Des Moines to Sacramento Turbulence Forecast

DSM → SMF · 1,482 miles · ~3h 28m

What to Expect

Your flight from Des Moines (DSM) to Sacramento (SMF) covers a good chunk of the country, about 1482 miles heading west, and that means crossing some significant terrain. The first part of the trip takes you over the Great Plains, where you might encounter clear-air turbulence (CAT). CAT can happen even when the sky looks perfectly clear, because it's caused by differing air speeds at high altitudes. As you approach the Central Rockies and then the Sierra Nevada, keep in mind that this area is prone to mountain wave turbulence. This happens when strong winds hit the mountains and create waves in the air, like ripples in a stream. Pilots are well aware of these possibilities and are trained to handle them; they use weather forecasts and radar to navigate these conditions safely, so it's all very routine for them.

Between Des Moines and Sacramento, the flight path crosses the Central Rockies of Colorado and Utah. This area is one of the most turbulence-prone zones in the U.S., with mountain wave activity reported on more than half of winter days. Waves can propagate far downstream, meaning turbulence may begin well before or after the visible peaks.

Turbulence Factors on This Route

• Clear-Air Turbulence (CAT): The jet stream frequently meanders over the Great Plains, producing wind shear and clear-air turbulence at cruising altitudes.
• Mountain Wave Turbulence: The Central Rockies produce frequent, sometimes severe, mountain waves that can extend 100+ miles downstream.

When Is This Route Bumpiest?

For the smoothest possible flight on this route, aim for summer, early fall, or fall. During these months, the atmosphere tends to be more stable, reducing the likelihood of both clear-air turbulence over the plains and mountain wave turbulence over the Rockies and Sierra Nevada. Winter, early spring, and spring, however, tend to bring stronger winds and more atmospheric instability. The increased temperature differences can amplify clear-air turbulence, while the powerful winds interacting with the mountains create stronger mountain waves.

Tips for This Flight

If you're concerned about turbulence, the best strategy for this route is to book an early morning flight if possible. The air is generally calmer in the morning before it heats up during the day. Any turbulence you might experience on this route is most likely to feel like driving on a road with a few bumps, so it's usually nothing too dramatic. To help stay relaxed, choose a seat over the wing, as it tends to be the most stable part of the plane, and focus on deep, steady breathing; remember that the flight crew is highly skilled and trained to handle any situation, and you'll be landing in sunny Sacramento before you know it.

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Forecasts based on NOAA HRRR and GFS atmospheric model data.