Raymarine a67, Installation And Operation Instructions Manual, Page: 253 / 330

NOWRad precipitation color codes
NOWRad displays the type and level of precipitation:
Color code Precipitation type Reflectivity Intensity
Light green Rain (15 to 19 dBz)
Medium green Rain
(20 to 29 dBz)
Dark Green Rain (30 to 39 dBz)
Yellow Rain (40 to 44 dBz)
Orange Rain (45 to 49 dBz)
Light red Rain (50 to 54 dBz)
Dark red Rain (55+ dBz)
Light blue Snow (5 to 19 dBz)
Dark blue
Snow (20+ dBz)
Light pink Mixed (5 to 19 dBz)
Dark pink Mixed (20+ dBz)
Canadian radar precipitation color codes
Canadian radar shows the intensity of precipitation for
Canada. Unlike NOWRad, Canadian radar does not show the
precipitation type.
Color code Intensity in mm per hour
Transparent (nothing shown at very
low precipitation) 0.00 to 0.20 mm/hr
Light green 0.21 to 1.00 mm/hr
Medium green 1.01 to 4.00 mm/hr
Dark green 4.01 to 12.00 mm/hr
Yellow
12.01 to 24.00 mm/hr
Orange 24.01 to 50.00 mm/hr
Light red 50.01 to 100 mm/hr
Dark red 100.01+ mm/hr
Reflectivity intensity to rainfall correlation
You can use the table below to correlate reflectivity intensity in
dBz to estimated rainfall in millimeters per hour or inches per
hour.
Reflectivity Intensity Rainfall (mm/hr) Rainfall (in/hr)
5
0.0749 0.0029
10 0.1538 0.0059
15 0.3158 0.0123
20 0.6484 0.0253
25 1.332 0.0519
30 2.734 0.1066
35 5.615 0.219
40 11.53 0.4497
45 23.68 0.9235
50 48.62 1.8963
55 99.85 3.8949
60 205.05 7.9975
65 401.07 15.6424
70 864.68 33.723
75 1775.65 69.252
80 3646.33 142.21
Reflectivity Intensity Rainfall (mm/hr) Rainfall (in/hr)
85 7487.83 292.03
90 15376.51 599.69
95 31575.91 1231.46
100 64841.98 2528.84
105 133154.6 5193.03
110 273436.4 10664.02
Selecting weather graphics
From the weather application:
1. Select Menu .
2. Select Display Graphics .
The display graphics list is displayed.
3. Select each graphic you want to Show or Hide.
4. Selecting a graphic will switch between Show or Hide.
Note: The Wind Vector graphic options are Arrow or Barb.
Weather application (North America only)
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