Alert archive / Illinois / Mesoscale Discussions in 2007
Mesoscale Discussion 1768
The Storm Prediction Center issued this mesoscale discussion at Aug 16, 2007, 7:36 AM CDT for 17 counties in Illinois; Lee County, Iowa; 9 counties in Missouri. It was in force for 54 min.
The area
The outline as issued.
The facts
- Issued
- Aug 16, 2007, 7:36 AM CDT (12:36 UTC)
- Expired
- Aug 16, 2007, 8:30 AM CDT
- In force
- 54 min
- Issued by
- the Storm Prediction Center
All 27 counties
Lee County, IA, Adams County, IL, Brown County, IL, Cass County, IL, Christian County, IL, Fulton County, IL, Hancock County, IL, Logan County, IL, Macon County, IL, Mason County, IL, McDonough County, IL, Menard County, IL, Morgan County, IL, Pike County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Tazewell County, IL, Adair County, MO, Clark County, MO, Knox County, MO, Lewis County, MO, Macon County, MO, Marion County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO
The radar
The Lincoln radar (KILX), 143 km from the middle of the area, began a volume at 12:40 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, 0.6 hours before the alert went out and 184 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
- 329 J/kg
- Mixed-layer CIN
- -338 J/kg
- Mixed-layer LCL
- 1088 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- -19 m²/s²
- 0-3 km storm-relative helicity
- 76 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 |
|---|---|---|---|---|
| Aug 15, 9:11 PM CDT | Mesoscale Discussion | SPC | Kendall, Will | 64 min |
| Aug 16, 9:58 AM CDT | Severe Thunderstorm Watch | SPC | Bond, Christian, Clark, Clay, Crawford, Cumberland and 13 more | 5 hr |
| Aug 16, 12:49 PM CDT | Mesoscale Discussion | SPC | Crawford, Edwards, Lawrence, Richland, Wabash | 56 min |
| Aug 16, 2:00 PM CDT | Severe Thunderstorm Watch | SPC | Edwards, Hamilton, Wabash, Wayne, White | 4 hr |
| Aug 16, 5:43 AM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Cass, Fremont, Harrison and 10 more | 62 min |
| Aug 16, 3:01 PM CDT | Mesoscale Discussion | SPC | Audrain, Boone, Buchanan, Caldwell, Callaway, Carroll and 27 more | 119 min |
| Aug 16, 3:22 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Callaway, Carroll, Chariton, Cole, Cooper and 12 more | 5 hr |
Nearby
Mesoscale Discussions in Illinois, 2007Mesoscale Discussions in Missouri, 2007Mesoscale Discussions in Iowa, 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.