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Cooling off Thursday, showers set in late in the day

KGW weather team. Updated several times daily, this includes the outlook around Oregon and in Southwest Washington.

PORTLAND, Oregon — Portland and most of the western valleys pushed into the low 80s Wednesday, for the fourth time this year. Our average date to for our first 80-degree day is May 10. 

Clouds have been increasing ahead of a weather system that will bring cooler air and an increasing chance of showers Thursday.

Highs will top out in the upper 60s Thursday. The most likely time for rain to fall will be in the later afternoon and evening hours.

There is a slight chance of thunderstorms at the coast.

Showers continue Friday, and the coolest part of this system arrives at the same time. Highs will only make the upper 50s Friday.

But a warm-up begins over the weekend. Highs are back in the low 60s Saturday under a partly sunny sky.

A few scattered showers develop Sunday, but they should be confined to areas in and near the Cascades and Coast Range. Still, I can’t rule out a sprinkle for Mom’s on Mother’s Day.

Mostly sunny and warmer weather returns early next week, as highs climb back into the 70s.

Stay safe and take good care of each other.

Matt Zaffino
KGW Chief Meteorologist

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