Storm description, surface observations, snowfall totals, and images courtesy of the National Climatic Data Center, the National Centers of Environmental Prediction, the Climate Prediction Center, the Hydrometeorological Prediction Center, the Mount Holly National Weather Service Office, the Upton National Weather Service Office, Rutgers University, Plymouth State University, the University of Illinois, the American Meteorological Society, Weather Graphics Technologies, AccuWeather, and the Weather Channel.

Table of Contents Storm Summary Regional Surface Observations National Weather Service Forecasts Surface Maps Satellite Imagery National Surface Weather Maps - Pressure and Fronts Only Continental Surface Weather Maps - Pressure and Fronts Only Sea Level Pressure and 1000 to 500 Millibar Thickness Maps 850 Millibar Maps 700 Millibar Maps 500 Millibar Maps 300 Millibar Maps 200 Millibar Maps National Radar Imagery Regional Radar Imagery Fort Dix Doppler Radar Imagery

Contoured Snowfall Totals from January 21, 2011

STORM DESCRIPTION A pair of low pressure systems brought another round of snow to northern and central New Jersey, with a mixture of snow, sleet and rain in southern New Jersey. Synoptic Discussion Two low pressure systems combined to produce this winter storm. The first low dropped southward over Lake Superior from Canada on the morning of the 20th, while the second low developed in Kentucky at about the same time. By the evening of the 20th, the northern low was near the eastern end of Lake Superior while the southern low was over West Virginia. By the morning of the 21st the two lows had begun to coalesce and strengthen, with the southern low centered just south of Rhode Island and the northern low located in southeastern Ontario. By the evening of the 21st, the now-merged lows had continued to strengthen and was centered near Nova Scotia. Local Discussion Precipitation overspread New Jersey from west to east just after midnight on January 21st. Across southeastern New Jersey, precipitation was mostly in the form of rain. Further north and west, a mixture of snow, sleet, freezing rain and rain fell across southwestern and east-central New Jersey. Still further north and west, precipitation was in the form of snow throughout the storm in west-central and northern New Jersey. Precipitation ended from west to east across the state by dawn on the 21st. Snowfall amounts were greatest in northern New Jersey and nil in southern New Jersey, with accumulations ranging from 3 to 7 inches in Bergen, Essex, Hudson, Hunterdon, Middlesex, Morris, Passaic, Somerset, Sussex and Warren counties and a coating to 4 inches in Burlington, Camden, Gloucester, Mercer, Monmouth and Ocean counties. Little or no snow fell in Atlantic, Cape May, Cumberland and Salem counties. Ice accumulations were minimal.

New Jersey Snowfall Totals

Individual Snowfall Totals from January 21, 2011

Table of Contents Storm Summary Regional Surface Observations National Weather Service Forecasts Surface Maps Satellite Imagery National Surface Weather Maps - Pressure and Fronts Only Continental Surface Weather Maps - Pressure and Fronts Only Sea Level Pressure and 1000 to 500 Millibar Thickness Maps 850 Millibar Maps 700 Millibar Maps 500 Millibar Maps 300 Millibar Maps 200 Millibar Maps National Radar Imagery Regional Radar Imagery Fort Dix Doppler Radar Imagery

Snow storm, December 26-27, 2010 Snow storm, January 7, 2011 Snow storm, January 8, 2011 Snow storm, January 11-12, 2011 Snow and ice storm, January 17-18, 2011 Snow storm, January 21, 2011 Snow and ice storm, January 26-27, 2011 Snow storm, February 21-22, 2011 Back to Ray's Winter Storm Archive

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