Alert archive / Illinois / Mesoscale Discussions in 2008
Mesoscale Discussion 1601
The Storm Prediction Center issued this mesoscale discussion at Jun 27, 2008, 8:56 PM CDT for 18 counties in Illinois; 14 counties in Wisconsin. It was in force for 94 min.
The area
The outline as issued.
The facts
- Issued
- Jun 27, 2008, 8:56 PM CDT (01:56 UTC)
- Expired
- Jun 27, 2008, 10:30 PM CDT
- In force
- 94 min
- Issued by
- the Storm Prediction Center
All 32 counties
Boone County, IL, Bureau County, IL, Carroll County, IL, DeKalb County, IL, DuPage County, IL, Henry County, IL, Jo Daviess County, IL, Kane County, IL, Kendall County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, McHenry County, IL, Ogle County, IL, Putnam County, IL, Stephenson County, IL, Whiteside County, IL, Winnebago County, IL, Columbia County, WI, Dane County, WI, Dodge County, WI, Green County, WI, Jefferson County, WI, Kenosha County, WI, Lafayette County, WI, Milwaukee County, WI, Ozaukee County, WI, Racine County, WI, Rock County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI
The radar
The Milwaukee radar (KMKX), 84 km from the middle of the area, began a volume at 01:55 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
Davenport, (KDVN), launched 00:00Z, 1.9 hours before the alert went out and 138 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
- 313 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 1000 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- -34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
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 27, 8:13 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Calhoun, Pike | 8 hr |
| Jun 27, 11:26 PM CDT | Mesoscale Discussion | SPC | Monroe | 94 min |
| Jun 27, 11:42 PM CDT | Severe Thunderstorm Watch | SPC | Calhoun, Jersey, Madison, Monroe, Randolph, Saint Clair | 9 hr |
| Jun 28, 10:44 AM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 17 more | 2 hr |
| Jun 28, 2:21 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Cook, DeKalb, DuPage, Grundy, Kane and 5 more | 7 hr |
| Jun 28, 3:23 PM CDT | Mesoscale Discussion | SPC | Cook, DuPage, Kane, Kendall, Lake, McHenry and 1 more | 2 hr |
| Jun 28, 12:48 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Calumet, Clark, Columbia, Crawford and 44 more | 5 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.