Wet and Windy Weather Expected Across the Region This Christmas Week

An active weather pattern is set to impact the Pacific Northwest, bringing a mix of rain, high mountain snow, and windy conditions through the Christmas holiday and beyond. Here's what to expect in the coming days:

Christmas Day Forecast:

The region is expected to see relatively calm weather on Christmas Day, with high pressure settling in after the Christmas Eve trough passes. However, some light rain and high mountain snow are possible west of the Cascades due to overrunning moisture. Precipitation chances range between 50-70%.

Christmas Night Through Thursday:

Conditions will take a dramatic turn starting Christmas night as a strong, energetic weather system pushes inland. This will bring wet and windy weather across the area, fueled by strong onshore flow. Snow levels are forecasted to range between 4,500 and 5,000 feet, with local ski resorts such as Willamette Pass, Mt. Ashland, and Mt. Shasta expecting 6-12 inches of snow. Crater Lake’s high elevations could receive over a foot of snow within a 24-hour period ending Thursday afternoon, with a 60% chance of this accumulation according to the National Blend of Models (NBM).

Thursday Night Through the Weekend:

The wet pattern intensifies heading into Thursday night and the weekend, driven by a persistent onshore Pacific jet stream and periodic shortwave systems. The south coast, including Josephine and western/southern Siskiyou counties, is expected to see three-day precipitation totals of 3 inches or more, with similar amounts predicted in the Cascades from Willamette Pass to Highway 140.

Flood Potential:

With the extended period of heavy precipitation, attention is turning to flood risks, especially for the coastal areas and parts of Douglas, Josephine, and Siskiyou counties. Localized flooding could develop late in the weekend and continue into early next week as saturated soils struggle to absorb additional rainfall.

Key Takeaways for Residents and Visitors:

• Travelers: Expect challenging travel conditions in higher elevations, with significant snow impacting mountain passes. Prepare for winter driving conditions and check for updates on road closures.
• Outdoor Enthusiasts: While ski resorts are gearing up for fresh powder, those venturing into the backcountry should be cautious of rapidly changing weather and avalanche risks.
• Low-Lying Areas: Residents in flood-prone regions should stay alert for potential warnings and be ready to take precautionary measures if needed.

As this active weather pattern evolves, stay tuned for updates and advisories from the National Weather Service.