Marine & Coastal Weather from Maine Harbors
Base Reflectivity Radar
Northeast Sector
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Base Reflectivity Radar (S Rng)
A weather surveillance radar site sends out a beam of energy which reflects off objects (precipitation, clouds, trees, buildings, birds, etc.). Echoes from surface targets appear in almost all radar reflectivity images. "Ground clutter" generally appears within a radius of 20 nm.

The amount of energy which is received back at the radar dish is measured in units of DBZ (decibels of Z - reflectivity). The higher the DBZ value the larger the object, i.e. large raindrops and hail produce high DBZ values. In general, DBZ values greater than 20 indicate areas where precipitation is reaching the ground.

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Maine Harbors obtains forecasts and other information from the National Weather Service - (IWIN) and Environment Canada. US Forecasts are public domain and cannot be copyrighted. Canadian forecasts are copyright of Environment Canada.

Limitation of Liability - Maine Harbors does not warrant the accuracy, completeness, merchantability or fitness for a particular purpose of any of the weather information offered through this service. Under no circumstances shall Maine Harbors be liable to you or any other person for any indirect, special, incidental, or consequential damages arising from the use of this service.

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