We'll have two more sunny autumn days to enjoy this week - today and tomorrow - before things begin to change for the wetter. If you have outdoor plans for Saturday, better switch them to Sunday.

Forecasters out at Sterling are watching a strong low-pressure system that's forming out over the Central Plains. That storm will draw moisture from the northern Gulf of Mexico, and deliver it here beginning Friday night. Saturday looks like a washout. Here's a pretty cool satellite loop looking at the water vapor winding into in the storm.

The rain will begin as showers sometime Friday evening. Only a fraction of an inch is likely, if the forecast holds up. But Saturday will bring as much as an inch or two more, with heaviest amounts in the thunderstorms that could pop up. Mariners could face gale-force winds, and some minor coastal flooding is possible. It's a fast-moving storm, so the worst of it will be over as early as 2 p.m. But the rain could still linger into the evening hours Saturday, with another half-inch possible.

There does not appear to be much risk of flooding, despite the heavy rain. It's been so dry this month that creek levels are low, so there's plenty of room for the runoff. That may not hold in urban areas, where some street flooding is possible. 

Here's AccuWeather.com's take on the storm.

Sunday would be rain-free under this scenario, but mostly cloudy. The nice weather returns for the first part of the new workweek, with sunny skies and highs in the 50s. Mid-week could see another significant rainstorm.