US: Adverse winter weather forecast across western regions through at least Feb. 27

Adverse winter weather is forecast across most of the western US through at least Feb. 27. A significant winter storm is expected to bring heavy snow across the higher elevations of the Central Rockies and Cascades through Feb. 26 before expanding into the Sierra and ranges of the Northern Rockies and Great Basin Feb. 27. Around 0.3 meters (1 foot) of snow is possible through the evening of Feb. 27. Widespread, strong, gusty winds are likely; numerous high wind-related watches and warnings are in place across the Intermountain West and the adjacent High Plains. The heavy snow and gusty winds may lead to some areas of blowing or drifting snow and significantly reduced visibility. Some snow squalls are likely across the northern Great Basin and the Rockies Feb. 26; sudden drops in visibility and flash freezes along roadways are possible, resulting in dangerous travel conditions.

As of late Feb. 25, the National Weather Service (NWS) has issued winter storm warnings across parts of western and central Colorado, northern, central, and southeastern Idaho, western and southern Montana, northeastern Nevada, western and far northeastern Oregon, central and north central Utah, western Washington, and western, north central, and south-central Wyoming. Winter weather advisories and high wind-related watches and warnings are in place across most of the rest of the affected region. 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 disruptions to ground and air transport 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.