Atmospheric rivers are more common during the winter months, but officials are warning people not to let their guard down.

delivering scattered showers and the potential for an atmospheric river by the end of the month. The warming trend kicking off this week is fairly typical for the Bay Area’s shoulder season ...

After several days of unseasonably hot weather, a major cooldown is on the way for the Bay Area ... “That’s when we’re expecting the atmospheric river to arrive,” he said.

When a bomb cyclone meets an atmospheric ... river, a plume of moisture that extended over the Pacific to near Hawaii. Heavy rain and gusty winds that began hitting the San Francisco Bay Area ...