***Definition*** :: an area of calm water where the shoreline protects the water from the wind, creating an area of calm water ***Source*** :: [Forced landing without power – pattern](https://www.aviation.govt.nz/licensing-and-certification/pilots/flight-training/flight-instructor-guide/forced-landing-without-power-pattern/) from [[NZ CAA Flight Instructor Guide]] > [!quote] From [[NZ CAA Flight Instructor Guide]] > Wind shadow can be seen at the upwind end of a lake or pond. It's an area of calm water where the shoreline protects the water from the wind, creating an area of calm water. This effect is most noticeable in winds of 5 knots or more, when the sunlight reflects off the water's surface. A small version of this can be seen as you walk out to the aeroplane after rain. Puddles of water will display this same effect when the wind is blowing. Wind shadow is best seen on small ponds or lakes of stationary water, rather than large expanses of water. > [!quote] From [[Seaplane, Skiplane, and Float or Ski Equipped Helicopter Operations Handbook|Seaplane Handbook]] Chap 6 > There is usually a glassy band of calm water on the upwind shore of a lake. > [!quote] From [Go To Hull](https://seaplanepilotsassociation.org/wp-content/uploads/GoToHull.pdf) > If the wind is light or strong, it will show a wind shadow next to the offshore wind. The wind can't drop right down over the trees or weeds or a bank and ripple the water. The wind shadow will be glassy water. ***Additional Images***: - [Aerial Archives](https://aerialarchives.photoshelter.com/image/I0000lxReAm6J02k) - ![[Wind Shadow Labeled.jpeg]] - ![[Wind Shadow Unlabeled.jpeg]] #glossary