Alert archive / Michigan / Mesoscale Discussions in 2015
Mesoscale Discussion 1589
The Storm Prediction Center issued this mesoscale discussion at Aug 2, 2015, 6:08 PM EDT for 21 counties in Michigan. It was in force for 97 min.
The area
The outline as issued.
The facts
- Issued
- Aug 2, 2015, 6:08 PM EDT (22:08 UTC)
- Expired
- Aug 2, 2015, 7:45 PM EDT
- In force
- 97 min
- Issued by
- the Storm Prediction Center
All 21 counties
Bay County, MI, Clinton County, MI, Genesee County, MI, Gladwin County, MI, Gratiot County, MI, Ingham County, MI, Ionia County, MI, Isabella County, MI, Kent County, MI, Lapeer County, MI, Livingston County, MI, Mecosta County, MI, Midland County, MI, Montcalm County, MI, Muskegon County, MI, Newaygo County, MI, Oceana County, MI, Ottawa County, MI, Saginaw County, MI, Shiawassee County, MI, Tuscola County, MI
The radar
The Grand Rapids radar (KGRR), 70 km from the middle of the area, began a volume at 22:10 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, 10.1 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
- 12 J/kg
- Mixed-layer CIN
- -186 J/kg
- Mixed-layer LCL
- 1599 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 218 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, 5:21 AM EDT | Mesoscale Discussion | SPC | Gogebic, Iron, Ontonagon | 2 hr |
| Aug 2, 8:51 AM EDT | Mesoscale Discussion | SPC | Antrim, Benzie, Charlevoix, Crawford, Delta, Dickinson and 13 more | 2 hr |
| Aug 2, 9:51 AM EDT | Severe Thunderstorm Watch | SPC | Alcona, Alpena, Antrim, Arenac, Benzie, Charlevoix and 19 more | 7 hr |
| Aug 2, 12:49 PM EDT | Mesoscale Discussion | SPC | Crawford, Iosco, Missaukee, Montmorency, Ogemaw, Oscoda and 2 more | 56 min |
| Aug 2, 1:09 PM EDT | Mesoscale Discussion | SPC | Delta, Dickinson, Iron, Menominee | 2 hr |
| Aug 2, 2:56 PM EDT | Mesoscale Discussion | SPC | Clinton, Genesee, Ingham, Lapeer, Livingston, Macomb and 6 more | 64 min |
| Aug 2, 3:00 PM EDT | Mesoscale Discussion | SPC | Allegan, Barry, Calhoun, Clinton, Eaton, Gratiot and 13 more | 2 hr |
| Aug 2, 3:59 PM EDT | Severe Thunderstorm Watch | SPC | Alcona, Allegan, Alpena, Antrim, Arenac, Barry and 35 more | 7 hr |
| Aug 2, 6:27 PM EDT | Severe Thunderstorm Watch | SPC | Allegan, Barry, Bay, Calhoun, Clare, Clinton and 34 more | 6 hr |
Nearby
Mesoscale Discussions in Michigan, 2015Every mesoscale discussion in 2015
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.