Alert archive / Illinois / Mesoscale Discussions in 2004
Mesoscale Discussion 2098
The Storm Prediction Center issued this mesoscale discussion at Aug 24, 2004, 1:13 PM CDT for 46 counties in Illinois; 14 counties in Indiana; 26 counties in Missouri. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 24, 2004, 1:13 PM CDT (18:13 UTC)
- Expired
- Aug 24, 2004, 3:15 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 86 counties
Bond County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Cook County, IL, Crawford County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, DuPage County, IL, Edgar County, IL, Effingham County, IL, Fayette County, IL, Ford County, IL, Franklin County, IL, Grundy County, IL, Hamilton County, IL, Iroquois County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lawrence County, IL, Livingston County, IL, Macon County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Moultrie County, IL, Perry County, IL, Piatt County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Shelby County, IL, Vermilion County, IL, Washington County, IL, Wayne County, IL, Will County, IL, Williamson County, IL, Benton County, IN, Fountain County, IN, Jasper County, IN, Lake County, IN, LaPorte County, IN, Newton County, IN, Parke County, IN, Porter County, IN, Pulaski County, IN, Tippecanoe County, IN, Vermillion County, IN, Vigo County, IN, Warren County, IN, White County, IN, Bollinger County, MO, Cape Girardeau County, MO, Carter County, MO, City of Saint Louis, MO, Crawford County, MO, Dent County, MO, Douglas County, MO, Howell County, MO, Iron County, MO, Jefferson County, MO, Laclede County, MO, Madison County, MO, Oregon County, MO, Perry County, MO, Phelps County, MO, Pulaski County, MO, Reynolds County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Shannon County, MO, Texas County, MO, Washington County, MO, Wayne County, MO, Webster County, MO, Wright County, MO
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 6.2 hours before the alert went out and 121 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
- 375 J/kg
- Mixed-layer CIN
- -68 J/kg
- Mixed-layer LCL
- 553 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 180 m²/s²
- 0-3 km storm-relative helicity
- 169 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Aug 24, 1:20 PM CDT | Severe Thunderstorm Watch | SPC | Bond, Clinton, Fayette, Franklin, Jackson, Jefferson and 9 more | 6 hr |
| Aug 23, 10:18 PM CDT | Mesoscale Discussion | SPC | Bates, Benton, Camden, Cass, Cole, Cooper and 14 more | 117 min |
| Aug 24, 3:02 AM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, Gentry, Harrison, Holt, Mercer and 2 more | 118 min |
| Aug 24, 12:08 PM CDT | Mesoscale Discussion | SPC | Barry, Barton, Benton, Camden, Cedar, Christian and 35 more | 2 hr |
| Aug 24, 5:26 PM CDT | Mesoscale Discussion | SPC | Andrew, Buchanan, Clay, Clinton, Holt, Platte | 3 hr |
Nearby
Mesoscale Discussions in Illinois, 2004Mesoscale Discussions in Missouri, 2004Mesoscale Discussions in Indiana, 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.