Alert archive / Wisconsin / Mesoscale Discussions in 2018
Mesoscale Discussion 1372
The Storm Prediction Center issued this mesoscale discussion at Aug 27, 2018, 6:27 PM EDT for 14 counties in Michigan; 23 counties in Wisconsin. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 27, 2018, 6:27 PM EDT (22:27 UTC)
- Expired
- Aug 27, 2018, 8:30 PM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 37 counties
Alger County, MI, Baraga County, MI, Delta County, MI, Dickinson County, MI, Gogebic County, MI, Houghton County, MI, Iron County, MI, Keweenaw County, MI, Luce County, MI, Mackinac County, MI, Marquette County, MI, Menominee County, MI, Ontonagon County, MI, Schoolcraft County, MI, Adams County, WI, Brown County, WI, Door County, WI, Florence County, WI, Forest County, WI, Juneau County, WI, Kewaunee County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Marinette County, WI, Menominee County, WI, Monroe County, WI, Oconto County, WI, Oneida County, WI, Outagamie County, WI, Portage County, WI, Shawano County, WI, Vilas County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI
The radar
The Green Bay radar (KGRB), 115 km from the middle of the area, began a volume at 22:24 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, 10.5 hours before the alert went out and 117 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
- 193 J/kg
- Mixed-layer CIN
- -140 J/kg
- Mixed-layer LCL
- 922 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 126 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
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 26, 10:32 PM EDT | Mesoscale Discussion | SPC | Barry, Bay, Clinton, Eaton, Genesee, Gratiot and 13 more | 88 min |
| Aug 27, 7:01 PM EDT | Severe Thunderstorm Watch | SPC | Alger, Baraga, Delta, Dickinson, Gogebic, Houghton and 7 more | 7 hr |
| Aug 27, 3:24 PM EDT | Mesoscale Discussion | SPC | Ashland, Barron, Bayfield, Buffalo, Burnett, Chippewa and 20 more | 96 min |
| Aug 27, 3:57 PM EDT | Severe Thunderstorm Watch | SPC | Ashland, Barron, Bayfield, Buffalo, Burnett, Chippewa and 17 more | 7 hr |
Nearby
Mesoscale Discussions in Wisconsin, 2018Mesoscale Discussions in Michigan, 2018Every mesoscale discussion in 2018
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.