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There are only a couple of free radar data providers.

Saw someone below provide the definition, but the melting layer is mainly used to help determine precip type. Inner Light Gray Ring Where the beam top enters the Melting Layer Inner Solid White Ring Where the beam center enters the Melting Layer Outer Solid White Ring Where the beam center leaves the Melting Layer Outer Light Gray Ring Where the beam bottom leaves the Melting Layer In winter you will sometimes only see the outer ML rings and/or partial ML rings because the bottom of the melting layer is below the radar site itself. For example, ML 0.5° only shows up on BR/BV/SRV 0.5°. The melting layer heights can vary around the radar site The beam elevation angle varies with azimuth (typically at the start of a tilt) GRLevel3 only shows a particular tilt of the melting layer when its corresponding graphical radar product is displayed. These rings are not typically perfect circles due to two factors:

The freezing level is the top and the bottom is assumed to be 500 m below Manual entry of the melting layer top and bottom Since the radar beam increases in height with range, the melting layer lines typically form rings around the radar site. The melting layer itself is determined by the radar using three methods:Īutomated detection of the melting layer signature in CC and BR (when possible) Environmental model data (RAP). The Melting Layer (ML) radar product is a series of lines showing the position of the melting layer relative to the radar beam for a given tilt.