Alert archive / Michigan / Mesoscale Discussions in 2004
Mesoscale Discussion 1402
The Storm Prediction Center issued this mesoscale discussion at Jun 23, 2004, 11:10 PM EDT for 37 counties in Michigan; 5 counties in Wisconsin. It was in force for 95 min.
The area
The outline as issued.
The facts
- Issued
- Jun 23, 2004, 11:10 PM EDT (03:10 UTC)
- Expired
- Jun 24, 2004, 12:45 AM EDT
- In force
- 95 min
- Issued by
- the Storm Prediction Center
All 42 counties
Allegan County, MI, Barry County, MI, Branch County, MI, Calhoun County, MI, Clinton County, MI, Eaton County, MI, Genesee County, MI, Gratiot County, MI, Hillsdale County, MI, Ingham County, MI, Ionia County, MI, Isabella County, MI, Jackson County, MI, Kalamazoo County, MI, Kent County, MI, Lake County, MI, Lapeer County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Manistee County, MI, Mason County, MI, Mecosta County, MI, Midland County, MI, Montcalm County, MI, Muskegon County, MI, Newaygo County, MI, Oakland County, MI, Oceana County, MI, Osceola County, MI, Ottawa County, MI, Saginaw County, MI, Shiawassee County, MI, Tuscola County, MI, Van Buren County, MI, Washtenaw County, MI, Wayne County, MI, Kenosha County, WI, Milwaukee County, WI, Ozaukee County, WI, Racine County, WI, Sheboygan County, WI
The radar
The Grand Rapids radar (KGRR), 52 km from the middle of the area, began a volume at 03:12 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
Detroit, MI (KDTX), launched 00:00Z, 3.2 hours before the alert went out and 226 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
- 742 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 1134 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 142 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.4
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 |
|---|---|---|---|---|
| Jun 23, 11:30 PM EDT | Severe Thunderstorm Watch | SPC | Arenac, Barry, Bay, Branch, Calhoun, Cass and 40 more | 6 hr |
| Jun 24, 2:37 AM EDT | Mesoscale Discussion | SPC | Branch, Calhoun, Cass, Eaton, Genesee, Hillsdale and 15 more | 53 min |
Nearby
Mesoscale Discussions in Michigan, 2004Mesoscale Discussions in Wisconsin, 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.