Rochester to Spokane Turbulence Forecast

ROC → GEG · 1,938 miles · ~4h 23m

What to Expect

The Rochester to Spokane route, heading northwest almost 2000 miles, will likely have moments of turbulence. After leaving Rochester, you will cross the Northern Appalachians, where mechanical turbulence from the mountains can cause some chop. Further west, crossing the Great Lakes, lake-effect turbulence might add some bumps, especially if the air is cooler than the water. As you continue over the Upper Midwest and the Great Plains, you might experience clear-air turbulence (CAT), which is often unexpected, but usually short-lived. Finally, nearing Spokane, you'll cross the Northern Rockies, where mountain wave turbulence, caused by wind flowing over the mountains, could create some moderate bumps. Remember, pilots are trained to handle these well-understood weather patterns, adjusting altitude or course as needed to ensure a safe, comfortable flight.

The Rochester to Spokane 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 flight, aim for the summer or early fall. During these months, the air is generally more stable over the Great Lakes and the mountain wave effect is minimized in the Rockies. Winter, late fall, early winter, early spring, and spring tend to be bumpier. Cold air rushing over the relatively warmer Great Lakes can create lake-effect turbulence. Stronger winds in the Northern Appalachians and the Northern Rockies increase mechanical and mountain wave turbulence. Clear-air turbulence is more common when there are greater temperature differences in the atmosphere, more common in spring and fall.

Tips for This Flight

If you are concerned about turbulence, booking a morning flight tends to be a little calmer since the atmosphere has had less time to warm up and create unstable air. Any turbulence you encounter is likely to feel like driving on a road with small potholes or larger bumps. It’s rarely as dramatic as it feels. Staying well-hydrated can help you feel more relaxed, so drink plenty of water before and during the flight. Remember that the flight crew is there to help you feel comfortable, and they have seen it all before.

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Forecasts based on NOAA HRRR and GFS atmospheric model data.