24 Mar 2023 | 11:32 AM UTC
US: Adverse winter weather forecast over northwestern and western regions through at least March 26 /update 1
Heavy snowfall forecast across parts of the northwestern and western US through at least March 26. Hazardous travel conditions likely.
Event
Adverse winter weather is forecast across parts of the northwestern and western US through at least March 26. A cold front is forecast to bring heavy snowfall to elevated areas of the Pacific Northwest and northern California, as well as further into the interior of the country over much of the northern and central Rockies. Daily snowfall accumulations of more than 45 cm (18 inches) are possible in mountainous parts of the affected area. Strong winds could also combine with snowfall to cause blizzard conditions. Hazardous driving conditions are likely across the affected area due to icy roads and reduced visibility caused by blowing snow.
Government Advisories
As of early March 24, the National Weather Service (NWS) has issued winter storm warnings for parts of southwestern Washington, western Oregon, southern Montana, northern and western Wyoming, and northern Utah. Winter weather advisories are in place across parts of western and southeastern Washington, western and northeastern Oregon, northern California, central and eastern Idaho, central and western Montana, central, southern, and western Wyoming, central and northern Utah, and northern and western Colorado. Freeze warnings and frost advisories have been issued across parts of north-central California, and high wind warnings, watches, and advisories are in place across parts of the affected area. Officials could update and possibly extend the coverage of weather alerts over the coming days.
Hazardous Conditions
Snow accumulations are likely across the affected area, especially at higher elevations. Lesser accumulations are possible where sleet and freezing rain mix with the snow, and precipitation are less intense. In addition to the heavy snow, strong wind gusts will likely lead to periods of blowing and drifting snow in some areas. Blizzard conditions are possible. Sporadic power outages could occur throughout the affected area.
Transport
The winter weather will likely cause ground and air transport disruptions over the coming days. Traffic and commercial trucking delays are possible along regional highways. Dangerous and challenging driving conditions are also likely on secondary and rural roads in the affected states as maintenance crews prioritize clearing major routes. Authorities could close stretches of highways if driving conditions become too hazardous. Flight delays and cancellations are possible due to ground stops and deicing operations at regional airports.
Advice
Monitor local media for updated weather information. Verify road conditions before driving in areas where heavy snowfall is forecast. Allow extra time to reach destinations in these areas and carry an emergency kit and warm clothes if driving is necessary, especially on secondary or rural routes that could become impassable. If routing shipments by truck through the affected area, plan accordingly for delivery delays. Confirm flights. Charge battery-powered devices in the case of prolonged electricity outages.
