Weather forecast in De Koog, for 3 days

Large branches in motion; whistling heard in telegraph wires; umbrellas used with difficulty.Large waves begin to form; the white foam crests are more extensive everywhere.

Small trees in leaf begin to sway; crested wavelets form on inland waters.Moderate waves, taking a more pronounced long form; many white horses are formed.

Raises dust and loose paper; small branches are moved.Small waves, becoming larger; fairly frequent white horses.

Whole trees in motion; inconvenience felt when walking against the wind.Sea heaps up and white foam from breaking waves begins to be blown in streaks along the direction of the wind.

Seldom experienced inland; trees uprooted; considerable structural damage occurs.Very high waves with long overhanging crests. The resulting foam, in great patches, is blown in dense white streaks along the direction of the wind. On the whole the surface of the sea takes on a white appearance. The tumbling of the sea becomes heavy and shock-like. Visibility affected.