In summer, southern Asia develops a strong low-pressure center, into which winds from the adjacent oceans blow.

Two strong low-pressure centers developed along a stationary front that stretched along this line.

Will those two low-pressure centers collide to produce blizzard conditions in southern New England?

By the following day, a low-pressure centre had developed along an occlusion between two of the fronts.

Wind speeds start to increase as more air is sucked into the low-pressure centre.

It developed a weak low-pressure center at sea level, which passed directly over Trinidad on September 11.

The low quickly became organised, with deep convection developing over the low-pressure centre.

This was an unusual setup for a significant tornado, associated with a warm front near a low-pressure center.

Extratropical cyclones can also be dangerous when their low-pressure centers cause powerful winds and high seas.

More occasionally, very warm unstable air is present around fronts and low-pressure centers.