Flood Watch Issued for Western Washington as 'Pineapple Express' Moves In

Steady rainfall is expected throughout Western Washington this week.

A wet weather pattern is expected to bring steady rainfall to Renton and the rest of the Puget Sound region this week.

The forecast has prompted the National Weather Service to issue a flood watch for several areas, with Renton's Cedar River on the periphery. The Renton forecast calls for rain the rest of the week, with high temperatures reaching the upper 50s Wednesday and Thursday.

Often referred to as a "Pineapple Express," this type of local weather pattern originates in Hawaii and brings uncommonly warm temperatures—along with plenty of rainfall. 

In the Olympics and North Cascades, the warm air will cause freezing levels to rise to 6,000 feet and bring 4 to 7 inches of rain. Lighter rainfall is expected through at least Wednesday in the Puget Sound lowlands and other parts of the Cascades.

"For the middle of March, this will be a notable event, worthy of a proper name," UW professor Cliff Mass writes somewhat tongue-in-cheek on his weather blog, dubbing the storm "Poseidon."

Do you typically see flooding in your neighborhood during weather like this? Let us know in the comments. You can upload weather photos or video to our Pics and Clips gallery any time.


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