PORTLAND, Ore. (KOIN) — Summer heat returns to the Pacific Northwest as Portland area temperatures climb into the 90s once again.
The calendar might read September, but Portland will continue to feel the heat Tuesday. Mostly sunny skies return as highs warm into the low 90s along the Willamette Valley Tuesday afternoon and evening. No records are expected to be broken, but highs will remain warmer than average through the middle of the week.
Extreme heat warnings and heat advisories go into place for much of eastern Washington, the Columbia River Gorge, and north-central Oregon Tuesday. The extreme heat is expected to last through the middle of the week.
Isolated thunderstorms, warm temperatures, and gusty winds will keep the wildfire threat elevated through the central and southern Cascades Tuesday.
Relief from the hot and dry weather comes as early as Tuesday night and into Wednesday morning as clouds return into the area. A brief and isolated rain shower or two is possible moving into the early morning hours Wednesday. No real rain accumulation is expected.
The increase in clouds and moisture will keep Wednesday morning lows close to 70-degrees. The added moisture in the air will help keep Wednesday’s highs in the upper 80s to low 90s with a muggy feel.
Seasonal temperatures are expected to arrive by the end of the week. A stronger lower pressure system will help pull temperatures down into the upper 70s and low 80s by the weekend. The low just off shore will also help increase Oregon and Washington’s cloud coverage.
Temperatures are expected to remain close to average through the start of next week. Oregon and Washington’s monthly outlook keep temperatures near average with a slight increase the rain potential.
Josh Cozart
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