Seattle

Is Seattle-Tacoma Airport turbulent?

Seattle faces Pacific weather systems including powerful atmospheric rivers that dump feet of rain on the region. The Cascade Mountains to the east can create turbulence when winds are strong, though the airport itself sits in a relatively protected position. Winter storms bring heavy rain and gusty winds but rarely cause extended closures.

• Atmospheric rivers can make Pacific Northwest 'wettest place on Earth' for days
• Cascade Mountains create mechanical turbulence in strong winds
• Winter storm gusts reach 25-45 mph in the Seattle area

What is an atmospheric river?

An atmospheric river is a narrow corridor of moisture that flows from the tropical Pacific to the Pacific Northwest, bringing days of heavy rain. These systems can dump 2-6 inches on lowlands and up to 10 inches in the mountains. While not as disruptive as hurricanes, they bring sustained rain, gusty winds, and localized flooding.

When is the best time to fly from Seattle?

June through September offers the driest, most pleasant conditions. Late autumn through winter brings the most atmospheric river activity. Spring is variable but improving. Seattle's weather is rarely severe enough to close the airport, but expect rain-related delays in the wet season. Cloud ceilings can reduce visual approaches.