i was looking something up about weather and i found this "One particularly wet pattern, known as the Pineapple Express, occurs when a
deepening trough of low pressure offshore causes the frontal system to stall over the
South Coast. Eventually, moist, tropical air is picked up by the upper winds from near
the tropics and carried northeastward onto the BC coast. The result is extremely
heavy precipitation events where local rainfall amounts of 100 millimetres or more
can occur..
Photo 4-"