Atmospheric River Strikes Pacific Northwest
The Pacific Northwest is set to experience a significant weather phenomenon this week as an atmospheric river strikes the region, bringing heavy rain and strong winds. This weather event will affect areas from Northern California to Northern Washington, establishing a wet and windy pattern. The National Weather Service has issued alerts for various regions, highlighting the expected impacts from this atmospheric river.
Forecast Overview
Two major storm systems will infiltrate the region, each contributing to a mixture of rain, snow, and wind. Here’s a breakdown of the timing and effects:
Timing of the Storms
- Early Thursday (Storm #1): The first significant storm is making landfall, bringing strong winds, especially in lower elevations of Northern California. Gusts may reach 45 mph to 75 mph in higher mountain areas.
- Thursday Night – Friday (Storm #2): A second, less intense storm system will follow the first, affecting Washington, Oregon, Idaho, and western Montana.
Wind and Rain Impacts
This atmospheric river is expected to produce the following weather impacts:
- Wind gusts of up to 100 mph in the Sierra Nevada region.
- Potential for uprooted trees and power outages due to the strong winds.
- Rainfall amounts between 3 to 7 inches across the impacted areas, with isolated areas receiving up to a foot.
- Increased risk of flash flooding, particularly in areas prone to mudslides.
Snow Accumulation Expectations
In addition to rain, the higher elevations will receive significant snowfall:
- Forecasts indicate 12 to 18 inches of snow in the Cascades and parts of the northern Rockies.
- Some locations may experience even higher totals.
The ongoing precipitation could lead to more localized flooding, particularly as grounds remain saturated from previous weather events. For instance, the Snoqualmie River in Washington is running high due to recent atmospheric conditions.
Conclusion
Residents of the Pacific Northwest should remain vigilant as this atmospheric river brings a mix of severe weather, impacting travel and safety across multiple states. Stay informed through local weather services for updates and alerts as conditions evolve throughout the week.
