What does low pressure relate to in weather?

Answer 1

Low pressure is a counter-clockwise spin (in the northern hemisphere) of rising air. Rising air causes precipitation and therefore you typically find rain with low pressure systems. High pressure systems have sinking air which tends to prevent rain in most cases.

Answer 2

Low pressure (air pressure) can be an indicator of dry calm weather, or it could be an indicator of very stormy (hurricane, tropical depression) weather as a result of updrafts caused by the thermal convection of air currents over warm ocean currents. High pressure systems are usually an indicator of lots of moisture in the air or very cold air moving in over warm air. It all depends on the circulation of air currents, temperatures, and moisture in the air as to whether a zone will be high or low pressure. A front (often a storm front) is a high pressure zone moving into a low pressure zone bringing cold air (cold front) into a warm zone which is moving away from the front; or it could be a warm front bring heavy moist air into a cooler low pressure zone. In either case the low pressure zone was fair weather and the high pressure zone brought stormy weather. In a cyclone warm moist air is actually being drawn up into the circulating heavier air, creating updrafts that reduce the air pressure at the surface, this type of low pressure is preceded by stormy weather and followed by stormy weather even though the "eye" of the storm (if it develops) is relatively calm.

Answer 3

Low Pressure

Low pressure is high altitude.

Answer 4

Low pressure allows clouds to form. Usually it would rain, but there will be clouds around with low pressure. 85% of the time there will be clouds around.

Answer 5

When the pressure is low the air can not hold as much water vapour, so if it is saturated it precipitates out as rain.

Answer 6

Low pressure areas are usually associated with wet weather.