New Edition of AC 00-6 Aviation Weather

FAA has published a new edition of AC 00-6 – Aviation Weather (PDF), the 1975 handbook that explains weather theory for pilots.

New scientific capabilities now necessitate an update to this AC. In 1975, aviation users were not directly touched by radar and satellite weather. In 2016, much of what airmen understand about the current atmosphere comes from these important data sources. This AC is intended to provide basic weather information that all airmen must know. This document is intended to be used as a resource for pilot and dispatcher training programs.

The new edition of the companion handbook, AC 00-45 Aviation Weather Services, which explains aviation weather reports and forecasts and the briefings available to pilots, is also available at the FAA website.

Simulated Wake-Turbulence Encounter

I do the exercise below with my stall/spin/upset students to simulate the disorienting effect of a wake-turbulence encounter. We perform 1-1/2 aileron rolls to inverted and then push and roll to recover to normal upright flight. The exercise is confusing at first, and the nose always drops well below the horizon during the “upset.” It’s a great way to help pilots understand what could happen if they were caught in a wintip vortex.

Wake turbulence caused by wingtip vortices is major hazard to small aircraft.


The wingtip vortices are a by-product of lift. You can find detailed information about wake turbulence in FAA Advisory Circular AC 90-23 and in the Aeronautical Information Manual (Chapter 7, Safety of Flight; Section 3, Wake Turbulence).