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Spring Precipitation Trends

By Climate Central 

A warmer atmosphere can hold more water vapor, which means there’s more to come down in rainstorms. That’s consistent with the fact that heavy downpours have been on the rise in every region of the lower 48 since the late 1950s.

Average precipitation during meteorological spring hasn't changed much since 1970. The contiguous states have seen a scant 0.03 inches less precipitation per decade — hardly a significant trend.

Regional patterns, however, tell a different story. In the Southeast, the decline in precipitation has been as much as a half an inch per decade. By contrast, there’s been more rain in the Pacific Northwest, especially in the western parts of Washington and Oregon, where some climate divisions have increased as much as 0.33 inches per decade.

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