A multiple freezing level (MULT FRZLVL) boundary within a FRZLVL section. Indicates an area where multiple freezing levels exist below a specified altitude.
The altitude in feet below which multiple freezing levels exist.
Area definition points bounding the multiple freezing level region.
A multiple freezing level (MULT FRZLVL) boundary within a FRZLVL section. Indicates an area where multiple freezing levels exist below a specified altitude.