US: Adverse winter weather forecast across northern and central California through at least Nov. 26

Adverse winter weather is forecast across parts of northern and central California through at least Nov. 26. Onshore flow will produce rain and higher-elevation snow over parts of northern and central California. The snow will be heavy over the Sierra Nevada Mountains through the evening of Nov. 26, while moderate to heavy snow is likely over the Central Rockies the evening of Nov. 25-Nov. 26. Hazardous travel conditions are likely due to reduced visibility.

As of late Nov. 24, the National Weather Service (NWS) has issued winter storm warnings across most of the affected area. Officials could update and extend the coverage of the weather alerts over the coming days.

Snow accumulations are likely across the affected region, especially at higher elevations. Lesser accumulations are possible where sleet and freezing rain mix with the snow, and precipitation is less intense. In addition to the heavy snow, strong wind gusts will likely lead to periods of blowing and drifting snow in some areas. Sporadic power outages could occur throughout the affected region.

The winter weather will likely cause ground and air transport disruptions over the coming days. Traffic and commercial trucking delays are probable along regional highways. Dangerous and challenging driving conditions are likely on secondary and rural roads in the affected states as maintenance crews prioritize clearing major routes. Authorities will probably close stretches of highways if driving conditions become too hazardous. Flight delays and cancellations are likely due to ground stops and deicing operations at regional airports.