'The Storm Door Is Officially Open' In San Mateo, Officials Say

SAN MATEO, CA — Sunday brought showers and good news for San Mateo residents ready to usher in fall weather amid a record-shattering drought in California: "The Storm Door is officially open," the National Weather Service said Monday.

It's unclear what the coming months will bring, but get ready for cooling temperatures and more rain this week and weekend as wet weather systems were expected to swoop into the Bay Area, officials said.

"Needless to say, we're just a tad excited," the weather service said.

Wind, wet roads and weather-related crashes are possible as a result, officials warned. As of Monday morning, the forecast for San Mateo said rain was possible again Tuesday through Sunday.

Here's the forecast for San Mateo for the remainder of the week:

Tuesday: Mostly sunny, with a high near 68. Light south southeast wind becoming south southwest 10 to 15 mph in the morning. Winds could gust as high as 20 mph.

Tuesday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 54. South southeast wind around 14 mph, with gusts as high as 32 mph. New precipitation amounts between a tenth and quarter of an inch possible.

Wednesday: A 50 percent chance of rain. Cloudy, with a high near 66. South wind 14 to 16 mph, with gusts as high as 25 mph. New precipitation amounts between a tenth and quarter of an inch possible.

Wednesday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 57. New precipitation amounts of less than a tenth of an inch possible.

Thursday: Rain likely, mainly before 11am. Mostly cloudy, with a high near 70. Chance of precipitation is 60%.

Thursday Night: A chance of rain. Mostly cloudy, with a low around 57.

Friday: Rain likely, mainly before 11am. Mostly cloudy, with a high near 68.

Friday Night: Mostly cloudy, with a low around 52.

Saturday: A chance of rain. Mostly cloudy, with a high near 67.

Saturday Night: A chance of rain. Mostly cloudy, with a low around 54.

Sunday: A chance of rain. Mostly cloudy, with a high near 67.

Keeping an eye on the forecast? Here's how to decipher rain probabilities, according to the weather service.

• Slight chance of rain: 20 percent.
• Chance of rain: 30 to 50 percent.
• Rain is likely: 60 to 70 percent.
• Highest confidence in the arrival of rain: 80 to 100 percent.

A few storms are affecting the western United States, weather officials said. One storm affecting California will head next to the central Plains, where it is expected to bring snow to Wyoming.