La Crosse Technology WS-2317 Operation Manual page 20

- Outdoor dew point
- Rainfall 24h
- Rainfall 1h
- Rainfall total.
Notes to Dewpoint and Windchill:
Air can at a certain temperature only carry a certain amount of
water (water vapor), which also increases and decreases with
temperature. If the air temperature decreases below the dew
point (saturation point), the excessive water vapor will
condense and fall out in form of dew, fog or rain. At a
temperature of e.g. 59°F and a relative humidity of 50% the
dewpoint will be about 41°F, at 80% humidity about 53.6°F. At
a relative humidity of 100% saturation is reached, i.e. the
dewpoint is 59°F. At a dewpoint below freezing the fallout will
become frost or snow.
Windchill has been introduced for battle planning during World
War II. It represents not the real measured but the
temperature a person feels in open area under the influence
of wind and cold. Windchill is laid out in tables for various
temperatures and wind speeds. At an outdoor temperature of
e.g. 46.4°F and calm winds a person moving at a speed of 13
mph will already feel a windchill temperature of 32°F.
Wind Data (LCD Section 3)
The current wind direction will be displayed on the LCD
compass on the wind section. Press the WIND key to toggle
between wind direction as numerical (e.g. 225°) and
abbreviated characters (e.g. SW) as well as numerical wind
speed display inside the compass circle.
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