Alert archive / Michigan / Mesoscale Discussions in 2023
Mesoscale Discussion 2039
The Storm Prediction Center issued this mesoscale discussion at Aug 24, 2023, 4:44 PM EDT for LaGrange County, Steuben County, Indiana; 24 counties in Michigan; Fulton County, Lucas County, Williams County, Ohio. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 24, 2023, 4:44 PM EDT (20:44 UTC)
- Expired
- Aug 24, 2023, 7:15 PM EDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch likely
- Chance of a watch
- 95%
All 29 counties
LaGrange County, IN, Steuben County, IN, Allegan County, MI, Barry County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Clinton County, MI, Eaton County, MI, Gratiot 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, Monroe County, MI, Montcalm County, MI, Ottawa County, MI, Saint Joseph County, MI, Shiawassee County, MI, Van Buren County, MI, Washtenaw County, MI, Wayne County, MI, Fulton County, OH, Lucas County, OH, Williams County, OH
The radar
The Grand Rapids radar (KGRR), 74 km from the middle of the area, began a volume at 20:46 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 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, 8.7 hours before the alert went out and 156 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
- 1559 J/kg
- Mixed-layer CIN
- -150 J/kg
- Mixed-layer LCL
- 491 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 204 m²/s²
- 0-3 km storm-relative helicity
- 258 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.9
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 4:03 AM EDT | Mesoscale Discussion | SPC | Adams, Allen, Blackford, DeKalb, Huntington, Jay and 4 more | 117 min |
| Aug 24, 12:28 AM EDT | Mesoscale Discussion | SPC | Bay, Clinton, Genesee, Gladwin, Gratiot, Isabella and 10 more | 2 hr |
| Aug 24, 6:35 PM EDT | Severe Thunderstorm Watch | SPC | Allegan, Barry, Bay, Berrien, Branch, Calhoun and 37 more | 5 hr |
| Aug 23, 10:17 PM EDT | Mesoscale Discussion | SPC | Ashland, Belmont, Coshocton, Erie, Guernsey, Holmes and 11 more | 118 min |
Nearby
Mesoscale Discussions in Michigan, 2023Mesoscale Discussions in Ohio, 2023Mesoscale Discussions in Indiana, 2023Every mesoscale discussion in 2023
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.