December 10, 2013 Storm Summary

December 10, 2013 Snow

12.10.13_1408The first widespread 1+ inch snowstorm of the winter of 2013-14 affected the NYC area on December 10, with a quick round of moderate to locally heavy snow moving through in the morning to early afternoon hours associated with a frontal boundary shifting offshore. Snow totals generally ranged from 1 to 4 inches across the area, with totals locally up to 5 inches over southwestern CT and southwest of the area into SE PA and Maryland.

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December 10, 2013 Storm Archive

NWS Regional Radar


Storm Synopsis

Surface analysis by the Weather Prediction Center (WPC) for Tuesday, 12/10 at 18z (1pm), depicting the frontal boundary near North Carolina.

usfntsfc18wbgFollowing the departure of the December 8-9 system from the region, the frontal boundary slowly shifted southeast off the coast, with a wave of low pressure developing off the Mid Atlantic coast, and despite a lack of a well defined surface low pressure, produced widespread precipitation over the region ahead of an approaching strong mid level shortwave. The system was quick moving given a progressive flow aloft, with precipitation only lasting for a few hours before moving out of the area with the frontal boundary continuing to gradually shift east.



Forecasting The Storm

December 7 – Some Snow/Ice, Then Cold
December 9 – Snow Likely Tomorrow
December 9 Evening – Snow Tomorrow
December 10 Storm Updates


Post-Storm Analysis

This section will be added soon.



Storm Timeline in the Northeast

Regional radar image from 9:08 AM EDT 12/10, from the National Weather Service. Widespread moderate snow covered the area, but quickly moved out after this time frame.

12.10.13_1408Most of the snow with the system was associated with a band of moderate to heavy snow that initially approached the area from the west, reaching north NJ/SE NY by 6-7am, NYC/coastal CT by 8am, and Long Island by 9am. Surface temperatures were generally in the upper 20s to low 30s, supporting accumulations from NYC and north/west, but with parts of Long Island struggling to see much accumulations due to warmer surface temperatures. The moderate snow band quickly made its way out of the area, moving out of NYC by 10am and Long Island by 11am. Occasional light snow persisted afterwards, but with a temporary dry slot over northern NJ, SE NY and CT between 11am-12pm as moderate snow developed to the north of the area as well, towards central NY state. Snow moved out of NYC and locations further west around 3pm and east of NYC by 4pm.



Storm Impact and Precipitation Totals

12.10.13_snowThe storm system produced the first widespread 1+ inch snow event of the winter across the NYC area and the second over Philadelphia and Maryland, which were previously affected by unexpected heavy snow just 2 days earlier. An narrow swath of 4-6 inches of snow set up from northern Maryland into southeast PA and western New Jersey, with snow totals elsewhere generally in the 1-4 inch range along a narrow SW to NE axis, extending into southern NY state and New England.

In the NYC area, snow totals were around 2-4 inches in the immediate NYC area and southern CT, 1-2″ in northwestern areas, and less than 2″ over Long Island, where warmer surface temperatures limited snow accumulations. The highest snow total in the area was 5.5″ in Prospect, CT (New Haven).

Below is a list of selected snow reports across the area from the National Weather Service, listed by highest total from each county:

Northern NJ:
3.1″ – Cedar Grove, NJ (Essex)
3.0″ – Oakland, NJ (Bergen)
2.5″ – West Milford, NJ (Passaic)
2.5″ – Westfield, NJ (Union)
1.8″ – Harrison, NJ (Hudson)

Southeast NY:
3.9″ – Armonk, NY (Westchester)
3.5″ – Brewster, NY (Putnam)
2.5″ – Nanuet, NY (Rockland)
1.7″ – Middletown, NY (Orange)

New York City:
3.0″ – Fieldston, NY (Bronx)
2.5″ – Bayside, NY (Queens)
2.5″ – Great Kills, NY (Staten Island)
1.5″ – Sheepshead Bay, NY (Brooklyn)
1.4″ – Central Park, NY (Manhattan)

Long Island and South CT:
5.5″ – Prospect, CT (New Haven)
4.3″ – Cromwell, CT (Middlesex)

3.9″ – Newtown, CT (Fairfield)
3.5″ – Gilman, CT (New London)
3.1″ – Melville, NY (Suffolk)
3.0″ – Albertson, NY (Nassau)

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