Alert archive / New Jersey / Mesoscale Discussions in 2025

Mesoscale Discussion 39

January 19, 20256 states

The Storm Prediction Center issued this mesoscale discussion at Jan 19, 2025, 4:34 PM EST for 6 states. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Jan 19, 2025, 4:34 PM EST (21:34 UTC)
Expired
Jan 19, 2025, 8:00 PM EST
In force
3 hr
Issued by
the Storm Prediction Center
Concerning
Heavy snow
All 25 counties

Berkshire County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Cheshire County, NH, Bergen County, NJ, Essex County, NJ, Hunterdon County, NJ, Morris County, NJ, Passaic County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Columbia County, NY, Dutchess County, NY, Orange County, NY, Putnam County, NY, Rockland County, NY, Ulster County, NY, Westchester County, NY, Lehigh County, PA, Monroe County, PA, Northampton County, PA, Pike County, PA, Windham County, VT

The radar

The Albany radar (KENX), 92 km from the middle of the area, began a volume at 21:37 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, 9.6 hours before the alert went out and 124 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2025-01-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2025-01-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -63 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
747 m above ground
0-6 km bulk shear
76 kt
0-1 km storm-relative helicity
-63 m²/s²
0-3 km storm-relative helicity
93 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.

IssuedProductOfficeCountiesLasted
Jan 19, 1:00 PM ESTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Cambria, Chester and 19 more5 hr

Nearby

Mesoscale Discussions in New Jersey, 2025Mesoscale Discussions in New York, 2025Mesoscale Discussions in Massachusetts, 2025Every mesoscale discussion in 2025

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.