PORTLAND, Ore. (KOIN) — Heat, haze, humidity and the chance of thunderstorms will make it feel like the middle of summer in Portland on Wednesday.
A sun and cloud mix will help warm temperatures into the mid-80s on Wednesday as higher humidity values make it feel more like the 90s. Dew point temperatures are expected to be near 70 degrees on Wednesday, adding atmospheric instability and more available energy for thunderstorms to develop.
Southern Oregon thunderstorms have the potential to move northwest on Wednesday afternoon and evening. The storm potential remains open from midday to 10 p.m. Wednesday for the Portland, Vancouver metro area. Not everyone will see thunderstorm activity. Those who do see lightning and hear thunder shouldn’t expect much in the way of precipitation.
The thunderstorm threat will keep Oregon’s wildfire potential elevated through Wednesday evening. The lightning potential is expected to fade by sunset across western Oregon.
A Red Flag Warning is set to expire at 9 p.m. on Wednesday. The threat of thunderstorms and higher heat slowly slips away late into the weekend. That’s when cooler air starts to work its way back into the Pacific Northwest.
A more seasonal September outlook will start taking shape by the weekend. Highs will return to near-average conditions in the upper 70s with a few stray showers possible. Portland’s rain chance continues into the middle of next week.
Josh Cozart
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