There’s a little corner of the United States, the upper left one, that is a conundrum of precipitation. This corner (the Olympic Peninsula) is the part of Washington that looks like it’s being torn away from the mainland. Mount Olympus sits astride this peninsula like the queen that she is, watching the Pacific Ocean to the west, the Salish Sea to the north, and the Sound to the East. She is one of the rainiest places in the entire US, getting about 220 inches of precipitation per year. A few miles west, the town of Forks, WA (of Twilight fame) gets about a hundred inches fewer. Seattle, for comparison, gets an average of 38 inches of rain per year.
Tucked in the midst of all this drizzle, sits the town of Sequim. Pronounced more like a tentacled sea creature than a shiny adornment, Sequim gets a meager 16 inches of rain per year (Los Angeles gets about 15!) The reason for this is a rain shadow.
A rain shadow occurs when a mountain(s) blocks moisture from its leeward side. This is kind of what happens between the western and eastern sides of the Cascade mountain range, making one side a lush, mossy paradise full of magic and wonder, and the other side a hot, dry, dusty wasteland that’s baked or frozen brown three-quarters of the year (but I digress).