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Hudson River Ice Climatology

About the Project

Compilation of observed ice data probabilistic statistics (ice thickness, percent ice cover, and ice types) based on United States Coast Guard (USCG) daily ice reports along the tidal Hudson River during ice season (December to March). The ice thickness and ice cover area climatology was produced by fitting Generalized Extreme Value Cumulative Distribution Functions (GEV CDFs) to the empirical mean daily data for each ice region, when ice was present and reported.

Ice Data from 2006-2012 can be found on the NYS Clearinghouse Website, under Hudson River Ice Climatology.


Under the Hudson River Sustainable Shorelines Project, Stevens Institute analyzed Coast Guard imagery from 2004-2015 and authored  Tidal Hudson River Ice Cover Climatology. This report explains the methodology and results of this climatological and statistical analyses for the ice distributions of ice thickness and ice cover as well as ice types on the Hudson River Estuary.

The full report can be found HERE .


Information about and Constraints on the Use of this Dataset

Hudson Ice February 2011

Hudson Ice February 2011

This ice climatology dataset is based on a compilation of daily USCG ice reports, which have a limited history and scope and are empirical. It should not be thought of as an accurate description of ice conditions at any given year. Use at your own risk. The extensive metadata information accompanying this GIS layer should be read and understood. The scope here is to provide a probabilistic picture of the regional ice climatology in the Hudson to address the paucity of ice information and assist engineers knowledgeable of ice engineering techniques (for example, the United States Army Corp of Engineers Manual on Ice Engineering and other documents may be found here.) The uncertainty around the climatology itself is statistically expected to be within a factor of two of the reported regional ice thickness percentiles. The expansion of the underlying methodology to include future data should decrease this uncertainty further. Finally, for the effects of the seasonal ice cover to Hudson River hydrodynamics (currents, water levels, and mixing) one may read the following journal article “Large Seasonal Modulation of Tides Due to Ice Cover Friction In a Mid-Latitude Estuary” listed in Resources below.



Georgas, Nickitas. (Mar 2012). “Large Seasonal Modulation of Tides Due to Ice Cover Friction In a Mid-Latitude Estuary”, Journal of Physical Oceanography, American Meteorological Society. 3 (42), 352-369.

More information on ice on the Hudson River can be found HERE.

Hudson River National Estuarine Research Reserve

New York State Department of Environmental Conservation
NOAA National Estuarine Research Reserve System

Tivoli Bays Launch Closure – 2020

The canoe and kayak launch on the Kidd Lane access road at Tivoli Bays WMA is closed for renovations until further notice. At this time, DEC does not have an estimated completion date for the project. Please contact Nathan Ermer at 845-256-3047 for more information about this project. Thank you for your patience and understanding.