Another Atmospheric River is forecast to pound the Pacific Northwest with several inches of rain on Monday and Tuesday just after a short break in the rain.

The National Water Center said that "considerable" flooding impacts are expected across the Cascade Foothills to Puget Sound, with urban and minor river flooding also possible throughout the remainder of western Washington and parts of northern Oregon. It also warned that landslides would be possible along the Cascade Foothills.

Here's how an atmospheric river, particularly the powerful Pineapple Express, works and why it can carry so much precipitation.

KOIN 6 Chief Meteorologist Josh Cozart shares the swift-flowing waters of Multnomah Falls and Wahkeena Falls along the Columbia River Gorge. This comes a day after a powerful and record-breaking atmospheric river brought heavy rain to the Pacific Northwest.