A storm from the Gulf of Alaska is expected to begin dousing the Southland Sunday afternoon, the National Weather Service said.

The storm is expected to generate an inch or an inch-and-a-half of rain in Long Beach and Downtown L.A. but up to 3 inches in the San Gabriel Mountains, the NWS said. A winter storm storm advisory was issued for the mountains of Riverside and San Bernardino counties.

In the San Gabriel mountains, snow is expected above the 6,000-foot level and is not expected to affect Interstate 5.

Rain in Long Beach is expected to begin Sunday afternoon, with a 90% chance of rain and thunderstorms possible through Monday. Wind gusts on Sunday could reach 25 mph.

There’s a roughly 40% chance of rain Tuesday and Wednesday morning as well.

Temperatures will be on the cool side, with a high of 62 degrees on Sunday, 58 degrees on Monday and 60 degrees Tuesday and Wednesday.

City News Service contributed to this report.