Alert archive / Iowa / Mesoscale Discussions in 2004
Mesoscale Discussion 1734
The Storm Prediction Center issued this mesoscale discussion at Jul 19, 2004, 3:26 PM CDT for 11 counties in Illinois; 28 counties in Iowa; 5 counties in Wisconsin. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 19, 2004, 3:26 PM CDT (20:26 UTC)
- Expired
- Jul 19, 2004, 5:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 44 counties
Allamakee County, IA, Benton County, IA, Black Hawk County, IA, Bremer County, IA, Buchanan County, IA, Cedar County, IA, Chickasaw County, IA, Clayton County, IA, Clinton County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Fayette County, IA, Henry County, IA, Howard County, IA, Iowa County, IA, Jackson County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Linn County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Van Buren County, IA, Washington County, IA, Winneshiek County, IA, Carroll County, IL, Henderson County, IL, Henry County, IL, Jo Daviess County, IL, Knox County, IL, Mercer County, IL, Peoria County, IL, Rock Island County, IL, Stark County, IL, Warren County, IL, Whiteside County, IL, Crawford County, WI, Grant County, WI, Iowa County, WI, Lafayette County, WI, Richland County, WI
The radar
The Quad Cities radar (KDVN), 68 km from the middle of the area, began a volume at 20:30 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, 8.4 hours before the alert went out and 75 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1160 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 129 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 19, 1:40 PM CDT | Tornado Watch | SPC | Carroll, Henderson, Henry, Jo Daviess, Knox, Mercer and 5 more | 5 hr |
| Jul 19, 12:26 PM CDT | Mesoscale Discussion | SPC | Allamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 36 more | 3 hr |
| Jul 19, 6:31 PM CDT | Mesoscale Discussion | SPC | Forest, Langlade, Lincoln, Oneida, Price, Sawyer and 1 more | 89 min |
Nearby
Mesoscale Discussions in Iowa, 2004Mesoscale Discussions in Illinois, 2004Mesoscale Discussions in Wisconsin, 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; radar from the NEXRAD Level II archive.