PORTLAND, Oregon — Under a mainly clear sky, temperatures are running about ten degrees cooler now compared to 24 hours ago.
With a cool, dry air mass in place, light winds and the longer nights of September, we’ll see low temperatures drop in to the 30s in parts of the western valleys. There may be a few areas of frost.
Portland will drop into the mid-40s, and afternoon highs will make the mid-70s Thursday under a mainly clear sky.
Clouds roll in late Thursday night. But the rain should hold off until Friday night. Looks for highs in the 70s again Friday, with clouds and winds picking up from the south.
Rain late Friday night into Saturday morning will become heavy. After the cold front passes through Saturday morning, rain turns to showers with possible thunderstorms. Showers will be frequent and heavy Saturday and Sunday. Highs will be in the 60s and there will be new snow on Mt Hood above 6,000 feet.
Look for a return to mainly sunny and warm weather Monday and Tuesday. Showers may return around the middle of next week.
Have a great Thursday.
Take good care of each other.
KGW Chief Meteorologist