#low-pressure_area
Low-pressure area
Area with air pressures lower than adjacent areas
In meteorology, a low-pressure area, low area or low is a region where the atmospheric pressure is lower than that of surrounding locations. Low-pressure areas are commonly associated with inclement weather, while high-pressure areas are associated with lighter winds and clear skies. Winds circle anti-clockwise around lows in the northern hemisphere, and clockwise in the southern hemisphere, due to opposing Coriolis forces. Low-pressure systems form under areas of wind divergence that occur in the upper levels of the atmosphere (aloft). The formation process of a low-pressure area is known as cyclogenesis. In meteorology, atmospheric divergence aloft occurs in two kinds of places:The first is in the area on the east side of upper troughs, which form half of a Rossby wave within the Westerlies. A second is an area where wind divergence aloft occurs ahead of embedded shortwave troughs, which are of smaller wavelength.
Wed 11th
Provided by Wikipedia
This keyword could refer to multiple things. Here are some suggestions: