Alert archive / Michigan / Mesoscale Discussions in 2014
Mesoscale Discussion 583
The Storm Prediction Center issued this mesoscale discussion at May 12, 2014, 2:29 PM EDT for 22 counties in Michigan. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- May 12, 2014, 2:29 PM EDT (18:29 UTC)
- Expired
- May 12, 2014, 4:00 PM EDT
- In force
- 91 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 22 counties
Allegan County, MI, 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, Kent County, MI, Lenawee County, MI, Livingston County, MI, Montcalm County, MI, Ottawa County, MI, Saint Joseph County, MI, Shiawassee County, MI, Van Buren County, MI, Washtenaw County, MI
The radar
The Grand Rapids radar (KGRR), 48 km from the middle of the area, began a volume at 18:31 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, 6.5 hours before the alert went out and 152 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
- 1025 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 126 m²/s²
- 0-3 km storm-relative helicity
- 117 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 |
|---|---|---|---|---|
| May 12, 2:41 PM EDT | Severe Thunderstorm Watch | SPC | Allegan, Barry, Calhoun, Clinton, Eaton, Gratiot and 20 more | 7 hr |
| May 12, 4:44 PM EDT | Mesoscale Discussion | SPC | Allegan, Barry, Calhoun, Clinton, Eaton, Genesee and 17 more | 61 min |
| May 12, 7:05 PM EDT | Mesoscale Discussion | SPC | Allegan, Barry, Calhoun, Clinton, Eaton, Genesee and 17 more | 55 min |
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.