Alert archive / Illinois / Mesoscale Discussions in 2003
Mesoscale Discussion 2272
The Storm Prediction Center issued this mesoscale discussion at Aug 26, 2003, 4:45 PM CDT for 20 counties in Illinois; 5 counties in Iowa; 4 counties in Missouri. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- Aug 26, 2003, 4:45 PM CDT (21:45 UTC)
- Expired
- Aug 26, 2003, 6:15 PM CDT
- In force
- 90 min
- Issued by
- the Storm Prediction Center
All 29 counties
Des Moines County, IA, Henry County, IA, Jefferson County, IA, Lee County, IA, Van Buren County, IA, Adams County, IL, Brown County, IL, Cass County, IL, DeWitt County, IL, Fulton County, IL, Hancock County, IL, Henderson County, IL, Knox County, IL, Logan County, IL, Marshall County, IL, Mason County, IL, McDonough County, IL, McLean County, IL, Menard County, IL, Peoria County, IL, Schuyler County, IL, Stark County, IL, Tazewell County, IL, Warren County, IL, Woodford County, IL, Clark County, MO, Knox County, MO, Lewis County, MO, Scotland County, MO
The radar
The Lincoln radar (KILX), 99 km from the middle of the area, began a volume at 21:46 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, 9.8 hours before the alert went out and 118 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
- 1643 J/kg
- Mixed-layer CIN
- -247 J/kg
- Mixed-layer LCL
- 1565 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 162 m²/s²
- 0-3 km storm-relative helicity
- 177 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 25, 7:03 PM CDT | Mesoscale Discussion | SPC | Mercer, Rock Island | 87 min |
| Aug 25, 8:45 PM CDT | Severe Thunderstorm Watch | SPC | Henderson, Mercer, Rock Island, Warren | 5 hr |
| Aug 26, 12:21 AM CDT | Mesoscale Discussion | SPC | Boone, Jo Daviess, Lake, McHenry, Stephenson, Winnebago | 84 min |
| Aug 26, 11:15 AM CDT | Mesoscale Discussion | SPC | Bureau, Champaign, Ford, Grundy, Henry, Iroquois and 11 more | 3 hr |
| Aug 26, 2:19 PM CDT | Mesoscale Discussion | SPC | Hancock, Henderson, McDonough | 116 min |
| Aug 25, 7:38 PM CDT | Mesoscale Discussion | SPC | Allamakee, Black Hawk, Boone, Bremer, Buchanan, Butler and 28 more | 67 min |
Nearby
Mesoscale Discussions in Illinois, 2003Mesoscale Discussions in Iowa, 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; radar from the NEXRAD Level II archive.