The season A rains start in October/November and continue through January affecting the harvest in February. Back to top | West Africa | East Africa | Southern Africa | Subsaharan Africa ITCZ | Cocoa Rwanda's Season B Rains Defined Rainfall in Rwanda is bimodal, that is, there are two rainy seasons.he season A rains start in October/November and continue through January affecting the harvest in February. Back to top | West Africa | East Africa | Southern Africa | Subsaharan Africa ITCZ | Cocoa Rwanda's Season B Rains Defined Rainfall in Rwanda is bimodal, that is, there are two rainy seasons.
King tides occur when the orbits and alignment of the Earth, moon, and sun combine to produce the greatest tidal effects of the year. See a story map from NOAA's Office for Coastal Management and The King Tides Project to learn about sea level rise and tidal flooding. King tides flood Manasquan, New Jersey, 2013.
Ocean tides have 4 causes: 1  The gravitational force difference between the Moon and the Earthâs surface, versus the Moon and Earthâs center of mass. 2  The gravitational force difference between the Sun and the Earthâs surface, versus the Sun and Earthâs center of mass. Centripetal forces on the Earthâs surface, due to itâs orbital motion with respect to the Moon and Sun. The geography of Earth, which amplifies the tides in specific areas (see map below).