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Page 23
general, when the pressure increases, the weather improves (sunny to partly cloudy) and when the
pressure decreases, the weather degrades (cloudy to rain).
When the pressure drops rapidly, the storm icon will be displayed.
It may take several days to begin forecasting the weather. In the meantime, the partly cloudy icon will
be displayed.
The weather forecast is an estimation or generalization of weather changes in the next 12 to 48 hours
and varies from location to location. The tendency is simply a tool for projecting weather conditions
and is never to be relied upon as an accurate method to predict the weather.
The “Snowy” weather forecast is based on the outdoor temperature and will be displayed when the
outdoor temperature is below -3°C (26°F).
Figure 22
5.11
Weather Index
The Weather Index displays the parameters Feels Like, Dew Point, Heat Index, and Wind Chill.
In normal mode, press the
INDEX
button on the front of the display to view the following parameter
in this sequence:
FEELS LIKE → DEW POINT → HEAT INDEX → WIND CHILL → FEELS LIKE
5.12
Feels Like
Feels like is a combination of Wind Chill and Heat Index.
For temperatures less than 18 °C (64 °F), wind chill is displayed.
For temperatures greater than 26 °C (79 °F), heat index is displayed.
Between 18 °C and 26 °C, the outdoor temperature is shown.
Figure 23
Note
: The National Weather Service defines the maximum wind chill temperature of 40° F and a
minimum heat index temperature of 80°F. We extend this range from 64 °F to 79 °F to make it more
interesting to the end user by curve fitting the national weather service’s tables.
