Alert archive / Wisconsin / Mesoscale Discussions in 2014
Mesoscale Discussion 1578
The Storm Prediction Center issued this mesoscale discussion at Aug 18, 2014, 9:49 PM CDT for 4 states. It was in force for 56 min.
The area
The outline as issued.
The facts
- Issued
- Aug 18, 2014, 9:49 PM CDT (02:49 UTC)
- Expired
- Aug 18, 2014, 10:45 PM CDT
- In force
- 56 min
- Issued by
- the Storm Prediction Center
All 43 counties
Allamakee County, IA, Black Hawk County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clayton County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Howard County, IA, Mitchell County, IA, Winneshiek County, IA, Jo Daviess County, IL, Stephenson County, IL, Fillmore County, MN, Houston County, MN, Winona County, MN, Adams County, WI, Columbia County, WI, Crawford County, WI, Dane County, WI, Dodge County, WI, Grant County, WI, Green County, WI, Iowa County, WI, Jackson County, WI, Jefferson County, WI, Juneau County, WI, La Crosse County, WI, Lafayette County, WI, Marquette County, WI, Monroe County, WI, Richland County, WI, Rock County, WI, Sauk County, WI, Trempealeau County, WI, Vernon County, WI, Walworth County, WI, Waukesha County, WI
The radar
The La Crosse radar (KARX), 82 km from the middle of the area, began a volume at 02:50 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
Green Bay/Straub, WI (KGRB), launched 00:00Z, 2.8 hours before the alert went out and 246 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
- 76 J/kg
- Mixed-layer CIN
- -111 J/kg
- Mixed-layer LCL
- 830 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 14 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 19, 1:03 PM CDT | Mesoscale Discussion | SPC | Champaign, Douglas, Edgar, Iroquois, Vermilion | 57 min |
| Aug 19, 2:20 PM CDT | Mesoscale Discussion | SPC | Alexander, Crawford, Edwards, Franklin, Gallatin, Hamilton and 16 more | 115 min |
| Aug 18, 7:44 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 23 more | 6 hr |
Nearby
Mesoscale Discussions in Wisconsin, 2014Mesoscale Discussions in Iowa, 2014Mesoscale Discussions in Minnesota, 2014Every mesoscale discussion in 2014
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.