Channel numbers, e.g. (WX1, WX2) etc. have no special significance but are often designated this way in consumer equipment. Other channel numbering schemes are also prevalent.

The order of channels shown is the order they were established and is slowly becoming less “popular” over time than a numerical ordering of channels.

See National Weather Service Marine Products Via NOAA Weather Radio and the NOAA Weather Radio Homepage for more information.

Source: americanboating.org & Navigation Center of the U.S. Coast Guard