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At what time of the year are the paths of North Atlantic lows moving from west to east generally at their most southerly position?
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Refer to figure.

The polar front is the junction between the Ferrell (tropical air mass) and Polar cells (polar air mass). At this low-pressure zone, relatively warm, moist air of the Ferrel Cell runs into relatively cold, dry air of the Polar cell.
In the Northern hemisphere: Warm air mass (Tropical airmass) => South; Cold air mass (Polar air mass) => North
In the northern hemisphere, the position of the polar front is affected by the seasons:

  • During winter it typically moves to lower latitudes (further south).
  • During summer it is situated further north, closer to the poles.
In the southern hemisphere, the polar front remains almost constant regardless of the season (50ºS).

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