Alert archive / Iowa / Mesoscale Discussions in 2003
Mesoscale Discussion 2198
The Storm Prediction Center issued this mesoscale discussion at Aug 20, 2003, 2:15 PM CDT for 5 states. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- Aug 20, 2003, 2:15 PM CDT (19:15 UTC)
- Expired
- Aug 20, 2003, 3:45 PM CDT
- In force
- 90 min
- Issued by
- the Storm Prediction Center
All 64 counties
Allamakee County, IA, Appanoose County, IA, Benton County, IA, Black Hawk County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Cedar County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clarke County, IA, Clayton County, IA, Davis County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Grundy County, IA, Hamilton County, IA, Hardin County, IA, Henry County, IA, Howard County, IA, Iowa County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Lucas County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Mitchell County, IA, Monroe County, IA, Muscatine County, IA, Polk County, IA, Poweshiek County, IA, Story County, IA, Tama County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Winneshiek County, IA, Worth County, IA, Adams County, IL, Hancock County, IL, Henderson County, IL, Mercer County, IL, Mower County, MN, Adair County, MO, Clark County, MO, Knox County, MO, Lewis County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO, Grant County, WI
The radar
The Des Moines radar (KDMX), 122 km from the middle of the area, began a volume at 19:20 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 7.3 hours before the alert went out and 146 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
- 641 J/kg
- Mixed-layer CIN
- -231 J/kg
- Mixed-layer LCL
- 1398 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 96 m²/s²
- 0-3 km storm-relative helicity
- 102 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 20, 2:50 PM CDT | Severe Thunderstorm Watch | SPC | Carroll, Fulton, Hancock, Henderson, Henry, Jo Daviess and 8 more | 5 hr |
| Aug 20, 5:27 PM CDT | Mesoscale Discussion | SPC | Calhoun, Greene, Jersey, Monroe, Pike | 2 hr |
| Aug 20, 6:09 PM CDT | Mesoscale Discussion | SPC | Carroll, Fulton, Hancock, Henderson, Henry, Jo Daviess and 8 more | 2 hr |
| Aug 20, 2:11 PM CDT | Mesoscale Discussion | SPC | Chisago, Goodhue, Houston, Pine, Wabasha, Washington and 1 more | 2 hr |
| Aug 20, 3:45 PM CDT | Tornado Watch | SPC | Aitkin, Carlton, Chisago, Itasca, Kanabec, Lake and 2 more | 5 hr |
| Aug 20, 3:26 PM CDT | Mesoscale Discussion | SPC | Bates, Buchanan, Caldwell, Carroll, Cass, Chariton and 19 more | 94 min |
| Aug 20, 4:10 PM CDT | Severe Thunderstorm Watch | SPC | Andrew, Buchanan, Caldwell, Carroll, Cass, Chariton and 15 more | 5 hr |
Nearby
Mesoscale Discussions in Iowa, 2003Mesoscale Discussions in Missouri, 2003Mesoscale Discussions in Illinois, 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.