Another atmospheric river is expected to bring heavy rain to ... narrow tracts of the Earth’s atmosphere that gather moisture from the tropics near the equator and sweep it toward the poles.

An atmospheric river — the second to wallop the state ... narrow tracts of the Earth’s atmosphere that gather moisture from the tropics near the equator and sweep it toward the poles.

The weather phenomena are common for California winters, but they could cause dangerous debris flows or mudslides in recently ...