Alert archive / Illinois / Mesoscale Discussions in 2005
Mesoscale Discussion 74
The Storm Prediction Center issued this mesoscale discussion at Jan 12, 2005, 7:34 PM CST for 30 counties in Illinois. It was in force for 86 min.
The area
The outline as issued.
The facts
- Issued
- Jan 12, 2005, 7:34 PM CST (01:34 UTC)
- Expired
- Jan 12, 2005, 9:00 PM CST
- In force
- 86 min
- Issued by
- the Storm Prediction Center
All 30 counties
Brown County, IL, Bureau County, IL, Cass County, IL, Cook County, IL, DeKalb County, IL, DeWitt County, IL, DuPage County, IL, Fulton County, IL, Grundy County, IL, Kane County, IL, Kendall County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Logan County, IL, Marshall County, IL, Mason County, IL, McLean County, IL, Menard County, IL, Morgan County, IL, Peoria County, IL, Pike County, IL, Putnam County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Stark County, IL, Tazewell County, IL, Will County, IL, Woodford County, IL
The radar
The Lincoln radar (KILX), 75 km from the middle of the area, began a volume at 01:33 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
Lincoln, IL (KILX), launched 00:00Z, 1.6 hours before the alert went out and 100 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
- 170 J/kg
- Mixed-layer CIN
- -123 J/kg
- Mixed-layer LCL
- 924 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 217 m²/s²
- 0-3 km storm-relative helicity
- 221 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.3
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 |
|---|---|---|---|---|
| Jan 12, 6:02 PM CST | Mesoscale Discussion | SPC | Calhoun | 88 min |
| Jan 12, 9:28 PM CST | Mesoscale Discussion | SPC | Alexander, Bond, Clinton, Fayette, Jackson, Jersey and 9 more | 32 min |
| Jan 12, 9:45 PM CST | Severe Thunderstorm Watch | SPC | Alexander, Bond, Clinton, Effingham, Fayette, Greene and 14 more | 5 hr |
| Jan 13, 1:02 AM CST | Mesoscale Discussion | SPC | Alexander, Bond, Clay, Clinton, Coles, Cumberland and 13 more | 88 min |
| Jan 13, 6:51 AM CST | Mesoscale Discussion | SPC | Adams, Brown, Calhoun, Cass, Fulton, Greene and 15 more | 4 hr |
| Jan 13, 11:58 AM CST | Mesoscale Discussion | SPC | Bond, Calhoun, Cass, Champaign, Christian, Clark and 45 more | 5 hr |
Nearby
Mesoscale Discussions in Illinois, 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.