Register

Reading Surface Charts

A prevailing high from Canada dominates most of the U.S. weather.
Gemini Sparkle

Key Takeaways:

  • The article analyzes surface weather charts by detailing two fundamental patterns: the "Prevailing High" and the "Pacific Storm System."
  • The "Prevailing High" pattern originates from Canada, bringing strong high pressure, extreme cold, and widespread wintry weather, with winds circulating clockwise.
  • The "Pacific Storm System" pattern features eastward-moving low-pressure systems from the Pacific, delivering active weather, including precipitation and a heightened risk of severe storms in the southeastern U.S., with winds circulating counter-clockwise.
See a mistake? Contact us.

Last month, we discussed upper-air charts and how they shed light on your flight plans. Now, let’s talk about surface charts. In the May 2021 issue we covered a little bit about surface charts, but focused mostly on how to read the station plots—the little groups of data found at each city. It’s time for a more in-depth look at weather patterns, as we put fronts and the ever-mysterious highs and lows under the microscope.

We’ll focus on two of the most fundamental weather patterns often seen during the fall, winter, and spring months: the prevailing high pattern and the Pacific storm-system pattern. Most of the interesting weather you encounter will fall into one of those two groups.

Ready to Sell Your Aircraft?

List your airplane on AircraftForSale.com and reach qualified buyers.

List Your Aircraft
AircraftForSale Logo | FLYING Logo
Pilot in aircraft
Sign-up for newsletters & special offers!

Get the latest stories & special offers delivered directly to your inbox.

SUBSCRIBE