I use the following sites to track backcountry snow conditions and create forecasts specific to the Tahoe Sierra backcountry.

Tropical Tidbits: A free source of global weather models and ensembles.

Mountaintop Weather Stations: A collection of mountain weather stations across the Tahoe region and Eastern Sierra

NWS Reno: Spot forecasts and discussions from the most accurate free forecasting service

Sierra Avalanche Center:

SnoTel Sensors:

Carnelian Bay Weather Station:

Tahoe Backcountry Alliance Access Map