NOAA is calling for snow this weekend in the Sierra Nevada mountains including Lake Tahoe, Yosemite, & Mammoth.

Snow levels are forecast to dip as low as 5,000′ on Monday morning.

Another breezy day Sunday ahead of the upper low with some wetting
moisture possible late in the afternoon into the evening. Much of
this will fall as snow above the 6-7000 foot level.

As far as precip amounts, they overall look to be light and less
than 1/4". Snow levels will start near 7000 feet Sunday afternoon
and fall to near 5000 feet Monday morning. With these snow levels a
couple inches of wet snow is possible in the higher elevations above
6000 feet, including around Lake Tahoe. Still, given the showery
nature it won`t be widespread, but there are possible travel impacts
over the passes. - NOAA Reno, NV today

“The first cold system of the season will impact the northern part of our forecast area Sunday night through Monday morning. Cloudy skies, cooler temperatures and shower activity can be expected over much of the northern half of the forecast region. The higher elevations of the Sierra Nevada can expect some light snow, however right now it appears that amounts will be on the light side, not requiring a Winter Weather Advisory. Campers and Hikers traversing to higher elevations should be prepared for winter-like conditions. Be sure to pack winter clothing and supplies.” – NOAA Hanford, CA today