Alert archive / Ohio / Mesoscale Discussions in 2012
Mesoscale Discussion 1727
The Storm Prediction Center issued this mesoscale discussion at Aug 9, 2012, 4:18 PM EDT for 5 states. It was in force for 57 min.
The area
The outline as issued.
The facts
- Issued
- Aug 9, 2012, 4:18 PM EDT (20:18 UTC)
- Expired
- Aug 9, 2012, 5:15 PM EDT
- In force
- 57 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 69 counties
Ohio County, IN, Switzerland County, IN, Bath County, KY, Boone County, KY, Bourbon County, KY, Bracken County, KY, Campbell County, KY, Carroll County, KY, Carter County, KY, Fleming County, KY, Franklin County, KY, Gallatin County, KY, Grant County, KY, Greenup County, KY, Harrison County, KY, Kenton County, KY, Lewis County, KY, Mason County, KY, Nicholas County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Rowan County, KY, Scott County, KY, Adams County, OH, Athens County, OH, Belmont County, OH, Brown County, OH, Carroll County, OH, Clermont County, OH, Columbiana County, OH, Fairfield County, OH, Gallia County, OH, Guernsey County, OH, Harrison County, OH, Highland County, OH, Hocking County, OH, Jackson County, OH, Jefferson County, OH, Lawrence County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Ross County, OH, Scioto County, OH, Tuscarawas County, OH, Vinton County, OH, Washington County, OH, Allegheny County, PA, Beaver County, PA, Greene County, PA, Washington County, PA, Brooke County, WV, Hancock County, WV, Jackson County, WV, Marshall County, WV, Mason County, WV, Ohio County, WV, Pleasants County, WV, Ritchie County, WV, Tyler County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV
The radar
The Cincinnati radar (KILN), 85 km from the middle of the area, began a volume at 20:22 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
Cncnati-Daytn, OH (KILN), launched 12:00Z, 8.3 hours before the alert went out and 83 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
- 946 J/kg
- Mixed-layer CIN
- -111 J/kg
- Mixed-layer LCL
- 1085 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
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 9, 4:16 PM EDT | Mesoscale Discussion | SPC | Benton, Blackford, Boone, Carroll, Cass, Clinton and 19 more | 89 min |
| Aug 9, 5:02 PM EDT | Severe Thunderstorm Watch | SPC | Benton, Boone, Carroll, Cass, Clinton, Fountain and 15 more | 4 hr |
| Aug 9, 4:41 PM EDT | Severe Thunderstorm Watch | SPC | Bracken, Grant, Lewis, Mason, Owen, Pendleton and 1 more | 5 hr |
| Aug 9, 12:46 PM EDT | Mesoscale Discussion | SPC | Bradford, Cameron, Lycoming, Potter, Sullivan, Susquehanna and 2 more | 89 min |
Nearby
Mesoscale Discussions in Ohio, 2012Mesoscale Discussions in Kentucky, 2012Mesoscale Discussions in West Virginia, 2012Every mesoscale discussion in 2012
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.