Raymarine e7 User Reference page 236

Color code
Light red
Dark red
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)
5 0.0749
10 0.1538
15 0.3158
20 0.6484
25 1.332
30 2.734
35 5.615
40 11.53
45 23.68
50 48.62
55 99.85
60 205.05
65 401.07
70 864.68
75 1775.65
236
Intensity in mm per hour
50.01 to 100 mm/hr
100.01+ mm/hr
Rainfall (in/hr)
0.0029
0.0059
0.0123
0.0253
0.0519
0.1066
0.219
0.4497
0.9235
1.8963
3.8949
7.9975
15.6424
33.723
69.252
Reflectivity Intensity Rainfall (mm/hr)
80 3646.33
85 7487.83
90 15376.51
95 31575.91
100 64841.98
105 133154.6
110 273436.4
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.
Rainfall (in/hr)
142.21
292.03
599.69
1231.46
2528.84
5193.03
10664.02
e7 / e7D — User reference