Recent heavy rains across the region have already saturated the soil and increased river levels. A very active weather pattern is continuing to send plenty of moisture and mild air our way, and Saturday looks like the best chance of seeing more widespread heavy rains which could lead to flooding.
The way I see it right now is anywhere from 1-3” of rain could fall in the Valleys, with 3-6” of rain at the Coast, Coast Range and the Cascades. The mild nature of the air will lift snow levels to near 9000’ and with recent heavy snowfall, expect plenty of melting snow leading to additional runoff.
The origin of the term Pineapple Express comes from moisture that originates near the Hawaiian Islands and flows all the way to the Western states. It is characterized by very mild and humid air. Some of the Pacific Northwest’s most notable flood events have occurred similar weather set-ups.