Alert archive / Illinois / Mesoscale Discussions in 2004
Mesoscale Discussion 1832
The Storm Prediction Center issued this mesoscale discussion at Aug 2, 2004, 11:11 AM CDT for 21 counties in Illinois; 16 counties in Indiana; Berrien County, Michigan. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 2, 2004, 11:11 AM CDT (16:11 UTC)
- Expired
- Aug 2, 2004, 1:15 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 38 counties
Champaign County, IL, Coles County, IL, Cook County, IL, DeWitt County, IL, Douglas County, IL, DuPage County, IL, Edgar County, IL, Ford County, IL, Grundy County, IL, Iroquois County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lake County, IL, LaSalle County, IL, Livingston County, IL, McLean County, IL, Moultrie County, IL, Piatt County, IL, Vermilion County, IL, Will County, IL, Benton County, IN, Carroll County, IN, Fountain County, IN, Jasper County, IN, Lake County, IN, LaPorte County, IN, Montgomery County, IN, Newton County, IN, Parke County, IN, Porter County, IN, Pulaski County, IN, Starke County, IN, Tippecanoe County, IN, Vermillion County, IN, Warren County, IN, White County, IN, Berrien County, MI
The radar
The Chicago radar (KLOT), 84 km from the middle of the area, began a volume at 16:13 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, 4.2 hours before the alert went out and 225 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1859 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
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 |
|---|---|---|---|---|
| Aug 2, 12:31 PM CDT | Mesoscale Discussion | SPC | DeKalb, LaGrange, Steuben | 119 min |
| Aug 2, 11:44 AM CDT | Mesoscale Discussion | SPC | Alger, Delta, Dickinson, Iron, Luce, Mackinac and 2 more | 2 hr |
| Aug 2, 1:05 PM CDT | Severe Thunderstorm Watch | SPC | Allegan, Antrim, Barry, Bay, Benzie, Calhoun and 41 more | 5 hr |
| Aug 2, 4:32 PM CDT | Mesoscale Discussion | SPC | Alcona, Alpena, Arenac, Barry, Bay, Calhoun and 34 more | 88 min |
Nearby
Mesoscale Discussions in Illinois, 2004Mesoscale Discussions in Indiana, 2004Mesoscale Discussions in Michigan, 2004Every mesoscale discussion in 2004
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.