, IL, McLean County, IL, Menard County, IL, Montgomery County, IL, Morgan County, IL, Piatt County, IL, Pike County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Shelby County, IL, Tazewell County, IL, Audrain County, MO, Benton County, MO, Boone County, MO, Callaway County, MO, Camden County, MO, City of Saint Louis, MO, Cole County, MO, Franklin County, MO, Gasconade County, MO, Lewis County, MO, Lincoln County, MO, Maries County, MO, Marion County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Pike County, MO, Ralls County, MO, Saint Charles County, MO, Saint Louis County, MO, Shelby County, MO, St. Clair County, MO, Warren County, MO
The radar
The St Louis radar (KLSX), 56 km from the middle of the area, began a volume at 11:16 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 00:00Z, 11.2 hours before the alert went out and 248 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
- 457 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 1633 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 251 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.8
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 |
|---|---|---|---|---|
| Mar 22, 2:02 AM CDT | Mesoscale Discussion | SPC | Adams, Brown, Cass, Fulton, Greene, Hancock and 16 more | 118 min |
| Mar 22, 2:49 AM CDT | Mesoscale Discussion | SPC | Adams, Bond, Brown, Calhoun, Cass, Christian and 14 more | 26 min |
| Mar 22, 2:59 AM CDT | Tornado Watch | SPC | Adams, Brown, Calhoun, Cass, Christian, DeWitt and 19 more | 7 hr |
| Mar 22, 4:43 AM CDT | Mesoscale Discussion | SPC | Champaign, Clark, Coles, Cumberland, Douglas, Edgar and 4 more | 62 min |
| Mar 22, 5:03 AM CDT | Severe Thunderstorm Watch | SPC | Champaign, Coles, Douglas, Edgar, Ford, Iroquois and 1 more | 4 hr |
| Mar 22, 7:08 AM CDT | Mesoscale Discussion | SPC | Clark | 67 min |
| Mar 21, 9:31 PM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, DeKalb, Gentry, Harrison, Holt and 2 more | 59 min |
| Mar 22, 12:52 AM CDT | Mesoscale Discussion | SPC | Adair, Buchanan, Caldwell, Carroll, Chariton, Clay and 22 more | 53 min |
Nearby
Mesoscale Discussions in Illinois, 2007Mesoscale Discussions in Missouri, 2007Every mesoscale discussion in 2007
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.