Buffalo to Seattle Turbulence Forecast

BUF → SEA · 2,116 miles · ~4h 44m

What to Expect

The Buffalo to Seattle route, arcing northwest over 2100-plus miles, is interesting turbulence-wise. Early in the flight, expect some possible mechanical turbulence as you cross the Northern Appalachians, and perhaps lake-effect turbulence over the Great Lakes, both caused by air interacting with geography. As you move into the Upper Midwest and the Great Plains, you might feel some clear-air turbulence, or CAT, which is often found at higher altitudes. The Rockies then present a chance of mountain wave turbulence; similarly, crossing the Cascades could bring more mountain wave effects. Finally, as you approach Seattle over the Pacific Coast, there is a possibility of clear-air turbulence (CAT) again. Keep in mind that pilots are constantly monitoring and adjusting for these common weather patterns, and turbulence is more of a routine factor than a surprise.

The Buffalo to Seattle route crosses the Northern Rockies, a rugged expanse of high peaks in Montana, Idaho, and Wyoming. Mountain wave turbulence is frequent here, especially when Pacific storm systems push strong winds over the Continental Divide. Pilots often report moderate chop between 30,000 and 40,000 feet over this region.

Turbulence Factors on This Route

• Mechanical Turbulence: The Northern Appalachians generate low-level mechanical turbulence during strong post-frontal northwest winds.
• Lake-Effect Turbulence: The Great Lakes produce lake-effect convection and low-level wind shear from land-water temperature contrasts.
• Clear-Air Turbulence (CAT): The Upper Midwest sits beneath frequent polar jet stream intrusions, producing clear-air turbulence at cruising altitudes.
• Mountain Wave Turbulence: The Northern Rockies generate powerful lee waves when Pacific fronts drive westerly flow across the high terrain.

When Is This Route Bumpiest?

For the smoothest possible flight, aim for summer or early fall. Conditions are generally more stable then, reducing the likelihood of significant turbulence. Winter, late fall, early winter, early spring, spring, and fall tend to be bumpier. This is because the jet stream is stronger and more erratic, increasing clear-air turbulence. In addition, increased temperature differences create more instability, leading to more frequent and intense mechanical and mountain wave turbulence as air interacts with the Appalachians, Rockies, and Cascades.

Tips for This Flight

If you're concerned about turbulence, booking a morning flight often provides a slightly smoother ride, as the atmosphere tends to be more stable earlier in the day. Any turbulence you encounter on this route is most likely to feel like driving on a bumpy, unpaved road for a few minutes at a time. Choosing a seat over the wing can minimize the sensation of movement, and staying well-hydrated can also help you feel more comfortable. Remember, the crew is highly trained to handle these conditions, and turbulence is a normal part of flying.

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Forecasts based on NOAA HRRR and GFS atmospheric model data.