Wind Chill - Ambient Weather FALCON WS-8480 User Manual

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5.1.18 Wind Chill

Wind Chill is the perceived decrease in air temperature felt by the body on exposed skin due to the
flow of air, and is calculated based on temperature and wind speed.
Wind chill numbers are always lower than the air temperature for values where the formula is valid.
Version 1.2 ©Copyright 2019, Ambient LLC. All Rights Reserved.
Fresh breeze
Strong breeze
High wind
Gale
Strong gale
Storm
Violent storm
Hurricane force
Figure 29
13 - 17 mph raised. Small branches
begin to move.
11 - 16 knot
5.5 - 7.9 m/s
29 - 38 km/h Branches of a moderate
size move.
18 - 24 mph
Small trees in leaf
17 - 21 knot
begin to sway.
8.0 - 10.7 m/s
39 - 49 km/h Large branches in
motion. Whistling
25 - 30 mph
heard in overhead
22 - 27 knot
wires. Umbrella use
10.8 - 13.8 m/s
becomes difficult.
Empty plastic bins tip
over.
50 - 61 km/h Whole trees in motion.
Effort needed to walk
31 - 38 mph
against the wind.
28 - 33 knot
13.9 - 17.1 m/s
62 - 74 km/h Some twigs broken
from trees.
39 - 46 mph
Cars veer on road.
34 - 40 knot
Progress on foot is
17.2 - 20.7 m/s
seriously impeded
75 - 88 km/h Some branches break
off trees, and some
small trees blow over.
47 - 54 mph
Construction
41 - 47 knot
/temporary signs and
20.8 - 24.4 m/s
barricades blow over.
89 - 102 km/h Trees are broken off or
uprooted, structural
55 - 63 mph
damage likely.
48 - 55 knot
24.5 - 28.4 m/s
103 - 117 km/h Widespread vegetation
and structural damage
64 - 73 mph
likely.
56 - 63 knot
28.5 - 32.6 m/s
≥ 118 km/h Severe widespread
damage to vegetation
≥ 74 mph
and structures. Debris
≥ 64 knot
and unsecured objects
≥ 32.7m/s
are hurled about.
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