It means that the oil pressure switch is showing low pressure.
Decreasing pressure indicates stormy weather. Increasing Pressure indicates better weather.
Decreasing pressure indicates a change in weather
answers Decreasing pressure indicates a change in weather.
In general high pressure indicates good weather and low pressure indicates storms.
Pressure, on it's own, does not indicate any particular weather. It is the changes in air pressure, along with other factors such as humidity etc which indicates the proposed weather changes.
Decreasing pressure
Rising pressure indicates clear weather (most of the time).
In general high pressure indicates good weather and low pressure indicates storms.
A high on a weather map indicates a high pressure area. This indicates a new weather front is moving into that area.
A drop in atmospheric pressure.
A millibar is a unit of measuring pressure. Air pressure is one of the basic things you can measure in weather. High pressure (over 1013 millibars at sea level) usually indicates calm, clear weather while low pressure usually indicates stormy weather.
A falling pressure on the barometer indicates bad weather approaching, especially if falling rapidly