A rarely seen cloud formation was spotted Tuesday over parts of Skagit County as the region braced for several days of rain and snow.

Courtney Obergfell, a meteorologist at the National Weather Service’s Seattle office, said the ominous clouds are called mammatus and occur when cold air sinks, forming pouches beneath more common clouds, often those bearing rain.


— Reporter Kimberly Cauvel: 360-416-2199, kcauvel@skagitpublishing.com, Twitter: @Kimberly_SVH, Facebook.com/bykimberlycauvel

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