Southern California: It's a chilly Wednesday morning, but a dry, sunny afternoon is ahead, with temperatures into the high 60s and low 70s in most areas. Rain chances increase this weekend as a storm moves south from the Pacific Northwest.

An atmospheric river on Wednesday will bring heavy rain and mountain snow to parts of Northern California. The KCRA 3 weather team is issuing an Alert Day specifically for areas north of Interstate 80 and the northern Sacramento Valley because of the potential for isolated street flooding. Alert Days are more severe than Impact Days, which are issued when outdoor activities and travel could be affected. A bomb cyclone is helping steer the atmospheric river toward Northern California. It is far enough away from the California coast that it will not bring the destructive winds bomb cyclones are typically associated with.