Los Angeles to St. Louis Turbulence Forecast

LAX → STL · 1,589 miles · ~3h 41m

What to Expect

Flying east from Los Angeles to St. Louis involves crossing a diverse range of landscapes, each with its own potential for creating turbulence. Initially, you'll be over the Mojave and Sonoran Deserts, where thermal turbulence caused by rising hot air can lead to some bumps. As you continue, you'll encounter the Southern Rockies and the Front Range, where mountain wave turbulence can occur when wind flows over the mountains. Further along, over the Great Plains, you might experience clear-air turbulence (CAT), which is often unexpected but usually not severe. Approaching St. Louis, your flight path crosses Tornado Alley and the Mississippi Valley, making severe convective turbulence and regular convective turbulence possible, especially in certain weather conditions. Your pilots are highly trained to manage these well-understood weather phenomena, using onboard radar and reports from other aircraft to navigate for a smooth flight.

The Los Angeles to St. Louis 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 possible flight, aim to travel in the early fall or winter months. During these periods, the atmosphere is generally more stable, reducing the likelihood of significant turbulence. Conversely, summer, late winter, spring, early spring, and early summer tend to be bumpier times to fly this route. Warmer temperatures in summer can intensify thermal and convective turbulence over the deserts and the Mississippi Valley, while the spring and late winter seasons bring unstable air masses that can lead to more mountain wave turbulence over the Rockies and convective turbulence in Tornado Alley.

Tips for This Flight

Choosing a morning flight can often lead to a smoother experience, as the atmosphere tends to be more stable earlier in the day. Any turbulence you encounter on this route will likely feel like driving over a series of small, unexpected potholes on a paved road. For extra comfort, consider selecting a seat over the wing, which tends to experience less motion. Staying well-hydrated can also help you feel more relaxed. Remember that the pilots are constantly monitoring conditions and are prepared to adjust the flight path as needed, ensuring your safety and comfort throughout the journey.

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Forecasts based on NOAA HRRR and GFS atmospheric model data.