La Crosse WS9251 Instruction Manual - page 10
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TO EXIT SETTING MODES
To exit the setting modes anytime, user can wait for automatic timeout to return to normal display.
WEATHER FORECASTING ICONS
Weather icons can be displayed in any of the following combinations:
For every sudden or significant change in the air pressure, the weather icons will update accordingly to
represent the change in weather. If the icons do not change, then it means either the air pressure has
not changed or the change has been too slow for the Weather station to register. However, if the icon
displayed is a sun or raining cloud, there will be no change of icon if the weather gets any better (with
sunny icon) or worse (with rainy icon) since the icons are already at their extremes.
The icons displayed forecasts the weather in terms of getting better or worse and not necessarily sunny
or rainy as each icon indicates. For example, if the current weather is cloudy and the rainy icon is
displayed, it does not mean that the product is faulty because it is not raining. It simply means that the
air pressure has dropped and the weather is expected to get worse but not necessarily rainy.
Note:
After setting up, readings for weather forecasts should be disregarded for the next 12-24 hours. This will
allow sufficient time for the weather station to collect air pressure data at a constant altitude and
therefore result in a more accurate forecast.
Common to weather forecasting, absolute accuracy cannot be guaranteed. The weather forecasting
feature is estimated to have an accuracy level of about 75% due to the varying areas the weather station
has been designed for use. In areas that experience sudden changes in weather (for example from
sunny to rain), the weather station will be more accurate compared to use in areas where the weather is
stagnant most of the time (for example mostly sunny).
If the weather station is moved to another location significantly higher or lower than its initial standing
point (for example from the ground floor to the upper floors of a house), discard the weather forecast for
the next 12-24 hours. By doing this, the weather station will not mistake the new location as being a
possible change in air-pressure when really it is due to the slight change of altitude.
WEATHER TENDENCY INDICATOR
Working together with the weather icons is the weather tendency indicator (located on the left of the
weather icons). When the arrow points upwards, it means that the air pressure is increasing and the
weather is expected to improve, but when arrow points downwards, the air pressure is dropping and the
weather is expected to become worse.
Taking this into account, one can see how the weather has changed and is expected to change. For
example, if the indicator is pointing downwards together with cloud and sun icons, then the last
Sun
Sun with cloud
Cloud with
rain