Alert archive / Michigan / Mesoscale Discussions in 2014
Mesoscale Discussion 1656
The Storm Prediction Center issued this mesoscale discussion at Sep 1, 2014, 2:45 PM EDT for 42 counties in Michigan. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- Sep 1, 2014, 2:45 PM EDT (18:45 UTC)
- Expired
- Sep 1, 2014, 4:15 PM EDT
- In force
- 90 min
- Issued by
- the Storm Prediction Center
All 42 counties
Alcona County, MI, Alpena County, MI, Arenac County, MI, Barry County, MI, Bay County, MI, Branch County, MI, Calhoun County, MI, Cheboygan County, MI, Chippewa County, MI, Clare County, MI, Clinton County, MI, Crawford County, MI, Eaton County, MI, Emmet County, MI, Genesee County, MI, Gladwin County, MI, Gratiot County, MI, Hillsdale County, MI, Huron County, MI, Ingham County, MI, Ionia County, MI, Iosco County, MI, Isabella County, MI, Jackson County, MI, Kalamazoo County, MI, Lapeer County, MI, Lenawee County, MI, Livingston County, MI, Midland County, MI, Montcalm County, MI, Montmorency County, MI, Oakland County, MI, Ogemaw County, MI, Oscoda County, MI, Otsego County, MI, Presque Isle County, MI, Roscommon County, MI, Saginaw County, MI, Saint Joseph County, MI, Shiawassee County, MI, Tuscola County, MI, Washtenaw County, MI
The radar
The NCL Michigan radar (KAPX), 120 km from the middle of the area, began a volume at 18:46 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, 6.8 hours before the alert went out and 145 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
- 555 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 695 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 60 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 |
|---|---|---|---|---|
| Sep 1, 12:16 PM EDT | Mesoscale Discussion | SPC | Alpena, Antrim, Arenac, Bay, Charlevoix, Cheboygan and 27 more | 89 min |
| Sep 1, 1:23 PM EDT | Severe Thunderstorm Watch | SPC | Alcona, Alpena, Antrim, Arenac, Charlevoix, Cheboygan and 14 more | 5 hr |
Nearby
Mesoscale Discussions in Michigan, 2014Every mesoscale discussion in 2014
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.