Alert archive / Ohio / Mesoscale Discussions in 2020
Mesoscale Discussion 1797
The Storm Prediction Center issued this mesoscale discussion at Nov 15, 2020, 9:58 AM EST for 7 counties in Michigan; 28 counties in Ohio. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- Nov 15, 2020, 9:58 AM EST (14:58 UTC)
- Expired
- Nov 15, 2020, 11:30 AM EST
- In force
- 92 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch unlikely
- Chance of a watch
- 20%
All 35 counties
Lenawee County, MI, Macomb County, MI, Monroe County, MI, Oakland County, MI, Saint Clair County, MI, Washtenaw County, MI, Wayne County, MI, Allen County, OH, Ashland County, OH, Auglaize County, OH, Crawford County, OH, Cuyahoga County, OH, Defiance County, OH, Erie County, OH, Fulton County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Huron County, OH, Lake County, OH, Lorain County, OH, Lucas County, OH, Marion County, OH, Medina County, OH, Mercer County, OH, Ottawa County, OH, Paulding County, OH, Putnam County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Summit County, OH, Van Wert County, OH, Wood County, OH, Wyandot County, OH
The radar
The Cleveland radar (KCLE), 105 km from the middle of the area, began a volume at 15:03 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, 3.0 hours before the alert went out and 129 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 468 m above ground
- 0-6 km bulk shear
- 78 kt
- 0-1 km storm-relative helicity
- 466 m²/s²
- 0-3 km storm-relative helicity
- 424 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Nov 15, 11:33 AM EST | Mesoscale Discussion | SPC | Ashland, Ashtabula, Carroll, Champaign, Columbiana, Crawford and 24 more | 57 min |
| Nov 15, 11:51 AM EST | Severe Thunderstorm Watch | SPC | Ashland, Ashtabula, Athens, Carroll, Columbiana, Coshocton and 24 more | 3 hr |
| Nov 15, 12:27 PM EST | Mesoscale Discussion | SPC | Ashtabula, Cuyahoga, Geauga, Lake, Medina, Summit | 93 min |
Nearby
Mesoscale Discussions in Ohio, 2020Mesoscale Discussions in Michigan, 2020Every mesoscale discussion in 2020
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.