Alert archive / Wisconsin / Mesoscale Discussions in 2012
Mesoscale Discussion 1650
The Storm Prediction Center issued this mesoscale discussion at Jul 30, 2012, 1:26 PM EDT for 13 counties in Michigan; 27 counties in Wisconsin. It was in force for 64 min.
The area
The outline as issued.
The facts
- Issued
- Jul 30, 2012, 1:26 PM EDT (17:26 UTC)
- Expired
- Jul 30, 2012, 2:30 PM EDT
- In force
- 64 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 40 counties
Alger County, MI, Baraga County, MI, Benzie County, MI, Charlevoix County, MI, Delta County, MI, Dickinson County, MI, Iron County, MI, Leelanau County, MI, Luce County, MI, Mackinac County, MI, Marquette County, MI, Menominee County, MI, Schoolcraft County, MI, Brown County, WI, Calumet County, WI, Clark County, WI, Door County, WI, Eau Claire County, WI, Florence County, WI, Forest County, WI, Jackson County, WI, Kewaunee County, WI, Langlade County, WI, Lincoln County, WI, Manitowoc County, WI, Marathon County, WI, Marinette County, WI, Menominee County, WI, Oconto County, WI, Oneida County, WI, Outagamie County, WI, Portage County, WI, Price County, WI, Shawano County, WI, Taylor County, WI, Vilas County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI
The radar
The Marquette radar (KMQT), 104 km from the middle of the area, began a volume at 17:29 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, 5.4 hours before the alert went out and 128 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
- 455 J/kg
- Mixed-layer CIN
- -119 J/kg
- Mixed-layer LCL
- 805 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 132 m²/s²
- 0-3 km storm-relative helicity
- 114 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
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 |
|---|---|---|---|---|
| Jul 30, 2:28 PM EDT | Severe Thunderstorm Watch | SPC | Alger, Delta, Dickinson, Iron, Luce, Marquette and 2 more | 8 hr |
| Jul 30, 4:49 PM EDT | Mesoscale Discussion | SPC | Alger, Delta, Dickinson, Iron, Marquette, Menominee and 1 more | 56 min |
| Jul 30, 7:16 PM EDT | Mesoscale Discussion | SPC | Antrim, Benzie, Charlevoix, Delta, Emmet, Grand Traverse and 8 more | 59 min |
Nearby
Mesoscale Discussions in Wisconsin, 2012Mesoscale Discussions in Michigan, 2012Every mesoscale discussion in 2012
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.