Northern Middle Latitudes
This is the peak Winter period when large intense
Cold front/cyclones can centre between 30° and 40° north within
the persistent westerlies. The Anti-cyclone centres near the edge of
the tropics and the occasional Warm cyclone can persist within the weak
easterlies over warm poleward currents. North and west facing
coastlines receive large swell from Cold front/cyclone activity while
north and east facing coastlines can receive refracted swell and/or
swell from the Cold cyclones north east fetch. North, south and east
facing coastlines occasionally receive large swell from Warm cyclones
while south facing coastlines can occasionally receive long range swell
from Hot cyclone activity in the southern tropics.
Northern Tropics
The peak dry season continues along with light
east to north easterlies. North and east facing coastlines occasionally
receive swell from Cold/Warm cyclone activity in northern middle
latitudes, while north and west facing coastlines receive swell from
Cold front/cyclone activity in the north. South and east facing
coastlines can receive swell from Hot cyclone activity in the southern
tropics.
Southern Tropics
The peak wet season continues along with
Monsoons, troughs/Hot cyclones which occur within the persistent east
to south easterlies. North, south and east facing coastlines can
receive large swell from this activity while south and west facing
coastlines occasionally receive swell from Cold front/cyclone activity
in the south. North facing coastlines occasionally receive long range
swell from Cold/Warm cyclone activity in the northern middle latitudes.
Southern Middle Latitudes
This is the peak Summer period when trough/Hot
cyclones continue to swing poleward from the southern tropics while
variable easterly winds prevail. The Anti-cyclone centres near 50°
south while Cold front/cyclones begin their slow equatorward migration
in the westerlies at about 60° south. North, south and east facing
coastlines receive swell from trough/Hot cyclone activity while south
and west facing coastlines occasionally receive swell from Cold
front/cyclone activity in the south. North facing coastlines
occasionally receive long range swell from Cold/Warm cyclone activity
in northern middle latitudes.
