Conrad Electronic WS888 Bedienungsanleitung Seite 111

Dew point
Temperature point that depends on the coincidence of a certain barometric pressure, a certain temperature and air
humidity
At this temperature the air humidity starts to condense, the so-called dewing; the air humidity condenses in liquid form
(fog, vapour). If the dew point for water vapour is below 0 °C, the water will condense as snow or hoarfrost.
Weather forecast
Forecast via weather symbols calculated based on the change of speed with which the barometric pressure rises or
falls (trend).
This change of speed of the barometric pressure is the decisive variable for forecasting the future weather; the
absolute value plays a subordinate role in this context. As a rule of thumb it can be said that rising barometric pressure
indicates better weather and falling pressure signals worse weather.
Windchill (felt temperature)
The windchill temperature is a fictional temperature which humans actually feel instead of the measured temperature
under certain conditions. At low temperatures (e.g. under 7 °C), the windchill factor can be used to determine how
comfortable we will feel at certain temperatures or wind speeds when wearing appropriate clothing.
These conditions are a temperature of 33 °C and a wind speed of over 2.6 m/s.
Windchill is defined as the cooldown effect of unclothed skin assuming a constant skin surface temperature of 33 °C.
The higher the wind speed and the lower the real temperature, the more we feel the windchill effect. The windchill
temperature is comparable to the felt temperature that additionally takes into account the sunlight, the light reflection
of the clouds, the light wavelengths etc.
Beaufort wind scale
Beaufort Wind velocity
0 0 - 0.7 km/h
1 0.7 -5.4 km/h
2 5.5 -11.9 km/h
3 12.0 -19.4 km/h
4 19.5 -28.5 km/h
5 28.6 -38.7 km/h
6 38.8 -49.8 km/h
7 49.9 -61.7 km/h
8 61.8 -74.6 km/h
9 74.7 -88.9 km/h
10 89.0 -102.4 km/h
11 102.5 -117.4 km/h
12 > 117.4 km/h
Description
Calm
Light air
Light breeze
Gentle breeze
Moderate breeze
Fresh breeze
Strong breeze
Near gale
Gale
Severe gale
Storm
Violent storm
Hurricane
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