Snow flurries are continuing to fall in the Sierra as the Sacramento Valley is expected to remain mainly dry Monday after a very soggy weekend. Two inches of fresh powder had already fallen at Donner Summit by 6 a.m., prompting chains to be required up Interstate 80. Another 1 to 2 inches of snow is expected to accumulate Monday for areas above 6,000 feet as a winter weather advisory remains in effect until 11 a.m.