Alert archive / Wisconsin / Mesoscale Discussions in 2018
Mesoscale Discussion 977
The Storm Prediction Center issued this mesoscale discussion at Jul 1, 2018, 4:18 PM EDT for 5 counties in Michigan; 21 counties in Wisconsin. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- Jul 1, 2018, 4:18 PM EDT (20:18 UTC)
- Expired
- Jul 1, 2018, 5:45 PM EDT
- In force
- 87 min
- Issued by
- the Storm Prediction Center
All 26 counties
Delta County, MI, Luce County, MI, Mackinac County, MI, Menominee County, MI, Schoolcraft County, MI, Brown County, WI, Calumet County, WI, Dodge County, WI, Door County, WI, Fond du Lac County, WI, Jefferson County, WI, Kenosha County, WI, Kewaunee County, WI, Manitowoc County, WI, Marinette County, WI, Milwaukee County, WI, Oconto County, WI, Outagamie County, WI, Ozaukee County, WI, Racine County, WI, Rock County, WI, Sheboygan County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI, Winnebago County, WI
The radar
The Green Bay radar (KGRB), 81 km from the middle of the area, began a volume at 20:20 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, 8.3 hours before the alert went out and 80 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
- 10 J/kg
- Mixed-layer CIN
- -259 J/kg
- Mixed-layer LCL
- 1272 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 152 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Jun 30, 9:05 PM EDT | Mesoscale Discussion | SPC | Alger, Delta, Dickinson, Gogebic, Iron, Menominee | 85 min |
| Jul 1, 12:37 PM EDT | Mesoscale Discussion | SPC | Delta, Dickinson, Iron, Menominee | 83 min |
| Jul 1, 1:04 PM EDT | Tornado Watch | SPC | Alger, Delta, Dickinson, Iron, Luce, Marquette and 2 more | 6 hr |
| Jul 1, 2:37 PM EDT | Mesoscale Discussion | SPC | Alger, Baraga, Delta, Dickinson, Iron, Luce and 3 more | 53 min |
| Jul 1, 6:05 PM EDT | Mesoscale Discussion | SPC | Antrim, Benzie, Charlevoix, Cheboygan, Chippewa, Clare and 16 more | 2 hr |
| Jul 1, 6:35 PM EDT | Severe Thunderstorm Watch | SPC | Allegan, Antrim, Barry, Benzie, Charlevoix, Cheboygan and 22 more | 3 hr |
| Jul 1, 7:51 PM EDT | Mesoscale Discussion | SPC | Allegan, Berrien, Cass, Van Buren | 114 min |
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.