Alert archive / Pennsylvania / Mesoscale Discussions in 2018
Mesoscale Discussion 725
The Storm Prediction Center issued this mesoscale discussion at Jun 13, 2018, 6:10 PM EDT for 8 counties in Ohio; 37 counties in Pennsylvania; 4 counties in West Virginia. It was in force for 95 min.
The area
The outline as issued.
The facts
- Issued
- Jun 13, 2018, 6:10 PM EDT (22:10 UTC)
- Expired
- Jun 13, 2018, 7:45 PM EDT
- In force
- 95 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 49 counties
Belmont County, OH, Carroll County, OH, Columbiana County, OH, Guernsey County, OH, Harrison County, OH, Jefferson County, OH, Muskingum County, OH, Tuscarawas County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Bedford County, PA, Blair County, PA, Butler County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clarion County, PA, Clearfield County, PA, Clinton County, PA, Elk County, PA, Fayette County, PA, Forest County, PA, Franklin County, PA, Fulton County, PA, Greene County, PA, Huntingdon County, PA, Indiana County, PA, Jefferson County, PA, Juniata County, PA, Lawrence County, PA, Lycoming County, PA, McKean County, PA, Mercer County, PA, Mifflin County, PA, Perry County, PA, Potter County, PA, Snyder County, PA, Somerset County, PA, Tioga County, PA, Union County, PA, Venango County, PA, Warren County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Marshall County, WV, Ohio County, WV
The radar
The Pittsburgh radar (KPBZ), 72 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
Pittsburgh, PA (KAGC), launched 12:00Z, 10.2 hours before the alert went out and 68 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
- 191 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 496 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 107 m²/s²
- 0-3 km storm-relative helicity
- 112 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.3
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 |
|---|---|---|---|---|
| Jun 13, 4:14 PM EDT | Mesoscale Discussion | SPC | Butler, Champaign, Clark, Clinton, Coshocton, Darke and 22 more | 2 hr |
| Jun 13, 6:33 PM EDT | Severe Thunderstorm Watch | SPC | Belmont, Jefferson | 4 hr |
| Jun 13, 3:30 PM EDT | Mesoscale Discussion | SPC | Elk, Forest, McKean, Potter, Tioga, Warren | 60 min |
| Jun 13, 4:06 PM EDT | Severe Thunderstorm Watch | SPC | Bradford, Lackawanna, Luzerne, McKean, Potter, Susquehanna and 4 more | 7 hr |
| Jun 13, 7:12 PM EDT | Mesoscale Discussion | SPC | Bradford, Lackawanna, McKean, Potter, Sullivan, Susquehanna and 4 more | 93 min |
Nearby
Mesoscale Discussions in Pennsylvania, 2018Mesoscale Discussions in Ohio, 2018Mesoscale Discussions in West Virginia, 2018Every mesoscale discussion in 2018
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.