Chances for rain showers ending overnight with partial clearing...freezing fog in the Sierra Valleys. Reno-Sparks morning low temperature 32 degrees...Monday high 60 degrees. Lake Tahoe morning low 24 degrees, climbing to 48 Monday afternoon. Mostly sunny and mild Monday but increasing clouds and winds on Tuesday signal the next approaching storm. Rain and snow expected overnight Tuesday in the Tahoe Basin, then down to valley floors Wednesday.