Spokane to Seattle Turbulence Forecast

GEG → SEA · 223 miles · ~57m

What to Expect

That Spokane to Seattle route is a quick hop, but it does have some interesting potential for bumps. Because you're heading west, you'll first be crossing the Cascades mountain range. The wind flowing over those mountains can create what's called Mountain Wave Turbulence, which can feel like moderate chop. Later in the flight, as you approach Seattle and the Pacific Coast, you might encounter Clear-Air Turbulence, or CAT. CAT is caused by changes in air pressure and wind speed at higher altitudes; it's often invisible and hard to predict, but pilots are always monitoring conditions and using their experience and onboard systems to navigate it. It's important to remember that turbulence is a normal part of flying, and pilots are highly trained to handle it safely. They encounter these phenomena all the time, especially on routes like yours that cross significant geographic features.

The flight between Spokane and Seattle passes over the Cascades, the volcanic mountain chain stretching from northern California through Washington. When moist Pacific air is forced up and over the Cascades, it creates both orographic turbulence and downstream wave activity. The terrain is especially steep near major volcanoes like Mount Rainier, amplifying the effect.

Turbulence Factors on This Route

• Mountain Wave Turbulence: The Cascades create lee waves and orographic turbulence, especially when Pacific weather systems push moist air over the range.
• Clear-Air Turbulence (CAT): Pacific jet streaks arriving onshore drive upper-level clear-air turbulence along the West Coast.

When Is This Route Bumpiest?

For the smoothest possible ride, try to fly this route in the summer or early fall. During these months, the atmospheric conditions tend to be more stable, reducing the likelihood of both Mountain Wave Turbulence and Clear-Air Turbulence. However, fall, winter, and early spring can be a bit bumpier. The winds are stronger during these seasons, increasing the chance of Mountain Wave Turbulence as air rushes over the Cascades. Winter storms can also contribute to increased Clear-Air Turbulence near the coast.

Tips for This Flight

If you're concerned about turbulence, booking a morning flight can often lead to a smoother experience, as the air tends to be calmer earlier in the day. Any turbulence you might experience on this route is most likely going to feel like driving over a bumpy road or hitting a few potholes. To stay comfortable, choose a seat over the wing, as this area of the plane experiences less motion. Remember to stay hydrated and focus on slow, deep breaths; know that the pilots are well-prepared to navigate any bumps, and you'll be in Seattle before you know it.

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Forecasts based on NOAA HRRR and GFS atmospheric model data.