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Often, turbulence is the harbinger of mountain waves, not the ideal ceiling—and visibility unlimited—day. Anything in the airplane not tied down floated, even dust from the flightdeck carpet, then slammed to the nearest surface moments later as we were caught by the next wave. I flew into that and the venturi effect that day.
On the advisory side, the FAA recently updated the related advisory circular on the topic: AC 00-63B – Use of FlightDeck Displays of Digital Weather and Aeronautical Information. Be aware of the product time or “valid until” time on the particular data link information displayed in the flightdeck.
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