Honolulu to Birmingham Turbulence Forecast

HNL → BHM · 4,364 miles · ~9h 14m

What to Expect

Flying from Honolulu to Birmingham means crossing a wide range of geographic features, each with its own potential for turbulence. Initially, you'll be over the open Pacific, where oceanic clear-air turbulence and convection can cause some movement. As you approach the Pacific Coast, clear-air turbulence might be present. Moving inland, you'll cross the Mojave and Sonoran Deserts, where thermal turbulence, caused by rising warm air, is common. The Southern Rockies can create mountain wave turbulence, and as you continue east, you'll fly over Tornado Alley, where severe convective turbulence is possible, particularly during certain times of the year. Finally, over the Ozark Plateau, Mississippi Valley, and Southeast Interior, convective turbulence can occur. All of these phenomena are well-understood weather patterns that pilots are trained to navigate, using onboard radar and reports from other aircraft to avoid the worst of it.

The Honolulu to Birmingham 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?

The smoothest rides on this route are typically during the spring, early summer, and summer months, and then again in the fall, late fall, and winter. Winter, late summer, early spring, spring, early summer, summer, and late winter tend to be the bumpiest seasons, with increased chances of convective activity over Tornado Alley, the Ozarks, and the Southeast. Thermal turbulence over the deserts can also be more pronounced in the warmer months, and mountain wave turbulence is common in the Rockies during the colder months, adding to the potential for a bumpier ride.

Tips for This Flight

If possible, consider booking a morning flight, as convective activity tends to build up later in the day. Any turbulence you experience will most likely feel like driving over a bumpy road or a sudden dip. To help stay comfortable, choose a seat over the wing; this area tends to experience less motion. Finally, remember to stay hydrated; dehydration can worsen anxiety. Taking slow, deep breaths can also help calm your nerves, and rest assured that the pilots and crew are highly skilled at managing any turbulence you may encounter.

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Forecasts based on NOAA HRRR and GFS atmospheric model data.