INLAND EMPIRE METRO: Partly cloudy with a developing chance of showers most likely Tuesday. Temperatures trending cooler into the 60s on Tuesday. Overnight lows cooling into the upper 40s.

MOUNTAINS: Increasing clouds with a chance of showers Monday night, locally heavy Tuesday with snow showers developing. Resort-level highs much cooler by Tuesday in the 30s and 40s and quite windy.

DESERTS: Areas of blowing dust in the northern deserts and increasing clouds. Chance of showers spreading from north to south, windy and turning cooler Tuesday. Highs from the 50s into the 70s Tuesday.

BEACHES: Partly cloudy with a chance of showers on Tuesday. Cooler with highs to 65. Surf 2-5 feet. Water 60-68.

SUMMARY: October weather could turn topsy-turvy.

KEY POINTS
• Tuesday: Widespread light to moderate rain for the coastal basin and mountains
• Strong wind gusts for deserts and desert slopes of the mountains Monday through Tuesday.

Forecasters are sticking with an impending change in Southern California weather.

A Pacific weather system sliding down the coast is bearing chances for showers, hi-elevation snow and decidedly cooler temperatures. Tuesday will likely be the coolest with temperatures 10-20 degrees below normal in all areas except the immediate coast.

Expect precipitation by early Tuesday. The National Weather Service is calling for rainfall amounts of 1-2 inches along the coastal slopes of the San Bernardino Mountains.

By the end of the week, a weak, fair weather high pressure ridge should be in place along with continued seasonably cool temperatures.