Could that be snow in the Lake Tahoe forecast?

SOUTH LAKE TAHOE, Calif. - If you think it's been colder than usual this past week, you're right. Temperatures have been below normal, and these will continue through the week. While the start of the week will be dry, things are looking more interesting from midweek onward as several weak systems move through the region, according to the National Weather Service (NWS) in Reno.

While none of these will be major storms, anticipate periods of snow and travel difficulties. Exactly how much snow though, is the question until the systems get closer.

The first is a compact, fast-moving upper-low system diving south along the California coast Tuesday night into Wednesday. The best moisture and dynamics remain west of the Sierra and chances for snow rapidly diminish as the system gets over Tahoe and western Nevada.

The timing and trajectory of the waves of moisture Thursday-Sunday continue to differ. If traveling, keep an eye on the forecast and watch road conditions. Forecasters say there could be up to a foot of snow at upper elevations, but still too early to get exact numbers.

If getting up your outdoor Christmas decorations, Monday and Tuesday will be the best days.

The South Lake Tahoe forecast from NWS Reno:

Today - Sunny, with a high near 46. South wind around 5 mph becoming north in the afternoon.

Tonight - Mostly clear, with a low around 19. Southeast wind around 5 mph.

Tuesday - Sunny, with a high near 49. Calm wind becoming southwest around 5 mph in the morning.

Tuesday Night - Partly cloudy, with a low around 21. Southwest wind around 5 mph.

Wednesday - A 50 percent chance of snow, mainly after 10 am. Partly sunny, with a high near 42. Calm wind becoming southwest around 5 mph in the morning. Little or no snow accumulation is expected.

Wednesday Night - A 30 percent chance of snow, mainly before 10 pm. Mostly cloudy, with a low of around 20. West wind around 5 mph. Little or no snow accumulation is expected.

Thursday - A 50 percent chance of snow after 10 am. Mostly cloudy, with a high near 39. New snow accumulation of less than a half inch is possible.

Thursday Night - Snow likely. Mostly cloudy, with a low of around 19.

Friday - A chance of snow. Partly sunny, with a high near 36.

Friday Night - A chance of snow. Mostly cloudy, with a low around 18.

Saturday - A chance of snow. Mostly cloudy, with a high near 38.

Saturday Night - A chance of snow. Mostly cloudy, with a low of around 19.

Sunday - A chance of rain and snow. Partly sunny, with a high near 41.