Seattle to Denver Turbulence Forecast

SEA → DEN · 1,022 miles · ~2h 33m

What to Expect

This Seattle to Denver flight, heading southeast over 1022 miles, crosses some significant geographic features that can contribute to turbulence. You'll first be flying over the Cascades, where mountain wave turbulence is common, caused by wind flowing over the mountains. Then, as you approach the Pacific Coast, you might experience clear-air turbulence (CAT), a phenomenon that can occur even in seemingly clear skies. Further inland, the Northern and Central Rockies, and finally the Front Range, can also generate mountain wave turbulence. It's important to remember that pilots are very familiar with these patterns. They use weather forecasts and onboard radar to navigate and often avoid the roughest patches, or advise the cabin to buckle up when that isn't possible. These bumps are a normal part of flying over mountainous terrain.

The flight between Seattle and Denver 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 flight, aim for the summer or early fall. During these months, the atmospheric conditions tend to be more stable over the Rockies. Conversely, fall, winter, early spring, and late spring can be bumpier. This is when stronger winds interact with the mountains, creating more mountain wave turbulence. Also, temperature differences between air masses are more pronounced, which can cause CAT near the Pacific Coast.

Tips for This Flight

If possible, booking a morning flight is often your best bet for a smoother ride. The atmosphere tends to be calmer earlier in the day. Any turbulence you do encounter on this route will likely feel like driving over a bumpy road or hitting a few potholes. For added comfort, choose a seat over the wing. It tends to be the most stable part of the plane. Remember to stay well-hydrated, and focus on taking slow, deep breaths. You'll be in Denver before you know it.

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Forecasts based on NOAA HRRR and GFS atmospheric model data.