Winter Storm Warning Upgraded: Up to 60 Inches of Snow and 90 MPH Winds Hit Sierra Nevada

A powerful winter storm has intensified across the Sierra Nevada, prompting the National Weather Service to upgrade warnings for the entire region. Forecasters now expect up to five feet of snow in higher elevations along with wind gusts reaching 90 miles per hour, creating extremely dangerous travel conditions.

The storm is already impacting major routes including Interstate 80, Highway 50 and Highway 395, where chain controls are in effect and full closures are increasingly likely through the weekend. Authorities warn that travel across mountain passes could become nearly impossible.

Updated forecasts from regional offices of the National Weather Service show a significant increase in snowfall totals and wind speeds. Areas above 6,000 feet could see as much as 60 inches of snow, while snowfall rates may reach one to two inches per hour during peak periods. Gusts at higher elevations are expected to reach up to 90 mph, significantly reducing visibility and increasing the risk of whiteout conditions.

Popular mountain routes such as Donner Pass and Echo Summit are expected to be among the hardest hit. If closures occur simultaneously on these routes, there will be limited or no alternate options for crossing the Sierra Nevada.

Conditions are forecast to worsen overnight Saturday into Sunday morning, when the most intense part of the storm arrives. Snow levels are expected to drop to as low as 4,000 feet, expanding the impact to lower elevations and increasing the likelihood of widespread disruptions.

Officials are urging residents and travelers to avoid unnecessary trips. Those already in affected areas are advised to carry emergency supplies, including food, water, blankets and tire chains, and to be prepared for delays or being stranded.

Even after snowfall eases, hazardous conditions are expected to persist due to heavy accumulation and potential ice formation. Authorities warn that road clearing operations may take several hours or longer, especially in areas receiving the heaviest snowfall.

The storm highlights the ongoing risks of late-season weather in mountainous regions, with officials stressing that safety should remain the top priority as conditions continue to evolve.

Courtesy: autoblog