Alert archive / Pennsylvania / Mesoscale Discussions in 2015
Mesoscale Discussion 1544
The Storm Prediction Center issued this mesoscale discussion at Jul 26, 2015, 3:34 PM EDT for 5 states. It was in force for 116 min.
The area
The outline as issued.
The facts
- Issued
- Jul 26, 2015, 3:34 PM EDT (19:34 UTC)
- Expired
- Jul 26, 2015, 5:30 PM EDT
- In force
- 116 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 5%
All 48 counties
Sussex County, NJ, Broome County, NY, Delaware County, NY, Dutchess County, NY, Orange County, NY, Putnam County, NY, Sullivan County, NY, Ulster County, NY, Carroll County, OH, Columbiana County, OH, Jefferson County, OH, Mahoning County, OH, Stark County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Bradford County, PA, Butler County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clarion County, PA, Clearfield County, PA, Clinton County, PA, Columbia County, PA, Elk County, PA, Forest County, PA, Indiana County, PA, Jefferson County, PA, Lackawanna County, PA, Lawrence County, PA, Luzerne County, PA, Lycoming County, PA, Mercer County, PA, Monroe County, PA, Montour County, PA, Northumberland County, PA, Pike County, PA, Potter County, PA, Sullivan County, PA, Susquehanna County, PA, Tioga County, PA, Union County, PA, Venango County, PA, Wayne County, PA, Wyoming County, PA, Brooke County, WV, Hancock County, WV
The radar
The State College radar (KCCX), 70 km from the middle of the area, began a volume at 19:36 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 (KAGC), launched 12:00Z, 7.6 hours before the alert went out and 253 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
- 11 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 1256 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Jul 26, 4:10 PM EDT | Mesoscale Discussion | SPC | Belmont, Brown, Butler, Clark, Clermont, Clinton and 26 more | 2 hr |
Nearby
Mesoscale Discussions in Pennsylvania, 2015Mesoscale Discussions in New York, 2015Mesoscale Discussions in Ohio, 2015Every mesoscale discussion in 2015
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.