Alert archive / New Jersey / Mesoscale Discussions in 2020

Mesoscale Discussion 802

June 3, 202013 counties in New Jersey; 10 counties in New York; 7 counties in Pennsylvania

The Storm Prediction Center issued this mesoscale discussion at Jun 3, 2020, 6:58 PM EDT for 13 counties in New Jersey; 10 counties in New York; 7 counties in Pennsylvania. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Jun 3, 2020, 6:58 PM EDT (22:58 UTC)
Expired: Jun 3, 2020, 8:30 PM EDT
In force: 92 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch unlikely
Chance of a watch: 20%

All 30 counties

Bergen County, NJ, Essex County, NJ, Hudson County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Passaic County, NJ, Somerset County, NJ, Sussex County, NJ, Union County, NJ, Warren County, NJ, Bronx County, NY, Kings County, NY, Nassau County, NY, New York County, NY, Orange County, NY, Queens County, NY, Richmond County, NY, Rockland County, NY, Sullivan County, NY, Westchester County, NY, Lackawanna County, PA, Monroe County, PA, Northampton County, PA, Pike County, PA, Susquehanna County, PA, Wayne County, PA, Wyoming County, PA

The radar

The Philadelphia radar (KDIX), 112 km from the middle of the area, began a volume at 22:59 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 nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 11.0 hours before the alert went out and 126 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1089 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 247 m²/s²
0-3 km storm-relative helicity: 376 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 3, 10:08 AM EDT	Severe Thunderstorm Watch	SPC	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 8 more	4 hr
Jun 3, 11:34 AM EDT	Mesoscale Discussion	SPC	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 8 more	86 min
Jun 3, 3:52 PM EDT	Severe Thunderstorm Watch	SPC	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	6 hr
Jun 3, 7:44 PM EDT	Mesoscale Discussion	SPC	Atlantic, Burlington, Camden, Gloucester, Ocean, Salem	91 min
Jun 2, 9:26 PM EDT	Mesoscale Discussion	SPC	Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 4 more	3 hr
Jun 3, 5:12 AM EDT	Mesoscale Discussion	SPC	Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 3 more	2 hr
Jun 3, 8:32 AM EDT	Mesoscale Discussion	SPC	Adams, Armstrong, Berks, Blair, Bradford, Butler and 38 more	118 min
Jun 3, 3:10 PM EDT	Mesoscale Discussion	SPC	Adams, Allegheny, Armstrong, Beaver, Bedford, Blair and 32 more	2 hr

Nearby

Mesoscale Discussions in New Jersey, 2020 Mesoscale Discussions in New York, 2020 Mesoscale Discussions in Pennsylvania, 2020 Every mesoscale discussion in 2020

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.