A low pressure system waiting just offshore of British Columbia will slowly begin its descent into our region. It will be pushing a few cold fronts our way. One will be overnight on Sunday allowing for clouds to begin building Sunday afternoon. Light, isolated rain showers will accompany this system. Showers will start at the coast overnight Sunday and continue through the morning on Monday. The Western Cascades will likely see showers through much of the day on Monday as well. Downsloping winds will keep the valleys and basin dry, however some areas higher in elevation could see a shower or two. Because the first wave of this system is further to the north and moving northeast, Northern California will have mostly sunny skies for Monday. Tuesday will see a small break in the precipitation before another wave on Wednesday.
The pesky low pressure system will continue down the coast through mid-week. A second cold front will pass through the area on Wednesday bringing another wave of precipitation to our area. Showers will once again be light and isolated, however they will be more widespread. Instability will also be greater with this system, so the chance for isolated thunderstorms will be present. High pressure will build in by Thursday bringing sunny skies and warmer temperatures back to the region.
Thanks for logging on and enjoy your Memorial Day!
Meteorologist Seth Phillips