Raymarine C140w User Reference Handbook page 184

NOWRad precipitation color codes
NOWRad displays the type and level of precipitation:
Color code Precipitation type
Light green Rain
Medium green Rain
Rain
Dark Green
Yellow Rain
Orange Rain
Light red Rain
Dark red Rain
Light blue Snow
Dark blue Snow
Light pink Mixed
Dark pink Mixed
Canadian radar precipitation color codes
Canadian radar shows the intensity of precipitation for Canada.
Unlike NOWRad, Canadian radar does not show the precipitation
type.
184
Color code
Transparent (nothing shown at very
low precipitation)
Light green
Medium green
Intensity
Dark green
(15 to 19 dBz)
Yellow
(20 to 29 dBz)
Orange
(30 to 39 dBz)
Light red
(40 to 44 dBz)
Dark red
(45 to 49 dBz)
(50 to 54 dBz)
(55+ dBz)
(5 to 19 dBz)
(20+ dBz)
(5 to 19 dBz)
(20+ dBz)
Intensity in mm per hour
0.00 to 0.20 mm/hr
0.21 to 1.00 mm/hr
1.01 to 4.00 mm/hr
4.01 to 12.00 mm/hr
12.01 to 24.00 mm/hr
24.01 to 50.00 mm/hr
50.01 to 100 mm/hr
100.01+ mm/hr
C-Series Widescreen user reference