Phoenix to Des Moines Turbulence Forecast

PHX → DSM · 1,147 miles · ~2h 48m

What to Expect

Your flight from Phoenix to Des Moines crosses a diverse landscape, and that means experiencing different types of air. Initially, you'll be over the Mojave and Sonoran Deserts, where thermal turbulence, caused by rising warm air, is common. As you head northeast, you'll encounter the Southern, Central, and Front Range of the Rockies, where mountain wave turbulence can occur as wind flows over the peaks. Once you cross the mountains and enter the Great Plains, clear-air turbulence (CAT) becomes a possibility. Finally, you'll be crossing Tornado Alley, especially from late winter through summer, severe convective turbulence can occur when weather conditions generate thunderstorms. While this sounds like a lot, remember that pilots are highly trained to navigate these conditions, using weather forecasts and radar to avoid the worst of it. They encounter these well-understood patterns regularly.

The Phoenix to Des Moines route passes over the Southern Rockies in New Mexico and southern Colorado. While somewhat lower than the peaks to the north, these mountains still produce notable mountain wave turbulence, particularly when strong southwesterly winds aloft align perpendicular to the ridgeline.

Turbulence Factors on This Route

• Thermal Turbulence: Extreme desert heating generates strong thermal updrafts that cause low-to-mid-level turbulence, especially in summer afternoons.
• Mountain Wave Turbulence: The Southern Rockies produce lee waves when southwesterly upper-level winds flow across the terrain.
• Clear-Air Turbulence (CAT): The jet stream frequently meanders over the Great Plains, producing wind shear and clear-air turbulence at cruising altitudes.
• Severe Convective Turbulence: Tornado Alley supercells produce some of the most intense convective turbulence in North American aviation.

When Is This Route Bumpiest?

For the smoothest flight, aim to travel in the early fall or winter. The air tends to be more stable during these times, minimizing thermal and convective activity. Summer, late winter, spring, early spring, and early summer are the bumpiest seasons to travel this route. The increased heat in summer amplifies thermal turbulence over the deserts, while spring and early summer bring more storms to Tornado Alley. Late winter and early spring are peak seasons for mountain wave turbulence in the Rockies, so be mindful of that too.

Tips for This Flight

If you're anxious about turbulence, booking an early morning flight is your best bet, as the air is generally calmer before the day heats up. Any turbulence you experience on this route will most likely feel like driving quickly down a bumpy dirt road for a few minutes at a time. Choosing a seat over the wing can minimize the sensation of movement. Staying well-hydrated can also help you feel more comfortable during the flight. Remember, turbulence is a normal part of flying, and the pilots are always in control, prioritizing your safety and comfort.

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Forecasts based on NOAA HRRR and GFS atmospheric model data.