Alert archive / Pennsylvania / Mesoscale Discussions in 2016
Mesoscale Discussion 1317
The Storm Prediction Center issued this mesoscale discussion at Jul 18, 2016, 11:40 AM EDT for 8 states. It was in force for 95 min.
The area
The outline as issued.
The facts
- Issued
- Jul 18, 2016, 11:40 AM EDT (15:40 UTC)
- Expired
- Jul 18, 2016, 1:15 PM EDT
- In force
- 95 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 79 counties
New Castle County, DE, Berkshire County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Norfolk County, MA, Worcester County, MA, Baltimore County, MD, Carroll County, MD, Cecil County, MD, Harford County, MD, Bergen County, NJ, Essex County, NJ, Hudson County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Passaic County, NJ, Somerset County, NJ, Sussex County, NJ, Union County, NJ, Warren County, NJ, Albany County, NY, Bronx County, NY, Columbia County, NY, Delaware County, NY, Dutchess County, NY, Fulton County, NY, Greene County, NY, Herkimer County, NY, Kings County, NY, Montgomery County, NY, New York County, NY, Orange County, NY, Putnam County, NY, Queens County, NY, Rensselaer County, NY, Richmond County, NY, Rockland County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Sullivan County, NY, Ulster County, NY, Warren County, NY, Washington County, NY, Westchester County, NY, Adams County, PA, Berks County, PA, Bucks County, PA, Carbon County, PA, Chester County, PA, Columbia County, PA, Cumberland County, PA, Dauphin County, PA, Delaware County, PA, Franklin County, PA, Lackawanna County, PA, Lancaster County, PA, Lebanon County, PA, Lehigh County, PA, Luzerne County, PA, Monroe County, PA, Montgomery County, PA, Northampton County, PA, Northumberland County, PA, Perry County, PA, Philadelphia County, PA, Pike County, PA, Schuylkill County, PA, Wayne County, PA, Wyoming County, PA, York County, PA, Bristol County, RI, Kent County, RI, Providence County, RI, Bennington County, VT
The radar
The Albany radar (KENX), 133 km from the middle of the area, began a volume at 15:42 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
Brookhaven, NY (KOKX), launched 12:00Z, 3.7 hours before the alert went out and 161 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
- -127 J/kg
- Mixed-layer LCL
- 1554 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 128 m²/s²
- 0-3 km storm-relative helicity
- 123 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
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 |
|---|---|---|---|---|
| Jul 18, 12:05 PM EDT | Severe Thunderstorm Watch | SPC | Greater Bridgeport Planning Region, Capitol Planning Region, Northwest Hills Planning Region, Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region and 1 more | 8 hr |
| Jul 18, 3:21 PM EDT | Mesoscale Discussion | SPC | 84 min | |
| Jul 18, 6:49 PM EDT | Mesoscale Discussion | SPC | 86 min | |
| Jul 18, 1:42 PM EDT | Severe Thunderstorm Watch | SPC | Kent, New Castle, Sussex | 6 hr |
| Jul 18, 3:09 PM EDT | Mesoscale Discussion | SPC | Kent, New Castle, Sussex | 66 min |
| Jul 18, 6:22 PM EDT | Mesoscale Discussion | SPC | Sussex | 113 min |
| Jul 18, 10:32 AM EDT | Mesoscale Discussion | SPC | Clinton, Essex, Franklin, Hamilton, Herkimer, Lewis and 3 more | 118 min |
| Jul 18, 11:12 AM EDT | Severe Thunderstorm Watch | SPC | Clinton, Essex, Franklin, Jefferson, Lewis, Oswego and 1 more | 9 hr |
Nearby
Mesoscale Discussions in Pennsylvania, 2016Mesoscale Discussions in New York, 2016Mesoscale Discussions in New Jersey, 2016Every mesoscale discussion in 2016
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.