Alert archive / Michigan / Mesoscale Discussions in 2004
Mesoscale Discussion 1840
The Storm Prediction Center issued this mesoscale discussion at Aug 2, 2004, 5:32 PM EDT for 40 counties in Michigan. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- Aug 2, 2004, 5:32 PM EDT (21:32 UTC)
- Expired
- Aug 2, 2004, 7:00 PM EDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
All 40 counties
Alcona County, MI, Alpena County, MI, Arenac County, MI, Barry County, MI, Bay County, MI, Calhoun County, MI, Clare County, MI, Clinton County, MI, Crawford County, MI, Eaton County, MI, Genesee County, MI, Gladwin County, MI, Gratiot County, MI, Huron County, MI, Ingham County, MI, Ionia County, MI, Iosco County, MI, Isabella County, MI, Jackson County, MI, Kent County, MI, Lapeer County, MI, Livingston County, MI, Macomb County, MI, Mecosta County, MI, Midland County, MI, Missaukee County, MI, Montcalm County, MI, Montmorency County, MI, Oakland County, MI, Ogemaw County, MI, Osceola County, MI, Oscoda County, MI, Roscommon County, MI, Saginaw County, MI, Saint Clair County, MI, Sanilac County, MI, Shiawassee County, MI, Tuscola County, MI, Washtenaw County, MI, Wayne County, MI
The radar
The Detroit radar (KDTX), 103 km from the middle of the area, began a volume at 21:33 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 nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 9.5 hours before the alert went out and 102 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
- 674 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 1053 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 36 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 |
|---|---|---|---|---|
| Aug 2, 12:11 PM EDT | Mesoscale Discussion | SPC | Berrien | 2 hr |
| Aug 2, 12:44 PM EDT | Mesoscale Discussion | SPC | Alger, Delta, Dickinson, Iron, Luce, Mackinac and 2 more | 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 |
Nearby
Mesoscale 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.