Honolulu to Greenville Turbulence Forecast

HNL → GSP · 4,604 miles · ~9h 42m

What to Expect

Your Honolulu to Greenville flight is quite a journey, crossing many different types of terrain and weather systems, each capable of causing some turbulence. Initially, you'll be over the vast Open Pacific, where oceanic clear-air turbulence and oceanic convection can create some bumps. As you approach the Pacific Coast, you might encounter more clear-air turbulence. Further inland, over the Mojave and Sonoran Deserts, thermal turbulence from rising hot air could cause some chop. Crossing the Southern Rockies, mountain wave turbulence can occur, and over the Great Plains, more clear-air turbulence is possible. Tornado Alley can present severe convective turbulence, especially during certain times of the year. As you continue eastward, the Ozark Plateau, Mississippi Valley, Southeast Interior, and Southern Appalachians can each cause convective or mechanical turbulence. Pilots are highly trained to handle these conditions, and they constantly monitor weather patterns to navigate the safest and most comfortable route possible.

The Honolulu 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

• Oceanic Clear-Air Turbulence: Transoceanic jet stream crossings produce extended stretches of clear-air turbulence over the open Pacific.
• Oceanic Convection: Isolated thunderstorms over warm Pacific waters can develop away from radar coverage, catching flights off guard.
• 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.

When Is This Route Bumpiest?

For the smoothest possible flight, aim for spring, early summer, or summer. These seasons generally see calmer air over many of the regions you'll be crossing. Winter, late summer, early spring, late winter, spring, early summer, and summer tend to be bumpier, though. Winter and early spring can bring stronger jet streams and increased clear-air turbulence over the Pacific and Great Plains. Late summer and early fall often see more convective activity over the Ozarks, Mississippi Valley, and Southeast Interior, leading to more turbulence from thunderstorms.

Tips for This Flight

If possible, book your flight for a morning departure, as convective activity tends to build up later in the day. Any turbulence you experience on this route will most likely feel like driving quickly down a bumpy, unpaved road, not usually dangerous, but perhaps unsettling. Staying well-hydrated and focusing on slow, deep breaths can help you feel more relaxed. Choosing a seat over the wing can also minimize the sensation of movement. Remember, the pilots are experts at managing these conditions, and their priority is always your safety and comfort.

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Forecasts based on NOAA HRRR and GFS atmospheric model data.