Friday/ the river in the sky

It has been a soggy week.
The rain gauge at Sea-Tac airport has already logged more than 5 inches of rain for the month of November.
There is a 12-hour break in the rain right now, but more on the way for Saturday, Sunday and Monday.
Most of the rivers here are under a flood watch until Tuesday afternoon.

A plot of precipitable water* from overnight. (It’s a classic ‘Pineapple Express’:  moisture builds up in the tropical Pacific around Hawaii (on the left, middle of the picture), and then stream towards, and wallop the Pacific Northwest).
*Precipitable water is the depth of water in a column of the atmosphere, available for precipitation. Tropical air masses hold a lot of PW.
[Text and graph posted by National Weather Service Seattle @NWSSeattle on Twitter]

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