A line of showers continues to move through the valley, with thunderstorms across the foothills and heavy snowfall expected over the Sierra. The heaviest snowfall is expected to occur from around 3am. However, this could change when the center of the storm moves towards the north, potentially triggering additional scattered storms. Forecasters predict that by mid-morning, the valley will gradually dry out and temperatures will gradually decrease. The outlook for the remainder of the week appears relatively uncertain.