Home Science An anomalous atmospheric river has hit the northeast Pacific Ocean

An anomalous atmospheric river has hit the northeast Pacific Ocean

by Alicia Cronin

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Narrow streams of water vapor, called “rivers in the sky,” can extend thousands of kilometers and bring significant precipitation.

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In late September, the atmosphere produced a particularly powerful river that brought heavy rainfall to coastal areas of Canada and southeast Alaska. One city in British Columbia received up to 99.3 millimeters of rain in four days – nearly a month’s worth of rainfall.

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