I noticed that in the PNW in USA and Canada, the rainy season is in the winter whereas the summers are relatively dry. However, move a bit inland to the interior of Washington/BC, and the rainy season becomes summer whereas the winters are fairly dry.
What causes the flip?
In: Earth Science
Rocky mountains changing prevailing wind patterns and temperature swings. For most of the interior more water gets dumped into the atmosphere when it’s hot and thus it rains more then. In the PNW the heat actually dries everything out as the wind blows all the moisture back out to the ocean. In the winter the more moisture can make it inland to create the steady drizzle that is common in the winter.
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