Weather forecast for Portland, Oregon for Friday, October 21, 2022

Details for Friday, October 21

PORTLAND, Ore. (KOIN) – This is the day we’ve all been waiting for. There are so many hopes and dreams clinging to these little gems from heaven.

So, when will the rain make an appearance? Friday morning is our transition from hopeless mist to clouds to rain. If you feel something falling on your head, it’s not a passing bird, it’s RAIN! This should happen between 10 a.m. and 1 p.m. for Portland.

And with that cold front comes a stronger ground flow. This will help further eliminate lingering smoke.

In fact on Thursday, for the first time in 3 days, Portland’s air quality finally emerged from unhealthy for everyone Category. A word of warning, however. An air quality advisory will remain in effect until Monday. Even with a good dose of rain, the fires will likely smolder, affecting nearby communities.

The highest rainfall totals are expected over southwest Washington and Portland. The totals could range from 0.80″ to 1″ on Friday. The heaviest periods of rain will be Friday afternoon and late at night.

When the cold air arrives, three things are possible: high temperatures in the 50s, thunderstorms on Saturday and snow in the mountains.

Mountain passes may briefly experience snow accumulations under the heaviest snow showers. But we’re coming into this pretty hot period, so I wouldn’t expect any lasting impacts on passing. I would look at Willamette Pass and Santiam Pass. Sunday promises to be rather dry. Then we are back to rain for most of next week.

Scroll through the charts below for a preview of this weekend’s predictions.

Dale D. Schrum