Philadelphia to Los Angeles Turbulence Forecast

PHL → LAX · 2,396 miles · ~5h 18m

What to Expect

The Philadelphia to Los Angeles route is a long one, crossing a variety of terrains and weather systems which means you might experience different types of turbulence along the way. Soon after leaving Philadelphia, you may encounter mechanical turbulence over the Northern Appalachians, where the mountains disrupt the airflow. As you head west, keep an eye out for clear-air turbulence (CAT) above the Atlantic Seaboard, a phenomenon that can occur even in seemingly clear skies. Over the Ohio and Mississippi Valleys, frontal and convective turbulence might make things a bit bumpy, especially if there are weather fronts or thunderstorms in the area. Flying over Tornado Alley could bring some severe convective turbulence. The Great Plains can have clear-air turbulence too. Approaching Los Angeles, the Front Range, Central, and Southern Rockies could cause mountain wave turbulence as the wind flows over the mountains. Finally, the Mojave and Sonoran Deserts might cause thermal turbulence. Pilots are very familiar with these patterns and use sophisticated tools to navigate them safely.

Flights between Philadelphia and Los Angeles pass along the Front Range, where the abrupt rise of the Colorado Rockies generates some of the strongest mountain wave turbulence in the continental U.S. Downdrafts east of the ridgeline can be intense, and rotor turbulence near the surface sometimes extends to cruising altitude during high-wind events.

Turbulence Factors on This Route

• Mechanical Turbulence: The Northern Appalachians generate low-level mechanical turbulence during strong post-frontal northwest winds.
• Clear-Air Turbulence (CAT): The Atlantic coast jet stream and land-sea temperature contrasts create frequent clear-air turbulence at cruising altitude.
• Frontal Turbulence: The Ohio Valley is a preferred storm track where frontal boundaries and embedded convection create turbulence year-round.
• Convective Turbulence: The Mississippi Valley is a breeding ground for squall lines and mesoscale convective systems that produce widespread turbulence.

When Is This Route Bumpiest?

For the smoothest possible flight, aim to travel this route in the early fall or fall. Summer and winter are also calmer than other times of the year. Winter, spring, early summer, and early spring tend to be the bumpiest. This is because those seasons bring stronger weather patterns, including increased frontal activity over the Ohio and Mississippi Valleys, greater potential for severe convective turbulence in Tornado Alley, and stronger winds interacting with the Rockies, leading to more mountain wave turbulence. Expect more thermal turbulence over the Mojave and Sonoran Deserts in the summer.

Tips for This Flight

If you're concerned about turbulence, consider booking your flight for early morning; the air is often calmer before the day heats up and creates more thermal activity. Any turbulence on this route is usually like driving on a slightly bumpy road, a sensation that's more noticeable than alarming. To help stay relaxed, choose a seat over the wing, where movement is typically less pronounced, and practice deep, steady breathing throughout the flight. Remember, the pilots are well-trained to handle these conditions, and the aircraft are built to withstand them; you're in safe hands.

Get Your Forecast

Related Routes

See all routes from Philadelphia or to Los Angeles.

More from Philadelphia

More to Los Angeles

Forecasts based on NOAA HRRR and GFS atmospheric model data.