Weather forecast in Alta, for a week

Slight structural damage occurs (chimney-pots and slates removed)High waves. Dense streaks of foam along the direction of the wind. Crests of waves begin to topple, tumble and roll over. Spray may affect visibility

Breaks twigs off trees; generally impedes progress.Moderately high waves of greater length; edges of crests begin to break into spindrift. The foam is blown in well-marked streaks along the direction of the wind.

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.

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.

Wind felt on face; leaves rustle; ordinary vanes moved by wind.Small wavelets, still short, but more pronounced. Crests have a glassy appearance and do not break.

Leaves and small twigs in constant motion; wind extends light flag.Large wavelets. Crests begin to break. Foam of glassy appearance. Perhaps scattered white horses.

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