Brief Like a Weather Pro

Step into an aviation forecaster’s shoes and see how it’s done.

Tim Vasquez

Thursday, June 26, 2025 at 08:00 AM ET

Verified

Edited By:

Travis Tingle

The 300 millibar chart is used for hemispheric work at jet stream level. [Courtesy: AWIPS-II / Tim Vasquez]

Key Takeaways:

The article outlines a "forecast funnel" methodology for aviation weather, starting with the analysis of large-scale upper-air patterns before progressing to detailed surface conditions.
It emphasizes the use of upper-tropospheric charts (e.g., 300 millibar) to identify major weather drivers like the polar vortex, subtropical ridge, and jet stream, which indicate overall atmospheric dynamics, wind strength, and broad weather patterns such as troughs (bad weather) and ridges (good weather).
The process then moves to surface charts, explaining how to interpret isobars and 100-500 millibar thickness lines to understand air masses, pressure systems, fronts, and how these surface features interact with upper-level dynamics to produce specific weather events.

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Since I began my column over 10 years ago in IFR Magazine, I’ve strived to write as though you’re with me in the weather operations center.

During most of my Air Force career, I worked as an aviation forecaster. For many years, this was a constant succession of four days on, three days off, with rotating shifts. After driving to work, we would begin a shift-change briefing. If this was in the morning, the entire weather station would participate. If it was evening, the events would be more relaxed, with just me and the outgoing forecaster reviewing things.