Alert archive / Iowa / Mesoscale Discussions in 2016
Mesoscale Discussion 1480
The Storm Prediction Center issued this mesoscale discussion at Aug 4, 2016, 7:17 PM CDT for Carroll County, Jo Daviess County, Stephenson County, Illinois; 22 counties in Iowa; 15 counties in Wisconsin. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- Aug 4, 2016, 7:17 PM CDT (00:17 UTC)
- Expired
- Aug 4, 2016, 8:45 PM CDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
All 40 counties
Allamakee County, IA, Benton County, IA, Black Hawk County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Cedar County, IA, Chickasaw County, IA, Clayton County, IA, Clinton County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Grundy County, IA, Hardin County, IA, Jackson County, IA, Jones County, IA, Linn County, IA, Marshall County, IA, Story County, IA, Tama County, IA, Winneshiek County, IA, Carroll County, IL, Jo Daviess County, IL, Stephenson County, IL, Columbia County, WI, Crawford County, WI, Dane County, WI, Dodge County, WI, Grant County, WI, Green County, WI, Iowa County, WI, Jefferson County, WI, Lafayette County, WI, Ozaukee County, WI, Richland County, WI, Rock County, WI, Sauk County, WI, Washington County, WI, Waukesha County, WI
The radar
The Quad Cities radar (KDVN), 122 km from the middle of the area, began a volume at 00:21 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 00:00Z, 0.3 hours before the alert went out and 126 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
- 1172 J/kg
- Mixed-layer CIN
- -121 J/kg
- Mixed-layer LCL
- 1357 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 146 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 7.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 8:41 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, DeKalb, Henry, Kane and 14 more | 64 min |
| Aug 4, 8:59 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, DeKalb, Henderson, Henry, Kane and 11 more | 3 hr |
| Aug 5, 2:28 PM CDT | Mesoscale Discussion | SPC | Alexander, Gallatin, Hardin, Jackson, Johnson, Massac and 5 more | 3 hr |
Nearby
Mesoscale Discussions in Iowa, 2016Mesoscale Discussions in Wisconsin, 2016Mesoscale Discussions in Illinois, 2016Every mesoscale discussion in 2016
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.