Alert archive / Illinois / Mesoscale Discussions in 2003
Mesoscale Discussion 2403
The Storm Prediction Center issued this mesoscale discussion at Sep 24, 2003, 3:26 PM CDT for 39 counties in Illinois; 34 counties in Indiana; 6 counties in Missouri. It was in force for 94 min.
The area
The outline as issued.
The facts
- Issued
- Sep 24, 2003, 3:26 PM CDT (20:26 UTC)
- Expired
- Sep 24, 2003, 5:00 PM CDT
- In force
- 94 min
- Issued by
- the Storm Prediction Center
All 79 counties
Bond County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Douglas County, IL, Edgar County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Franklin County, IL, Hamilton County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Jersey County, IL, Lawrence County, IL, Macon County, IL, Macoupin 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, Wabash County, IL, Washington County, IL, Wayne County, IL, White County, IL, Boone County, IN, Brown County, IN, Clay County, IN, Clinton County, IN, Daviess County, IN, Delaware County, IN, Fountain County, IN, Gibson County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Johnson County, IN, Knox County, IN, Lawrence County, IN, Madison County, IN, Marion County, IN, Martin County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Owen County, IN, Parke County, IN, Pike County, IN, Putnam County, IN, Shelby County, IN, Sullivan County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Vigo County, IN, Warren County, IN, City of Saint Louis, MO, Jefferson County, MO, Perry County, MO, Saint Charles County, MO, Saint Louis County, MO, Sainte Genevieve County, MO
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 8.4 hours before the alert went out and 127 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
- 1065 J/kg
- Mixed-layer CIN
- -154 J/kg
- Mixed-layer LCL
- 631 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 288 m²/s²
- 0-3 km storm-relative helicity
- 327 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 9.8
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 |
|---|---|---|---|---|
| Sep 23, 11:41 PM CDT | Mesoscale Discussion | SPC | Bureau, DeKalb, DuPage, Ford, Grundy, Iroquois and 11 more | 2 hr |
| Sep 24, 12:41 PM CDT | Mesoscale Discussion | SPC | Bond, Cass, Champaign, Christian, Clinton, Coles and 40 more | 2 hr |
| Sep 24, 1:20 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Allen, Cass, DeKalb, Elkhart, Fulton and 17 more | 7 hr |
| Sep 24, 2:58 PM CDT | Mesoscale Discussion | SPC | Elkhart, LaGrange, LaPorte, Saint Joseph, Steuben | 62 min |
| Sep 24, 5:37 PM CDT | Mesoscale Discussion | SPC | Allen, Cass, DeKalb, Elkhart, Fulton, Huntington and 16 more | 83 min |
Nearby
Mesoscale Discussions in Illinois, 2003Mesoscale Discussions in Indiana, 2003Mesoscale Discussions in Missouri, 2003Every mesoscale discussion in 2003
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.