Alert archive / Illinois / Mesoscale Discussions in 2008
Mesoscale Discussion 1289
The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2008, 7:52 PM CDT for 26 counties in Illinois; Walworth County, Wisconsin. It was in force for 53 min.
The area
The outline as issued.
The facts
- Issued
- Jun 8, 2008, 7:52 PM CDT (00:52 UTC)
- Expired
- Jun 8, 2008, 8:45 PM CDT
- In force
- 53 min
- Issued by
- the Storm Prediction Center
All 27 counties
Boone County, IL, Bureau County, IL, Cass County, IL, DeKalb County, IL, DeWitt County, IL, DuPage County, IL, Fulton County, IL, Grundy County, IL, Kane County, IL, Kendall County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Logan County, IL, Marshall County, IL, Mason County, IL, McHenry County, IL, McLean County, IL, Menard County, IL, Peoria County, IL, Putnam County, IL, Stark County, IL, Tazewell County, IL, Will County, IL, Woodford County, IL, Walworth County, WI
The radar
The Lincoln radar (KILX), 84 km from the middle of the area, began a volume at 00:51 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 00:00Z, 0.9 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
- 2433 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 1200 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 157 m²/s²
- 0-3 km storm-relative helicity
- 166 m²/s²
- Significant tornado parameter
- 1.4
- Supercell composite
- 10.9
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 8, 8:03 PM CDT | Tornado Watch | SPC | Boone, Bureau, Cass, Cook, DeKalb, DeWitt and 28 more | 5 hr |
| Jun 8, 10:01 PM CDT | Mesoscale Discussion | SPC | Adams, Boone, Brown, Bureau, Carroll, Cass and 40 more | 59 min |
| Jun 9, 12:18 PM CDT | Mesoscale Discussion | SPC | Clark, Clay, Crawford, Cumberland, Edgar, Edwards and 14 more | 87 min |
| Jun 9, 12:38 PM CDT | Severe Thunderstorm Watch | SPC | Clark, Clay, Crawford, Cumberland, Edgar, Effingham and 3 more | 8 hr |
| Jun 9, 3:02 PM CDT | Mesoscale Discussion | SPC | Clark, Clay, Crawford, Cumberland, Edgar, Effingham and 4 more | 118 min |
| Jun 9, 4:49 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 12 more | 6 hr |
Nearby
Mesoscale Discussions in Illinois, 2008Mesoscale Discussions in Wisconsin, 2008Every mesoscale discussion in 2008
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.