A major winter storm is forecast to bring significant snowfall and hazardous conditions to the Sierra Nevada and western Nevada beginning Sunday night and lasting through midweek.
Prolonged Storm System
Forecasters describe the approaching weather as a prolonged, two-part storm. Conditions will deteriorate quickly after sunset Sunday, following a mild and breezy day. Those planning to travel across the Sierra are advised to do so by early Sunday afternoon to avoid anticipated snow and strong winds.
Snowfall Predictions
Snow is expected to reach northeast California Sunday evening and spread southward overnight. Snowfall rates could reach 1 to 2 inches per hour by Monday morning, particularly along the Sierra crest from Lake Tahoe south into Mono County. Snow levels will initially be near 6,000 feet Sunday, falling below 5,000 feet by Monday evening, and potentially dipping even lower during heavier bursts.
Through Monday evening, higher elevations around Tahoe and along the Sierra crest could receive 1 to 2 feet of snow. Communities at lake level may witness 5 to 10 inches, even as areas in Mono County west of U.S. 395, including Mammoth and June Lake, could receive up to a foot. Major Sierra passes are expected to experience chain controls and possible closures.
Western Nevada Impact
The extent of snowfall in western Nevada on Monday remains somewhat uncertain. Forecast models suggest heavier bands could impact northern Washoe County, or areas closer to Reno, Carson City, Minden, and Virginia City. Current projections indicate 1 to 3 inches of snow above 5,000 feet, with rain expected in the lowest valleys. However, heavier precipitation could lead to higher totals and slushy accumulation in foothill areas.
Second Wave and Beyond
A second, stronger wave of the storm is expected to arrive Tuesday and continue into Wednesday morning. This phase will bring colder air, lighter, powdery snow, and stronger winds. Snowfall rates in the Sierra could reach 2 to 3 inches per hour Tuesday afternoon and night, with winds gusting up to 50 mph in communities and exceeding 100 mph on ridgetops. Whiteout conditions are likely.
By early Wednesday, total snowfall could reach 3 to 5 feet above 7,000 feet, with 2 to 3 feet in the Tahoe Basin and Mono County communities west of U.S. 395. Western Nevada valleys are likely to see accumulating snow Tuesday afternoon and evening, potentially impacting the evening commute. Scattered snow showers are forecast to continue through Thursday, creating slick conditions.
A break in storm activity may arrive Friday into next weekend, although longer-range forecasts suggest another cold system could approach during the final week of February.
Frequently Asked Questions
When will the storm commence?
The storm is set to begin Sunday night, with conditions deteriorating quickly after sunset. The second, stronger wave arrives Tuesday.
What areas will be most affected?
The Sierra Nevada is expected to be most heavily impacted, with significant snowfall at higher elevations. Western Nevada valleys are also likely to see accumulating snow, particularly Tuesday afternoon and evening.
What should travelers expect?
Travelers planning to cross the Sierra are urged to do so by early Sunday afternoon. Major Sierra passes are expected to see chain controls and possible lengthy closures.
Will this storm significantly impact the snowpack levels in the Sierra Nevada?
