Beaufort number
< 1 km/h
< 1 mph
< 1 knot
< 0.3 m/s
1.1–5.5 km/h
1–3 mph
1–3 knot
0.3–1.5 m/s
5.6–11 km/h
4–7 mph
4–6 knot
1.6–3.4 m/s
12–19 km/h
8–12 mph
7–10 knot
3.5–5.4 m/s
20–28 km/h
13–17 mph
11–16 knot
5.5–7.9 m/s
29–38 km/h
18–24 mph
17–21 knot
8.0–10.7 m/s
39–49 km/h
25–30 mph
22–27 knot
10.8–13.8 m/s
50–61 km/h
31–38 mph
28–33 knot
13.9–17.1 m/s
62–74 km/h
39–46 mph
34–40 knot
17.2–20.7 m/s
75–88 km/h
47–54 mph
41–47 knot
20.8–24.4 m/s
89–102 km/h
55–63 mph
48–55 knot
24.5–28.4 m/s
103–117 km/h
64–73 mph
56–63 knot
28.5–32.6 m/s
≥ 118 km/h
≥ 74 mph
≥ 64 knot
≥ 32.7m/s
Wind speed
Calm
Light air
Smoke drift indicates wind direction.
Leaves and wind vanes are stationary.
Wind felt on exposed skin. Leaves
rustle. Wind vanes begin to move.
Leaves and small twigs constantly
moving, light flags extended.
Dust and loose paper raised. Small
branches begin to move.
Branches of a moderate size move.
Small trees in leaf begin to sway.
Large branches in motion. Whistling heard
in overhead wires. Umbrella use becomes
difficult. Empty plastic bins tip over.
Whole trees in motion. Effort needed
to walk against the wind.
Some twigs broken from trees. Cars
veer on road. Progress on foot is
seriously impeded.
Some branches break off trees, and
some small trees blow over. Construction
/temporary signs and barricades blow over.
Trees are broken off or uprooted, structural
damage likely.
Widespread vegetation and structural
damage likely.
Severe widespread damage to vegetation
and structures. Debris and unsecured
objects are hurled about.
Description
Calm. Smoke rises vertically.
Land conditions
Light breeze
Gentle breeze
Moderate breeze
Fresh breeze
Strong breeze
High wind
Gale
Strong gale
Storm
Violent storm
Hurricane force
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BEAUFORT SCALE
Beaufort scale is an international scale of wind velocities from 0 (calm) to 12 (Hurricane force).
12
Wind Direction Indicator
Meaning
Real-time wind direction
Wind directions appeared
in last 5 minutes (max 6)
LIGHT MODERATE
STRONG STORM
2-8 mph
3-13 km/h
9-25 mph
14-41 km/h
26-54 mph
42-87 km/h
≥ 55 mph
≥ 88 km/h
Level
Speed
Rainfall rate Daily rainfall Weekly rainfall Monthly rainfall
RAINFALL
To select the rainfall display mode:
The device displays how many mm / inches of rain are accumulated in a one hour time period, based on
current rainfall rate.
Press [RAINFALL] button to toggle between:
• RATE Current rainfall rate in past an hour
•
DAILY The DAILY display indicate the total rainfall from midnight
•
WEEKLY The WEEKLY display indicate the total rainfall from the current week
•
MONTHLY The MONTHLY display indicate the total rainfall from the current calendar month
Note: Rain rate is updated every 6 minutes, at every hour on the hour, and at 6, 12, 18, 24, 30, 36, 42, 48, 54
minute past the hour.
To select the measurement unit for the rainfall:
1. Press and hold [RAINFALL] button 2 seconds to enter unit setting mode.
2. Use [UP] / [DOWN] button to toggle between mm (millimeter) and in (inch).
3. Press [RAINFALL] button
to confirm and exit.
WIND SPEED / DIRECTION
To read the wind direction:
To select the wind display mode:
Press [WIND] button to toggle between:
•
AVERAGE The AVERAGE wind speed will display the average of all wind speed numbers recorded in
the previous 30 seconds
•
GUST The GUST wind speed will display the highest wind speed recorded from last reading
The wind level provides a quick reference on the wind condition and is indicated by a series of text icons:
To select wind speed unit:
1. Press and hold [WIND] button for 2 seconds to enter unit setting mode.
2. Use the [UP] / [DOWN] button to change the unit between mph (miles per hour) / m/s (meter per
second) / km/h (kilometer per hour) / knots.
3. Press [WIND] button to confirm and exit.
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