Alert archive / Iowa / Mesoscale Discussions in 2003
Mesoscale Discussion 2033
The Storm Prediction Center issued this mesoscale discussion at Jul 31, 2003, 2:38 PM CDT for Jo Daviess County, Illinois; 15 counties in Iowa; 13 counties in Wisconsin. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 31, 2003, 2:38 PM CDT (19:38 UTC)
- Expired
- Jul 31, 2003, 4:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 29 counties
Benton County, IA, Black Hawk County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Chickasaw County, IA, Clayton County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Grundy County, IA, Jackson County, IA, Jones County, IA, Linn County, IA, Tama County, IA, Jo Daviess County, IL, Columbia County, WI, Crawford County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Grant County, WI, Green County, WI, Green Lake County, WI, Iowa County, WI, Jefferson County, WI, Lafayette County, WI, Richland County, WI, Sauk County, WI
The radar
The La Crosse radar (KARX), 111 km from the middle of the area, began a volume at 19:38 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, 7.6 hours before the alert went out and 143 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
- 51 J/kg
- Mixed-layer CIN
- -90 J/kg
- Mixed-layer LCL
- 1404 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 61 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 |
|---|---|---|---|---|
| Jul 31, 12:00 PM CDT | Severe Thunderstorm Watch | SPC | Jo Daviess | 6 hr |
| Jul 31, 5:07 PM CDT | Mesoscale Discussion | SPC | Boone, Carroll, DeKalb, DuPage, Jo Daviess, Kane and 5 more | 53 min |
| Jul 31, 5:40 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Carroll, Jo Daviess, McHenry, Ogle, Stephenson and 1 more | 5 hr |
| Jul 31, 10:28 AM CDT | Mesoscale Discussion | SPC | Allamakee, Black Hawk, Boone, Bremer, Butler, Cerro Gordo and 15 more | 2 hr |
Nearby
Mesoscale Discussions in Iowa, 2003Mesoscale Discussions in Wisconsin, 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.