Phoenix to Greenville Turbulence Forecast

PHX → GSP · 1,700 miles · ~3h 54m

What to Expect

The Phoenix to Greenville flight, arching east for roughly 1700 miles, offers a diverse range of potential turbulence. Initially, expect some possible thermal turbulence rising off the Mojave and Sonoran Deserts. As you cross the Southern Rockies, mountain wave turbulence becomes a possibility, though pilots are skilled at navigating these. Then, your flight path takes you over Tornado Alley, where, particularly during certain seasons, severe convective turbulence from thunderstorms can occur, though pilots actively avoid these storms. Moving across the Great Plains, clear-air turbulence, or CAT, could present some bumps. Later, over the Ozark Plateau and Mississippi Valley, keep an eye out for convective turbulence. Finally, as you near Greenville, you might encounter mechanical turbulence as the plane crosses the Southern Appalachians. Pilots are very familiar with these patterns and use onboard radar and reports from other pilots to choose the smoothest possible path.

The Phoenix to Greenville 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.
• Severe Convective Turbulence: Tornado Alley supercells produce some of the most intense convective turbulence in North American aviation.
• Clear-Air Turbulence (CAT): The jet stream frequently meanders over the Great Plains, producing wind shear and clear-air turbulence at cruising altitudes.

When Is This Route Bumpiest?

Winter and late fall generally offer the smoothest rides on this route. The lack of intense solar heating minimizes thermal turbulence over the deserts and lessens the chances of severe thunderstorms in Tornado Alley. Summer, late winter, spring, early summer, winter, and early spring can be bumpier. Summer sees increased thermal activity over the deserts and thunderstorm development, while late winter, spring, and early summer bring increased storm activity across Tornado Alley and the Southeast. Keep in mind that mountain wave turbulence can occur any time of year.

Tips for This Flight

Opt for a morning flight if possible; the atmosphere tends to be more stable before the day heats up. Any turbulence on this route will probably feel like driving on a slightly bumpy, unpaved road, or perhaps a boat gently rocking on the water. To stay relaxed, choose a seat over the wing for a more stable experience, stay hydrated, and focus on slow, deep breaths. Remember, pilots are highly trained to handle turbulence, and your safety is their top priority.

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Forecasts based on NOAA HRRR and GFS atmospheric model data.