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Pressure History box, where the unit has been recording in Sleep
Mode for several hours. Air pressure peaked 11 hours ago, and has
been steadily dropping for the last 10 hours. The prediction is rain.
The unit has recorded 23 hourly readings, with the minimum pressure
at 981 millibars, the maximum at 989 mb and the average at 986 mb.
When the unit is first turned on, the Weather Symbol box is blank be-
cause there is no history — no trend has been established. When three
hourly readings are recorded, the Expedition interprets the data and
displays one of five weather symbols in the Weather Symbol box. This
symbol reflects the current trend shown in the Pressure History bar
chart. By monitoring the trend (steady, rising or falling), the iFINDER
can predict how the weather will likely behave.
Weather Symbol box, showing Rain symbol.
The following weather symbols are based only on the last 3 hours of data:
Sun symbol: indicates an unstable high pressure trend.
Barometer is typically rising very quickly. Predicts a rapidly
increasing chance of clear or clearing skies.
Partly Cloudy symbol: indicates a stable high pressure trend.
Barometer is typically rising. Predicts an increasing chance of
partly cloudy to clearing skies.
Cloudy symbol: indicates a stable mid-range pressure trend.
Barometer is typically steady. Predicts a stable weather pattern,
which could be either overcast or sunny.
Reading
23 hours ago
Current air
pressure
Pressure
of selected
hour
Reading 6 hours
ago, selected by
left arrow key
Current
reading