Tuesday is expected to be the warmest day of the week with a forecast high of 77 in Portland. The forecast begins to change ...

It’s Back!!! The "blob" has returned. This "blob" is the marine heatwave that now spans much of the Northeast Pacific Ocean.

PORTLAND, Ore. (KOIN) — The Pacific Northwest could see a cooler and wetter fall and winter, and even a chance of snow, according to the latest forecast from meteorologists. The National Weather ...

The outlook for the 2025-2026 winter is shaping up to be complex, with forecasters having to monitor a marine heat wave over ...

The temperature map gives a little more specificity. According to the Climate Prediction Center, the northwest part of Oregon ...

La Niña is part of the El Niño Southern Oscillation, or ENSO, cycle. It refers to a period when lower ocean surface temperatures in the tropical Pacific bring higher precipitation and cooler weather ...

KOIN 6 Chief Meteorologist Josh Cozart explains when the warm weather will fade and wet weather begins as Portland moves towards the middle of October.

A record-breaking and astonishingly expansive marine heat wave is underway in the Pacific Ocean, stretching from the water ...

The final days of the summer season are here until the fall equinox on Monday, September 22. Days are getting shorter and nights longer. This time of year, each day is shorter by close to three and a ...

A rare atmospheric river is unfolding across the Northwest to end the week, with over a month's worth of rain possible in some parts of Oregon and Washington, forecasters said. The rain event should ...

WASHINGTON, USA — With only a couple months left in summer for 2025, the Farmer's Almanac is looking ahead. The Almanac, which has released weather predictions since 1818, recently released their fall ...