Alert archive / Michigan / Mesoscale Discussions in 2009
Mesoscale Discussion 989
The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2009, 3:34 PM EDT for 6 counties in Indiana; 21 counties in Michigan. It was in force for 56 min.
The area
The outline as issued.
The facts
- Issued
- Jun 8, 2009, 3:34 PM EDT (19:34 UTC)
- Expired
- Jun 8, 2009, 4:30 PM EDT
- In force
- 56 min
- Issued by
- the Storm Prediction Center
All 27 counties
Elkhart County, IN, Kosciusko County, IN, LaGrange County, IN, Marshall County, IN, Noble County, IN, Steuben County, IN, Barry County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Clinton County, MI, Eaton County, MI, Genesee County, MI, Hillsdale County, MI, Ingham County, MI, Ionia County, MI, Jackson County, MI, Kalamazoo County, MI, Lapeer County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Oakland County, MI, Saint Joseph County, MI, Shiawassee County, MI, Washtenaw County, MI, Wayne County, MI
The radar
The Grand Rapids radar (KGRR), 67 km from the middle of the area, began a volume at 19:36 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 12:00Z, 7.6 hours before the alert went out and 119 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 767 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 136 m²/s²
- 0-3 km storm-relative helicity
- 206 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
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 8, 9:49 AM EDT | Mesoscale Discussion | SPC | Clay, Daviess, Dubois, Gibson, Greene, Knox and 12 more | 86 min |
| Jun 8, 12:54 PM EDT | Mesoscale Discussion | SPC | Benton, Jasper, Lake, Newton, Porter, Pulaski | 96 min |
| Jun 8, 4:53 PM EDT | Mesoscale Discussion | SPC | Jasper, Lake, LaPorte, Newton, Porter | 67 min |
| Jun 8, 6:46 PM EDT | Mesoscale Discussion | SPC | LaGrange | 59 min |
| Jun 8, 4:02 PM EDT | Tornado Watch | SPC | Allegan, Barry, Bay, Calhoun, Clinton, Eaton and 27 more | 6 hr |
Nearby
Mesoscale Discussions in Michigan, 2009Mesoscale Discussions in Indiana, 2009Every mesoscale discussion in 2009
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.