it rains the most in the coast range in oregon.
it rains the most in the coast range in oregon.
where does it rain the most in oregon?
the coast range
there was an excessive amount of precipitation in november 1861 over most of oregon, less so in the extreme northwest. it was cold enough at the higher elevations that much snow fell in the cascade range, which, when later melted by the warm rains produced a great quantity of water that flooded into the willamette river and other streams in the cascades. tributaries of the willamette rising in the oregon coast range did not rise so high. then the depression that came in at the beginning of december produced strong, warm southerly winds in oregon, with extremely heavy rain. the crest of the flood was reached at salem on december 3; at oregon city on the 4th; at milwaukie, between oregon city and portland, on the 5th; at albany on december 8, a second rise at albany greater than the first. the crest at albany and salem were the highest ever known at any time. in oregon, the flood was one of the largest in the history of the willamette valley and the rest of western oregon. flooding was heaviest on rivers with tributaries arising from the snow-covered cascade range.
great flood of 1862
compared to the climate of western oregon, the climate of eastern oregon is a drier continental climate, with much greater seasonal variations in temperature. unlike the willamette valley, eastern oregon receives a significant amount of snow in the winter. some parts of eastern oregon receive fewer than of rain yearly, classifying them as deserts. this desert climate is in part due to a rain shadow effect caused by the cascade range. pine and juniper forests cover 35% of eastern oregon, much in the mountains that include the blue mountains, strawberry mountains, wallowa mountains, trout creek mountains, ochoco mountains, and steens mountain. volcanic basalt flows from the columbia river basalt group covered large sections of eastern oregon 6 to 17 million years ago. other landforms include the alvord desert, owyhee desert, warner valley, deschutes river, owyhee river, grande ronde river, joseph canyon, the honeycombs, and malheur butte.
eastern oregon