10. Appendix

Dewpoint - Temperature point that is independent of the interaction between a specific air pressure level, a specific temperature and a certain level of humidity. The humidity in the air starts to condense at this point, the so-called dew; the humidity condenses and precipitates as liquid (mist, vapor). If the dewpoint for water vapor is below 32 °F (0 ˚C), then there is condensation in the form of snow or hoar frost.

Weather forecast - Forecast about weather symbols calculated from the increasing or decreasing speed of air pressure (trend).

These changes in the air pressure speed is the most decisive dimension for the forthcoming weather; the absolute value has a lesser role to play. One can gener- ally say that the increasing air pressure would mean better weather and falling air pressure would then be a sign of bad weather.

Windchill-Equivalent-Temperature- A fictional temperature that is felt by human beings under certain conditions instead of the measured temperature and which can be taken into account during low temperatures (for e.g. under 44 °F) to find out how one would feel at certain temperatures, wind velocities and correspond- ing clothing. These conditions are a temperature below 91.4 °F (33 ˚C) and a wind velocity above 5.8 mph (2.6 m/s). Windchill is defined as the cooling effect of the naked skin at assumed constant 91.4 °F (33 ˚C) skin surface temperature.

The higher the wind velocity and the lower the actual temperature, the stronger is then the windchill effect.

The "felt" temperature is an approximation that can be compared to the so-called feeling about the temperature and is taken into account along with the effect of the emission effects of the sun, light reflection of the clouds, the light wave length, etc.

Wind strength table (Beaufort)

Beaufort

Wind velocity km/h

Wind velocity mph

Description

0

0 - 0.7 km/h

0 - 0.4 mph

calm

1

0.7 - 5.4 km/h

0.5

- 3.6 mph

light air

2

5.5 - 11.9 km/h

3.7

- 7.4 mph

light breeze

3

12.0

- 19.4 km/h

7.5

- 12.1 mph

gentle breeze

4

19.5

- 28.5 km/h

12.2 - 17.7 mph

moderate breeze

5

28.6

- 38.7 km/h

17.8 - 24.0 mph

resh breeze

6

38.8

- 49.8 km/h

24.1 - 30.9 mph

strong breeze

7

49.9

- 61.7 km/h

31.0 - 38.3 mph

near gale

8

61.8

- 74.6 km/h

38.4 - 46.4 mph

gale

9

74.7

- 88.9 km/h

46.5 - 55.2 mph

strong gale

10

89.0

- 102.4 km/h

55.3 - 63.6 mph

storm

11

102.5 - 117.4 km/h

63.7 - 72.9 mph

violent storm

12

> 117.4 km/h

> 72.9 mph

hurricane

39

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La Crosse Technology WS 550 US operating instructions Appendix
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WS 550 US specifications

The La Crosse Technology WS 550 US is an advanced weather station designed for both amateur meteorologists and weather enthusiasts. It seamlessly combines cutting-edge technology with user-friendly features, capturing comprehensive meteorological data for intuitive analysis and real-time monitoring.

At the heart of the WS 550 US is its wireless sensor technology. This weather station includes an outdoor sensor that accurately measures temperature, humidity, wind speed, wind direction, and rainfall. The wireless connection allows for a convenient setup, as users can place the sensor up to 300 feet away from the display console. This flexibility ensures optimal placement for accurate readings while maintaining easy access to the display.

One of the standout features of the WS 550 US is its large, easy-to-read LCD screen, which displays a wealth of information at a glance. The console shows indoor and outdoor temperatures, humidity levels, wind speeds, and weather forecasts based on barometric pressure changes. The multi-functional display provides a clear summary of current conditions, making it easier for users to prepare for changing weather patterns.

In addition to real-time data, the WS 550 US also boasts a unique alarm system for severe weather conditions. Users can set up personalized alerts for high and low temperature thresholds, humidity levels, and rainfall amounts. This proactive feature gives users peace of mind, allowing them to respond to potential weather hazards quickly.

The WS 550 US integrates advanced forecasting technology, utilizing a built-in barometer to predict weather changes up to 12-24 hours in advance. The included historical data feature allows users to review past weather patterns, granting insights into local climatic trends and forecasting.

Another admirable aspect of this weather station is its compatibility with La Crosse's mobile app, enabling users to access their weather data remotely. This feature is particularly appealing in today’s digital age, making monitoring weather conditions possible from smartphones and tablets.

With its combination of advanced technology and user-oriented features, the La Crosse Technology WS 550 US provides reliable and accurate weather data, appealing to anyone interested in understanding the elements that shape our environment. Whether preparing for a gardening project, planning outdoor activities, or simply staying informed, this weather station stands out as a versatile tool in any setting.
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