Don't get too excited by the title. Yes, we are expecting some rain followed by cooler weather as a cool front moves in Tuesday. However, the source of this cool front is the Pacific, not the Arctic, so the cool down won't last very long; maybe just a day or two. Even though the front is the last in a series of systems that brought significant rainfall and flooding to Oregon, Nevada and Northern California, we shouldn't see that kind of rain. Here's a forecast map of the position of the front by Tuesday afternoon:
TONIGHT: Partly cloudy skies early with increasing clouds after midnight. Lows in the upper 60s. South winds 5-10 mph.
TUESDAY: Low clouds with intermittent rain early then scattered showers by afternoon. Southerly winds 5-10 becoming northwest 5-10 by early evening. Temperatures in the mid to upper 70s.
WEDNESDAY: Clearing skies with a drier, cooler feel to start the day. Morning temperatures in the mid 50s, low 70s by afternoon.