Mystery milky rain falls on Washington, Oregon

Mystery milky rain falls on Washington, Oregon (USA Today, Feb 7, 2015):

SPOKANE, Wash. — Rainfall described as milky-colored, dusty or dirty fell across parts of Washington, Oregon and Idaho, with its origin is unclear.

The National Weather Service received reports of the dirty rain from more than 15 cities from Hermiston, Ore., to Rathdrum, Idaho, on Friday. The weather service’s Spokane office collected water samples that will be sent to a lab for testing.

The light gray dirt in the rainfall coated vehicles and windows across the region as a rainstorm that originated in the Pacific moved in.

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