Heavy Rain Coming To San Mateo: Detailed Weather Forecast

SAN MATEO, CA — The Bay Area is expected to be doused with rain this work week, as a storm enters the region, the National Weather Service says.

"An approaching upper level system will result in the potential for widespread rainfall beginning over the North Bay late tonight and across the remainder of the region Tuesday morning," the NWS said Monday morning. "Showers will linger into early Wednesday morning before conditions dry out for the remainder of the week."

Here's the full work-week forecast for San Mateo, courtesy of the National Weather Service:

Monday
A 20 percent chance of showers after 11am. Mostly cloudy, with a high near 64. Light south southwest wind increasing to 6 to 11 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.

Monday Night
A chance of showers, then showers likely and possibly a thunderstorm after 11pm. Some of the storms could produce heavy rainfall. Cloudy, with a low around 57. Southwest wind 6 to 9 mph becoming east after midnight. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Tuesday
Showers and possibly a thunderstorm before 11am, then showers likely. High near 64. East wind 7 to 10 mph becoming west southwest in the morning. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tuesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 56. South southwest wind around 11 mph. New precipitation amounts of less than a tenth of an inch possible.

Wednesday
A 20 percent chance of showers. Partly sunny, with a high near 62. South southwest wind around 15 mph, with gusts as high as 18 mph. New precipitation amounts of less than a tenth of an inch possible.

Wednesday Night
Partly cloudy, with a low around 55.

Thursday
Mostly sunny, with a high near 61.

Thursday Night
Mostly clear, with a low around 52.

Friday
Sunny, with a high near 62.

Friday Night
Mostly clear, with a low around 53.

An upper level system will continue to approach the California coast during the next 24 hours. Rain chances increase late today into Tuesday, yet confidence has decreased on how much rainfall the region will see. Stay tuned... #BayAreaWX #CAwx pic.twitter.com/x7IG8eTQmj
— NWS Bay Area (@NWSBayArea) October 1, 2018

-- Patch file photo by Renee Schiavone