Alert archive / Wisconsin / Mesoscale Discussions in 2004
Mesoscale Discussion 1833
The Storm Prediction Center issued this mesoscale discussion at Aug 2, 2004, 12:44 PM EDT for 8 counties in Michigan; 9 counties in Wisconsin. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 2, 2004, 12:44 PM EDT (16:44 UTC)
- Expired
- Aug 2, 2004, 2:45 PM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
Counties Alger County, MI, Delta County, MI, Dickinson County, MI, Iron County, MI, Luce County, MI, Mackinac County, MI, Menominee County, MI, Schoolcraft County, MI, Florence County, WI, Forest County, WI, Langlade County, WI, Lincoln County, WI, Marinette County, WI, Menominee County, WI, Oconto County, WI, Oneida County, WI, Vilas County, WI
The radar
The Marquette radar (KMQT), 78 km from the middle of the area, began a volume at 16:45 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, 4.7 hours before the alert went out and 157 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
- 1119 J/kg
- Mixed-layer CIN
- -122 J/kg
- Mixed-layer LCL
- 845 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
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 2, 12:11 PM EDT | Mesoscale Discussion | SPC | Berrien | 2 hr |
| Aug 2, 1:31 PM EDT | Mesoscale Discussion | SPC | Allegan, Antrim, Arenac, Barry, Bay, Benzie and 44 more | 119 min |
| Aug 2, 2:05 PM EDT | Severe Thunderstorm Watch | SPC | Allegan, Antrim, Barry, Bay, Benzie, Calhoun and 41 more | 5 hr |
| Aug 2, 5:32 PM EDT | Mesoscale Discussion | SPC | Alcona, Alpena, Arenac, Barry, Bay, Calhoun and 34 more | 88 min |
| Aug 2, 9:35 AM EDT | Mesoscale Discussion | SPC | Adams, Buffalo, Calumet, Chippewa, Clark, Columbia and 19 more | 115 min |
| Aug 2, 11:25 AM EDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Calumet, Columbia, Dane, Dodge and 28 more | 6 hr |
Nearby
Mesoscale Discussions in Wisconsin, 2004Mesoscale Discussions in Michigan, 2004Every mesoscale discussion in 2004
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.