A Special Weather Statement from NOAA.gov calling for “significant snow accumulations”:

...CHANGE TO WINTER CONDITIONS THIS WEEKEND...

HIGH PRESSURE OVER THE WEST COAST WILL MOVE INTO THE CENTRAL
PACIFIC ON THURSDAY AND FRIDAY. THIS WILL ALLOW ARCTIC AIR TO
MOVE SOUTH FROM ALASKA AND NORTHERN CANADA AND LOWER HIGH
TEMPERATURE READINGS FROM FRIDAY TO SUNDAY BY 20 TO 30 DEGREES.

THE INITIAL BLAST OF COLD AIR IS FORECAST TO REACH THE AREA LATE
FRIDAY OR EARLY SATURDAY AS A STRONG COLD FRONT MOVES INTO
NORTHERN CALIFORNIA AND NORTHWEST NEVADA. AHEAD OF THE
FRONT...WINDS WILL INCREASE AND ARE LIKELY TO BE STRONG AT TIMES
ESPECIALLY OVER THE SIERRA AND ALONG THE HIGHWAY 395 CORRIDOR.
THE FRONT SHOULD MOVE SOUTH AND EAST OF THE AREA BY LATE SATURDAY
AFTERNOON.

THERE IS A CHANCE FOR VALLEY RAIN AND MOUNTAIN SNOW ALONG THE
FRONT. RAIN WILL ONLY OCCUR AHEAD OF THE FRONT...AS SNOW LEVELS
QUICKLY DROP TO VALLEY FLOORS ONCE THE FRONT PASSES. SIGNIFICANT
SNOW ACCUMULATIONS ARE NOT FORECAST TO OCCUR IN THE SIERRA OR
WESTERN NEVADA WITH THIS FRONT.

COLD AIR REMAINS IN PLACE INTO EARLY NEXT WEEK WITH THE MAIN
STORM TRACK FROM THE NORTH. MODELS ARE INDICATING A STORM COULD
AFFECT THE SIERRA AND WESTERN NEVADA SUNDAY THROUGH TUESDAY. THIS
CREATES THE POTENTIAL FOR SIGNIFICANT SNOW ACCUMULATIONS EARLY
NEXT WEEK AS THE STORM COULD PERSIST FOR A DAY OR TWO.