Alert archive / Illinois / Mesoscale Discussions in 2005
Mesoscale Discussion 1839
The Storm Prediction Center issued this mesoscale discussion at Jul 23, 2005, 4:49 PM CDT for 12 counties in Illinois; 4 counties in Indiana; 5 counties in Wisconsin. It was in force for 86 min.
The area
The outline as issued.
The facts
- Issued
- Jul 23, 2005, 4:49 PM CDT (21:49 UTC)
- Expired
- Jul 23, 2005, 6:15 PM CDT
- In force
- 86 min
- Issued by
- the Storm Prediction Center
All 21 counties
Boone County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Grundy County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lake County, IL, McHenry County, IL, Will County, IL, Winnebago County, IL, Jasper County, IN, Lake County, IN, Newton County, IN, Porter County, IN, Kenosha County, WI, Milwaukee County, WI, Racine County, WI, Rock County, WI, Walworth County, WI
The radar
The Chicago radar (KLOT), 49 km from the middle of the area, began a volume at 21:49 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 12:00Z, 9.8 hours before the alert went out and 202 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
- 76 J/kg
- Mixed-layer CIN
- -350 J/kg
- Mixed-layer LCL
- 1286 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 190 m²/s²
- 0-3 km storm-relative helicity
- 240 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
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 |
|---|---|---|---|---|
| Jul 23, 3:10 PM CDT | Mesoscale Discussion | SPC | Boone, DeKalb, DuPage, Kane, Lake, McHenry and 3 more | 95 min |
| Jul 23, 4:25 PM CDT | Severe Thunderstorm Watch | SPC | Cook, DuPage, Grundy, Kane, Kankakee, Kendall and 3 more | 69 min |
| Jul 23, 9:47 AM CDT | Mesoscale Discussion | SPC | Adams, Buffalo, Clark, Dunn, Eau Claire, Jackson and 10 more | 88 min |
| Jul 23, 10:15 AM CDT | Severe Thunderstorm Watch | SPC | Barron, Buffalo, Chippewa, Clark, Dunn, Eau Claire and 10 more | 5 hr |
| Jul 23, 12:24 PM CDT | Mesoscale Discussion | SPC | Adams, Barron, Buffalo, Calumet, Chippewa, Clark and 21 more | 96 min |
| Jul 23, 12:50 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Calumet, Columbia, Dodge, Fond du Lac and 17 more | 3 hr |
| Jul 23, 3:10 PM CDT | Severe Thunderstorm Watch | SPC | Columbia, Dodge, Fond du Lac, Green Lake, Jefferson, Kenosha and 8 more | 2 hr |
Nearby
Mesoscale Discussions in Illinois, 2005Mesoscale Discussions in Wisconsin, 2005Mesoscale Discussions in Indiana, 2005Every mesoscale discussion in 2005
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.