Alert archive / Wisconsin / Mesoscale Discussions in 2015
Mesoscale Discussion 1764
The Storm Prediction Center issued this mesoscale discussion at Sep 6, 2015, 5:12 PM CDT for 4 counties in Iowa; Fillmore County, Houston County, Winona County, Minnesota; 27 counties in Wisconsin. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 6, 2015, 5:12 PM CDT (22:12 UTC)
- Expired
- Sep 6, 2015, 7:15 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 34 counties
Allamakee County, IA, Chickasaw County, IA, Howard County, IA, Winneshiek County, IA, Fillmore County, MN, Houston County, MN, Winona County, MN, Adams County, WI, Calumet County, WI, Clark County, WI, Columbia County, WI, Crawford County, WI, Fond du Lac County, WI, Green Lake County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Langlade County, WI, Marathon County, WI, Marquette County, WI, Menominee County, WI, Monroe County, WI, Oconto County, WI, Outagamie County, WI, Portage County, WI, Richland County, WI, Sauk County, WI, Shawano County, WI, Trempealeau County, WI, Vernon County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI
The radar
The La Crosse radar (KARX), 82 km from the middle of the area, began a volume at 22:11 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
Green Bay/Straub, WI (KGRB), launched 12:00Z, 10.2 hours before the alert went out and 175 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
- 236 J/kg
- Mixed-layer CIN
- -135 J/kg
- Mixed-layer LCL
- 1182 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 88 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 |
|---|---|---|---|---|
| Sep 6, 2:31 PM CDT | Mesoscale Discussion | SPC | Dickinson, Lyon, O'Brien, Osceola, Sioux | 119 min |
| Sep 6, 5:26 PM CDT | Mesoscale Discussion | SPC | Audubon, Buena Vista, Calhoun, Carroll, Cass, Cherokee and 28 more | 94 min |
| Sep 6, 6:02 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Allamakee, Audubon, Black Hawk, Boone and 47 more | 7 hr |
| Sep 5, 7:34 PM CDT | Mesoscale Discussion | SPC | Aitkin, Cass, Crow Wing, Douglas, Hubbard, Itasca and 6 more | 86 min |
| Sep 6, 3:42 PM CDT | Severe Thunderstorm Watch | SPC | Aitkin, Anoka, Benton, Carlton, Carver, Cass and 33 more | 6 hr |
| Sep 6, 6:29 PM CDT | Mesoscale Discussion | SPC | Aitkin, Anoka, Benton, Carlton, Carver, Chippewa and 24 more | 2 hr |
Nearby
Mesoscale Discussions in Wisconsin, 2015Mesoscale Discussions in Iowa, 2015Mesoscale Discussions in Minnesota, 2015Every mesoscale discussion in 2015
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.