Alert archive / Illinois / Mesoscale Discussions in 2014
Mesoscale Discussion 1350
The Storm Prediction Center issued this mesoscale discussion at Jul 12, 2014, 9:09 PM CDT for 29 counties in Illinois; 7 counties in Iowa; 4 counties in Wisconsin. It was in force for 66 min.
The area
The outline as issued.
The facts
- Issued
- Jul 12, 2014, 9:09 PM CDT (02:09 UTC)
- Expired
- Jul 12, 2014, 10:15 PM CDT
- In force
- 66 min
- Issued by
- the Storm Prediction Center
All 40 counties
Des Moines County, IA, Henry County, IA, Jefferson County, IA, Lee County, IA, Louisa County, IA, Scott County, IA, Van Buren County, IA, Boone County, IL, Bureau County, IL, Carroll County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Grundy County, IL, Henderson County, IL, Henry County, IL, Kane County, IL, Kendall County, IL, Knox County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, Marshall County, IL, McHenry County, IL, Mercer County, IL, Ogle County, IL, Peoria County, IL, Putnam County, IL, Rock Island County, IL, Stark County, IL, Stephenson County, IL, Warren County, IL, Whiteside County, IL, Will County, IL, Winnebago County, IL, Woodford County, IL, Kenosha County, WI, Racine County, WI, Rock County, WI, Walworth County, WI
The radar
The Quad Cities radar (KDVN), 58 km from the middle of the area, began a volume at 02:12 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, 2.2 hours before the alert went out and 52 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
- 2609 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 916 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 129 m²/s²
- 0-3 km storm-relative helicity
- 199 m²/s²
- Significant tornado parameter
- 2.0
- Supercell composite
- 13.9
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 |
|---|---|---|---|---|
| Jul 12, 7:09 PM CDT | Mesoscale Discussion | SPC | Bureau, Fulton, Hancock, Henderson, Henry, Knox and 13 more | 96 min |
| Jul 12, 9:51 PM CDT | Tornado Watch | SPC | Boone, Cook, DeKalb, DuPage, Ford, Fulton and 21 more | 3 hr |
| Jul 12, 11:44 PM CDT | Mesoscale Discussion | SPC | Grundy, Kendall, LaSalle, Will | 31 min |
| Jul 13, 12:41 PM CDT | Mesoscale Discussion | SPC | Clay, Clinton, Crawford, Edwards, Franklin, Gallatin and 23 more | 94 min |
Nearby
Mesoscale Discussions in Illinois, 2014Mesoscale Discussions in Iowa, 2014Mesoscale Discussions in Wisconsin, 2014Every mesoscale discussion in 2014
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.