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Beaufort number
Description
Speed
0
calm
< 1 km/h | < 1 mph
< 1 knots | < 0.3 m/s
1
light air
1.1-5.5 km/h | 1-3 mph
1-3 knots | 0.3-1.5 m/s
2
light breeze
5.6-11 km/h | 4-7 mph
1-3 knots | 0.3-1.5 m/s
3
gentle breeze
12-19 km/h | 8-12 mph
7-10 knots | 3.5-5.4 m/s
4
moderate breeze
20-28 km/h | 13-17 mph
11-16 knots | 5.5-7.9 m/s
5
fresh breeze
29-38 km/h | 18-24 mph
17-21 knots | 8.0-10.7 m/s
6
strong gale
39-49 km/h | 25-30 mph
22-27 knots | 10.8-13.8 m/s
7
high wind
50-61 km/h | 31-38 mph
28-33 knots | 13.9-17.1 m/s
8
gale
62-74 km/h | 39-46 mph
34-40 knots | 17.2-20.7 m/s
9
strong gale
75-88 km/h | 47-54 mph
41-47 knots | 20.8-24.4 m/s
10
storm
89-102 km/h | 55-63 mph
48-55 knots | 24.5-28.4 m/s
11
violent storm
103-117 km/h | 64-73 mph
56-63 knots | 28.5-32.6 m/s
12
hurricane force
> 118 | > 74 mph
> 64 knots | 32.7 m/s
38 Wind chill factor
Press the INDEX button several times until WIND CHILL is displayed.
Note:
The wind chill factor is based on the common effects of temperature and wind speed.The displayed
wind chill is calculated solely from temperature and wind speed and is measured by the outdoor
sensor.
39 Ice pre-alert
1. When the outdoor temperature hits 3° C (37 ° F), the ice pre-alert symbol
will appear on the
display, flashing continuously.
2. The ice pre-alert symbol
will disappear as soon as the temperature rises above 6° C.
40 Feels like temperature
Press the INDEX button repeatedly until FEELS LIKE appears on the display.
Note:
The feels like temperature indicates the temperature value according to the personal temperature per-
ception.
Summary of Contents for WIFI Weather Center 7in1
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