Alert archive / Pennsylvania / Mesoscale Discussions in 2005
Mesoscale Discussion 869
The Storm Prediction Center issued this mesoscale discussion at May 13, 2005, 9:35 PM EDT for 7 counties in Ohio; 11 counties in Pennsylvania; 4 counties in West Virginia. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- May 13, 2005, 9:35 PM EDT (01:35 UTC)
- Expired
- May 13, 2005, 11:00 PM EDT
- In force
- 85 min
- Issued by
- the Storm Prediction Center
All 22 counties
Belmont County, OH, Columbiana County, OH, Harrison County, OH, Jefferson County, OH, Mahoning County, OH, Monroe County, OH, Trumbull County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Butler County, PA, Crawford County, PA, Greene County, PA, Lawrence County, PA, Mercer County, PA, Venango 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), 48 km from the middle of the area, began a volume at 01:39 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 nearest sounding before it
Pittsburgh, PA (KPIT), launched 00:00Z, 1.6 hours before the alert went out and 64 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
- 21 J/kg
- Mixed-layer CIN
- -140 J/kg
- Mixed-layer LCL
- 1637 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 145 m²/s²
- 0-3 km storm-relative helicity
- 265 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 13, 8:34 PM EDT | Mesoscale Discussion | SPC | Darke, Mercer, Paulding, Van Wert | 26 min |
| May 13, 8:50 PM EDT | Severe Thunderstorm Watch | SPC | Allen, Auglaize, Darke, Mercer, Putnam, Van Wert | 5 hr |
| May 14, 12:10 PM EDT | Severe Thunderstorm Watch | SPC | Lawrence | 7 hr |
| May 14, 1:59 PM EDT | Mesoscale Discussion | SPC | Athens, Gallia, Jackson, Meigs, Monroe, Vinton and 1 more | 91 min |
| May 14, 3:05 PM EDT | Severe Thunderstorm Watch | SPC | Belmont, Harrison, Jefferson, Monroe, Noble, Washington | 6 hr |
| May 14, 3:09 PM EDT | Mesoscale Discussion | SPC | Lawrence | 96 min |
| May 14, 4:52 PM EDT | Mesoscale Discussion | SPC | Belmont, Harrison, Jefferson, Monroe, Noble, Washington | 83 min |
| May 14, 3:25 PM EDT | Mesoscale Discussion | SPC | Jefferson | 95 min |
Nearby
Mesoscale Discussions in Pennsylvania, 2005Mesoscale Discussions in Ohio, 2005Mesoscale Discussions in West Virginia, 2005Every mesoscale discussion in 2005
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.