PORTLAND, Ore. (KOIN) — Tis the season for atmospheric rivers as the Pacific Northwest expects the return of rain next week. The scattered rain showers seen across the Pacific Northwest this ...

Bomb cyclones can occur when a cold air mass collides with a warm air mass, which is how some significant winter storms can happen. When an atmospheric river and bomb cyclone occur at the same ...

Strong ARs transport water vapor roughly equivalent to 7.5 to 15 times the average flow of the Mississippi River. Annually, ...

Atmospheric river the cause. Atmospheric rivers, sometimes known as a “Pineapple Express” because the long and narrow bands of water vapor convey warm subtropical moisture across the Pacific ...

The Pacific Northwest braces for a second atmospheric river in less than a few days this weekend. Rain arrives early Saturday morning and is expected to last through Sunday.

At least two people have died in Oregon amid ongoing flooding resulting from an intense atmospheric river bombarding the Pacific Northwest. One man was found dead Tuesday in Bronson Creek in ...

"Atmospheric river will produce one last round of heavy rain/mountain snow and strong wind gusts across the Pacific Northwest today," the National Weather Service (NWS) said in a Short Range ...

Flooded streets in Santa Barbara, Calif., on Sunday. Forecasters said the atmospheric river — a huge plume of moisture drawn from the Pacific Ocean — is expected to stall over the city of Los ...

An atmospheric river hit the Pacific Northwest over the weekend, with a second round of heavy rain and snow arriving earlier this week. Poor weather conditions are expected across three states in ...

While river flooding was expected to linger in western Washington on Wednesday, the rivers were receding and no rivers in the region remained in major flood stage, the weather service said. Flood w… ...

The scattered rain showers seen across the Pacific Northwest this week is a sign of the wet weather to come in the months ahead. Atmospheric river season is ramping up as the flow of moisture from ...

In most regions, if the atmospheric pressure drops at least 24 millibars within 24 hours, it is considered a bomb cyclone. Bomb cyclones can occur when a cold air mass collides with a warm air ...