mgrib(grib_field_position = 1,
grib_input_file_name = "2m_temperature.grib")
mcont(contour_level_selection_type = "interval",
contour_shade_colour_method = "list",
contour_shade_method = "area_fill",
contour_shade = "on",
contour_shade_max_level = 56.00,
contour_hilo = "off",
contour = "off",
contour_line_thickness = 3,
contour_label = "off",
contour_shade_colour_list = ["rgb(0,0,0.5)", "rgb(0,0,0.5)",...,"magenta", "magenta"],
contour_shade_min_level = -48.00,
contour_interval = 4.00,
legend = "on")