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.

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