Alert archive / Pennsylvania / Mesoscale Discussions in 2019
Mesoscale Discussion 358
The Storm Prediction Center issued this mesoscale discussion at Apr 14, 2019, 11:56 PM EDT for 5 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 14, 2019, 11:56 PM EDT (03:56 UTC)
- Expired
- Apr 15, 2019, 2:00 AM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 108 counties
Kent County, DE, New Castle County, DE, Sussex County, DE, Anne Arundel County, MD, Baltimore County, MD, Caroline County, MD, Carroll County, MD, Cecil County, MD, City of Baltimore, MD, Frederick County, MD, Harford County, MD, Howard County, MD, Kent County, MD, Montgomery County, MD, Queen Anne's County, MD, Talbot County, MD, Atlantic County, NJ, Bergen County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Essex County, NJ, Gloucester County, NJ, Hudson County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Passaic County, NJ, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Union County, NJ, Warren County, NJ, Albany County, NY, Bronx County, NY, Broome County, NY, Chemung County, NY, Chenango County, NY, Columbia County, NY, Cortland County, NY, Delaware County, NY, Dutchess County, NY, Fulton County, NY, Greene County, NY, Kings County, NY, Madison County, NY, Montgomery County, NY, New York County, NY, Oneida County, NY, Onondaga County, NY, Orange County, NY, Otsego County, NY, Putnam County, NY, Queens County, NY, Rensselaer County, NY, Richmond County, NY, Rockland County, NY, Schenectady County, NY, Schoharie County, NY, Schuyler County, NY, Sullivan County, NY, Tioga County, NY, Tompkins County, NY, Ulster County, NY, Westchester County, NY, Adams County, PA, Berks County, PA, Bradford County, PA, Bucks County, PA, Carbon County, PA, Centre County, PA, Chester County, PA, Clinton County, PA, Columbia County, PA, Cumberland County, PA, Dauphin County, PA, Delaware County, PA, Franklin County, PA, Huntingdon County, PA, Juniata County, PA, Lackawanna County, PA, Lancaster County, PA, Lebanon County, PA, Lehigh County, PA, Luzerne County, PA, Lycoming County, PA, Mifflin County, PA, Monroe County, PA, Montgomery County, PA, Montour County, PA, Northampton County, PA, Northumberland County, PA, Perry County, PA, Philadelphia County, PA, Pike County, PA, Schuylkill County, PA, Snyder County, PA, Sullivan County, PA, Susquehanna County, PA, Tioga County, PA, Union County, PA, Wayne County, PA, Wyoming County, PA, York County, PA
The radar
The Philadelphia radar (KDIX), 140 km from the middle of the area, began a volume at 03:59 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 00:00Z, 3.9 hours before the alert went out and 221 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
- 7 J/kg
- Mixed-layer CIN
- -95 J/kg
- Mixed-layer LCL
- 437 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 236 m²/s²
- 0-3 km storm-relative helicity
- 268 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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 |
|---|---|---|---|---|
| Apr 15, 1:05 AM EDT | Tornado Watch | SPC | Kent, New Castle, Sussex | 5 hr |
| Apr 15, 3:50 AM EDT | Mesoscale Discussion | SPC | Kent, New Castle, Sussex | 55 min |
| Apr 15, 12:41 AM EDT | Tornado Watch | SPC | Dorchester, Somerset, Wicomico, Worcester | 5 hr |
| Apr 15, 2:30 AM EDT | Mesoscale Discussion | SPC | Saint Mary's, Somerset | 60 min |
| Apr 14, 9:14 PM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Chemung, Schuyler, Steuben, Wyoming | 61 min |
| Apr 14, 9:56 PM EDT | Tornado Watch | SPC | Broome, Cayuga, Chemung, Chenango, Cortland, Delaware and 10 more | 5 hr |
| Apr 15, 12:33 AM EDT | Mesoscale Discussion | SPC | Essex, Fulton, Hamilton, Herkimer, Jefferson, Lewis and 8 more | 117 min |
| Apr 15, 12:44 AM EDT | Mesoscale Discussion | SPC | Montour, Northumberland, Snyder, Union | 61 min |
Nearby
Mesoscale Discussions in Pennsylvania, 2019Mesoscale Discussions in New York, 2019Mesoscale Discussions in New Jersey, 2019Every mesoscale discussion in 2019
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.